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United Kingdom British Slide Rules

England was the home of John Napier (1550-1617), Edmund Gunter (1581-1626), William Oughtred (1575-1660), and many others, giving the British the credit for kicking off the development of the wide use of slide rules and calculators based on logarithims. This gallery shows British based manufacturers and distributors in the United Kingdom that do not have their own gallery. More British slide rules may be found in: Blundell-Harling (BRL);Pocket Watches; Rarities; PIC/Thornton; Unique. Note that Jakar Slide Rules made by Fuji intended for the British market are shown in the MiscJapan Gallery.
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Albert John Anido



The Anido Slide Rule (1923)
ISRM 13.02.20.02


British Patent GB195286 Figure 1 & 2

The Anido Slide Rule (1923)
Designed by Albert John Anido (1883-1949), of 69 Earls Court, London, England
Patent: GB 195,286 March 29, 1923
Note: Railroad track type divisions. Has Special Plus and Minus Log scales used for Constants Conversions.
Note: 2: Peter M. Hopp has a reference in his book that eludes to Albert Nestler making slide rules for Anido c1938.
Front Scale: 10in (10ths) // +L, A [ B, C ] D, -L \\ 25cm
Back Scale: [ Constants Conversions, LE, T ]
Well (using beveled end of slide as indicator): [ Sines, Cos ]
Gift of Dick Rose, owner of Rose Vintage Instruments, Ohio

Albert John Anido (ca1890)


Albert John & Ernestine Regina Anido (ca1900)

Known history: Albert John Anido was Born in Montevideo, Uruguay (1883). He had a sister, Ernestine Regina Anido (1879-1948) and brother William Nicholas Anido (1881-1914). Mentioned as an elected student in the Journal of the Institution of Electrical Engineers, Volume 40 (1907-1908) page 411. Graduated B.SC.(Eng) at the University of London in 1909. Married to Nellie Helen Blanch Forsdyke. They had a son, John David Forsdyke Anido (1916-2001). The 1914-1919 Jerseymen roll of service includes an Albert John Anido of military age who fought in the First World War and the 21 March 1916 London Gazette lists the London Electrical Engineers: Corporal Albert John Anido to be Second Lieutenant (on probation) working with the anti-aircraft corps. A later record in the London Times shows an Albert John Anido (sn 73845) as being a pilot in training in 1941, but he would have been 58 by then, so this must be some other relation. The 1939 London Gazette shows that he died atFlat 6, Eaton Hall, 15, Eaton Gardens, Hove, Sussex, 22nd January, 1949 and his last profesion as being an Engineering Tutor. Besides his slide rule patent, Albert Anido obtained GB 260,497 Indicating ringing of bells to operators in 1926.

Bendix Limited
Bendix Limited Slide Rule
ISRM 20.04.01.294
 Bendix Limited Slide Rule
Made in England.(Unknown maker) - G.E Petty
Front Scale: 13cm // A [ B, C ] D
Back scale: 5inch [ blank ]
.

Boots Ringplan



S349 Boots Ringplan (Mannhiem)		 Boots Ringplan (Mannhiem)
Made in Japan for Boots Ringplan Pharmacy Chain
Front Scale
25cm, A [ B, CI, C ] D, K
Back Scale: [ S, L, T ]
Original Owner/Location: Unk/England
Manual 8.48Mb


Boots Ringplan Precision Log Log
ISRM 20.02.09.03		 Boots Ringplan Precision Log Log
Made in Japan for Boots Ringplan Pharmacy Chain
Front Scale
LL3, LL2, LL1, A [ B, BI, CI, C ] D, DI, K, LL0
Back Scale: [ T2, T1, L, S ]
Original Owner/Location: Ruth Stanier/England

Instructions (1.95MB PDF)


Boots Ringplan Duplex Log Log
REF		 Boots Ringplan Duplex Log Log
Made in Germany for Boots Ringplan Pharmacy Chain
Front Scale
L, K, A [ B, CI, C ] D, LL1, LL2, LL3
Back Scale: T1 Cot1, T2 Cot2, DF [ CF, CIF, CI, C ] D, S Cos, ST, P
Photo contributed by Rod Lovett Collection


Boots Ringplan Standard
REF S294		 Boots Ringplan Standard
Made in Japan for Boots Ringplan Pharmacy Chain
Front Scale
25cm // A [ B, CI, C ] D, K \\ 10in
Back Scale: [ S, L, T ]


Boots Ringplan 13cm 5in Standard pocket
ISRM 20.04.01.335		 Boots Ringplan 13cm 5in Standard pocket
Made in Japan for Boots Ringplan Pharmacy Chain.
Note narrow 24mm cursor
Front Scale: 13cm // A [ B, CI, C ] D, K \\ 5in
Back Scale: [ S, L, T ]
Gift Of Philip E. Stanley, Worcester, Mass.


Boots Ringplan 14cm Standard pocket
ISRM 20.04.01.220		 Boots Ringplan 14cm Standard pocket
Made in Germany for Boots Ringplan Pharmacy Chain.
Note: wider 27mm cursor
Front Scale: 14cm // K, A [ B, CI, C ] D, L
Back Scale: [ S, ST, T ]
Gift Of Philip E. Stanley, Worcester, Mass.


Boots Ringplan 15cm Precision Log Log pocket
ISRM 20.04.01.253		 Boots Ringplan 15cm Precision Log Log pocket
Made in Japan for Boots Ringplan Pharmacy Chain.
Note:30mm wide cursor
Front Scale: 15cm // LL3, LL2, K, A [ B, CI, C ] D, K, LL1
Back Scale: [ S, ST, T ]
Gift Of Philip E. Stanley, Worcester, Mass.

British Slide Rule Co

The British Slide Rule Co, was a subsidiary of Marine & Overseas and also made slide rules for Technical Standard.



REF British Slide Rule Co - The Supreme 		British Slide Rule Co - The Supreme
Made in England
Front Scale
10 in // M, S, A [ B, CR, C ] D, T, N \\ 27 cm
Back Scale
Equivalents Tables
Note: CR is usually shown as C1 or R. M & N are usually denoted LU & LL or LL2 & LL3.
Photo contributed by Dave Riches Collection

Classic Brand Slide Rules

Referencing Peter Hopp, "Slide Rules, Their History, Models and Makers" "Classic" slide rules were manufactured by L&C Hardtmuth, one of the world's oldest manufacturers and suppliers of Pencils, not to mention the second largest company in Europe. It later became Koh-i-noor.


P217 Classic Series 1 Pocket		 Classic Series 1 Pocket
Made in England
Front Scale
5inch // A [ B, C ] D || 13cm
Back: Conversions
Original Owner/Location:Unk/England


S270 Classic Series 1		 Classic Series 1
Made in England
Front Scale
10inch // A [ B, C ] D || 26cm
Back: Conversions
Original Owner/Location:Unk/England


P012 Classic Series II		 Classic Series II
Made in England
Front Scale
5inch // UL, A [ B, C ] D, L || 13cm
Back: Conversions
Original Owner/Location: G. McVittie/England


S425 Classic Log-Log		 Classic Log-Log
Made in England
Front Scale
10inch // UL, A [ B, S, T, C ] D, L || 26cm
Back: Conversions
Original Location: England

S.P. Clemenston
17 Buckingham St., Strand, London, England



Clementson Steam Pipe Sizing Slide Rule
ISRM 14.09.25.02 		Clementson Steam Pipe Sizing Slide Rule
Made in England by S.P. Clementson, 17 Buckingham St., Strand, London, England
Front Scale: Steam Pressure Gauge (Lbs. PER Sq. INS.), Steam Pressure For Velocity Reading [ Pressure Drop, Velocity FT/SEC, LBS/HOUR ] Pipe Diameter, Red Diameters for Velocity Readings
Back: Blank
Gift of Phillip Rodley, Upper Hutt, New Zealand
Phillip Rodley

Dargue Brothers. Ltd. "SIMPLON", Halifax, England

Often mistaken as a maker, SIMPLON was just the company's brand name. This rectilinear range was only produced from 1931 to 1939. The models stand out for their unusual dirty orange/butterscotch colour and on some, an odd multilayered and screwed together construction. Despite the exotic "Sub-Ivory" name they were made from an early form of plastic and the scales were incised/imprinted. The colour suggests the use of Catalin a thermosetting polymer developed by the US Catalin Corporation in 1927. It took years before other makers finally followed Dargue's innovative "UNIFACE" scale layout and realised it was much more convenient for solving general arithmetic-based problems to have trigonometric scales on the front face of the stock. Description by Rod Lovett
Simplon SR-1 Mannheim 5 inch
Got a scan or a specimen to donate?
Simplon SR-2 Mannheim 5 inch
Got a scan or a specimen to donate?
Simplon SR-3 Uniface 5 inch
Got a scan or a specimen to donate?
Simplon SR-4 Student Mannheim 10 inch
Got a scan or a specimen to donate?
Simplon SR-5 Uniface 10 inch
Got a scan or a specimen to donate?
Simplon SR-6 Enhanced Mannheim 10 inch
Got a scan or a specimen to donate?


S491 Simplon Primary		 Simplon Primary
Made in England
Front Scale: LU, A [ B, CI, C ] D, LL
Back: Equivalents
Original Owner/Location: Unk/Chinoor, England


P208 Simplon Bilateral S-B-5		 Simplon Bilateral S-B-5
Made in England - Pat Pending
Front Scale: A [ B, C ] D
Back: Scales: A, Sine(S), Log(L), Tan(T), D
Reversible bilateral cursor


Simplon Primary LogLog Slide Rule
ISRM 17.05.02.34		 Simplon Primary LogLog Slide Rule
Made in England
Front Scale: LU, A [ B, CI, C ] D, LL
Back: Equivalents
Gifted by Mike Weaver, UK


Simplon Bilateral (Log Log)
ISRM 18.07.11.03		 Simplon Bilateral (Log Log)
Made in England - Pat 413308
Front Scale: LU, A [ B, CI, C ] D, LL
Back Scale: A, Sine, Log, Tan, D
Reversible (bilateral cursor)
Gifted by Phil Stanley of Worcster, Massachussettes
Philip Stanley retired from engineering to become a full-time dealer in and appraiser of antique scientific instruments and tools as The Analytical Engine. He has written two books on antique measuring instruments, and numerous articles on instruments and technology, and has given several talks on these subjects. Phil appeared on the Antiques Road Show on PBS, as an appraiser, in 2012, 2013, 2014.


Simplon SR-10 Bilateral (Rietz System)
REF S390		 Simplon SR-10 Bilateral (Rietz System)
Made in England - Pat 413308
Front Scale (extended)
D3, A [ B, C ] D, L
Back Scale A, Sine(S), Log(L), Tan(T), D
Reversible (bilateral) cursor
Original Owner: E.C. Evans/ England


Simplon SR-10 Bilateral (Rietz System)
REF S399		 Simplon SR-10 Bilateral (Rietz System)
Made in England - Pat 413308
Front Scale (extended)
D3, A [ B, C ] D, L
Back Scale A, Sine(S), Log(L), Tan(T), D
Reversible (bilateral) cursor


REF Simplon XL-10 (Log Log) Bilateral		 Simplon XL-10 (Log Log) Bilateral
Made in England - Pat 413308
Front Scale (extended)
LU, A [ B, CI, C ] D, LL
Back Scale A, Sine(S), Log(L), Tan(T), D
Reversible (bilateral) cursor
Archive - Rod Lovett Collection, UK


REF Simplon Electro Log Log		 Simplon Electro Log Log
Made in England - Pat 413308
Front Scale (extended): LU, A(Kw) [ B(Hp), CI, C ] D, LL
Well: Dynamo (Motor), Volt
Back Scale: Log, D
Back of Slide: A, Sine(S), Tan(T), D
Reversible (bilateral) cursor
Archive - Cyril Catt Collection, Australia


Simplon "Primary", "Bilateral", "Major" Slide rule Instructions (1.6MB PDF)

Simplon Special Marks on Slide rule

English Electric Co. Ltd, Strand. London, England 1918-1959

In 1918 the English Electric Company Limited (EE) was a British industrial manufacturer formed after the armistice of World War I by amalgamating five businesses which, during the war, had been making munitions, armaments and aeroplanes. It initially specialised in industrial electric motors and transformers, railway locomotives and traction equipment, diesel motors and steam turbines. Its activities were later expanded to include consumer electronics, nuclear reactors, guided missiles, military aircraft and mainframe computers. In 1959 the company became English Electric Aviation Ltd. Two English Electric aircraft designs became landmarks in British aeronautical engineering; the Canberra or B-57, and the Lightning. In 1960, English Electric Aircraft (40%) merged with Vickers (40%) and Bristol (20%) to form British Aircraft Corporation. Ref: Wikipedia


English Electric Co Ltd 1918-59 		English Electric Co Ltd 1918-59
Made in England.
Note: Pat. ApplN. 30421/38
Front Scale: A [ B, C ] D
Back: [ B1, C1 ] (need to reverse slide)
Gift of Philip Stanley Collection

Theodore Farmar
100 Station Approach Road, Ramsgate, Kent, England



Farmar's Profit-Calculating Rule 		Farmar's Profit-Calculating Rule
Made in England - Business Slide rule
Roller:
Slide:
Archive - Scan by Nathan Zeldes, Israel.
Helix and Regal Slide Rule Series Model Numbers
Helix LogLog U02
ISRM 20.04.01.334		 Helix LogLog U02
Made in Japan for Helix Works, Stourbridge, Worcestershire, England.
Front Scale
S, K, A [ B, CI, C ] D, L. T
Back: Blank
Gifted by Philip Stanley Collection


Helix LogLog U07
ISRM 17.05.02.54		 Helix LogLog U07
Made in England by Helix Works, Stourbridge, Worcestershire, England.
Front Scale
L, LL2, LL3, A [ B, CI, C ] D, S, T, ST
Back: Blank
Gifted by Mike Weaver, UK


Helix Top Precision A50S
ISRM 17.05.02.54		 Helix Top Precision A50S
Made in Japan for Helix Works, Stourbridge, Worcestershire, England.
Front Scale
K, S, A [ B, CI, C ] D, T, SL
Back: Blank
Gifted by Philip Stanley Collection


Helix Regal A102S
ISRM 12.05.02.02 		Helix Regal A102S
Made in Japan for Helix Works, Stourbridge, Worcestershire, England.
Front Scale
S, K, A [ B, CI, C ] D, L, T
Back: Blank
Acquired out of England
Note: Both the Regal and Hellerman slide rules use the same cursor and may be swapped with each other.
Helix Regal series Instructions (2.1MB pdf).


Hellerman Slide Rules Ltd.


1989 London Gazette Liquidation Notice 		HELLERMAN SLIDE RULES LIMITED
P.O BOX 810, FRIARY COURT
65 CRUTCHED FRIARS,LONDON
EC3N 2NP,UNITED KINGDOM
Incorporated: 19 Jan 1960 by Esmond Hellerman
Dissolved: 1989
Esmond Hellerman imported and distributed slide rules from Japan, Denmark (UTO) and Czechoslovakia (Logarex) as well as numerous other drafting and engineering instruments. The business lasted 29 years.


Hellerman No. 51
ISRM 12.05.02.01 		Hellerman No. 51
Made in Japan
Front Scale
S, K, A [ B, CI, C ] D, L, T
Back: Blank
Acquired out of England
Note: Both the Regal and Hellerman slide rules use the same cursor and may be swapped with each other.

Imperial Chemical Industries (ICI)

Imperial Chemical Industries (ICI) was a British chemical company and was, for much of its history, the largest manufacturer in Britain. It was formed by the merger of leading British chemical companies in 1926. Its headquarters were at Millbank in London.


ICI Arcton Refrigerant Computer
ISRM 18.07.11.15		 ICI Arcton Refrigerant Computer
Made in UK by Imperial Chemical Industries
plastic one-piece stock, plastic film cursor
Front Scale: °F, PSIG: (gage) Arcton 12, (gage) Arcton 22, (absolute) Arcton 12, (absolute) Arcton 22, °C
Back scale: 7in, Boiling Points, Pressure for Refrigerants, 18 cmm 28cm
Gifted by Phil Stanley of Worcster, Massachussettes
Philip Stanley retired from engineering to become a full-time dealer in and appraiser of antique scientific instruments and tools as The Analytical Engine. He has written two books on antique measuring instruments, and numerous articles on instruments and technology, and has given several talks on these subjects. Phil appeared on the Antiques Road Show on PBS, as an appraiser, in 2012, 2013, 2014.

Norton & Gregory Ltd



S537 Norton & Gregory Ltd		 Simplon Primary
Made in Japan for N&G (by ?)
25cm divided scales, extruded aluminum cursor
10in // A [ B, CI, C ] D || 28cm
Well: Extended 60cm scale
Back scale: S, L, T
Back: Equivalents
Original Owner/Location: Unk/ England
Carbic Ltd., London

Cylindrical Pocket Slide Rule with Helical Scales
Scale effective length 66 in (168 cm) with 4 significant figures.

Otis Carter Formby King biography by Susan Richards

Known addresses of Carbic Ltd. (1921-1972):
0: 44 & 66 Bray's Lane, Coventry (1921)
A: "Ashdene," Emscote Road, Stoke, Coventry (1922)
1: 51 Holborn Viaduct, London, EC1 (c1940)
2: 137 Conway Road, London, N14
3: 171 Seymour Place, London, W1
4: 54 Dundonald Rd, London, SW19
(Addresses 0, 1, 3, and 4 are found
on instruction sheets or rules)
Patents
UK patent GB 183,723 (1921)
UK patent GB 207,762 (1922)
UK patent GB 207,856 (1922)
US patent US 1,645,009 (1923)
Canadian patent CA 241986
Canadian patent CA 241076
French patent FR569985
French patent FR576616
German patent DE 418814


Otis King Classification Types
There are 4 principle types, defined by Richard Lyon
A, B, C and D and a B/C Hybrid. See Richard Lyon's Website
Sketch from Colin Barnes article in JOS Vol 4 No 2
Patent UK183723 Issued Aug 3, 1922
Manual 8 Pages
(524Kb PDF)

Known Scale Sets: 409/410, 414/423, 416/417, 422/424, 429/430
Known Models: K, L, N.



REF Otis King Model K Cylindrical (Type A 1921-1923)		 Otis King Model K Cylindrical (Type A)
Made in England - 66 inch scales for multiplication and division
Patents: UK 183723
Serial number:
Scales: 424 and 422
Archive - Ebay Photo
Leather Case


Otis King Model K Cylindrical (Type A 1940)
ISRM 14.01.03.03		 Otis King Model K Cylindrical
Made in England - 24mm Dia. x 260mm Long, 66 inch scales
Patents: UK 183723
Serial number: 5673
Scales: 423 and 414
Snap Case


Otis King Model K Cylindrical (Type C 1960)
ISRM 11.12.29.01		 Otis King Model K Cylindrical
Made in England - 24mm Dia. x 260mm Long, 66 inch scales
Patents: UK 183723
Serial number: V7554
Scales: 423 and 414
Manual PDF 21MB Leather Case


Otis King Model L Cylindrical (Type B 1960)
ISRM 11.12.29.02		 Otis King Model L Cylindrical
Made in England - 24mm Dia. x 260mm Long, 66 inch scales
Patents: UK 183723
Serial number: Z2275
Scales: 429 and 430
Note: Came in Green cardboard box (missing top)

Otis King Type C Model K and L Instructions

F. S. Ratcliffe
Crawford Spring Works, Rochdale, England



Ratcliffe's Spring Calculating Slide Rule
ISRM 13.00.00.72		 Ratcliffe's Spring Calculating Slide Rule
Made in England (Possibly by Unique) - For designing coil springs
Designed by F.S. Ratcliffe for Crawford Spring Works, Rochdale, England
Front Scale: D [d, dc, w ] f, D1 [ d1, R ] N
Note: scales references on this slide rule are not the same as generic scales
Scale explanation: Mean Dia [ Wire dia, Wire dia index, Load ] Stress, Mean Dia [ Wire dia, Spring Rate ] No. of Coils
Cursor Scale: C (spring index)
Back: Instructions (part one)
Well (top): Instructions (part two)
Well (bottom): English equivalents of metric spring wire
2 Page Instructions 2.75Mb

W.F. Stanley & Company - Holborn, London, England

W. F. Stanley and Company, manufacturers of mathematical, drafting and scientific instruments, was founded in 1854 by William Ford Robinson Stanley (1829-1909); it became a limited company (corporation) in 1900. In 1861 Stanley invented a prize-winning straight-line dividing machine that was used to make accurate scales for slide rules and other mathematical instruments. Among the slide rules manufactured and distributed by the Stanley company were the C.T. Cooper slide rule and the Fuller spiral slide rule, designed by George Fuller in 1878.


L09 Stanley London 20inch
Made in England
Front Scale: 20inch // A [ B, CI, C ] D || 50cm
Back Slider: [ S, L, T ] Back: Equivalents


REF Cooper 100 Inch Slide Rule 		Cooper 100 Inch Slide Rule
Made by Stanley, London for C.T. Cooper & Son. Circa 1920
Dimensions: Height 19.5cm Width 24.5 cm Depth 3cm
Material: Polished hardwood fixed with brass screws and with white celluloid (early plastic) calculating scale. The cursor is metal.
Scales: C [D ] 20 segments
Photo from March 2009 Philip Weiss Auction and the National Museum Of American History

Taylor Instruments / TYCOS / Short & Mason, London

George Taylor and David Kendall began making thermometers in 1851. By 1853 George was on his own and in 1872 he formed Taylor Brothers with his brother Frank. They morphed into Taylor Instrument Company in 1907 and began using the trade name Tycos in 1908. The Tycos name was used exclusively until 1932, when the Taylor name was used.

Short & Mason (S&M) was founded in London in 1864 by Thomas Watling Short and William James Mason. They were makers of barometers, anemometers and compasses. Taylor Brothers acquired Short & Mason in 1900 and Taylor marketed their made-in-England products in the USA. In 1969 Short & Mason was merged into Taylor Instruments, which was then a subsidiary of Sybron Corporation. Short & Mason must have designed the Hygrorule as the S&M name was on all the slide rules up through the 1972 Taylor catalog.

1961 and 1977 Taylor Instruments catalog pages showing Hygrorules



Short & Mason No. 3805 Hygrorule Humidity Slide Rule
ISRM 20.04.10.241		 Short & Mason No. 3805 Hygrorule Humidity Slide Rule (up to 1977)
Made in England
Front Scale: Sling/Assman curves (Based on Marvin's Tables - USA)
Back Scale (Red): Stevenson Screen (Based on British MET. Office Tables)
Back blank
Gift of Philip Stanley Collection


Taylor No. 1326 Hygrorule Humidity Slide Rule
ISRM 21.06.10.16		 Taylor No. 1326 Hygrorule Humidity Slide Rule (After 1977)
Made in England
Front Scale: Sling/Assman curves (Based on Marvin's Tables - USA)
Back Scale (Red): Stevenson Screen (Based on British MET. Office Tables)
Back blank
Gift of Bob Dehn Collection

Technical Sales Ltd., London

Emblem Series Instructions (19MB)


ISRM Technical Sales 1051 Tutor Emblem Series 		Technical Sales 1051 Tutor Emblem Series
Made in Japan for British Company T.S. (by Uchida Yoko, Co)
Front Scale:
K, DF [ CF, CIF, CI,, C ] D, A
Back: Blank
Cursor: Multiple Hairlines
Donated by Richard Davis, Las Vegas, Nevada

Need Technical Sales 1052 Olympic Emblem Series
 Technical Sales 1052 Olympic Emblem Series
Made in Japan for British Company T.S. (by Uchida Yoko, Co)
Front Scale
L, K, A [ B, CI,, C ] D, S Cos, ST Cos, T Cot,
Back Scale
25 cm [ Blank ] 8 in
Cursor: Multiple Hairlines


ISRM Technical Sales 1053 Olympic LL Emblem Series 		Technical Sales 1053 Olympic LL Emblem Series
Made in Japan for British Company T.S. (by Uchida Yoko, Co)
Front Scale
L, K, A [ B, CI,, C ] D, S Cos, ST Cos, T Cot,
Back Scale
25 cm [ S, LL2, LL3 ] 8 in
Cursor: Multiple Hairlines
Donated by Richard Davis, Las Vegas, Nevada


ISRM Technical Sales 1071 Commercial Emblem Series 		Technical Sales 1071 Commercial Emblem Series
Made in Japan for British Company T.S. (by Uchida Yoko, Co)
Front Scale
F1 [ F2, 1/C, C ] D, Units Conversions
Back Scale: £, s./d.
Cursor: Multiple Hairlines
Donated by Richard Davis, Las Vegas, Nevada TS Emblem 1071 Commercial Instructions (7.46MB pdf).


ISRM Technical Sales 1081 TechLog Emblem Series 		Technical Sales 1081 TechLog Emblem Series
Made in Japan for British Company T.S. (by Uchida Yoko, Co)
Front Scale
LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1
Back Scale
T2, T1, ST, DF [ CF, CIF, CI, C ] D, P, S Cos
Cursor: Multiple Hairlines
Donated by Richard Davis, Las Vegas, Nevada


ISRM Technical Sales 1091 Executive Emblem Series 		Technical Sales 1091 Executive Emblem Series
Made in Japan for British Company T.S. (by Uchida Yoko, Co)
Front Scale
T1, T2, A [ B, BI, CI, C ] D, P, S Cos, ST
Back Scale
LL3, LL2, LL1, DF [ CF, CIF, CI, C ] D, L, K
Cursor: Multiple Hairlines
Donated by Richard Davis, Las Vegas, Nevada

The Technical Slide Rule Company, London



The Technical - Aeronautical Slide Rule (all glass cursor)
ISRM 17.05.02.36		 The Technical - Aeronautical Slide Rule
British Made - Wood with (all glass cursor)
Front Scale (extended)
10inch // M, P, A [ B, P1, CR, C ] D, K, N \\ 27cm
Back Scale: [ S, ST, T ]
Back side windows
Gift of Mike Weaver, United Kingdom


The Technical - Aeronautical Slide Rule
ISRM 14.07.02.01		 The Technical - Aeronautical Slide Rule
British Made - Wood with celluloid cursor frame
Front Scale (extended)
10inch // M, P, A [ B, P1, CR, C ] D, K, N \\ 27cm
Back Scale: [ S, ST, T ]
Back side windows
Gift of Ed Millis, Dallas, Texas


S500 The Technical Standard Slide Rule		 The Technical Standard Slide Rule
British Made - solid celluloid cursor frame
Front Scale (extended)
10inch // M, A [ B, C ] D, N \\ 27cm
Back Scale: [ S, ST, T ]
Back side windows
Original Owner/Location: Unk/England


S240 The Technical Standard Slide Rule		 The Technical Standard Slide Rule
British Made - all glass cursor
Front Scale (extended)
10inch // M, A [ B,  C ] D, N \\ 27cm
Back Scale: [ S, ST, T ]
Back side windows
Original Owner/Location: Unk/England

W. H. Smith & Son



W.H. Smith Simplified Rietz
ISRM 17.05.02.06		 W.H. Smith & Son Simplified Rietz
Made in England (by BRL?)
Front Scale
K, A [ B, CI, C ] D, L
Gift of Mike Weaver, Bridgend, United Kingdom


W.H. Smith Simplified Rietz
ISRM 17.05.02.27		 W.H. Smith & Son Simplified Rietz
Made in England (by BRL?)
Front Scale
K, A [ B, CI, C ] D, L
Gift of Mike Weaver, Bridgend, United Kingdom


W.H. Smith & Son - Log Log Trig
REF		 W.H. Smith & Son - Log Log Trig
Made in England by Blundell Harling for WH Smith
Front Scale:
L, LL2, LL3, A [ B, CI, C ] D, S, T, ST
Back Scale: Blank
Scan provided by the Steve Seale Collection, Nashville, Tennessee


W.H. Smith & Son - Log Log Trig (Version 2)
ISRM 20.02.25.01		 W.H. Smith & Son - Log Log Trig (Version 2)
Made in England by Blundell Harling for WH Smith
Front Scale: K, L, LL2, LL3, A [ B, L, CI, C ] D, S, T, ST
Back Scale: Blank
Gift Of John Hawkins of the UK


W.H. Smith - Jakar 29 Student Log/Log
ISRM 09.01.12.98		 Jakar 29 Student Log/Log
Made in Japan by Fuji for British Market
Front Scale
L, K, A [ B, CI, C ] D, S Cos, ST, T Cot
Back Scale: 25cm [ S, LL2, LL3 ] 10in
Note: WH Smith sleeve and instructions
Donated by David Hecht, Alexandria, VA
Instructions 2.73MB PDF


W.H. Smith A505 Master Duplex
REF		 W.H. Smith A505 Master Duplex
Made in England by Blundell Harling for WH Smith
Front Scale:
LL01, LL02, LL03, A [ B, L, CI, C ] D, LL3, LL2, LL1
Back Scale:
K, P, ST, ST, DF [ CF,CIF, CI, C ] D, T, Cot, S, Cos
Scan provided by the Steve Seale Collection, Nashville, Tennessee

Westechno Ltd. Exmouth, Devon, England



Westec Electronics Slide Rule
ISRM 13.04.26.02		 Westec Electronics Slide Rule
Made in England by B.R.L. (ref P2361) for Westechno. Ltd., Exmouth, Devon, England
Patents: Provisional No.49828
Front Scale
(Lr)H, K, (fx)2π, A [ (Cr)B, S Cos, T Cot, (Lx or Cx)CI, XL or fr) C ] D (XC), L, Ln, ST
Back: Design aids for Reactance, Resonance, Temperature, Ohm's Law, Frequency and Wavelength, Equivalents, etc.
Note: This is the only slide rule, besides those made by Pickett, to have an 'Ln' scale
Gift of Phillip Rodley, Upper Hutt, NZ
Phillip Rodley

Wiljon Technik-Art



Wiljon Technik-Art Log Log Trig
ISRM 09.01.12.99		 Wiljon Technik-Art Log Log Trig
Made in England by Blundell Harling
Front Scale
K, LL2, LL3, A [ B, L, CI, C ] D, S, T, ST
Back: Blank
Donated by David Hecht,Alexandria, VA

Wollaston, William



REF Wollaston Chemical Slide Rule
 Wollaston Chemical Slide Rule
Made in England by William Hyde Jackson Wollaston_
Front Scale: Chemical Equivalents
William Hyde Jackson Wollaston - (1766-1828) United Kingdom. Chemist. Physicist. Physiologist. Practised medicine from 1789-1801. Wollaston became wealthy by developing the first physico-chemical method for processing platinum ore in practical quantities, and in the process of testing the device he discovered the elements palladium (symbol Pd) in 1803 and rhodium (symbol Rh) in 1803. Also known for Camera lucida and Dark lines in the solar spectrum. Developed the Wollaston Slide Rule of Chemical Equivalents in 1814. Made discovery of absorption lines in solar spectrum; 1793 - elected a fellow of the Royal Society (FRS); 1795 - elected a fellow of the Royal College of Physicians; 1802 - The Royal Society awarded him the Copley medal;
Copyright © 2003-
International Slide Rule Museum
Wollaston Chemical Slide Rule
Made in England by William Hyde Jackson Wollaston_
Front Scale: Chemical Equivalents
William Hyde Jackson Wollaston - (1766-1828) United Kingdom. Chemist. Physicist. Physiologist. Practised medicine from 1789-1801. Wollaston became wealthy by developing the first physico-chemical method for processing platinum ore in practical quantities, and in the process of testing the device he discovered the elements palladium (symbol Pd) in 1803 and rhodium (symbol Rh) in 1803. Also known for Camera lucida and Dark lines in the solar spectrum. Developed the Wollaston Slide Rule of Chemical Equivalents in 1814. Made discovery of absorption lines in solar spectrum; 1793 - elected a fellow of the Royal Society (FRS); 1795 - elected a fellow of the Royal College of Physicians; 1802 - The Royal Society awarded him the Copley medal;
Copyright © 2003-
International Slide Rule Museum