1975-03-06
1976-06-08
Weldon, Ulysses
58 23R, 58 395, G04B 520
Patent
active
039614735
ABSTRACT:
The timer comprises an oscillator and a pair of memories for selectively receiving and storing signals from the oscillator. Each memory is connected to a display which indicates in digital form, and to the nearest tenth, the number of minutes of play that are represented by the signals stored in the associated memory. Before the start of a chess game, each player pushes one of two switches which directs the oscillator signals to the count-down terminal on the associated memory to store therein signals corresponding to the amount of minutes that player is allotted for making a certain number of moves. When play commences the players alternately operate a second pair of switches, one after each move, selectively to direct the signals to count-down terminals on said memories to continuously update the previously stored signals of a memory during the time the associated player is making a move. When a memory registers zero, a blanking circuit causes the corresponding display to flash on and off to indicate time has run out.
REFERENCES:
patent: 3499279 (1970-03-01), Abe et al.
patent: 3646751 (1972-03-01), Purland et al.
patent: 3662535 (1972-05-01), Hedrick et al.
patent: 3664116 (1972-05-01), Emerson et al.
patent: 3698180 (1972-10-01), Klein
patent: 3795099 (1974-03-01), Tsuruishi
patent: 3878675 (1975-04-01), Prociuk
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