GB867663A - Improvements in or relating to electrical locks - Google Patents

Improvements in or relating to electrical locks

Info

Publication number
GB867663A
GB867663A GB827657A GB827657A GB867663A GB 867663 A GB867663 A GB 867663A GB 827657 A GB827657 A GB 827657A GB 827657 A GB827657 A GB 827657A GB 867663 A GB867663 A GB 867663A
Authority
GB
United Kingdom
Prior art keywords
discs
circuit
receptacle
key
detector devices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB827657A
Inventor
Thomas Marmaduke Constab Lance
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bush and Rank Cintel Ltd
Original Assignee
Bush and Rank Cintel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bush and Rank Cintel Ltd filed Critical Bush and Rank Cintel Ltd
Priority to GB827657A priority Critical patent/GB867663A/en
Publication of GB867663A publication Critical patent/GB867663A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00Individual registration on entry or exit
    • G07C9/00174Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00658Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys
    • G07C9/00722Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with magnetic components, e.g. magnets, magnetic strips, metallic inserts

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)

Abstract

867,663. Burglar and like alarms. BUSH & RANK CINTEL Ltd. March 13, 1958 [March 13, 1957], No. 8276/57. Class 118. [Also in Groups XXV and XL (b)] An electrical lock comprises a plurality of detector devices arranged to respond to the presence in predetermined positions in a key receptacle of material having predetermined characteristics by predetermined electric responses which are applied to switching means arranged to respond to only one predetermined set of responses from said detector devices by completing a first electrical circuit. The lock comprises a U-shaped ferromagnetic yoke 5 which is excited by a coil 6 connected to an alternating current supply. Upon one limb of the yoke 5 are fixed a number of ferromagnetic cores 7 each carrying a coil 8, the ends of the cores being spaced from the other limb of the yoke to provide the key receptacle in which a device 9 can be inserted. Each coil 8 is connected to the coil of a relay such as 10g through a circuit comprising a rectifier 11 and a condenser 12 and the relay will only operate if a low reluctance path is provided for the flux through the coil 8. The key device 9 consists of a matrix member 1 which is provided with a number of apertures 2. In some of the apertures are inserted discs 3 formed of material having a high permeability in the axial direction, such as iron powder bonded with a minimum of resin. The other apertures are filled with discs which are not of high permeability but otherwise are as similar as possible to the other discs; the matrix member 1 and the discs are covered with an opaque sheath 4. When the key device is inserted into the receptacle the high permeability discs reduce the reluctance of the magnetic circuits through the corresponding coils 8 and the relays associated with such coils are operated to complete a circuit which opens an enclosure, for example, with which the lock is associated. When the key device is inserted into the key receptacle its end encounters a feeler 13 which operates a make-or-break contact set 14 to remove a short circuit between terminals 15 which are connected to an alarm circuit of known type; the short circuit preventing the operation of the alarm circuit. Instead, one contact set of each of the relays is connected in series between the terminals 15 and the alarm circuit is only short-circuited when the correct key device is inserted in the receptacle to operate the correct combination of relays. Any incorrect key will cause the wrong relays to operate and the short circuit across the alarm circuit will not be completed; the operating circuit will also remain open in such a case. The contact set 16 operated by the feeler 13 keeps the operating circuit open until a key device is inserted in the receptacle. In another embodiment some of the cores 7 are provided with sets of coils so arranged that the coupling between the coils is varied by the presence of the discs 3 in the key device; this variation in coupling is arranged to cause a circuit associated with the coils to commence or alternatively to cease oscillation, the change operating the relay. With this construction, instead of using ferromagnetic discs in the matrix member conductive discs can be used. In another embodiment one wall of the key receptacle contains a radio-active isotope, radiation from which normally energizes a number of semi-conductor detector devices in the opposite wall. When the key device is inserted into the receptacle some of these detector devices are shielded by lead discs in the matrix member and the reduction in radiation changes the output of the corresponding semi-conductor detector devices, the change operating the relays. The detector devices and discs can be arranged in a twodimensional array, and different types of detector devices can be used together.
GB827657A 1957-03-13 1957-03-13 Improvements in or relating to electrical locks Expired GB867663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB827657A GB867663A (en) 1957-03-13 1957-03-13 Improvements in or relating to electrical locks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB827657A GB867663A (en) 1957-03-13 1957-03-13 Improvements in or relating to electrical locks

Publications (1)

Publication Number Publication Date
GB867663A true GB867663A (en) 1961-05-10

Family

ID=9849391

Family Applications (1)

Application Number Title Priority Date Filing Date
GB827657A Expired GB867663A (en) 1957-03-13 1957-03-13 Improvements in or relating to electrical locks

Country Status (1)

Country Link
GB (1) GB867663A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2208772A1 (en) * 1971-02-25 1972-08-31 Sony Corp Magnetic testing device
JPS49102499A (en) * 1973-01-04 1974-09-27
JPS49135800A (en) * 1973-05-02 1974-12-27
JPS5097500A (en) * 1973-12-28 1975-08-02
JPS518099A (en) * 1974-07-05 1976-01-22 Kanetsu Kogyo JISHAKUSHIKI JOSOCHI
WO1983001642A1 (en) * 1981-11-10 1983-05-11 Perkut, Branko, R. Key with a non magnetizable body containing conductor parts of ferromagnetic material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2208772A1 (en) * 1971-02-25 1972-08-31 Sony Corp Magnetic testing device
JPS49102499A (en) * 1973-01-04 1974-09-27
JPS5640755B2 (en) * 1973-01-04 1981-09-22
JPS49135800A (en) * 1973-05-02 1974-12-27
JPS5097500A (en) * 1973-12-28 1975-08-02
JPS518099A (en) * 1974-07-05 1976-01-22 Kanetsu Kogyo JISHAKUSHIKI JOSOCHI
WO1983001642A1 (en) * 1981-11-10 1983-05-11 Perkut, Branko, R. Key with a non magnetizable body containing conductor parts of ferromagnetic material

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