1,058,907. Locks. CARD KEY SYSTEMS Inc. July 23, 1963, No. 29105/63. Heading E2A. A locking system comprises a lock mean electrical actuator means for the lock means and having an electric circuit control switch means in the electric circuit and electrical operating means for the control switch means and having an electric circuit including adjustable code setting switch means and code matching switch means, the electrical operating means being operable upon matching of the code setting and code matching switch means to complete the electric circuit of the actuator means through the control switch means, whereby to effect actuation of the lock means to its unlocking position. As shown in Fig. 4 a security booth comprises side walls an entrance door 18, an exit door 24, a floor structure 26 and a roof structure 28. The entrance and exit doors 18 and 24 are of hollow construction, and are provided with closure devices 68. One wall carries an electrical control panel 70 Fig. 19 which is concealed behind an operating panel 72 Fig. 4 which is locked to the control panel by a combination lock 78. Access to the booth from the entrance side is gained by pulling on a door pull 80 which encloses a microswitch 94 Fig. 5 (not shown) in an electric circuit, Figs. 20, 21, 22 (not shown) which prevents opening of the exit door during opening of the entrance door and completes a circuit for an entrace door latch solenoid 120 Fig. 9, (not shown) to withdraw a latch bolt 106 Fig. 1, (not shown). A pivoted floor mat 248 Fig. 4 within the booth is supported by a spring 244 Fig. 18, (net shown) which is overcome by a person standing on the mat to close a microswitch 252 in an electric circuit which prevents either of the doors from opening while the booth is occupied. The person may however leave the booth through the entrance door by pushing on a box cap 98 on the inner side of the door to close a micro switch in another electric circuit which includes the solenoid 120. The exit door may only be opened by the person in the booth if that person is apprised of a code which has been set as follows: The lock 78 is operated to release the operating panel 72 to expose the control panel 70. If the code to be operated is assumed to be the letters K and Z, the numeral 10 and the use of a card key switch 382 in that order, the code is set by an operator who first dials pointer 390 to letter K which causes simultaneous rotation of a rotary switch member 392 carrying contacts 394 and 396 each of which is connected to push button switches 482 A-K. The letter Z and numeral 10 are similarly set by dial pointers 400 and 402 respectively. Sequence dials 404, 406, 408 and 410 are then set to 1, 2, 3 and 4 respectively, to operate sequence switches 412 which connect each of the contacts 396 to an appropriate line 420, 422, 424 or 426. A second sequence switch 432 is associated with each of the first sequence switches for detecting improper setting of the code. Switches 450, 453 and 454 are then set to "in use" positions and switches 456, 458, 460 are set to "in sequence" position. A "fast exit" switch 374, a door alarm switch 320 and a "wrong button" alarm switch 470 are set to "on" position, a button bypass switch 472 and a card key and button bypass switch 474 are set to "off" position and the switch 338 set to the position in which the entrance door is locked if a wrong selector button is pushed. The operating panel is then closed and relocked by means of the locks 78. The person in the booth then presses buttons 480 (letters K, Z and numeral 10) Fig. 4, which are in registry with the corresponding push button switches 482 and then slides a card key into a card key switch 382 (Fig. 21). The card key comprises a plurality of magnetic elements confined between layers of non-magnetic material and conforming to a pattern of magnets confined within the switch assembly, the arrangement being such that the card key functions to attract the magnets in the switch to release a movable member in the latter so that the card key may be inserted fully into the switch assembly to effect closure of contacts 384 in an electric circuit which includes switch 412c, switch 460 and an exit door solenoid 170, Fig. 20 (not shown) activation of which releases an exit door latch bolt 154, Figs. 12-14 (not shown) to allow the exit door 24 to be pushed open. The switching of the electric circuits involved in the code setting and operation are controlled by electromagnetic relays, Figs. 20, 22 (not shown) supplied by mains energized transformers and a standby electric battery. Provision is made in the circuitry for preventing operating of certain relays associated with the code setting in the event of incorrect buttons being pressed and of buttons being pressed in the wrong sequence and for activation of alarm signals in such circumstances. If switch 338 is set to its alternative position, neither door can be operated by a person in the booth who has operated the press buttons incorrectly. The exit door may be operated by means of the card key only, if the switch 472 is set to its alternative position. Exit through the booth is made by a pull on the handle 80' of the exit door 24, which after being reclosed from the inside permits opening from the inside, of the entrance door 18. The latch bolt mechanism for the entrance door includes an emergency release to the outside and comprises a plunger 130 Fig. 10 which is confined behind an emergency glass 142 by a spring 136. The plunger engages through a pin and slot connection a shaft which is normally rotated by the solenoid 170 to operate the latch bolt, but which upon breakage of the glass 142 allows the plunger 130 to operate the shaft to withdraw the latch bolt 154. The glass 142 is mounted on the operating panel which is also provided with a hammer 642 carried by a cord on a spring loaded reel. A similar arrangement is provided for effecting emergency exit into the booth through the exit door.