Graphoplex is a French manufacturer of slide rules that also supplied slide rules for
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 P195 Graphoplex - CEFEM - Methane Gas Combustion |
Graphoplex - CEFEM - Methane Gas Combustion Conditions D'Empli De La Règle De Combustion Du Gaz De Lacq Made in France for Compagnie Francaise Du Methane (CEFEM) Front Scale L, A, B3, B2 [ b2, a, b ] B, LL3, LL2, LL1 Back scale e%, O2 %, CO2 % [ CO%(e), CO%, CO2% ] t°C, t°F, ρ/PCI, ρ/PCS  Instructions - 2.84Mb |
 S298 Graphoplex 610 Rietz |
Graphoplex 610 Rietz Made in France Front Scale (Extended Scales) K, A [ B, CI, C ] D, L Back: Blank |
 P167 Graphoplex 612 |
Graphoplex 612 Made in France Front Scale (Extended Scales) 13cm // K, A [ B, CI, C ] D, L Back scale: [S, ST, T] Back Name: Papeterie Joseph Gibert |
 S461 Graphoplex 614 Simplex Log Log |
Graphoplex 614 Simplex Log Log Made in France - 1964 - Dual labeled: Left-French, Right-(Conventional) Front Scale (Extended Scales) 13cm // LL2, LL3, B3(K), B2(A) [ b2(B), L, a(CI), b(C) ] B(D), S cos, S&T, T ctg Back scale: Blank |
 P228 Graphoplex 615 System Rietz |
Graphoplex 615 System Rietz Made in France - C1964 Front Scale (Extended Scales) 17cm // K, A [ B, CI, C ] D, L Back scale: [S, ST, T] Multi-lined cursor |
 S462 Graphoplex 620d System Rietz |
Graphoplex 620d System Rietz Made in France - 1962 - French labels Front Scale (Extended Scales) 27cm // B3(K), B2(A) [ b2(B), L, a(CI), b(C) ] B(D), L Back scale: [ S Cos, S&T, T ctg ] Multi-lined cursor |
 S464 Graphoplex ref. 620 System Rietz |
Graphoplex ref. 620 System Rietz Made in France - 1964 - Conventional Labels Front Scale (Extended Scales) 27cm // K, A [ B, CI, C ] D, L Back scale: [SRT, S Cos, T<45°, C] Multi-lined cursor |
 S460 Graphoplex 640 System Electric Log Log |
Graphoplex 640 System Electric Log Log Made in France - Dual labeled: Left-French, Right-(Conventional) Front Scale (Extended Scales) 27cm // L, B3(K), B2(A) [ b2(B), K, a(CI), b(C) ] B(D), LL3, LL2, LL1 Back scale: [ cos, sin, tg, b(C) ] Back: Electrical Equations and Diagrams Multi-lined cursor |
 S463 Graphoplex 640 System Electric Log Log |
Graphoplex 640 System Electric Log Log Made in France - 1958 Front Scale (Extended Scales) 27cm // L, P, A [ B, K, CI, C ] D, LL3, LL2, LL1 Back scale: [ ST, S Cos, T<45°, C] Multi-lined cursor |
 ISRM Graphoplex 640 System Electric Log Log |
Graphoplex 640 System Electric Log Log Made in France - 1958 Front Scale (Extended Scales) 27cm // L, P, A [ B, K, CI, C ] D, LL3, LL2, LL1 Back scale: [ ST, S Cos, T<45°, C] Multi-lined cursor Donated by David Hecht, Alexandria, VA |
 P227 Graphoplex 643 Electric Log Log |
Graphoplex 643 Electric Log Log Made in France - 1964 - Dual labeled: Left-French, Right-(Conventional) Front Scale (Extended Scales) 27cm // L, cos, B3(K), B2(A) [ b2(B), a(CI), b(C) ] B(D), LL3, LL2, LL1 Back scale: [ S&T, S, T, b(C) ] Back: Blank Multi-lined cursor |
 S459 Graphoplex 645 System Commercial |
Graphoplex 645 System Commercial Made in France - 1958 Front Scale (Extended Scales) 27cm // DF [ CF, CI, C ] D, £, s/d, Conversions Back scale: [ LL3, LL2, LL1, C] Back: Examples of Interest Calculations |
 REF Graphoplex 650 Electro |
Graphoplex 650 Electro Made in France Typical of the French, they just had to change the scale tags. Normal in () Front Scale (Extended Scales) 13cm // L, B3(K), COSφ, B2(A)Kw [ b2(B)PS, a(CI), b(C) ] B(D), COSφ, Dynamo/Moteur, Volt Back scale: [S&T, S, T, b(C) ] Archive - Atsushi Tomozawa Collection |
 Graphoplex 690A Neperlog Duplex ISRM 05.02.15.01 |
Graphoplex 690A Neperlog Duplex Made in France - 1964 Front Scale (extended) LL00, L, T>45°, A [ B, T<45°, SRT, S C ] D, P, DI, LL0 Back Scale: LL01, LL02, LL03, DF [ CF, CIF, K, CI, C ] D, LL3, LL2, LL1 Multi-lined cursor |
 REF Graphoplex 692 |
Graphoplex 692 Duplex Made in France Front Scale L, P, AI, A, [ B, T (t), S&T, S Cos ] D, DI, K Back Scale: LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Archive - Not in Collection - D'Antiques |
 REF Graphoplex 692b Neperlog |
Graphoplex 692b Neperlog - Duplex Made in France Front Scale (Extended scales) LL00, L, T>45°, A [ B, T<45°, SRT, S C ] D, P, DI, LL0 Back Scale: LL01, LL02, LL03, DF [ CF, CIF, K, CI, C ] D, LL3, LL2, LL1 Archive - Not in Collection - SRTG |
 ISRM Graphoplex 1600 System Rietz |
Graphoplex 1600 System Rietz Made in France Front Scale (Extended Scales) 27cm // L, T>45° Cot, A [ B, K, CI, C ] D, S Cos, ST, T<45° Cot Back: Blank Donated by David Hecht, Alexandria, VA |
 S255 Graphoplex 1600 System Rietz |
Graphoplex 1600 System Rietz Made in France Front Scale (Extended Scales) 27cm // L, T>45° Cot, A [ B, K, CI, C ] D, S Cos, ST, T<45° Cot Back: Blank |
 S465 Graphoplex 1614 System Log Log |
Graphoplex 1614 System Log Log Made in France - 1958 Front Scale (Extended Scales) 27cm // LL2, LL3, L, A [ B, K, CI, C ] D, S Cos, ST, T<45° Cot Back: Blank Multi-lined cursor |
 REF Graphoplex 1694 Techni-Math |
Graphoplex 1694 Techni-Math Made in France - 1961 Front Scale (Extended Scales) 27cm // P, K, A, DF [ CF, L, CI, C ] D, S Cos, SRT, T, Cot Back: Blank Multi-lined cursor Archive - Image from Herman van Herwijnen's Catalogue |
 REF Graphoplex_Insert |
Graphoplex_Insert Provided with most slide rules Calculation aids and instructions for care of slide rule (French) |
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Koh-i-Noor Hardtmuth a.s. is a Czech manufacturer and one of the world's largest producers and distributors of a full line of pencils, pens, and art supplies.[1] Formed in 1790 by Joseph Hardtmuth of Austria, the company was named after the Koh-i-Noor, a famous Indian diamond. In 1802, they patented the first pencil lead made from a combination of clay and graphite. Koh-i-Noor Hardtmuth eventually became a state-owned company after the Second World War, before once again becoming privately held in 1992 and being bought-out in 1994 by the Gama Group. Prior to 1978 they were a reseller of slide rules made by Graphoplex are also a contract manufacturer of small injection-molded plastic products. Koh-I-Noor Slide Rules Fabrik Pvt. Ltd in India, (the relationship with Koh-I-Noor Hardtmuth is unknown), is still making special purpose plastic slide rules, including circular computers for aviation.They say on their web site: "We are the pioneer manufacturers of Slide Rules in India! In the year 1949, our company started the production of Slide Rules in 6" & 12" sizes for students, professionals and Army." |
 ISRM Koh-i-noor 10020 Techni-Math |
Koh-i-noor 10020 Techni-Math Made in France - c1961 Front Scale (Extended Scales) 10 in // P, K, A, DF [ CF, L, CI, C ] D, S Cos, SRT, T, Cot Back: Blank Multi-lined cursor Donated by David Hecht, Alexandria, VA |