Chess game clock with warning and control flag - has arrangement for warning players of approaching thinking time limit

摘要

The chess game clock has a control flag (2) and warning flag (3) in an uplifted position first before elapse of the thinking time. This is to produce economically a simple clock arrangement into two flag indicators. The clock has around its face (1) a mutual ring (6) which gives an audible warning signal when flag (3) drops upon it. The centre of gravity of the flag lies at its free end and it is fixed onto face (1) of the clock just to the left of flag (2). In the horizontal position of flag (2) and flg (3) the former is positioned above flag (3) and the free end of flag (2) protrudes over the warning flag (3). The minutes indicator (4) carries a peg (5) for dropping the flags.