Conducting Key Patents (Class 70/DIG46)
  • Patent number: 5727408
    Abstract: A key device includes a signal processing device for generating a signal containing specific information, a key plate having a stem and fitting device for fitting the signal processing device and the stem, the fitting device provided with the stem and the signal processing device, the fitting device of the signal processing device being formed while preliminarily resin-molding.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: March 17, 1998
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Takashi Mizuno, Sadao Kokubu, Hisashi Aoki, Shinichi Koga, Yoshiyuki Mizuno
  • Patent number: 5633975
    Abstract: An optically responsive electronic lock is disclosed comprising an optical fiber serving as a key and having Bragg gratings placed therein. Further, an identification system is disclosed which has the optical fiber serving as means for tagging and identifying an object. The key or tagged object is inserted into a respective receptacle and the Bragg gratings cause the optical fiber to reflect a predetermined frequency spectra pattern of incident light which is detected by a decoder and compared against a predetermined spectrum to determine if an electrical signal is generated to either operate the lock or light a display of an authentification panel.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: May 27, 1997
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Charles K. Gary, Meric Ozcan
  • Patent number: 5616966
    Abstract: An anti-theft system for a motor vehicle includes a portable transponder carrying code information. A stationary transceiver has an oscillator and an oscillating circuit being excited to oscillate by the oscillator at an oscillation being modulated by the transponder in synchronism with the code information. A demodulator demodulates the modulated oscillation of the oscillating circuit. According to one embodiment, the code information is obtained from the demodulated oscillation by sampling the oscillation at least at one predetermined sampling time. An arithmetic unit compares the code information with command code information and transmits an enable signal to a security unit if a match occurs. The modulated oscillation being shifted by a predetermined phase angle is sampled once again if initially no code information is recognized from the demodulator.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: April 1, 1997
    Assignee: Siemens Aktiengesellschaft
    Inventors: Armin Fischer, Stefan Haimerl, Manfred Glehr
  • Patent number: 5594284
    Abstract: A vehicle security system disables various electrical systems throughout the vehicle. A unique double-sided security key is used to complete the various circuits of the chosen electrical systems by matching physical codes on the key to that of an installed receiving unit mounted within or about the dashboard of a vehicle. The various combinations created by the coded key make a determination of how the various circuits are broken. The method of attempting to re-connect the circuits by trial and error is prohibitive to a would-be thief. The unit can be used to disable an automobile, boat, motorcycle, RV, etc. The device may include one or more blocking diodes within the circuits to produce false readings during attempted tampering.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: January 14, 1997
    Assignee: George Hill
    Inventors: George H. Hill, Steve S. Sahebjam
  • Patent number: 5548163
    Abstract: A security device for use with audio and video equipment installed in an automobile or other type of vehicle, such as a van or boat. The security device includes a module which is coupled to the equipment to be protected. The security device comprises an encoded security key which is plugged into a key receptacle to disarm and arm the module. The key includes logic for producing an encoded disarming signal and is of a size which can be easily carried on the person of the user. The module can be located at a space in the vehicle which is remote to the key receptacle thereby allowing otherwise inaccessible equipment to be conveniently secured from the passenger compartment of the vehicle for example. Without a proper encoded key, the equipment cannot be operated and is virtually useless if removed from the vehicle. To provide a further deterrent to theft, the module and/or equipment include a warning notice signifying the inoperative nature of the equipment without the key.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: August 20, 1996
    Assignee: Blade Technologies Inc.
    Inventor: John B. French
  • Patent number: 5398532
    Abstract: A circuit module for a vehicle ignition lock. The circuit module houses a pair of electrical contacts on either side of a key way for closing a circuit between the contacts and a resistor provided in a key. The circuit module includes a cover and base adapted to be secured to one another for enveloping and securely holding a wire set within the module and for positioning the contacts in proper alignment with the key way. The circuit module is adapted to fit into a cylindrical cavity provided in a bezel of the lock.
    Type: Grant
    Filed: January 14, 1993
    Date of Patent: March 21, 1995
    Assignee: Briggs & Stratton Corporation
    Inventors: David C. Janssen, Vilnis Gagainis
  • Patent number: 4945872
    Abstract: A disabling device for electronic circuits includes a female connector with an easily accessible front surface and an inaccessible rear surface. A large array of contact pairs are found in the female connector. A predetermined number of input/output wires join the female connector in series with the circuit across randomly selected contact pairs in the array. A number of non-functional dummy wires also connect in the array to further complicate the non-uniform connection pattern. When a male connector containing an internal arrangement of jumper wires is inserted into the female connector, the jumper wires short across the proper contact pairs and close the circuit. Subsequent removal of the male element again opens and disables the circuit.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: August 7, 1990
    Inventor: Paul E. Embry
  • Patent number: 4642734
    Abstract: A key base or carrier permits a user to attach any off-the-shelf integrated circuit chip in dual in-line packages (DIP) thereto to form a switch-like device merely by bending the chip leads around the edges of the carrier. The carrier, with chip attached, is inserted into a housing between the rows of posts of a standard wire wrap socket and is rotated after insertion to wipe the bent chip leads on the socket posts to insure good electrical contact to the posts. The socket portion of the wire wrap socket assembly can then be used to plug in a ribbon cable, fitted with DIP headers (plugs) on each end, to transfer the electrical connections of the chip to the product circuit board. An independent switch, affixed to the wire wrap socket housing and actuated by the chip carrier, after all connections are made, signals the user's circuit that the chip is in place.
    Type: Grant
    Filed: December 9, 1985
    Date of Patent: February 10, 1987
    Assignee: Research, Incorporated
    Inventor: James R. Anderson
  • Patent number: 4420794
    Abstract: A key device carries an integrated circuit chip or dual in-line package (DIP) and permits connecting the chip into a circuit board such as a logic circuit board of a computer terminal, from an exterior opening of the housing or cabinet carrying such circuit board. The key device connects any desired chip electrically to spring contacts of a socket located in alignment with the exterior opening. The socket in turn is connected through a ribbon cable for example to a connector on the circuit board at some desired location within the housing. The chip carrying key device is rotated after insertion to insure good electrical contact. When the key is to be removed, the key device is rotated to a position where it is electrically disconnected from the socket leads and can be removed from the housing. The chip can be reprogrammed if desired.
    Type: Grant
    Filed: September 10, 1981
    Date of Patent: December 13, 1983
    Assignee: Research, Incorporated
    Inventor: James R. Anderson
  • Patent number: 4393672
    Abstract: A cylinder lock and key assembly for effecting a mechanical and/or electromechanical locking with recodable tumbler devices and devices which influence or generate electrical currents is provided. The assembly includes a key, a cylinder housing, a lock cylinder and a keyway disposed in the flat rib of the lock cylinder housing which receives the rotatable cylinder. The key and the keyway are provided with cooperating, exchangeable and codeable mechanical devices, e.g., pins, for a mechanical locking and devices which generate or influence electrical currents, e.g., resistors, inductors, capacities or semiconductors, for effecting an electromechanical arresting or other signal triggering.
    Type: Grant
    Filed: August 13, 1980
    Date of Patent: July 19, 1983
    Inventor: Egon Gelhard
  • Patent number: 4148372
    Abstract: A resistor coded anti-theft system particularly adapted for incorporation as original equipment on a motor vehicle is disclosed. The ignition system is defeated unless an ignition key having both the proper mechanical code and proper code resistor is used to start the vehicle. A selectively destructible fuse device is incorporated in the circuitry to permit determination of the value of the proper code resistor during a final stage of vehicle assembly.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: April 10, 1979
    Assignee: General Motors Corporation
    Inventor: Thaddeus Schroeder
  • Patent number: 4117701
    Abstract: This invention relates to a locking device having a latching element movable between a locking position and an inoperative position, operating means for moving the latching element, a blocking member movable to a blocking position for mechanically preventing the latching element from moving to its inoperative position. According to the invention, a plurality of thermally responsive elements are arranged or are individually bendable to form thermally responsive holding means for adopting a holding condition to temporarily hold the blocking member in the blocking position and, preferably, also to form thermally responsive safety means for normally adopting an inoperative condition.
    Type: Grant
    Filed: August 11, 1977
    Date of Patent: October 3, 1978
    Inventor: Luigi Giovanni Del Mei