Locationįriden Calculating Machine Company, Inc. The date given is from Jorgenson.Įrnie Jorgenson, Friden Age List, Office Machine Americana, p. According to Carl Holm of Neopost, the model S 10 was introduced in 1938. The EC-132 model was introduced in 1965 and additionally has the square-root function. Friden STW 10 Mechanical Calculator Demo. The Friden EC-130, introduced in 1964, is a contender (together with the IME 84 and the Sharp CS10A) for the accolade of the first all-transistorised desktop calculator. It also shows the very impressive internals of the calculator. Who knows a mechanical calculator could be a musical instrument. 103,425.ĭesign patent D103,425 was granted to Carl M. This is a favorite of mine, the Friden March. [() MADE IN SAN LEANDRO, CALIFORNIA, U.S.A. It also reads: FRIDEN CALCULATING MACHINE CO., INC. A sticker attached to the bottom reads: MODEL S. A mark on the back and sides reads: FRIDEN. An electric cord attachs to the machine at the back.Ī mark on the bottom of the machine reads: S10-105632. Decimal markers slide below the two registers on the carriage. Zeroing knobs for the registers are on the right of the carriage. Hampton History Museum curator Allen One Take Hoilman shares a bit of our exhibit 'When the Computer Wore a Skirt: NASAs Human Computers,' which explores. The result register has plastic buttons above it that can be used to set up numbers. These are surrounded by further levers and function keys.īehind the number keys is a movable carriage with an 11-digit register and a 21-digit result register. Below it is a block of 9 white digit keys, with a 0 bar below. On the left is a register that indicates numbers entered for multiplication. On the right are two columns of function bars and keys. Metal rods between the columns of keys turn to indicate decimal places. It has a metal frame painted gray and ten columns of color-coded gray and blue-green plastic number keys, with a blank green key at the bottom of each column. This is an example of that full-keyboard non-printing electric stepped drum machine. The back of the ruler has lists of decimal equivalents for twelfths, eighths, and.
Friden calculator youtube movie#
There were just a few electronic ones like the Friden EC 130, which is an early serial and in very nice condition. The ruler is marked: PRODUCTS OF Friden THE NATURAL WAY ADDING MACHINE (/) THE AUTOMATIC CALCULATOR (/) THE COMPUTYPER (/) DATA PROCESSING MACHINES. Yes, this 1956 Friden STW10 is the calculator machine on the desk of Katherine Johnson in the movie Hidden Figures. Many old Fridens and 50s and 60s era stuff. In January 1966 a substantial price reduction was announced in Britain ("of over 20%"), to £690 for the EC-130 and £810 for the EC-132 (nearly the average annual wage at that time).By 1939 Friden Calculating Machine Company had introduced a “Supermatic” version of its calculating machine that featured multiplication by direct entry of digits (rather than repeated addition). Someone I know is selling her late husband's whole collection of mechanical calculators. The Friden EC-130, introduced in 1964, is a contender (together with the IME 84 and the Sharp CS10A) for the accolade of the first all-transistorised desktop calculator. Technology - 8 boards with individual transistors (mainly 2N1304 (NPN) & 2N1305 (PNP) alloy-junction Germanium transistors, & 2N2635 transistors) on 8 boards 290 mm x 170 mm (11.5" x 7"), and delay line memory. The EC-130 (without square root) was one of the first all-transistor electronics calculators, in 1964.Ĭapabilities - 4 functions, memory, square root.ĭisplay - 4 lines of 12 characters each, using cathode ray tube, see below. It goes into great level of detail of how the logic of the machine operates, down to the gate and flip-flop level.
Friden calculator youtube manual#
This is the official Service Manual for the Friden EC-130 Electronic Calculator. I emailed LTT thinking they could make a fun video featuring them, and they agreed It was a pretty quick turn around, especially considering the holidays were all in the middle. Uses a crt (Cathode Ray Tube) to display the contents of the four registers. Friden EC-130 Service Manual September, 1965. My Fridens were featured on Linus Tech Tips I have 3 Friden STW10s, and about a month ago I was able to get one functioning. Ten-key electronic desktop calculator with square root.
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