Coin operated timer

Abstract

A coin responsive device actuates a motor driven time only if a pair of predetermined coins have been deposited. The device comprises a manually rotatable disk containing first and second circumferentially arranged coin receiving slots. The disk is secured to a central shaft, and a ring member having first and second detents is concentrically attached to the disk. A dog mounted adjacent the ring member is pivotable between first and second positions. The dog is spring-biased into the first position wherein the dog is engageable with either of the ring member detents for locking the disk against rotation. A friction clutch between the shaft and disk prevents damage by forcing rotation of the disk when it is locked. A cam member contacting the coins during rotation of the disks urges the dog into the second position wherein the dog is clear of the detents. As a result, the disk can be fully rotated only if both coins are in place within the receiving slots. During full rotation of the disk, a switch is tripped to complete an electrical circuit for energizing the timer. After a predetermined time period, a rotary actuator on the output shaft of the timer motor breaks the circuit.

Dependencies are inferred from the claim text.