DIGITAL CHESS CLOCK Russian patent published in 2014 - IPC G04G3/00 

FIELD: physics.

SUBSTANCE: chess clock for playing with a remote opponent comprises a power supply unit 1.1 (1.2), a timing pulse forming unit 2.1 (2.2), an information processing unit 3.1 (3.2), a switch 4.1 (4.2), a means 5.1 (5.2) of displaying time to opponents, a radio link 6, an information receiving/transmitting unit 7.1 (7.2), a means 8.1 (8.2) of displaying the next move of the remote player, a unit 9.1 (9.2) for checking the move of the opponent, a unit 10.1 (10.2) for setting the mode for tracking the time taken by opponents pondering a move, a video transmitting device 11.1 (11.2), a means 12.1 (12.2) of visual imaging the remote opponent, a means 13.1 (13.2) of counting errors and faults, a means 14.1 (14.2) of displaying faults, a driving generator 15.1 (15.2), a modulating code generator 16.1 (16.2), a phase-shift modulator 17.1 (17.2), a modulating function generator 18.1 (18.2), an amplitude modulator 19.1 (19.2), a first heterodyne 20.1 (20.2), a first mixer 21.1 (21.2), a first intermediate frequency amplifier 22.1 (22.2), a first power amplifier 23.1 (23.2), a duplexer 24.1 (24.2), a transceiving antenna 25.1 (25.2), a second power amplifier 26.1 (26.2), a second heterodyne 27.1 (27.2), a second mixer 28.1 (28.2), a second intermediate frequency amplifier 29.1 (29.2), an amplitude limiter 30.1 (30.2), a synchronous detector 31.1 (31.2), a multiplier 32.1 (32.2), a band-pass filter 33.1 (33.2), a phase detector 34.1 (34.2), a first narrow-band filter 35.1 (35.2), a phase inverter 36.1 (36.2), an adder 37.1 (37.2), a frequency selector 38.1 (38.2), a second narrow-band filter 39.1 (39.2), an amplitude detector 40.1 (40.2), a threshold unit 41.1 (41.2) and a switch 42.1 (42.2).

EFFECT: high noise-immunity, selectivity and reliability of reception, processing and transmission of information on moves and time spent pondering a move by opponents separated by a considerable distance by suppressing spurious signals received via additional channels.

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