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Singer was an interesting company. I worked for them from 1969 to early in 1975. They had purchased a company, Friden, that manufactured rotary calculators (electro-mechanical calculators,) I sold for the division that manufactured punch paper tape oriented Flexowriters and billing/accounting machines called Computypers. When I first started, I believe it was called "Friden Division,The Singer Company." Then "Singer/Friden." Finally "Singer Business Machines."Friden built the 747 simulator for pilot training.They also built and marketed the first electronic calculator in the USA, the Friden EC 130. These things weren't cheap. Somewhere in the range of $2000, and those were 1963/1964 dollars!Loved selling for them. Interesting products for the time.Bob
Hey Bob, I worked for HP back then and always thought their HP35 was the first to market, correct me if I�m wrong.Ahh maybe the HP35 was the first �scientific � calculator. We used to fix them down to component level & there was an upgrade to correct an error in Pi in the early ones. Had to replace 3 x 8 leg ROM cans to fix it. Kev
I sold Friden source data recording and billing systems. I think the EC 130 was perhaps the first four function electronic calculator on the market. Our 5610 billing and accounting machine used a similar memory. I don't find the term on any of the YouTube videos on the EC 130, but to us, it was 'delay line' storage. Incredibly, it (the delay line) consisted of approximately 50' of thin guitar-like string, wrapped into a package much like what you'd see if you were purchasing bulk string. As I recall, there was a transducer at the 'beginning' of the wire that would put torsional twists into the wire. Ones may have been represented by a clockwise twist. Zeros would have been represented by counterclockwise twists. Programs were also stored on the delay line. These torsional twists made their way around the 50' of wire, and when they reached the end of the wire, an amplifying/repeating transducer would put them back on the beginning of the wire. Of course it took electronic logic to interpret the signals on the wire. We also stored up to 120 registers of 15 bits plus decimal point plus sign on the delay line. To say this memory was volatile is an understatement. Sola constant voltage transmitters were recommended.Computing before IBM or Radio Shack computers! Fun stuff, and like old Guzzis, it just worked.