On 22.07.13 12:07, andy pugh wrote: > My local Air Cadets group had a tour of the Systime factory in Leeds > where they seemed to be doing everything including IC artwork. The > thing that impressed me most at the time was the wide-carriage > lineprinter with a rotating band of characters and a hammer for each > column position.
That sounds like a chain printer (there's a wikipedia entry), and they avoid some of the problems with drum printers. We must have had an early drum printer on the ICL1901A mainframe at uni, because we students were advised not to use lines of e.g. 120 asterisks, because of the big thump. All 120 hammers would only fire simultaneously if the letters in the drum columns were not stagggered. (I never tested the advice, so don't know how accurate it was.) The printer was about the size of a refrigerator lying on its side, taller and narrower. Erik -- "You are serving roast hare today, I read outside", said the official from trade inspection. "Pure roast hare?" "With some horse", confessed the chef. "In what ratio?" "50 - 50: One hare, one horse." - Translated from a German version on vim ML. ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
