Patent GB-198135-A (GB)
Title: Improvements in or relating to turnstiles for registering and checking admissions of passengers or the like
IPC: G07F17/14
Filed: 1922-03-24
Abstract: 198,135. Thomas, J. P., and London Electric Railway Co. March 24, 1922. Turnstiles. - The lock of an electrically-controlled turnstile 17 is released for a number of operations of the turnstile corresponding to the number of coins inserted in a ticket-vending machine 10, means being provided to prevent the insertion of further coins when the passengers to be cleared through the turnstile reach a predetermined number. The ticket-vending machine has a coin-slot 11 adapted to be closed by a barrier 12 controlled by a solenoid 13, a sign 14 operated by another solenoid being exhibited when the slot is closed. The turnstile 17 has a lock that is released by the operation of a solenoid 21; the turnstile spindle carries a cam member 212 which opens a switch 214 at each operation of the turnstile. The controls shown cause the slot 11 to be closed and the sign 14 to be exhibited after three persons have taken tickets but have not been cleared through the turnstile. In operation, the switch 214 and those switches controlled by a solenoid 75 are normallv closed, and when a coin is inserted in the machine 10 the gap 15, 16 in the circuit of a solenoid 74 is bridged, thus closing the switches operated by it. A circuit is completed through 91, 104, 207, 94, 90, 100, 145, 147 energizing solenoids 78, 79 : holding circuits for these solenoids are formed through their own switches 148 and 156 respectively, the solenoid 77 not being operated as it is shunted by the circuit through 89, 98. The turnstile lock is released by the circuit through the solenoid 21 being completed by the switch 150. When the contacts 15, 16 are disconnected again the shunt circuit is broken and the solenoid 77 energized. On a second operation of the machine 10 before the first passenger passes through the turnstile, the action of the solenoid 74 completes a circuit as before to the switch 100, and thence, as the solenoid 77 is energized, through 144, 171 and 175 energizing solenoids 81, 82. Holding circuits are established for these two solenoids as before, and on the breaking of the circuit of the solenoid 74 a solenoid is energized as described with reference to the solenoid 77. If a third person takes a ticket before the first passes the turnstile a solenoid 83 is energiezd by a circuit 91, 104, 207, 94, 89, 98, 139, 174: a holding circuit through this solenoid is formed by its own switch 194. A second switch 196 is lifted by the solenoid 83 breaking the circuit of the solenoid 13 which normally holds the barrier 12 from closing the coin-slot 11, and completing a circuit to cause the sign 14 to be exhibited. When the first person passes through the turnstile the switch 214 is opened and a solenoid 84 de-energized; the solenoid 83 is shunted by a circuit through 195, 192, 206 and its switches released : the completion of the movement of the turnstile closes the switch 214, thus energizing the solenoid 84 again and causing the solenoid 82 to be shunted by a circuit through 187, 188, 184, 205. As soon as the solenoid 83 is released the barrier 12 across the coinslot is lifted and the sign 14 withdrawn. The passage of the second person through the turnstile releases the solenoids 81, 79 and 80 and the passage of the third person the solenoids 78 and 77. The solenoids 75 and 76 are to ensure correct operation should the contacts 15, 16 be bridged while the switch 214 is open or the contacts 15, 16 be bridged for a period during which the switch 214 is opened and closed : in the event of the first coincidence a holding circuit for the solenoid 74 is established through 108, 92, 115, 88, 86 and maintains the solenoid energized until the switch 214 is closed, thus completing the ordinary circuits controlling the turnstile and simultaneously energizing the solenoid 76 through 119, 120; the solenoid 74 is shunted through 88, 125 and is thus released; should the second contingency occur, the turnstile controlling circuits are operated as usual and the solenoid 76 energized; when the switch 214 is opened the solenoid 84 is released, shunting the solenoid 75 through 110, 112, 113, 129; the switches of this solenoid fall preventing a second impulse being sent through the controlling circuits when the switch 214 is closed again. Specification 196,093 is referred to.