Circular slide rules for sale

Circular slide rules for sale DEFAULT
Technetium/Pale Horse Designs
50mm Slide Rule Coins






This Desk Sized (7 inch) plastic Date Finder is a highly requested circular from business people, purchasing agents, production managers and others, we now have them in small quantities (the normal buy is 500+ from Datalizer). This version does both days and weeks from now (or any date) to any date. Very handy for determining when those '8 week delivery' items will really arrive. Instructions are printed on the rear. These will be a stock item for us (replaces discontinued 7 and 8 inch previous models), so we can supply any quantity with some delay. Yes, Made in USA.




This Desk Sized (7 inch) plastic Date Finder is a highly requested circular from business people, purchasing agents, production managers and others, we now have them in small quantities (the normal buy is 500+ from Datalizer). This version does both days and weeks from now (or any date) to any date. Very handy for determining when those '8 week delivery' items will really arrive. Instructions are printed on the rear. These are being discontinued in favor of the blue style above, no more when these are gone. Yes, Made in USA.




This shirt-pocket sized (4 inch) plastic Date Finder is a highly requested circular from business people, purchasing agents, production managers and others, we now have them in small quantities (the normal buy is 500+ from Datalizer). This version does both days and weeks from now (or any date) to any date. Very handy for determining when those '8 week delivery' items will really arrive. These will be a stock item for us, so we can supply any quantity with some delay. Yes, Made in USA.




This shirt-pocket sized (4 inch) plastic Profit Dial is the most requested circular from business people, we now have them in small quantities (the normal buy is 500+ from Datalizer). This version does both profit on cost and profit on selling cost, making it very handy in any sales environment. These will be a stock item for us, so we can supply any quantity with some delay. Yes, Made in USA.


























CLICK for bigger PIC!
Click for a BIGGER PIC! <

E-Mail US!

Norma Grafia 190, CLICK for bigger PIC!
Click for a BIGGER PIC!

Norma Grafia 190, CLICK for bigger PIC!
Click for a BIGGER PIC!

E-Mail US!
Radiation Effects Rule
Radiac No. 1


NEW, mint condition, UK military radiation effects rule, computes radiation dosage over land or sea (disks are removable and can be flipped over for alternate scenarios (blue/water, white/land). This is the original version.


The set includes the rule with changeable disks, and snap closure pouch.
CLICK for bigger PIC!Full instructions
are on the rule reverse side
.

Interestingly, while it allows you to elegantly compute your radiatioon dosage, it does not say how much is fatal. An unfortunate oversight, if you should happen to really need to use this rule.Radiation Effects Rule
Radiac No. 1 Mk2


NEW, mint condition, UK military radiation effects rule, computes radiation dosage over land or sea (disks are removable and can be flipped over for alternate scenarios (green/water, red/land). This is the flashy Mk2 revised version, wahoo.


The set includes the rule with changeable disks, and snap closure pouch. Full instructions are on the rule reverse side.

Interestingly, while it allows you to elegantly compute your radiatioon dosage, it does not say how much is fatal. An unfortunate oversight, if you should happen to really need to use this rule.



Aristo 615 Aviat, CLICK for bigger PIC!

Aristo 615 Aviat, CLICK for bigger PIC!


E-Mail US!

*


The TPC scale correspond to 8" per statute mile used on Sectional Aeronautical Charts, and the ONC scale 16" per statute mile used on World Aeronautical charts. (These are the US civil aviation names, the military and maybe other countries use the TPC/OPC designations.

The compass rose is normally placed on a starting point on a chart orientated to north, then the scale is rotated to the desired course. The heading is read on the compass rose, and the milage is read on the TPC/ONC scale. If you wish to know more, e-mail Craig Kielhofer who is a pilot and can answer your questions.



Aristo 618, CLICK for bigger PIC!

Note, does NOT have the red reciprocal compass numbers shown above, otherwise the same.

Aviat 617, CLICK for bigger PIC!


E-Mail US!





Aristo 618, CLICK for bigger PIC!

Aviat 617, CLICK for bigger PIC!


E-Mail US!






CLICK for bigger PIC!

CLICK for bigger PIC!


E-Mail US!





Sours: https://www.sphere.bc.ca/test/circular.html

Slide rules that are round offer the length of a 10" rectangular slide rule in a pocket-sized (roughly 3.6") format, since the scales are on the circumference of circles. The scales are also continuous, so there is no need to make adjustments, such as folded and inverse scales, for results of calculations that go off the ends of the scales. Furthermore, these instruments are relatively easy to construct: the scales are printed on one or more disks, and the disks or a single disk and cursor are fastened together with a pin at the center. However, this simple construction is also not very durable, and so circular slide rules may get out of position and thus they lack accuracy, compared to linear slide rules with slides that move along carefully grooved channels.

This collection suggests the diverse appearances and functions of circular slide rules that were manufactured between the mid-19th and late 20th centuries. For example, before Mannheim-type linear slide rules became popular in the late 19th century, American inventors patented a variety of circular designs. Some circular slide rules were made to look like pocket watches, while others were intended to promote particular businesses—Whitehead & Hoag and Perrygraf were especially influential American manufacturers of promotional items. Inventors and makers such as Albert Sexton, Louis Ross, Claire Gilson, Norman Albree, and Ross Pickett wanted their circular slide rules to compete with linear instruments in the engineering and education markets. Other circular slide rules were designed specifically for surveying, such as stadia computers, or for navigation, such as Dalton instruments that may also be seen in the Smithsonian's exhibition, Time and Navigation. Even more specialized in purpose were slide rules for grading earthworks, determining the effects of nuclear bomb explosions, writing efficient computer programs, and betting on horse races.

Sours: https://www.si.edu/spotlight/slide-rules/circular-slide-rules
  1. Hp omen motherboard replacement
  2. Verses about jesus as king
  3. Stiga hockey table
  4. Salesforce api example


OAO Kalibr Moscow Circular Slide Rule Calculator
REF OAO Kalibr Moscow Circular Slide Rule Calculator
Made in USSR by OAO Kalibr-Moscow
Front Scale (with logo)
K, A, C ( D, CI )
Back Scale: T, ST, S ( C, L )
Photo Contributed By Dushan Grujich Collection, Australia

ALRO PATENT System ALRO 200R
ISRM 13.01.26.01ALRO PATENT System ALRO 200R
Made in The Hague, Holland
Dimensions: 125x135x12 mm
Patents No's (stamped on metal hub): USA 2,117,155; France 808,295; Gr. Britain 443689; Belgium 413,897; Germany 643,571; Holland 41,324
Front Scale
S, T, S&T, kW, N2, N ( N , N2, R, N3)
Cover Scale: Decimal/fraction, Log spiral scale
Acquired from the Netherlands, made possible by a gift from Robert L. Allison of Ballard, Washington.
See many more specimens in the ALRO gallery here at ISRM.

Dempster RotaRule - model AA (Dietzgen 1798 w/Case)
ISRM 13.05.28.01

Instruction Sheet, Legal size, two front and back sheets Dempster RotaRule - Model AA (1933-1948)
Made in USA - Designed and manufactured by Jack Dempster, Berkeley, California.
Front Scales: K, A, D ( C, CI, CIF, S, CS, ST, T, CT, G, B, F/i )
Back Scales: 1-100 in 4circles, DLL, V2 ( V1, 1-100 in 4circles, LL3, LL2, LL1, LL%, L )
Acquisition made possible by contributions from Dick Rose Vintage Instruments

Dietzgen Model 1798C leather case, Model 1798 shown in 1938 Dietzgen Catalog (in ISRM Library), additional image from Hermann's Slide Rule Catalog as ISRM specimen has a faded back cursor.

REF - Boykin RotaRule - model 510
REFBoykin RotaRule - Model 510 (1960-1973)
Made in USA - Designed by Bernard C. Boykin (1921-2011), Ruxton, Maryland.
Front Scales: K, A, D ( C, CI, CIF, S, CS, ST, T, CT, B, L )
Back Scales: D50:1-100 in 4 circles, DLL (V2, V1 C50:1-100 in 4 circles, LL3, LL2, LL1, LL01, LL02, L03 )
Archive - Various sources

Bernard C. Boykin passed away May 12, 2011. He was born in Ruxton, Maryland in 1921. He earned a BS degree in Chemistry from Williams College in 1942/43 and another BS degree in Chemical Engineering from John Hopkins University in 1954. During World War II he was a radar officer in the United States Navy. After the war he designed the Boykin RotaRule, a very complex disk slide rule used by engineers and scientists for their calculations. It was based on the Dempster's Rotarule design who's patent had expired, but with improved scales. The trig scales are in decimal degrees.


Huet MG 240C Circular
REFHuet MG 240C Circular
Made in France - 1925br> Front Scale (Long Spiral): Sines, Tangents, Metres
Archive - Courtesy of Rod Lovette's Collection (UK)

Amphenol Circular Slide Rule & RF Smith Chart
ISRM 13.02.13.05
Note: Bunker Ramo Corporation was founded by George M. Bunker and Simon Ramo in 1964, jointly owned by Martin-Marietta and Thompson Ramo Wooldridge TRW. The resulting company, Bunker-Ramo, was based in Trumbull, Connecticut.It became a manufacturer of military electronics devices and digital computers. In 1967 the Amphenol corporation (a manufacturer of electrical connectors) merged with Bunker Ramo. Amphenol Circular Slide Rule & RF Smith Chart
Made in USA by Bunker Ramo, Amphenol RF Division, Danbury, Connecticutt.
9.25in [23.5cm] Diameter Plastic Film
Front Scale: D, ( C, CI,A, K, L, T Cot, S Cos, ST)
Back: Radio Frequency Smith Chart (with cursor on cursor):
Wavelength toward Generator, Wavelength toward Load (Angle of Reflection, Negative Reactance Component, Positive Reactance Component, Resistance Component)
Cursor Scales: Voltage or Current Limits, Voltage or Current Ratio, Attenuation Dissipation Reflection, IDB Loss, Toward Generator, Toward Load
Detail of Sliding Cursor mounted on Rotating Cursor on Smith Chart Side.
This slide rule and others in the ISRM archives were donated through the generosity of Phillip Rodley of New Zealand


Science Spectrum Octal-Decimal Slide Rule Calculator
REFScience Spectrum Octal-Decimal Slide Rule Calculator 1969
Made in USA by Science Spectrum, Inc, Santa Barbara, Calif.
Designed by Phillp J. Wyatt, Albert S. Trundle, Judith B. Bruckner
Patent Filed in 1969: Issued April 4, 1972, US 3,654,437
8in Diameter Vinyl Plastic disk.
Note: This design is similar to the single Gilson circular slide rule with three cursor arms.
Back Scale: (Octal: CO, C20) (Decimal: D spiral scale)
Archive - Photo by David Sweetman collection, Nevada

Company Logo, 1969 Sales Brochures (236 Kb PDF), 1972 Patent (1MB PDF)


Science Spectrum Hexa-Decimal Slide Rule Calculator
REFScience Spectrum Hexa-Decimal Slide Rule Calculator 1969
Made in USA by Science Spectrum, Inc, Santa Barbara, Calif.
Designed by Phillp J. Wyatt, Albert S. Trundle, Judith B. Bruckner
Patent Issued 1972, Filed in 1969: US 3,654,438
8in Diameter Vinyl Plastic disk.
Note: This design is similar to the single Gilson circular slide rule with three cursor arms.
Front Scale: (Octal: CH, CIH, AH, LH) (Decimal:C, CI A, L ) ( 16H: Decimal Powers of 10H(=16D) Scale)
Back Scale: (Octal: CH ) (Decimal: D spiral scale)
Archive - Photo by David Sweetman collection, Nevada

Company logo, 1969 Sales Brochures (236 Kb PDF), 1972 Patent (1Mb PDF)


Curtis L-M Rule, Frequency Response Calculator 1953
ISRM 14.04.30.01
The above circular slide rule belonged to Ben Emmerich (1922-2010). He was a German aircraft engineer who in the course of his career helped develop the Transall, the Starfighter, the Tornado and the Eurofighter. The slide rule was donated in his memory by his family.
Curtis L-M , Frequency Response Calculator
Made in USA. Designed by Emory C. Curtis ©1953.
Construction: 6-1/4 in Diameter Disks. 3 plastic disk with paper scales.
Front Scale: Frequency, Frequencing Ratio, Damping Ratio (Xm/Xo, Phase Angle Degrees)
Back Scale: Decibels, Aplitude Ratio, Damping Ratio, (Mp, Amplitude Deviation, Formulae)
Gift of Ellen Emmerich, Munich, Germany, in memory of her father Ben Emmerich.
Ellen Emmerich, his daughter, writes: "A friend of my father's in Minneapolis says: 'The slide rule you have is used to calculate the frequency response of control systems. Your Dad might have used it in his work on the VJ101. The graph on the bottom view is a Bode plot of a second order system. The slide rule would allow you to enter the damping ratio of the system and the trequency with which the system was being driven; and it woult tell you the ratio of the system output to its input. Examples of second order systems would be a spring suspended from a coiled spring. Another would be the servo actuators we used on the VJ101 to position the engine throttles.'"

Fearns A7 Universal Metric Converter
ISRM 17.10.10.04
InstructionsFearns A7 Universal Metric Converter
Made in England by Fearnes Calculators, Dunston, Gateshead 11, UK
5-1/2 in Diameter Pasltic
Front Scale: Index (1-105), Metric (C) (Imperial (D)) &dec;F, °C
Back: Instructions, Conversion Index, Abbreviations, S.I. Units, Notes
Original Owner/Location: Brian C. Cunningham, Australia (has name on back of stock)
Donated by Andrew (son) and Barbara (wife) Cunningham, Willagee, W.A., Australia.

Brian C. Cunningham (1935-2013)
Brian was born in Port Pine, South Australia, Australia. His education commenced there and continued at the South Australian School of Mines where he gained his Diploma in Mining & Metallurgy. He became a Student Member of the Australian Institute of Mining & Metallurgy rising to a Fellow member. Brian started his career as a Metallurgical Cadet at the B.H.A.S. (Broken Hill Associated Smelters) in Port Pirie. He transferred to Hamersley Iron in Perth, Western Australia, the subsidiary company of Conzinc Rio Tinto Aus. where he became an Executive Officer of the Hamersley Iron Group. In Brian's studies and work his slide rules where used extensively.


Fearns A13 Circular Slide Rule
REF
Fearns A13 Circular Slide Rule
Made in England by Fearnes Calculators, Dunston, Gateshead 11, UK
5-1/2 in Diameter Pasltic
Front Scale: K, A (( B, C,) D, Log, Sin Tan)
Back: Instructions, Conversion Index, Abbreviations, S.I. Units, Notes
Scan provided by Michael Syphers of Illinos. His website is Following The Rules..

Davis Instruments T-S-D Computer
ISRM 14.07.02.96Davis Instruments T-S-D Computer
Made in USA by Davis Instruments Corp., Hayward, CA.
6in Diameter Plastic
Front Scale (C&D scale): DISTANCE: Nautical or Statute Miles, KM or Yards (TIME: Minutes, Hours) SPEED
Back: Instructions
Gift Of Ed G. Millis, Dallas, Texas.
Ed Millis was at TI while the electronic 'slide rule' calculator was developed and is good friends with Jerry Merryman, the designer of the first calculator in 1967. Ed has also written a book on hobbies Hither, Thither and Yawn. Ed is a generous donor of over a hundred slide rules, calculators and ephemera to ISRM.

Miller Dial Circular Slide Rule
ISRM 13.02.23.01Miller Dial Circular Slide Rule
Made in USA. Data Charts by Miller Dial,El Monte, Calif.
6in Diameter PaperBoard
Front Scale: D, ( C, CI, L, A, K)
Back: Instructions


General Industrial Slide Rule 1959
ISRM 14.01.10.10General Industrial Slide Rule 1959
Made in USA. by Slide-chart Corp. PERRYGRAF Corp, Maywood, Ill.
for General Industrial Co., 1788 Montrose, Chicago 13, Ill. LOngbeach 1-5871
4in Diameter PaperBoard
Front Scale: D, ( C )
Back: Instructions
Gift of Bill Wehrend Collection, Palo Alto, California.


C-Thru S-96 Slide Rule 6in dia
ISRM 04.09.27.01.D1C-Thru S-96 Slide Rule 6in dia
Made in USA - C-Thru Ruler Company, Hartford, Conn.
Front Scale: K, D, ( C, B, A, CI, L)
Back Scale: S, L, T
Back: Instructions


C-Thru PS-69 Proportional Scale 5in dia
ISRM 14.07.22.09C-Thru PS-69 Proportional Scale 5in dia
Made in USA - C-Thru Ruler Company, Hartford, Conn.
Front Scale: Reproduction Size ( Size of Original, L) Percentage of Original Size, Number of Times of Reduction.
Back: Blank
Gift of Phillip Rodley, Upper Hutt, New Zealand.


REF SCA Circular Slide Rule SCA Circular Slide Rule (1973)
Made in Australia by Slide Charts of Australia
Front Scale (Extended)
CI, C ( D, A, K, L)
Back Scale
Orginal Area (Conversion Factor, Converted Area)
Scan provided by Cyril Catt. Australia


ISRM - Ground Water Hydrology Computer

Ground Water Hydrology Computer - 4 coaxial disks 10mm thk
Made in USA by Info, Inc Newton, MA (1967) for Layne Associates, Memphis, TN
Front Scales - Transmissivity (T), Storativity (S), Time (t), Radius (r), factor (u), and Well Function of u [W(u)].
Back Scales - Well Function [W(u)], Transmissivity (T), Discharge (Q), Drawdown (s), and std. C, and D scales.

Solves This Non-Equilibrium Equation for Ground Water:
s = 114.6 Q W(u) / T; W(u) = e-u / u du; u = (1.87 r2 S) / (T t)

Donated by the designer, N. Thomas Sheahan, Research Geologist, Layne Research Division, Memphis, TN Sheahan writes: "About 1,000 of the circular Ground Water Hydrology Calculator slide rules were produced... We had many of them printed with the names of the various associated Layne firms, but some were left blank to allow personalization. I continued to use this slide rule in the field and office from 1967 until the 1990s when I was finally able to get an HP-100LX, the first hand-held calculator that could solve this equation. Since then, I have had the slide rule as a wall decoration in my office until I retired this year (2008)".



Weems & Plath 105 Nautical Slide Rule
ISRM 04.04.22.05Weems & Plath 105 Nautical Slide Rule
Made in USA by Weems & Plath, Annapolis, MD, 2002
Front Scale
Distance Naut Miles, Yards (Speed, Time Min, Hrs )
Back: Instructions on use
Owner: Mike Konshak's Personal instrument, used for USCG American Boating Course and Coastal Navigation traing.

ISRM Graphic Chemical PredictorGraphic Chemical Predictor
Made in USA by Dyna-slide Co. Chicago, Illinois - 8" diameter
Front Scales - Chemical Compunds, Oxidization Equations, Reduction Equations
Back Scale - Instructions
Donated by the children of Norman D. Fulton Jr.
Norman D. Fulton (1918-2010) used this Graphic Chemical Predictor during his career at Proctor and Gamble Co. He held various, positions at P&G heading up analytical labs, methods departments and other R&D areas where he could apply his knowledge and Sc.B. in chemistry. He retired in 1983 in Loveland, Ohio. His children, Ginger, Bobbie and Norman (Dudley) wanted to honor their father with this donation.


ISRM - Helical Spring Design ComputerHelical Spring Design Computer - 5 coaxial disks 10mm thk
Made in England (1977) for Associated Spring Corp (ASC)
Front Scale - Stress Calculator
Load, Spring Index, Ratio of Sides, Mean Dia (Dia of Wire, No.Coils (Deflection, Correction Factor))
Back Scale - Rate, Load and Deflection Calculator
Load, Spring Index, Ratio of Sides, Mean Dia (Dia of Wire, No.Coils (Stress, Modulas of Rigidity))
Donated by Jack Rababeh, Senior Engineer at ASC

REF - Standardgraph No. 910 Disco-RietzStandardgraph No. 910 Disco-Rietz
Made in West Germany c1960 - 12.8cm diameter
Front Scale - L, CI, C ( D, Sin Cos, Tg Ctg, R)
Archive - Scan donated by John Krijnen, Netherlands

Mascot Vest Pocket Slide Rule - 1934
Made or distributed in USA by Tavella Sales Compan, 25 West Broadway, New York, N.Y.
Note: Tavella Sales Co. also distributed the Gilson Midget at one time.
Material 0.7mm[0.067in) thick 69mm[2.72in] diameter plastic disk
Front Scale: L, D ( C, CI )
Back Scale: S, A, K, T
Mascot Vest Pocket Slide Rule - 1934
Made or distributed in USA by Tavella Sales Compan, 25 West Broadway, New York, N.Y.
Note: Tavella Sales Co. also distributed the Gilson Midget at one time.
Material 0.7mm[0.067in) thick 69mm[2.72in] diameter plastic disk
Front Scale: L, D ( C, CI )
Back Scale: S, A, K, T
Gift of Mr. Murphy of East Wanatchee, Washington


Post Binary 8inch Circular Slide Rule (Model 1464)
ISRM 18.09.17.20Post Binary 8inch Circular Slide Rule (Model 1464) 8in 21.1cm dia.
Made in USA - Gilson Slide Rule Co.
Front Scales
C,CI,A,K,Log,LL1,LL2,LL3,LL4,Binary, Fraction,Drill,Thread, Millimeter
Back Scales
Degrees, S, T, Degrees, S, T, Degrees, S, T, Fractions
Gift of Donald J. Bachelor Collection
Manual 0.98Mb


Gilson Binary Early Steel VersionGilson Binary Early Steel Version
Made in USA by Gilson. Printed on steel plate.
Front Scales: C, S-Log.
Back Scales: Degrees, Sines, Cosines, Tangents, Cotangents.
Archive - Originally part of the Conrad Schure Collection. Scan by Jim Bready.


Gilson Atlas (Square base) 20.5 cm diaGilson Atlas (Square base) 20.5 cm dia.
Made in USA by Gilson. Printed on aluminum plate.
Front Scales
C, S-Log, C (25 spirals), C-Log, Coils, Constants
Back Scales
Degrees, S, T, Degrees, S, T, Degrees, S, T, Fractions
Archive - Michael Frey Collection


Gilson Atlas Type-3 21.1cm dia
ISRM 15.09.27.02Gilson Atlas Type-3 21.1cm dia.
Made in USA by Gilson
Front Scales
C, S-Log, C (25 spirals), C-Log, Coils, Constants
Back Scales
Degrees, S, T, Degrees, S, T, Degrees, S, T, Fractions

4.08MB
Gilson 8" Binary Circular
ISRM 21.06.16.01Gilson 8" Binary Circular (Gilson - 1931, 1940 Copyrights) - 21.4cm dia
Made in USA by Gilson Slide Rule Co., Stuart, Florida
Front Scales
C,CI,A,K,Log,LL1,LL2,LL3,LL4,
Back Scales
Binary, Fraction,Drill,Thread, Millimeter
Original owner: Robert Dehn.
Bob Dehn's Collection gifted by wife Fran (McGroary) Dehn of Menlo Park, California.
Robert "Bob" Dehn (1941-2000) graduated from UC Berkeley with a degree in chemistry. Following his graduation, Bob started work as a pharmaceutical chemist at Stanford Research Institute, which later became SRI International. It was there that he spent his entire professional career. It was also at SRI that he met his wife of 52 years, Fran McGroary. After receiving his MBA from Santa Clara University, Bob moved into marketing and business development for the Life Sciences Division of SRI where he continued until his retirement in 2007..Bob began collecting with his first slide rule while studying at UC Berkeley. During his career he continued to collect from colleagues, antique shows and swaps.

Bruning 2472 (Gilson Midget)
ISRM 17.06.14.03
Bruning 2472 (Gilson Midget)- 10.2cm dia
Made in USA for Bruning by Gilson Slide Rule Co., Stuart, Florida
Note: Copyright 1931 & 1936
Front Scales
C, CI, A, K, Log, LL1, LL2, LL3, LL4,
Back Scales
Binary, Fraction, Drill, Thread, Millimeter
Gift Of Bruce HildenBrand
8MB PDF

Bruning 68-471 (Gilson Binary) 21.1cm dia
ISRM 17.06.14.01Bruning 68-471 (Gilson Binary) 21.1cm dia.
Made in USA by Gilson for Bruning. Copyrighted 1940.
Front Scales
C, CI, A, K, Log, LL1, LL2, LL3, LL4, Binary, Fraction, Drill, Thread, Millimeter
Back Scales
Degrees, S, T, Degrees, S, T, Degrees, S, T, Fractions
Gift Of Bruce Hildenbrand
Manual 8Mb



Dietzgen 1797B (Gilson Binary) 21.1cm dia
ISRM 17.07.27.02
Dietzgen 1797B (Gilson Binary) 21.1cm dia.
Made in USA by Gilson for Dietzgen (1931 and 1940 Coprights(
Front Scales
C,CI,A,K,Log,LL1,LL2,LL3,LL4,Binary, Fraction,Drill,Thread, Millimeter
Back Scales
Degrees, S, T, Degrees, S, T, Degrees, S, T, Fractions
Gift of Linda N. Boclair, Voohees, New Jersey. Belonged to Step father Spafford W. Schanck.
Manual 3.42Mb


Compass 8" Binary (Gilson) Circular
ISRM 17.08.24.01Compass 8" Binary Circular (Gilson - 1931, 1940 Copyrights) - 21.4cm dia
Made in USA for Compass by Gilson Slide Rule Co., Stuart, Florida
Front Scales
C,CI,A,K,Log,LL1,LL2,LL3,LL4,
Back Scales
Binary, Fraction,Drill,Thread, Millimeter


REF Gilson Midget (1919 Patent Pending) Early ArtworkGilson Midget - 9.9cm dia - 1919 Patent Pending
Made in USA - Gilson Slide Rule Co., Niles, Michigan
Scales front: C, CI, L, A, Binary, LL (Spiral), Fractions, Drill Scale (1/2 turn), Thread Scale (1/2 turn) Binary, Fraction,Drill,Thread, Millimeter
Scales back: Sin/Cos, Degrees, Tan/Cot, Frac/Dec Equiv.
Scan contributed by Ronald Kuc


Gilson Midget (Patent 1-17-1922 Niles, Mich.)
ISRM 13.11.23.01Gilson Midget - 10.2cm [4in] dia - Patent 1-17-1922
Made in USA - Gilson Slide Rule Co., Niles, Michigan
Scales front: C, CI, L, A, Binary, LL (Spiral), Fractions, Drill Scale (1/2 turn), Thread Scale (1/2 turn) Binary, Fraction,Drill,Thread, Millimeter
Scales back: Sin/Cos, Degrees, Tan/Cot, Frac/Dec Equiv.


REF Gilson Midget (Patent 1-17-1922 Stuart, Florida) Gilson Midget - 10.2cm [4in] - 1927-1931
Made in USA - Gilson Slide Rule Co., Stuart, Florida
Scales front:  C, CI, L, A, Binary, LL (Spiral), Fractions, Drill Scale (1/2 turn), Thread Scale (1/2 turn) Binary, Fraction,Drill,Thread, Millimeter
Scales back:  Sin/Cos, Degrees, Tan/Cot, Frac/Dec Equiv.
Archive - Ted White Collection



Gilson Midget (1931, 1936)
ISRM 11.05.16.01Gilson Midget (1931, 1936) - 10.2cm dia
Made in USA - Gilson Slide Rule Co., Stuart, Florida
OEM to Dietzgen (1797M), Pickett.
Front Scales
C,CI,A,K,Log,LL1,LL2,LL3,LL4,
Back Scales
Binary, Fraction,Drill,Thread, Millimeter
Donated By Ric Turley, Pinecliff Colorado, in memoriam for Roy Glenn Wood (1932-2005)
Roy owned this circular slide rule and had attended the University of Colorado at Boulder. He worked as an engineer for Public Service Company of Colorado for more than 30 years.


ISRM - Gilson Midget (1931, 1936)Gilson Midget (1931, 1936) - 10.2cm dia
Made in USA - Gilson Slide Rule Co., Stuart, Florida
OEM to Dietzgen (1797M), Pickett, Lietz, Compass, etc.
Front Scales
C,CI,A,K,Log,LL1,LL2,LL3,LL4,
Back Scales
Binary, Fraction,Drill,Thread, Millimeter
Adv (on Case): JVG

Compass Midget (1931, 1936) - 10.2cm dia
Made in USA for Compass by Gilson Slide Rule Co., Stuart, Florida
Front Scales: C,CI,A,K,Log,LL1,LL2,LL3,LL4,
Back Scales: Binary, Fraction,Drill,Thread, Millimeter
Donated by David Viscusi, Carlsbad, California David bought this slide rule when he was a Drafting apprentice at General Electric, Schenectady NY (1971). Already well used, it was purchased for $5 from a retiring engineer that helped design Large Steam Turbine Generators. It helped get him through his BSME night courses. David is now an Engineering & Technical Services Supervisor at Gemological Institute of America (GIA)
Instructions

A. Lietz Co. No.3077 Midget Circular Slide Rule
ISRM 21.08.07.20A. Lietz Co. No.3077 Midget Circular Slide Rule (1938)
Made in USA by Gilson for A. Lietz Co. San Francisco and Los Angeles, Calif.
3 plastic cursors on aluminum disk
Front Scales: C,CI,A,K,Log,LL1,LL2,LL3,LL4,
Back Scales: Binary, Fraction,Drill,Thread, Millimeter


Dietzgen 1797M (Gilson Midget) V2
ISRM 08.04.10.01
Dietzgen 1797M (Gilson Midget)- 10.2cm dia
Made in USA for Dietzgen by Gilson Slide Rule Co., Stuart, Florida
Note: Copyright date removed from the previous artwork (circa 1960-70) and the background is a darker green.
Front Scales: C,CI,A,K,Log,LL1,LL2,LL3,LL4,
Back Scales: Binary, Fraction,Drill,Thread, Millimeter
Donated by Bruce Chelf of Porter, Indiana
3.72MB PDF

Cal-Co Patent Circular Slide Rule
ISRM 13.08.11.01

Photos of Francis Donchi, with European Ford Capri, and with grandson Nicolai Donchi, la Brianza, Italy. Cal-Co Patent Circular Slide Rule
Made in Italy. Outer stator disk is 6.5 cm [2.6 inch], inner disk is 5.5 cm.
Country of origin based on 'SIN' being printed as 'SEN'
and metric HP conversion gauge mark of '736'.
Note: Appears to be painted/silkcreen on aluminum disks with brass hub. c1940
Front Scales: C ( D, A, K )
Back Scales: L, SEN 1, SEN 2, TG
Note: Concentric Sine scales
Donated by Nicolai Donchi, Monza, Italy in memory of his Grandfather Francis Donchi.
This artifact was found in the house of his Grandparents. and was owned by his Grandfather. Francis Donchi (1917-1993). Born in August 17, 1917 in Paina Brianza in Lombardy (Italy) where he finished elementary school and for the next 7 years, helped his father, Francesco, in the fields. At 18 he started working in a textile company on the banks of the River Lambro (Monza river) living modestly. At age 22 he was drafted into the Italian Army where he served with honor for 4 years from 1939 to 1943. After WWII he met his wife, who was a girl from his own village. Francis received a 'gratitude of war' after a few years for a lung disease due to breathing the toxic smoke created by the war industries. Though partially invalid he began a quiet life in Carate Brianza (Lombardy) and to have a child that carries on the family name. Francis had a second job restoring furniture in his house, which had many tools of the trade and where this slide rule was discovered after his death at age 76.

REF Latt-Mayer S.A. 42-8125 Circular Slide RuleLatt-Mayer S.A. 42-8125 Circular Slide Rule
Made by Latt-Mayer S.A., Rio De Janeiro. Approximately 5cm in diameter.
Front Scale
C (D)
Back: Promotion of Latt-Mayer product line (Portugese)
Archive - Photo by João Roberto Gabbardo collection, Brazil
Pickett 101-C Dial Rule - 10.2cm dia (1962)
Made in USA - c1962
Front Scale: C, CI, A, AF, L, FA, LL2, LL1, DS, DT, M
Back Scale: C, S, ST, T, Fractions-Decimal
Donated by Mike Medlock, Greenwood, Indiana
As Mike prepared to enter Purdue in 1962, his brother Allen was completing his B.S. in Mathematics - also at Purdue. His brother decided a great gift for his younger brother as he began his college career would be a slide rule. Just to be different he decided to purchase a circular slide rule, certainly a oddity at the time. Mike used the slide rule throughout his college career and was amused by the odd looks from fellow engineering students. He graduated with a B.S. Chem. Eng. from Purdue University 1967. Pickett 101-C Dial Rule - 10.2cm dia (c1964)
Made in USA, Aluminum disk with 3 plastic cursors
Front Scale: C, CI, A, AF, L, FA, LL2, LL1, DS, DT, M
Back Scale: C, S, ST, T, Fractions-Decimal
Note: Scale Labels embossed in RED on transparent cursor
Owned and donated by Ann Kilby, Kingston, Washington.
Ann's parents were scientists at Livermore Labs so she was competent with slide rules at an early age. She used this one while in high school and during her first few years at college. Her university education led her down paths of Zoology, Secondary-education, Physical chemistry, Sinology and Psychotherapy, culminating in a profession of healing arts and counseling.
Expanded Family Biography of Wallace and Ruth Kane and daughter Ann Kilby (7.09MB)

C05 Pickett 103-ES Mark-Up CalculatorPickett 103-ES Mark-Up Calculator - 10.2cm dia
Made in USA
Front Scale:
C, CI, A, AF, L, FA, fraction-decimal
Back Scale
Quantity, Cost Basis, Selling Price (mark up)


REF Pickett 104-C Profit CalculatorPickett 104-C Profit Calculator - 20.3cm dia
Made in TBD
Front Scales:
% of Margin of Profit on Selling Price
% of Profit Mark-Up from Cost Price
[List Price]
% of Discount from List Price
Back: blank
Archive - Ted White Collection


REF Pickett 105-C Profit CalculatorPickett 105-C Profit Calculator - 9.9cm dia
Made in TBD
Front Scales: % of Margin of Profit on Selling Price
% of Profit Mark-Up from Cost Price
[List Price]
% of Discount from List Price
Back: blank
Archive - Ted White Collection


REF Pickett 106-C Proportional ScalePickett 106-C Proportional Scale - 14.6cm dia
Made in TBD
Front Scales: Reproduction Size
[Original Size]
Percentage of Original Size
Number of Times Reduced
Back: blank
Archive - Ted White Collection


C14 Pickett 107-ESPickett 107-ES - 8cm dia
Made in Japan
Front Scale:  [ L, CI, C] D, A, K
Back Scale: Equivalents


REF Pickett 108-ESPickett 108-ES - 8cm dia
Made in Japan
Front Scale:  K, A, D [ C CI L ]
Back Scale:  D, T, S, T, S, T, TS
Archive - Ted White Collection


ISRM - Pickett 109-ESPickett 109-ES - 10.8cm dia
Made in Japan
Front Scale : K, A, D, [ C, CI, EI(spiral)]
Back Scale: L, DI, D, T, S, T, S, T, TS



REF Pickett 110-ESPickett 110-ES - 12.8cm dia
Made in Japan
Front Scale : LL3, LL2, LL1, LL0, K, A, D [ C, CI, B, EI (spiral)]
Back Scale: D(spiral), D, V2 [ V1, C(spiral), G, T, S, T, S, T, TS, L ]
Archive - Ted White Collection


REF Pickett 111-ESPickett 111-ES - 12.8cm  dia
Made in Japan
Front Scale: LL3, LL2, LL1, LL0, K, A, D [ C, CI, EI (spiral) ]
Back Scale: /LL3, /LL2, /LL1, /LL0, L, DI, D, T, S, T, S, T, TS
Archive - Ted White Collection


Pickett 112C Metric Converter (4 base disks)
ISRM 18.09.17.42Pickett 112C Metric Converter (4 disks)
Made in USA - 15.2cm dia
All with C&D scales, including conversions for:
Orange Disk - Linear measure
Maroon  Disk - Dry measure
Yellow Disk - Liquid measure
Blue Disk - Weight measure
Gift of Donald Bachelor Collection


REF Aristo 0602 (1972)Aristo 0602 (1972)
Made in Germany
Front Scale
A ( B, -50%/+100%(Mark-Up) )
Back: TBD
Archive - Wenzel Collection


REF Aristo 622 (1970)Aristo 622 (1970)
Made in Germany
Front Scale
K, D, A,( B, CI )
Back: TBD
Archive - Wenzel Collection


REF Aristo Commerz 623Aristo Commerz 623
Made in Germany
Front Scale
English-Metric Conversions, A( B, CI, -50%/+100%(Mark-Up) )
Back: TBD
Archive - Wenzel Collection


REF Faber-Castell 8/10 12.3cm diaFaber-Castell 8/10 12.3cm Dia
Made in Germany
Front Scale
K, A, L, D ( C, CI, B, T1, T2, S, S )
Back: Instructions on Use
Multilined Cursor: KW, (3)PS, (2)q
Archive - Rod Lovett Collection


REF US Army Signal Corps Psychrometric Calculator ML-322/UMUS Army Signal Corps Psychrometric Calculator ML-322/UM
Made in USA by Virginia Plak Company 1944
Front Scale: DP, VP, C2, C1, t' ( t-t', P, THETA)
Back Scale: DP, VP, C2, C1, t' ( t-t', P, THETA)

Original Owner: John Vincent Atanasoff, (1903-1995) Father of the First Digital Computer, used while in the service during WWII. This scan of one of his three slide rules on display in the ISRM galleries that were provided by the Iowa State University Library, Atanasoff Archives. See also his model K&E N4080-3 S/N 798671 for an expanded biography


REF Cox Stadia ComputerCox Stadia Computer
Made in USA by Perrygraf - design by W. & L.E. Gurley
Front Scale: Difference of Elevation, Horizontal Difference
Archive - Not in Collection


REF Hemmi 1001 Circular Slide RuleHemmi 1001 Circular Slide Rule
Made in Japan by Sun Hemmi
Front Scale
A, D( C, CI, B )
Back: TBD
Archive - Not in Collection


REF Norton & Gregory Roto-Rule 3.5" diaNorton & Gregory Roto-Rule - 3.5 inch dia
Made in England - Norton & Gregory, London -Pat Feb-12-1907
Front Scale : A, C, D, L
Archive - Not in Collection
Instruction Sheet 121Kb


C26 Multor Currency Exchange C26 Multor Currency Exchange
Made in WestGermany - 3 color metal 8.8cm disk
Front Scale
D (C, A )
1.17Mb


REF Controller Circular Slide Rule 75mm Diameter
Controller Circular Slide Rule 75mm Diameter
Made in Munich, West Germany, bu Controller Calculator KG, DGRM, c1959
Front Scale
C ( D, A, K)
Back - Conversions
Archive - Scan Donated by Rod Lovett Collection.
Instructions, 1965-66 (German) (4.82MB PDF)


Controller Circular Slide Rule 75mm Diameter 1970
ISRM 13.03.15.02 Controller Circular Slide Rule 75mm Diameter 1970
Made in Munich, West Germany, bu Controller Calculator KG, DGRM, 1970
Front Scale
C ( D, A, K)
Back - Conversions
Warranty Number: 705/3433R
Instructions, 1970 (German) (6.2MB PDF)


REF Controller 110R Circular Slide Rule 110mm Diameter
Controller 110R Circular Slide Rule 110mm Diameter
Made in Munich, West Germany, bu Controller Calculator KG, DGRM, c1961
Front Scale
C ( D, A, K)
Back - Conversions
Archive - Scan Donated by Giovanna Breda Collection.


REF Controller 110R Circular Slide Rule Version 2 110mm Diameter
Controller 110R Circular Slide Rule Version 2 110mm Diameter
Made in Munich, West Germany, by Controller Calculator KG, DGRM, c1961
Front Scale
C ( D, A, K)
Back - Conversions
Archive - Scan Donated by Giovanna Breda Collection.


Controller 110R Circular Slide Rule Version 3 110mm Diameter
ISRM 13.03.15.03 Controller 110R Circular Slide Rule Version 3 110mm Diameter
Made in Munich, West Germany, by Controller Calculator KG, DGRM, 1970
Front Scale
C ( D, A, K)
Back - Conversions
Warranty Number: 705/5433Y
Instructions, 1970 (German) (6.2MB PDF)


REF Controller 200R Circular Slide Rule 220mm Diameter
Controller 200R Circular Slide Rule 220mm Diameter
Made in Munich, West Germany, by Controller Calculator KG, DGRM, c1961
Front Scale
C ( D, A, K)
Back - Conversions
Archive - Hermann's Slide Rule Catalogue.


ISRM Circhlow Circular Slide RuleCirchlow Slide Rule
12in (25cm) Dia Cardboard disc - crude construction
Front Scale
A(1/sinA), B(1/cosA), C(Tan Cot), D(1/sin), E, F(Squares)
Solutions of Triangles
Per Brian Bourchers: This design was developed for the US Army coastal artillery in the pre WWII period. Notice that the outer scale goes to 6400 as there are 6400 mils in a circle under the military system.



C22 Emeloid - Proportional Reproduction Size FinderEmeloid - Proportional Reproduction Size Finder
Made by Emeloid Operations, Hillside, NJ
6in (15cm) Dia Plastic Film disc
Front Scale
Reproduction Size ( Size of Original) % of Original Size, # times reduced )
Donated by Jack Rababeh, Senior Engineer at ASC

C23 Graphic - Percentage CalculatorGraphic - Percentage Calculator
Made by Graphic Calculator Co., Barrington, Illinois - 1962
6in (15cm) Dia Plastic Film disc
Front Scale
Sales ( % of Sales) or Number ( Percent )
Donated by Jack Rababeh, Senior Engineer at ASC

C25 Graphic - Profit FinderGraphic - Profit Finder
Made by Graphic Calculator Co., Chicago, Illinois - 1954
8in (20.2cm) Dia Plastic Film disc
Front Scale
# of Items, Selling Price ( Markup, Profit )
Donated by Jack Rababeh, Senior Engineer at ASC

REF Ahrend Construction Disk Ahrend Construction Disk
Made in Netherlands by Ahrend
Archive - Herman van Herwijnen's SR Catalogue


C24 Watham - Profit FinderWatham - Profit Finder
Made by Watham of Chicago - 1962
5-1/2in (14cm) Dia cardboard disc
Front Scale
# of Items, Selling Price ( Markup, Profit )
Donated by Jack Rababeh, Senior Engineer at ASC

Gong Se He Ying - Metalworking
ISRM 21.03.13.36Gong Se He Ying - Metalworking calculator for Iron materials
Made in China by Sheyang DALI Metal Factory
Front Scale
degree, meter, quantity, kilogram (Steel. Iron, cast, ball, flat steel, flat iron, flat cast)
Back Scale
SG, A [ B, T Cot, ST, Sin Cos ] D, DI


REF Chadwick #7285 Computer-LighterChadwick #7285 Computer-Lighter
Made in Japan - includes a cigarette lighter and key fob
Front Scale
Aviation Scales, Mikes, Ground Speed, etc
Back Scales: Daylight hours Calender
Scans donated by Clay Castleberry
Jpeg 304KB

REF Educational Instruments Corona 1 Educational Instruments Corona 1 - c1965
Made in USA by Educational Instruments, Inc - 9cm Diam plastic
Front Scale:
C, D, R (= DI), A, K, L, S, T, ST
Back:
The back, which has a window to the front disk for more surface area for equations, contains a mine of information. 112 formulae; 2 trig tables, 41 conversion factors 6 series expansions, 2 numerical integration formulae 13 numerical constants, 72 integrals, 36 differentials
Archive - Scan provided by Rod Lovette (UK) Collection


REF Radiac Nuclear Yield Calculator Set ABC-M28A1 - Disk One

REF Radiac Nuclear Yield Calculator Set ABC-M28A1 - Disk TwoRadiac Nuclear Yield Calculator Set ABC-M28A1
Made in USA - NATO number NSN6665-00-130-3616, 4-1/2in Dia. plastic
Scales:
TIME OF ENTRY, ENTRY-EXIT TIME AFTER BURST, DOSE-RATE (RADS/HOUR), DOSE (RADS), TRANSMISSION FACTORS, YIELD-STABILIZED CLOUD BOTTOM (KT), STABILIZED CLOUD BOTTOM OR TOP OF ELEVATION ANGLE, ALIGN FLASH-TO-BANG TIME WITH ELEVATION ANGLE, READ YIELD ON APPROPRIATE SCALE UNDER POINTER, DISTANCE TO GROUND ZERO (KM), FLASH-TO-BANG TIME (SECONDS), YIELD FROM ILLUMINATION TIME, FIREBALL ILLUMINATION TIME (SECONDS).

Carrying sleeve, sample problem card
Archive - BajaRon photos placed on ebay


Lufkin Screw Thread Tap Drill Chart
ISRM 18.07.18.01Lufkin Screw Thread Tap Drill Chart
Made in USA by Lufkin Rule Co. ©1935
Front Scale
National Coarse (size of Tap, Threads per Inch, Size of Tap Drill)
Back Scales: Screw Threads and tap drill sizes


Hutchinson Calculator No2 Gas Flow in Tubing
ISRM 18.03.20.14Hutchinson Calculator No2 Gas Flow in Tubing 1956
Made in USA by Robert M. Hutchinson, Houston, Texas. Formulae by Mueller Co. Decatur, Illinos
Note: This is a 10" x 10" 6 page folder with instructions and a table.
Front Scale
D:Inches of Water, A:Cu.Ft.per Hour ( C:Length in feet, B:High Pressure, B':High Pressure, B:Low Pressure, B':Low Pressure, ) Cursor:Dividing Scale
Belonged to Robert N. Curry. Gifted by his friend Alice Bowling of Louisville, Kentucky.

Robert N. Curry was a 1949 graduate of Western Kentucky University. Bob was the head of Measurement for Texas Gas Transmission Corp and authored a book on Natural Gas processing Fundementals of Natural Gas Conditioning. He was former chairman of the AGA Transmission Measurement Committee. Several of his slide rules are currently in the ISRM galleries.

Sours: https://www.sliderulemuseum.com/Circular.htm
The iPhone of Slide Rules - Numberphile

Soviet KL-1 Pocket Watch Slide Rule 

Hemmi 32 Four-Inch
Vest Pocket Mannheim Slide Rule


   Click on picture to enlarge.

Four-inch closed-body bamboo slide rule with  magnifying cursor.   Scales are A [B, CI, C] D and [S, L, T] plus a 10-cm measuring scale on the top edge.    Complete, brand new package includes slide rule, brown leather sheath, 40-page factory instruction book, and shelf box.

Rule, case and box are brand new, factory perfect; instruction book has remnant of retail label on front cover, otherwise perfect.

Brand New

Includes
Box, 
Slide Rule,
Leather Case,
Factory Instructions.

Price
$88.

.
 Hemmi 257L Chemistry Slide Rule

Click on picture to enlarge.
Ten-inch duplex bamboo slide rule for chemists and chemical engineers.  Front scales (L, K, A, DF [CF, CIF, CI, C] D, LL3, LL2, LL1) are designed for efficient multiplication, division and exponentiation. Rear scales (Ch A-M, Ch N-Z, M1 [M2, ToF, ToC, ToK, LM]  mmHg, Kg/cm2, in hg Vac, tw) are designed for calculations involving molecular weight, temperature and pressure.  For example, the first two scales constitute a table of molecular weights;  setting the hairline on "H2O" automatically places the hairline on 18.3 (the molecular weight of water) on the D scale.  There are other scales which you can figure out since it comes with an instruction manual.  Complete with brown leather Hemmi flip-top case. 

Small ODELCO trademark on front of rule plus "HEMMI JAPAN NO. 257L" on back.  Frederick Post model 1491 Chemistry Rule was an earlier version of this rule. 

Rule is unused and still sealed in factory plastic.  Case is perfect.  Instructions are a photocopy of the original manual.

 Brand New
 

Includes
Slide Rule, 
Leather Case,
Instruction Manual.
 

Price
$388.

.
Hemmi 259D Mechanical Engineering Slide Rule

Click on picture to enlarge.
Final edition of the Hemmi 159/259/259D expert mechanical engineering slide rule.  Scales are LL/1, LL/2, LL/3, DF [CF, CIF, CI, C]  D, LL3, LL2, LL1 and L, K, A [B, T, S, ST, C]  D, DI, LL0, LL/0.   A beautiful bamboo duplex rule, still sealed in original plastic.  

Complete with factory leather case and 49-page factory instruction manual in English.   



Brand New

Includes
Slide Rule, Factory Leather Case and Factory  Instruction manual.    

$220.
SOLD

.
 Hemmi 260 Advanced Engineering Slide Rule

Click on picture to enlarge.

Incredibly sophisticated bamboo duplex slide rule with a three-hairline cursor and 25 scales including LL/1, LL/2, LL/3, DF [CF, CIF, CI, C]  D, LL3, LL2, LL1 and LL/0, LL0, K, A [B, T, S, ST, C]  D, DI, P, L.  Complete with 49-page factory Instruction Manual and brown leather Hemmi case. Rule is marked "Hemmi No. 260" and "ODELCO;" case and instructions carry only the Hemmi name.
 Brand new, unused and sealed in original factory plastic.

Includes
Slide Rule,
Leather Case,
Instruction Manual.

$280

.
Teledyne-Post 1422 / Hemmi P262 Advanced Engineer (Rietz) Duplex
 

Click on picture to enlarge.

An all-plastic duplex slide rule based on the "Rietz" scale set.  Scales are LL01, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2, LL1 and K, A, R1, R2 [T2, T1, ST, S, C] D, L, LL00, LL0.  Very advanced construction with 5 mm thick plastic body, no end brackets on face of rule, and end brackets on rear that hold the cursor away from your desktop.  Complete with plastic blow-molded case and shelf box.   No Instruction manual.

Rule is dual marked: "SUN HEMMI JAPAN NO. P262" on left end and "TELEDYNE POST NO. 1422" om right end.

 Display picture at the top of this listing shows a different but identical rule with plastic removed.

Box shows minor shelf wear; rule is still in factory plastic.   

Brand new, unused and sealed in original factory plastic.

Includes
Slide Rule,
Plastic Case, 
Shelf Box.
$140.
Sold

.
Hemmi 269 Civil Engineering Slide Rule

Click on picture to enlarge.



Brand new, unused and in original factory plastic.  Ten-inch bamboo duplex slide rule with 25 scales for the Expert Civil Engineer: L, F, K, A [B, K', CI, C]  D, LL3, LL2, LL1 and CL, SL, M, TL [R, ST, T, S, C]  D, DI, SinCos(1), SinCos(2).  Complete with brown Hemmi leather case and 57-page factory-printed instruction manual.  Rule is marked "Hemmi No. 269" in navy and "Civil" in bright red plus small ODELCO brand mark.

Rule is unused and still sealed in factory plastic.  Case is perfect. 

Brand New

Includes
Slide Rule,
Leather Case,
Instruction Manual.


$267

.

Hemmi Cardiothoracic Slide Rule


Click on picture to enlarge.
Special purpose slide rule made by Hemmi ca 2000.  Transparent top scale (0-32 cm) is for taking measurements directly from x-rays or other medical images.  Bottom consists of a simple all-plastic slide rule for calculating various ratios.  Overall size: 4.25 x 31 inches.  Labels are in Japanese.

Brand new in black vinyl sheath with factory original instructions.  (Single page in Japanese.)     


Indispensable for Japanese radiologists.  

New

Includes
Slide Rule, 
Sheath.

Price
 $25

Sours: http://srtco.us/SlideRuleTradingCo/Rules.htm

Sale circular slide rules for

.

CIRCULAR SLIDE RULE

.

You will also like:

.



521 522 523 524 525