British Slide Rules

P146 Blundell-Luton TypeP8	Blundell-Luton TypeP8 (c1947-49) Made in England - Bakelite and paper veneer construction Front Scale A [ B, CI, C ] D Back: Conversions
REF Blundell-Luton TypeP10 Brailsford Sykes (UK)	Blundell-Luton TypeP10 (c1947-49) Made in England Front Scale 6in // Cube (K), A [ B, REC (CI), C ] D, MAN (L) BackScale [ S, S&T, T ] Archive - Owned by Brailsford Sykes. Scan and photo donated by son John Sykes (UK) Brailsford Sykes, born 1926 in Huddersfield, Yorkshire. He joined Brook Motors at age 16 as an apprentice, and subsequently "graduated" with a gold medal in 1946. He became an expert in the theory and practical application of induction motors, and was rapidly promoted to a managerial position in the company, running the Sheffield technical sales office. This was from 1950 to 1974, and the attached photo was probably taken mid-60's at his office desk. You can see the Blundell in his top pocket. He retired from the company (taken over by Hawker Sidley and then amalgamated with Crompton Parkinson) in 1984.
REF Blundell Type G1	Blundell Type G1 (c.1947) Made in England - Blundell's first slide rule model Stock made of black Bakelite with laminated scales Front Scale K, A [ B, Reciprocal(CI), C ] D, L Back : Blank
S367 BRL Students Type-1	BRL Students Type-1 (c.1950's) Made in England - Stock made of Astrolon Note: the BRL text was scratched out of the logo Front Scale K, A [ B, R, C ] D, M Back: Simple instructions Multiple hairlines
S092 Blundell Harling 803	Blundell Harling 803 Made in England Front Scale L, K, A [ B, CI, C ] D, S, T, ST Back: Blank Multiple hairlines Original Owner/Location: NIB/England
S347 Blundell Harling 904 Academy	Blundell Harling 904 Academy Made in England Front Scale ST, A [ B, CI, C ] D, S, T Back Scale: K, L, DF [ CF, CIF, C ] D, LL2, LL3 Multiple hairlines Original Owner/Location: NIB/England Note: (per David M. Riches, UK) This appears to have been made using the school series S143-10 blank which is narrower than the 800 series blank, but still part of the 'Academy' series.
ISRM Blundell Harling S143-20	Blundell Harling S143-20 Made in England Front Scale K, A [ B, CI, C ] D, L Back Scale: Blank Multiple hairlines Donated by David Hecht,Alexandria, VA
S214 BRL G29 - Students Model	Blundell Rules Ltd. G29 Made in England, Luton Beds - Pat. No. 644944 Front Scale (extended) 10in // A [ B, R, C ] D Back Side: [ S1 cos, L, T  ctg ] 26cm Back Adv: The British Inst. Of Engineering Technology
S237 BRL Academy 304 Darmstadt	BRL Academy 304 Darmstadt Made in England - Blundell Rules Ltd. Front Scale L, K, A [ B, CI, C ] D, P, S, T Back Scale: [ L1, L2, L3 ] Original Owner: P. Burt/England, England
S359 Blundell Omega 401 Rietz	Blundell Omega 401 Rietz Made in England Front Scale 11in // K, A [ B, CI, C ] D, L Back Slide: [ S, S&T, T ] Original Owner: D.H. Carpenter, England
ISRM Blundell Omega 405 Basic	Blundell Omega 405 Basic Made in England Front Scale 11in // A [ B, C ] D Back: Blank Donated by David Hecht,Alexandria, VA
ISRM Blundell Omega 602 Log-Log	Blundell Omega 602 Log-Log Made in England Front Scale 6in // LL2, A [ B, CI, C ] D, LL3 Back Slide: [ S, S&T, T ] Donated by David Hecht, Alexandria, VA
P166 Blundell 604 Electro	Blundell 604 Electro (Omega Series) Made in England Front Scale 6in // LL2, A(Kw) [ B, CI, C ] D, LL3 Well: Voltage Drop, Gen Eff/Mot Eff, Gen/Mot Back Slide: [ S, L, T ] Back Adv: Northern Electric Orig Owner: H.A. Ashton
P049 Blundell Omega 606	Blundell Omega 606 Made in England Front Scale 6in // A [ B, CI, C ] D Back Slide: [ S, S&T, T ] Back Adv: Dustraction Ltd. Leicester
ISRM Blundell Harling Classmate 812-1	Blundell Harling Classmate 812-1 Made in England Front Scale S, T, A [ B, CI, C ] D, K, L Back Scale: Blank Multiple hairlines Donated by David Hecht,Alexandria, VA
ISRM Blundell Harling Classmate 813	Blundell Harling Classmate 813 Made in England Front Scale S, T, A [ B, CI, C ] D, K, L Back Scale: Blank Multiple hairlines Donated by David Hecht,Alexandria, VA
REF Blundell Omega 909 Left-handed	Blundell Omega 909 Left-handed Reversed scales (compare with Blundell 606) Made in England (c.1970) Front Scale 6in // A [ B, C, C ] D Back Slide (not verified): [ S, S&T, T ] Archive - Ron Manley collection
REF BRL S100	Blundell Rules Ltd S100 Made in England Front Scale (extended) A [ B, C ] D Back Adv: Pirelli General (tire) Archive - Chris Gillings collection
REF BRL S101	Blundell Rules Ltd S101 Made in England Front Scale (extended) 6in // Cube(K), A [ B, Rec (CI), C ] D Man.(L) Back: Unknown Archive - Peter Owen collection (England)
P155 Donkin S101	Donkin S101 (circa 1977) Made in England by BRL for Donkin and Company Ltd (Marine Steering Eng) Front Scale:  6inch // Cube, A [ B, Rec, C ] D, Man Back: Blank
P022 BRL P19	Blundell Rules Ltd P19 Made in England Front Scale 6inch // A [ B, REC, C ] D Back: 15cm, Adv: Automatic Telephone and Electric Co, Ltd. Original Owner/Location: Unk/England
P007 BRL Advergi	Blundell Rules Ltd Advergi Made in England Front Scale 13cm // A [ B, CI, C ] D, K || 5inch Back Slide: [ S, L, T] Original Owner/Location: Unk/England

British Slide Rule Co

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

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
S432 Boots Ringplan Precision Log Log	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: Unk/England
S294 Boots Ringplan Standard	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 ] Original Owner/Location: Unk/England
P165 Boots Ringplan Standard pocket	Boots Ringplan Standard pocket Made in Japan for Boots Ringplan Pharmacy Chain Front Scale 13cm // A [ B, CI, C ] D, K \\ 5in Back Scale: [ S, L, T ] Original Owner/Location: Unk/England
P235 Boots Ringplan Standard pocket	Boots Ringplan Standard pocket Made in Germany for Boots Ringplan Pharmacy Chain Front Scale 13cm // K, A [ B, CI, C ] D, L \\ 5in Back Scale: [ S, ST, T ] Original Owner/Location: Unk/England

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 According to Peter Hopp, there are 3 principle types, A, B and C 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
ISRM Otis King Model K Cylindrical (Type C 1960)	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 Leather Case
REF Otis King Model K Cylindrical (Type C )	Otis King Model K Cylindrical Made in England - - 24mm Dia. x 260mm Long, 66 inch scales Patents: UK 183723 Serial number: Scales: 414 and 423 Archive - Hermann's Slide Rule Catalogue st ISRM
REF Otis King Model L Cylindrical (Type B )	Otis King Model L Cylindrical Made in England - - 24mm Dia. x 260mm Long, 66 inch scales Patents: UK 183723 Serial number: Scales: 429 and 430 Archive - Hermann's Slide Rule Catalogue at ISRM

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

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.

S282 Jakar 29 Student Log/Log	Jakar 29 Student Log/Log Made in Japan by Fuji for British Market Front Scale L, K, A [ B, CI, C ] D, S, ST, T Back Scale: 25cm [ S, LL2, LL3 ] 10in Original Owner/Location: Unk/England
ISRM Jakar 29 Student Log/Log	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 Donated by David Hecht, Alexandria, VA
S348 Jakar 66 Electro	Jakar 66 Electro Made in Japan by Fuji for British Market Front Scale 10in // K, E (Volt/Dynamo/Motor Efficiency), A(kw) [ B(PS), CI, C ] D, LL3, LL2, L Back Scale: [ S cos, ST, T  cot ] Cursor: Multiple Hairlines Original Owner/Location: Unk/England Manual 8.48Mb
P237 Jakar 523A	Jakar 523A Made in Japan by Fuji for British Market - c1970 Front Scale 13cm // A [ B, CI, C ] D, K, 5in Back Scale:[ S, LL2, LL3 ] Original Owner/Location: Unk/England

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

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

ISRM Ratcliffe's Spring Calculating Slide Rule

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

"SIMPLON"

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
S107 Simplon Bilateral (Log Log)	Simplon Bilateral (Log Log) Made in England - Pat 413308 Front Scale LU, A [ B, CI, C ] D, LL Back: Slide Blank A, Sine, Log, Tan, D Reversible (bilateral cursor) Original Owner/Location: Unk/England
S390 Simplon SR-10 Bilateral (Rietz System)	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
S390 Simplon SR-10 Bilateral (Rietz System)	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

Stanley - London, England

British Slide Rule Co

Technical Sales

REF British Slide Rule Co - The Supreme

British Slide Rule Co - The Supreme Made in England 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 Photo contributed by Dave Riches Collection

REF Technical Sales Emblem Series Olympic LL	Technical Sales Emblem Series Olympic LL 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 Photo contributed by Dave Riches Collection
REF Technical Sales 1081, Emblem Series	Technical Sales 1081, 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 Scan contributed by Rod Lovette Collection, UK
REF Technical Sales 1091, Emblem Series	Technical Sales 1091, 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 Scan contributed by Rod Lovette Collection, UK

Technical Standards

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

Founded in 1880 at 109 Deansgate, Manchester by Alexander George Thornton, the firm grew to become one of the largest manufacturers of drawing instruments and slide rules in Britain. The Precision Instrument Co was taken over in 1901 and PIC continued to be used by Thornton as a trade mark until about 1970. The firm became British Thornton in 1967 and merged with ESF at Burley in 1992. British Thornton is now a manufacturer of school furniture in Keighley.
See more Thornton Slide rules at David Riches' Mathmatical Instruments

REF P.I.C. 131 Magnifier	P.I.C. 131 Magnifier Made in England by A.G.Thornton Note: Cursor accessory for those weak in the eyes.
S424 P.I.C. - I.C.S.- London	P.I.C. - I.C.S.- London Made in England by A.G.Thornton/PIC for I.C.S., London Note cursor design Front Scale (extended) 10in // A [ B, CI, C ] D \\ 27cm Back Scale: { S, L, T ] Back: Equivalents/Material Properties Original Owner/Location: Unk/England
S382 Thornton P.I.C.	Thornton P.I.C. Made in England by A.G.Thornton Front Scale (extended) 10in // A [ B, CI, C ] D \\ 27cm Back Scale: { S, L, T ] Back: Equivalents/Material Properties Original Owner/Location: Unk/England
S278 P.I.C. 101	P.I.C. 101 Made in England by A.G.Thornton - Engine Divided , Pat 411090 Front Scale 27cm // A [ B, ISd/ITd, Td/Sd, C ] D, L \\ 10in Back Slide: Blank Back: Equivalents Multiple hairlines Original Owner/Location: Unk/England
REF A.G. Thornton V.P.15 Pocket	A.G. Thornton V.P.15 Pocket Made in England by A.G.Thornton Front Scale 10cm // A [ B, C ] D \\ 4 inch Back: Unknown Archive - John Sykes Collection (UK)
REF P.I.C. VP-124 Pocket	P.I.C. VP-124 Pocket Made in England by A.G.Thornton - Engine Divided , Pat 411090 Front Scale 5in // LL3, K, A [ B, RC(CI), ISd/ITd + Td/Sd, C ] D, P Cursor: Multiple hairlines Back: Unknown Archive - Chris Gillings Collection
REF P.I.C. 130 Pocket Electro	P.I.C. 130 Pocket Electro Made in England by A.G.Thornton - Engine Divided, Pat 411090 Front Scale 15cm // LL2, LL3, Int + A(Kw) [ B(hp), CI, ISd/ITd, Td/Sd, C ] d + D, K || 5 inch Back Slide: Blank Well: Dynamo-Motor Efficiency, Volt Archive - Atsushi Tomozawa Collection
S376 P.I.C. 131 /PC18 Electro	S376 P.I.C. 131 /PC18 Electro Made in England by A.G.Thornton - Engine Divided, Pat 411090, 754938 Front Scale (extended) 27cm // E1, E2, Int + A(Kw) [ B(hp), R, ISd/ITd, Td/Sd, C ] d + D, ƒ(s) || 10inch Well: Dynamo-Motor η=%, Volt [Note: Plastic slide indicator hairline] Back Slide: Equivalents, Weights of materials 3 Full hairlines Original Owner/Location: S.Kacharya/England
S280 P.I.C. F3649	P.I.C. F3649 Made in England by A.G.Thornton - Engine Divided Front Scale 27cm // LL2, A [ B, CI, C ] D, LL3 \\ 10in Back Slide: [ S, L, T ] Back: Equivelants Original Owner/Location: Unk/England
S269 P.I.C. 3650 Electrical	P.I.C. 3650 Electrical Made in England by A.G.Thornton - Engine Divided Front Scale (extended) 27cm // LL2, A(KW) [ B(HP), CI, C ] D, LL3 \\ 10in Back Slide: [ S, L, T ] Well: Dynamo/Motor%, Volts Multiple hairlines Original Owner/Location: Unk/England
S212 P.I.C. 3654	P.I.C. 3654 Made in England by A.G.Thornton - Engine Divided Front Scale 27cm // A [ B, CI, C ] D \\ 10in Back Slide: [ S, L, T ] Multiple hairlines Original Owner/Location: Unk/England
REF P.I.C. 4457	P.I.C. 4457 Made in England by A.G.Thornton - Engine Divided Front Scale (extended) 13cm // A [ B, RC, C ] D \\ 5in Back Slide: [ S, L, T ] Archive - Tom Dilatush Collection
S041 P.I.C. 221	P.I.C. 221 Made in England by British Thornton Front Scale S, ST, T, A [ B, L, K, C ] D, DI, Ps, Pt Back Scale LL01, LL02, LL03, DF [ CF, CI, ISd/ITd, Td/Sd, C ] D, LL3, LL2, LL1 Multiple hairlines Original Owner/Location: NIB/England
S293 P.I.C. 241	P.I.C. 241 Made in England by British Thornton (overall length 34.5cm) Front Scale LL2, LL3, L, A [ B, CI, ISd/ITd, Td/Sd, C ] D, S, ST, T Back: Blank Original Owner/Location: Unk/England
S276 P.I.C. 271 Log Log	P.I.C. 271 Log Log Made in England by British Thornton Front Scale LL2, LL3, L, A [ B, CI, ISd/Sd, Td/ITd, C ] D, S, ST, T Back: Blank Original Owner/Location: Unk/England
S383 P.I.C. 281 Standard	P.I.C. 281 Standard Made in England by British Thornton Front Scale 25.5cm, K, DF [ CF, CI, C ] D, A, 10in Back: Blank Original Owner/Location: Unk/England
S238 Thornton Manheim	Thornton Manheim - Patent 173660 Made in England - AG Thornton, Manchester Front Scale 25cm // A [ B, C ] D || 10in Back Scale: [ S, L, T ] Well: 21 inch ruler extension Multiple (3) hairlines Original Owner/Location: Unk/England
S098 AA010 Comprehensive	British Thornton AA010 Comprehensive Made in England Front Scale S, ST, T, A [ B, L, K, C ] D, DI, Ps, Pt Back Scale: Blank LL01, LL02, LL03, DF [ CF, CI, ISd/ITd, Td/SD, C ] D, LL3, LL2, LL1 Original Owner/Location: UNK/England
S040 British Thornton AD050 Log Log	British Thornton AD050 Log Log Made in England Front Scale LL2, LL3, L, A [ B, CI, C ] D, S, ST, T Back Scale: Blank Original Owner/Location: UNK/England
REF British Thornton AD060 Standard	British Thornton AD060 Standard Made in England Front Scale 25.5cm, K, DF [ CF, CI, C ] D, A, 10in Back Scale: Blank Archive - Not In collection
S092 British Thornton AD150 Advanced	British Thornton AD150 Advanced Made in England Front Scale LL1, LL2, LL3, A [ B, CI, K, C ] D, S, ST, T Back Scale: Blank Original Owner/Location: UNK/England
S467 British Thornton AD160	British Thornton AD160 Made in England Front Scale K, DF [ CF, CI, C ] D, A Back Scale: Blank Original Owner/Location: D.Wilson/England
REF British Thornton Nautical Speed Rule	British Thornton Nautical Speed Rule Made in England to 0552/1448 standard Front Scale Minutes or D Long [ Sea Miles (Distance) or Knots (Speed) ] Hours-Days (Time) Back Scale Instructions [ Latitude ] Instructions, con't. Archive - Not in Collection

P020 English Mini-Rule	English Mini-Rule Made in England Front Scale A [ B, CI, C ] D, K Back: Blank Original Owner/Location: Unk/England
P013 Unique Universal I	Unique Universal I Made in England Front Scale LU, S, A [ S, R, C ] D, T, LL Back: Blank Original Owner/Location: Unk/England
P009 Unique Log-Log	Unique Log-Log pocket Made in England Front Scale LU, A [ S, R, C ] D, LL Back: Table of Trig Ratios Original Owner/Location: Unk/England
P202 Unique Log-Log	Unique Log-Log pocket Made in England by Technical Supplu Co., Brighton Front Scale LU, A [ S, R, C ] D, LL Back: Table of Trig Ratios Original Owner/Location: Unk/England
P010 Unique Concrete Calculator	Unique Concrete Calculator - pocket Made in England Front Scale A(thickness) [ B(height), C(length) ] D (volume) Back: Adv: Ready Mix Concrete Original Owner/Location: Unk/England
P199 Unique Five-Ten	Unique Five-Ten Made in England Front Scale: Note scales wrapped to double the length to 10 inches A1, D1 [ C1, L1 | L2, C2 ] D2, A2 Back: Table of Trigonometrical Ratios Original Owner/Location: Unk/England
REF Unique Five-Ten (Late model)	Unique Five-Ten (Late model) (Note: Later model, no nails to hold laminate) Made in England Front Scale: Note scales wrapped to double the length to 10 inches A1, D1 [ C1, L1 | L2, C2 ] D2, A2 Well: Decimal Equivalents of Fractions Original Owner/Location: John Sykes/England Archive - Scan donated by John Sykes (UK)
REF Unique Ten-Twenty	Unique Ten-Twenty Made in England Front Scale: Note scales wrapped to double the length to 20 inches A1, D1 [ C1, L1 | L2, C2 ] D2, A2 Back: Equivalents and material properties Archive - Jim Bready Collection (UK)
P011 Unique J180	Unique J180 Made in England - 9" long Front Scale K, A [ B, CI, C ] D, S, T, STR Back: Blank Original Owner/Location: Unk/England
S069 Unique Universal	Unique Universal Made in England - Tacked laminate, metal frame cursor Front Scale LU, S, A [ B, CI, C ] D, T, LL Back: Trig Identities Original Owner/Location: Unk/England
S267 Unique Universal I	Unique Universal I Made in England - Tacked laminate, Plastic frame cursor Front Scale LU, S, A [ B, R(CI), C ] D, T, LL Back: Trig Identities Original Owner/Location: Unk/England
S405 Unique Universal One	Unique Universal One (Modern) Made in England Front Scale LU, S, A [ B, CI, C ] D, T, LL Back: Conversion Factors Original Owner/Location: Unk/England
S062 Unique Universal II	Unique Universal II Made in England - Tacked laminate Front Scale LU, A [ B, S, T, C ] D, LL Back: Trig Identities Original Owner/Location: Unk/England
S063 Unique Universal II	Unique Universal II Made in England - new cursor, no tacks Front Scale LU, A [ B, S, T, C ] D, LL Back: Trig Identities Original Owner/Location: Unk/England
S272 Unique Universal Two	Unique Universal Two (Modern) Made in England - new cursor, new logo Front Scale LU(LL2), A [ B, S, T, C ] D, LL(LL3) Back: Trig Identities Original Owner/Location: Unk/England
S126 Unique Log Log	Unique Log Log Made in England Front Scale LL2, A [ B, C] D, LL3 Back: Trig Identities Owners: J.D.Freeman/The College at Marlborough England Owners: Sidney Sussex/Cambridge College, England
S126 Unique Log Log (Modern)	Unique Log Log (Modern) Made in England - new cursor, new logo Front Scale LU(LL2), A [ B, C] D, LL(LL3) Back: Trig Identities Owners: New
S279 Unique Brighton	Unique Brighton Made in England by USRC Front Scale 25.4mm // K, A [ B, CI, C] D, L, P || S, T Back Scale: LL1, LL2, LL3 Well: Decimal Equivalents Back: Trig Identities Owners: D.A. Bridle/Dorset, England
S484 Unique Commercial	Unique Commercial Made in England Front Scale H, K, M [ N (Discounts Scale), R(CI), C] D, U, V Back: Table for converting shillings and pence into pounds
ISRM Unique Electrical	Unique Electrical Made in England Front Scale LL2, Fahr, DF [ CF, CI, C ] D, Cent, LL3 Back: Specific Resistance & Temp Coeff. Table of Metals Owned by Roman Marian Russek (1933-2011). Donated by his wife, Shiela Russek, Toronto, Canada. Roman Russek was known for his wide knowledge of power cables and, in later years, for his expertise the transfer of technology within international joint ventures. At the close of WWII Roman was a member of the Polish Army under British command. With Communism descending on his homeland his left to study in Britain where he earned engineering degrees from Heriot Watt University (Edinburgh) and London University. By 1949 he was a Scientific Officer in the Wood Lane Research Laboratories of British Insulated Callenders Cables in London. There he was assigned to teams studying the mechanical behavior of aluminum sheaths, electrical characteristics of oil impregnated paper as well as assisting in the development of flexible joints for submarine cables destined to be used in the HVDC link between North and South Island in New Zealand. As Design Engineer and then Department Manager Roman traveled widely within Canada and internationally representing CWC in many negotiations and discussions with customers and associated firms. He was fluent in five languages. Later as Vice-President Technical Services Roman spent another 14 years transferring technology from the domestic company to the many fledgling associate companies in Mexico, Colombia, Venezuela, Dominican Republic, Ireland, Spain, Brazil. South Africa, Nigeria, New Zealand, Australia and Iran. Roman and his wife Shiela spent much of their retirement years traveling around the world. An Article about Roman Russek by his friend XAVIER KATAQUAPIT
S413 Unique Electrical	Unique Electrical Made in England Front Scale LL2, Fahr, DF [ CF, CI, C ] D, Cent, LL3 Back: Specific Resistance & Temp Coeff. Table of Metals
S279 Unique Electrical	Unique Electrical (modern cursor) Made in England Front Scale LL2, Fahr, DF [ CF, CI, C ] D, Cent, LL3 Back: Specific Resistance & Temp Coeff. Table of Metals Archive - Atsushi Tomozawa Collection
S413 Unique Tubemaking And Deep Drawing	Unique Tubemaking And Deep Drawing - 1952 Made in England by Unique for Tube Investments, Ltd. Departsments of Development and Research and of Plant and Construction Front Scale MM, R1 [ R2, TH(1G-21G), TH(22G-44G), TH(33-314), C ] D, WT (Mild Steel) Back: Weight Conversion Factors, Given Steel=1.000 Ad
ISRM Unique Study 500	Unique Study 500 Made in England by Unique Slide Rule Co.Ltd. Newhaven Sussex Front Scale K, A [ B, CI, C ] D, S, T Back: Blank Donated by Ted Hume (Texas)

W. H. Smith & Son

P207 W.H. Smith Simplified Reitz	W.H. Smith & Son Simplified Reitz Made in Englan (by BRL?) Front Scale K, A [ B, CI, C ] D, L Original Owner/Location: Unk/England
ISRM W.H. Smith - Jakar 29 Student Log/Log	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

Wiljon Technik-Art

ISRM Wiljon Technik-Art Log Log Trig

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

Misc British

P047 Bristol P19-5

Bristol P19-5 - Simplex Made in Japan - Advertising use Front Scale 5in // K, A [ B, CI, C ] D, L Back slider: [S, ST, T ] Sleeve Adv: Therm-Ohio