Abstract: A storeroom for transport carts, particularly supermarket shopping carts and the like, having removal and return passage barriers, a money collection point for the opening of the passage barrier and a money return point upon the return of the transport cart into the storeroom, a data support associated with the transport cart and a reader for the data in the region of the removal and return passage barriers. Each cart carries its own data code and the reader of the removal passage barrier is coupled with the reader of the return passage barrier such that the reader of the removal passage barrier transmits the individual code of the cart which it has read to the reader of the return passage barrier. The latter releases the return of the money only upon the passage of that transport cart which is provided with that individual code.

Abstract: A lock provides a locking function after the insertion of a coin into it. The lock includes a punch card scanner which serves to enable the lock to provide the locking function. The lock includes a moveable bolt which is responsive to the scanner and a detent-like blocking catch. Movement of the bolt toward a locked position urges an inserted coin to lift the blocking catch, thereby freeing the bolt for further movement.

Abstract: A lock with a locking function adapted to be actuated after the insertion of a coin, in which the coin drops into a supported position in the bolt which is displaceable by key actuation, the edge of the coin releasing the bolt for the locking displacement by disengaging a pawl. The supported position is established by a resting point on the bolt side and a second resting point, the distance between the two resting points being variable as a function of the closing movement. One of the resting points is formed by the free, eccentrically shaped end of a rotary projection which is seated in a bolt-side lever which upon locking movement passes against spring action into a position which is at a greater distance from the bolt resting point. The rotary projection forms an attack surface, facing the rear wall of the lock, for a conversion tool.