Electronic chess clock

Details Electronic chess clock Electronic chess clock

1983-04-04

1984-08-07

Miska, Vit W.

Horology: time measuring systems or devices

Time interval

With alternately operating indicators

G04F 300

Patent

active

044640609

ABSTRACT:
An electronic chess clock includes a generally rectangular casing atop which an elongate switching lever is mounted for pivotal movement about the center of the lever. A pair of electrochemical clockworks are contained in the casing for measuring and displaying time periods representing deliberation time of the chess players. A selected one of the two clockworks is actuated when the switching lever is pivoted downwardly at one end to actuate a microswitch associated with the selected clockwork. A common quartz-controlled time module provides time pulses to the selected one of the clockworks to insure that both of the clockworks operate at an equal rate. A manually actuable change-over switch coupled to the time module operates to allow the frequency of the time pulses to be selected so that the hand of the clockworks can indicate elapsed time on an expanded scale for greater accuracy in "short time" chess matches.

REFERENCES:
patent: 2079204 (1937-05-01), Foster
patent: 2539754 (1951-01-01), Rettinger et al.
patent: 4021046 (1977-05-01), Barlow

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