US Patent 7588136 Coin-operated actuation mechanism with anti-vandalism device

An anti-vandalism device in a coin-operated actuation mechanism includes a stop movably extendible and compressible in length and mounted on a coin retainer plate in alignment with a bore therein for moving between a forward blocking position and a rearward unblocking position relative to the bore and to a coin receiving recess in a coin carrier wheel on an opposite side of the retainer plate depending upon whether or not the recess is devoid of a valid coin, and a cam surface actuator defined on a ratchet gear wheel disposed adjacent to the coin retainer plate in a position to engage the stop and cause it to move from its rearward unblocking position to its forward blocking position when the coin receiving recess is devoid of a valid coin and in response to the ratchet gear wheel moving with the coin carrier wheel.