Patent GB-196093-A (GB)
Title: Improvements in or relating to turnstiles for registering and checking admissions of passengers or the like
IPC: G07F17/14
Filed: 1922-01-17
Abstract: 196,093. Thomas, J. P., and London Electric Railway Co. Jan. 17, 1922. Turnstiles. - A turnstile for registering and checking admission of passengers or the like is provided with a bolt electrically connected to a manual switch, an automatic ticket-dating and cancelling machine, or an automatic ticket - selecting and issuing machine or any combination of these devices so as to be withdrawn when any one of them is operated: means is also provided, when several tickets are simultaneously issued by one of the devices, to maintain the bolt withdrawn for a corresponding number of operations of the turnstile. In a simple form the operation of the switch 10 manually or by either of the above specified machines completes a circuit through the solenoid 28 operating the switches 27, 25, and thus causing a solenoid 21 to withdraw the bolt 20 from a turnstile 13. The turnstile carries a drum with contact plates 14 spaced apart by insulating strips 15 and adapted when engaged by brushes 16, 17 to retain closed a maintaining circuit through the switch 27 for the solenoid 28. On rotation of the turnstile the maintaining circuit is broken, thus opening the switch 25 and freeing the bolt 20. The switch 10 may be connected with a counting device. In Fig. 4 connections are shown for maintaining the bolt withdrawn fur a number of operations of the turnstile corresponding to a number of tickets simultaneously issued or a number of season-ticket holders desiring to pass. Leads 31, 48, - - 51 are connected to the positive main through branches arranged in parallel, each lead having two branches, one passing through a switch 12, 44 - - 47 operated bv the appropriate member of the ticket-selecting and issuing machine, the other being completed through the corresponding device on the ticketdating and cancelling machine or a hand-operated switch for freeing the turnstile for the desired number of people. On operating the ticket-selecting machine and issuing machine - for three tickets for example,-the switch 45 is closed and a circuit is completed through the lead 49, solenoids 57, 56, 29, to the negative main. Holding circuits for these solenoids are immediately completed by the closing of the switches 118, 112, 106. The solenoids 73 - - 71 are similarly operated. The operation of the solenoid 29 closes the switch 108 completing the circuit for a solenoid 142 that operates the switch 143 for the locking-bolt solenoid 21. The turnstile 13 carries a drum 145 with a middle contact strip, always engaged by a brush 147, connected to the negative main, and spaced vertical strips 148 extending from the middle strip and adapted to be engaged, as the turnstile rotates, by brushes 144, 146. In the position of the turnstile when the ticket-issuing machine is operated a circuit is completed from the brush 147 across a strip 148 to the brush 144 and through the switches 126, 122 to the switch 121, thus shorting the holding circuit for the solenoid 73. This solenoid therefore is de-energized immediately the circuit through the ticket-issuing machine is broken, thus closing the switch 123. As the first person passes through the turnstile the drum 145 rotates and a circuit through the brush 146, switch 123, and switch 119 is closed to short the holding- circuit of solenoid 57; the switch 120 is released and closes and, in the final movement of the first person through the turnstile, a circuit is completed from the brush 144, the switch 120, and the switch 116 to short-circuit the holding circuit of solenoid 72. The passage of the second person through the turnstile similarly first de-energizes solenoid 56 and then solenoid 71 and finally, on the third person rotating the turnstile, a circuit is completed through brush 146, switch 111, and switch 107 to de-energize solenoid 29, thus breaking the circuits of the solenoids 142, 21 and permitting the bolt 20 to move into locking position. In a modification, a pivoted armature is swung through an angle proportional to the number of persons for which the turnstile is freed by closing a circuit through the appropriate one of a series of solenoids arranged round the armature; an escapement permits the armature to move step by step back to its original position as the persons pass through the turnstile, the escapement being operated by a solenoid controlled by contacts on the turnstile. In a further modification a p@ger i; lifted to the appropriate one of a series of solenoids arranged one above the other and @l step by step, being controlled by an escapement operated electrically by the movement of the turnstile.