Abstract: The invention relates to an electrical chess clock comprising a pair of time measuring circuits each having a digital time display device. The time measuring circuits are driven by a common pulse source which may alternately be connected to the time measuring circuits by means of a switching circuit being operated by the players. The digits of the time display device which normally indicates minutes may in certain periods of time, for example during the last minute of each hour, be shifted to indicate seconds. It is then sufficient that each time display device contains three digits.

Abstract: An electronic taximeter having a fare computing unit, a selector circuit and an operation switching unit. The fare computing unit computes a fare at a rate determined by logic signals developed by the selector circuit, which is responsive to signals applied thereto. The operation switching unit is operable to develop selected operating signals to determine the logic signals developed by the selector circuit. The selector circuit remains in an operating state determined by the last operating signal applied thereto, even after the last operating signal is removed, until a new operating signal is applied to change the logic signal output of the selector circuit.