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curta.li: model history, user and service manuals, parts photos, blueprints, etc. YACS-Yet Another Curta Simulator. A 3D Simulator in VRML; Type and Age of your Curta; Files to 3D print a 3:1 scale model of a Curta; Curta.fr Mainly focused on maintenance, repair and support. In french. Bruderer, Herbert (Autumn 2016). "Multiple Curtas".
Following the patent and release of Harold's Long Scale calculator featuring two knobs on the outside rim in 1914, he designed the Magnum Long Scale calculator in 1927. [ 6 ] [ 7 ] As the name "Magnum" implies, it was a fairly large device at 4.5 inches in diameter—about 1.5 inches more than Fowler's average non-Magnum-series calculators. [ 8 ]
[38] [note 4] The Whythe-Fuller model was advertised in a 1962 W.F. Stanley catalogue at £21 (£566 in 2023). [18] The calculator was still listed in Stanley's catalogue in 1976 [note 5] when model 1 cost £60 (£545 in 2023) and model 2 was £61.25. [42] In the United States the instrument was marketed by Keuffel and Esser who only supplied ...
Friden introduced the first fully transistorized desktop electronic calculator, the model EC-130 in June 1963, designed by Robert "Bob" Appleby Ragen. [1] [2] [3] This machine had a 13-digit capacity and a 5-inch CRT display. It used a magnetostrictive delay-line memory, to save money on expensive transistors. The EC-130 sold for $2,200 ...
It uses AG10 batteries and has 3 key independent memory and has a hard shell cover. It costs $62.99 on the official Victor website for a 10 pack so 62.99/10 would be $6.299 for 1 calculator. [5] 907 - The 907 is a black and grey/gray 1.6 oz portable calculator with a 10-digit LCD display with 20 built-in conversion functions. It includes a ...
The Hewlett-Packard Voyager series of calculators were introduced by Hewlett-Packard in 1981. [4] All members of this series are programmable, use Reverse Polish Notation, and feature continuous memory. Nearly identical in appearance, each model provided different capabilities and was aimed at different user markets.
The "D" model started manufacture in 1915 with serial numbers below 4,000. The "E" model started manufacture in 1916 with serial numbers beginning at 4,000. The "F" model was introduced in 1917 with serial numbers above 6,000. [11] The "G" model was the first machine of the refined style, and was introduced in 1919 with serial numbers above ...
Thus the scale and approximate prototype gauge are represented, with the model gauge used (9 mm for H0e gauge; 6.5 mm for H0f gauge) being implied. [ 2 ] The scales used include the general European modelling range of Z, N, TT, H0, 0 and also the large model engineering gauges of I to X, including 3 + 1 ⁄ 2 , 5, 7 + 1 ⁄ 4 and 10 + 1 ⁄ 4 ...