Abstract: A technique is disclosed for protecting against electrocution or shock resulting from contacting an exposed conductor which is connected to a power supply. The flow of power to the conductor, whether DC or AC, is periodically interrupted and during the interruption, contact between a body and the conductor is sensed. If the body is not contacting the conductor, power is restored, but if the body is contacting, the interruption is maintained. The circuit may also distinguish between contact with the body and contact with an electrical device which receives power from the conductor. The electrical device includes a barrier circuit, such as a diode, which switches to an electrical state, such as a high impedance state, when power is interrupted. Because the electrical characteristics of the barrier circuit, such as its capacitance, differ from those of a body, the circuit is able to detect contact with a body.

Abstract: A bowling game which utilizes a plurality of bowler cards, each carrying ability indicia representing a particular bowler's ability in a statistically accurate manner. Dice are rolled to represent the rolling of a bowling ball, and the reading of the dice indicates specific indicia on the bowler's card. The indicated indicia refers the game player to corresponding strike and spare boards which carry result indicia representing in a statistically accurate manner the score that the particular bowler would probably obtain, based on his average performance.