METHOD FOR MONITORING DURATION OF CHESS GAME AND CHESS CLOCK WHICH IMPLEMENTS SAID METHOD Russian patent published in 1999 - IPC

FIELD: sporting equipment. SUBSTANCE: method involves setting accumulation duration at first and second clocks. When this period is exceeded, accumulation concerns only time intervals, which are shorter given duration of each move. Corresponding clock has two pointer indicators and rotating flag. Rotating flag and pointers are mounted for additional relative movement. Another claim of invention discloses device which has single move meter and move duration setter. Counter has unit for locking of duration accumulation with locking duration setter. EFFECT: elimination of time trouble stress, increased precision for detection of moment, when permitted time is exceeded. 11 cl, 7 dwg