Patent GB-378146-A (GB)
Title: Improvements relating to coin released door locks
IPC: G07F17/14
Filed: 1931-06-22
Abstract: 378,146. Coin-freed door locks. TONKS, W. H. and SPARKS, W., 201, Moseley Street, Birmingham. June 22, 1931, No. 17995. [Class 27.] Coin action, weight and multiple-coin.-In a coin-freed door lock having a rotatable coin carrier actuated by an external handle and a coin actuated pawl to retain the carrier, the bolt comprises a pair of spring-controlled relatively movable parts b, d, Fig. 1, the part b being engaged by the coin carrier and the part d engaging the striking plate on the door frame. The part d is pressed out by a spring e and is withdrawn by a flange j on the part b which is pressed out by a spring c and is retracted by a projection b<1> on a coin carrier p, when this is rotated by the outside handle after the insertion of a coin. The bolt may be withdrawn by a bell-crank lever h on the spindle g of an inside handle, the lever h engaging a shoulder i on the part b. The lever h can also be operated by a key inserted through a keyhole l, unauthorized operation being prevented by a guard plate m. Coin action, weight and multiple-coin; coindischarging mechanism.-A coin inserted through a slot r drops into the carrier p and, by its weight, presses aside a pawl t from engagement with a notch u in the carrier. The coin comes to rest against a fixed abutment w on the carrier and a pin x on a double-armed lever y which is moved relatively to the carrier by the part d, when the door is again closed after being opened, thereby allowing the coin to drop to a money-box. In the case of two coins, instead of a fixed abutment w, a pivoted abutment 14, Fig. 6, is employed. The first coin rests between the end 15 of the abutment 14, which is rocked by the coin, and a projection 16 on the bolt part b. The second coin rests between the upper end 14 and a projection 24 on an extension 23 of the part b. Opening the door releases the coins. Indicators.-An " engaged " indicator plate 6 is raised by a projection 4 on the usual handoperated sliding bolt on the inside of the door, the projection 4 actuating the indicator through a bell-crank lever 5. The lever 5 is actuated to return the indicator and the auxiliary bolt, when the door is opened from the inside by an extension 7 on the pawl b engaging the lever 5. Repeated actuation, in the event of a bent coin jamming in the coin carrier, is prevented by a stop 11 depending from the indicator plate and engaging a lateral projection 13 on the coin carrier. Registering.-A coin counter may be actuated by the projection 13 on the carrier. The carrier is provided, in this case, with a plurality of teeth to be engaged by the pawl t, to prevent more than one actuation of the counter after the insertion of a coin. Coin-slit closing-devices.-A coin inserted in the slit r moves aside a pivoted shutter 8, Fig. 2. When the pawl t is moved by the coin in the carrier, it comes behind and prevents movement of a vertical freely hanging lever 9 which obstructs movement of the shutter 8 thereby closing the coin-slit while a coin is in the carrier. A projection 10 on the indicator plate 6, when this is raised, blocks the lever 9 to prevent insertion of a coin while the inside auxiliary bolt is shot.