I worked on a Runway Visibility Computer in 1965 that was composed of a whole box of transistor flip-flop counters using 2N404 transistors and lights for status. The Runway visual Range was displayed on a "digital" readout consisting of drums with numbers painted on them and positioned with stepping motors. These counters were binary but "cheated" with feedback to form base 8, and base 10 counters. I will spare you the rest of the details on this machine.
Lee Not as dramatic a find as the 1946 patent, but a piece of history. ----- Original Message ----- From: "Scott Newell" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Tuesday, May 16, 2006 1:30 PM Subject: Re: [time-nuts] Interesting Patent > At 11:20 AM 5/16/2006 , Brooke Clarke wrote: >>Hi: >> >>I came across a 1946 patent for a vacuum tube based counter circuit that >>will divide 60 Hz down to 1 Hz. It's interesting in that there's a >>discussion about the advantage of using binary instead of base 10 and >>also about using feedback to change the scale of the counter from 64 to >>60 (or 50). See: > > Nice find. I find it easier to enter the patent number (2410156) into the > free service at http://www.pat2pdf.org/ and download a single pdf. > > > -- > newell N5TNL > > > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
