Chess clock

Details Chess clock Chess clock

1980-11-17

1982-12-07

Roskoski, Bernard

Horology: time measuring systems or devices

Time interval

With alternately operating indicators

368 10, 235 92T, G04F 300

Patent

active

043623930

ABSTRACT:
A casing with common padded first and second cavities holds two self-contained, battery-operated, commercial, digital-electronic pocket-calculators in a removable fashion. The "equal/repeat" keys of both calculators are brought out to calculator-embedded contacts by the manufacturer. The casing further includes a rocking rod, two micro switches, a battery and a control circuit. The control circuit develops "shorts" spaced by one second time intervals. The calculators are used as time-pre-programmed, decrementing, by seconds, time, scorekeepers as the shorting pulses are applied to the one calculator whose owner's move it is in a game of speed chess. The calculators and other parts are consumer-replaceable.

REFERENCES:
patent: 3698180 (1970-10-01), Klein
patent: 4140897 (1979-02-01), Guerra
patent: 4151596 (1979-04-01), Howells
patent: 4220992 (1980-09-01), Blood et al.
Radio Electronics, vol. 46, No. 11, pp. 43-45, Nov. 75, Simple Circuit ADOS Elapse Time Measurement Feature to Basic Calculator Operation.
Electronics Australia, May 76, pp. 69, 71. "Simple Circuit Converts Calculator to Stop Watch," Brury.
Elektor, Jul./Aug. 1979, Calculator as a Chess Clock, vol. 51/52, No. 7-8, 7-41-7-42.

Affiliated with

Also associated with

Rating

Chess clock does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chess clock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chess clock will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1900258