Code Responsive Patents (Class 361/171)
  • Patent number: 9686821
    Abstract: Heater modules are configured for streamlined daisy chain connectivity that includes front end and intermediate daisy chain power injection, water resistant heater assemblies, and shielding. A power injection device is configured with connectivity for insertion of power into heater modules that are in front and intermediate daisy chain positions while enabling data communications between heater modules positioned on opposite sides of the power injection locations.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: June 20, 2017
    Assignee: MKS Instruments, Inc.
    Inventors: Jeffrey D. Kiernan, Karl Hausmann, Paul Dozoretz
  • Patent number: 9673730
    Abstract: Provided are a double auxiliary resonant commutated pole three-phase soft-switching inverter circuit and a modulation method. The circuit includes a three-phase main inverter circuit and a three-phase double auxiliary resonant commutator circuit. An A-phase double auxiliary resonant commutator circuit, an A-phase main inverter circuit, a B-phase double auxiliary resonant commutator circuit, a B-phase main inverter circuit, a C-phase double auxiliary resonant commutator circuit and a C-phase main inverter circuit are connected in parallel in sequence and simultaneously connected with a DC power supply in parallel. The present invention can achieve the separation of the resonant current of the double auxiliary resonant commutator circuit from the load current at the moment of current commutation, thereby effectively reducing the current stress of the auxiliary switching tubes and the efficiency can be greatly increased particularly under light load condition.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: June 6, 2017
    Assignees: Northeastern University, Shenyang University of Technology
    Inventors: Huaguang Zhang, Enhui Chu, Xing Zhang, Bingyi Zhang, Xiuchong Liu, Shijie Yan, Huiming Xiong, Xiaochen Yang
  • Patent number: 9495820
    Abstract: Disclosed herein is an electronic combination lock mainly characterized by miniature size and easy-to-use electronic identification access-gaining method that enables a vast variety and type of access codes for user setting and choice. Another battery operated electronic key unit, incorporated with programmed access code to provide as an alternative choice for locking, unlocking and backup power, can be used in conjunction with the electronic combination lock.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: November 15, 2016
    Assignee: DIGIPAS USA, LLC
    Inventor: Hui Hong Jim Kery Li
  • Patent number: 7259953
    Abstract: An embedded control system is provided, which includes a generically applicable computer module, display module, keyboard module, power supply module, and at least one input/output module. The display module is coupled to the computer module by a first communication bus, and the keyboard module is coupled to the computer module by a second communication bus. The power supply module is coupled to the computer module by a third communication bus, and the at least one input/output module is coupled to the power supply module and the third communication bus. The input/output module is adapted for coupling at least one additional input/output module to the third communication bus. The computer module automatically identifies the input/output modules on the third communication bus in response to applying power to the embedded control system. The system is adapted for different applications using software resident in the computer module.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: August 21, 2007
    Inventor: Mark Salerno
  • Publication number: 20040125532
    Abstract: A digital protective relay for power systems includes a memory location for storing information entered by an operator concerning the operation of the relay. Conventional reports of the relay will include a reference to such operator-entered information. This information will include particular actions taken by the operator relative to the relay, as well as notes made by the operator on particular actions and/or entry of and changes to the relay settings. The entered information can be conveniently retrieved by the operator.
    Type: Application
    Filed: December 30, 2002
    Publication date: July 1, 2004
    Inventor: Edmund O. Schweitzer
  • Patent number: 6724607
    Abstract: A driving apparatus of a vibration type actuator includes an apparatus for forming a vibration wave by applying four-phase AC signals having temporal phase differences to four-phase driving phases arranged at intervals of ¼ wavelength, which includes first and second transformers and two-phase driving phases connected to the secondary terminals of the respective transformers, thereby simplifying the arrangement of a driving circuit.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: April 20, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadashi Hayashi, Shinji Yamamoto
  • Patent number: 6608548
    Abstract: The present invention relates to a control device (20) with redundancy for fitting to a lock having a mechanism (21) for locking an unlocking an access door, the device (20) being adapted to manage a change of state of this lock under predetermined conditions and to ensure that this state current is kept current up until the next change of state. This device (20) comprises means (30) for controlling the mechanism (21) and two units (31; 32) for providing like instructions to the control means. This device (20) is characterized in that the first unit (31) has a structure different from that of the second unit (32), while effecting common functions, and in that the control means behave functionally as an AND gate to the inputs of which are applied the instructions from the units respectively, when the device is functioning in a normal situation.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: August 19, 2003
    Assignee: Ilco-Unican S.A./Rehlor Division
    Inventors: Pierre Pellaton, Didier Dominé
  • Patent number: 6567255
    Abstract: An electromagnetic actuator with a control circuit, a combinational circuit and a power section as well as with a magnetic coil, which is connected via electrical lines to the output of the power section, the output signal of the control circuit is passed on to the power section only when, in addition to the output signal of the control circuit, the combinational circuit is fed a release signal. For safety reasons, current is to flow via the magnetic coil only when the release signal is simultaneously available. For monitoring the effectiveness of the combination of the output signal of the control circuit connected upstream of the power section with the release signal with respect to the current flow via the magnetic coil, the voltage of that line which is supplied with the operating voltage on activation of the power section is fed to an evaluation circuit. The evaluation circuit has a threshold switch, which converts the voltage fed to it into a switching signal.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: May 20, 2003
    Assignee: Bosch Rexroth AG
    Inventors: Karlheinz Panzer, Rudolf Stenger, Reiner Vathjunker
  • Patent number: 6259362
    Abstract: A system (10) for a vehicle (12), wherein the system includes transmitter components (26, 28), located at the vehicle, that are operable to send communication that conveys a vehicle system status. A portable receiver unit (14) is operable to receive the communication that conveys the vehicle system status. An operator (76) of the vehicle (12) carries the portable receiver unit (14) upon leaving the vehicle. A controller (22) senses a condition indicative of the vehicle operator (76) leaving the vehicle (12) and enables the communication from the transmitter components (26, 28) to the portable receiver unit (14) in response to the sensed condition indicative of the vehicle operator (76) leaving the vehicle (12). Preferably, a device (44) enables operation of the portable receiver unit (14) in response to the sensed condition indicative of the vehicle operator (76) leaving the vehicle (12).
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: July 10, 2001
    Assignee: TRW Inc.
    Inventor: Xing Ping Lin
  • Patent number: 6222441
    Abstract: An improved circuit and method for connecting a device to an actuator-sensor interface (“ASI”) bus. The circuit provides the proper AC and DC coupling between the device and bus during normal operation, while providing AC and DC decoupling in the event of a short circuit or when the device is disconnected. The circuit accomplishes these goals while advantageously eliminating some of the components used in prior art circuits.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: April 24, 2001
    Assignee: Richard Hirschmann GmbH & Co.
    Inventor: Martin Siegwarth
  • Patent number: 6169650
    Abstract: A way of controlling access to golf cart starter keys, (referred herein as user-keys) is described. A specially coded and specially shaped key, the user-key is given to a golf cart renter once an appropriate rental fee has been paid. In order to start the golf cart, the renter must insert the user-key into a control unit, which is located in the dashboard. When the user-key is properly inserted, the golf cart starts. Furthermore, the user-key is locked inside the control unit and can no longer be removed by the renter, thereby preventing the renters from misappropriating the user-key. When the renter completes the round of golf, he returns the golf cart, along with the unremovable user-key, to the golf club. Only the specially coded removal key in the golf club's possession can remove the user-key from the control unit.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: January 2, 2001
    Inventor: John M. Albrecht
  • Patent number: 6111504
    Abstract: The present invention describes an apparatus and method for an electronic equipment security and recovery system in which the disconnection of electrical power and subsequent movement of the equipment automatically renders the equipment inoperative. Upon obtaining the equipment from the manufacturer, and connecting it to a source of power, the owner inputs a security code into a microprocessor incorporated in the equipment, and enrolls in a security system maintained by a database provider, giving at that time the serial number designation of the equipment, the security code, and appropriate owner identification information. If the equipment were to be stolen--or simply sold or given away--, the removal of the equipment from the power source is sensed, and the equipment rendered inoperative. If the security code is not re-inputted, the then possessor of the equipment usually brings it to a servicing repair facility where, with manufacturer instructions, the serial number designation can be retrieved.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: August 29, 2000
    Inventors: Jeffrey W. Packard, Donald B. Packard
  • Patent number: 6108188
    Abstract: An electronic locking system with an access-control solenoid for controlling the operation of a locking mechanism is substantially immune to "hot-wiring." The locking system includes an actuating circuit for energizing the access-control solenoid. The actuating circuit is responsive to a modulated drive signal of a selected frequency to apply current through the solenoid to retract its plunger, while blocking externally applied DC voltages from reaching the solenoid. When an access code is entered through an input device, a control circuit of the locking system verifies the access code. When the code is verified, the control circuit generates the modulated drive signal to energize the solenoid to retract the plunger, thereby allowing the locking mechanism to be unlocked. After the plunger is retracted, the frequency of the modulated drive signal is changed to reduce the power consumption for retaining the plunger in its retracted position.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: August 22, 2000
    Assignee: Micro Enhanced Technology
    Inventors: William D. Denison, Lawrence C. Brownfield, Bradley S. Silvers
  • Patent number: 6100607
    Abstract: A method of detecting a condition requiring connection of a user apparatus with a feeder line comprises the steps of low-voltage power supplying the user apparatus through a detection impedance (17, 17a); detecting the waveform at the ends of the detection impedance; operating connection of the user apparatus with the feeder line when the waveform at the ends of the detection impedance is distorted in a manner that has been pre-established to be caused by actuation of a command in the user apparatus and requiring full powering of same. A device in accordance with the method comprises an analysis circuit (19, 37) detecting (by comparison with sample waveforms stored in a memory (20), for example) distortion of the waveform at the ends of the impedance (17, 17a) and consequently operating powering of the user apparatus.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: August 8, 2000
    Assignee: Compact S.r.l.
    Inventors: Daniele Olivieri, Massimo Brambilla, Paolo Delgrossi
  • Patent number: 6075356
    Abstract: A power supply control unit for a lamp having a luminous means and an at least partly electrically conductive lamp housing comprises a first and a second line via which a power supply signal can be applied to the luminous means and which are insulated from the lamp housing. The electrical power to be applied to the luminous means is switched or controlled by means of a switching device in the first or second line. A control circuit comprises an oscillator and an evaluation circuit, the oscillator issuing at an output thereof a signal which in terms of frequency differs from the power supply signal and is electrically coupled to the lamp housing. To control the switching device, the evaluation circuit responds to frequency and/or amplitude changes of the oscillator signal brought about by contacting of the lamp housing.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: June 13, 2000
    Inventor: Hermann Kovacs
  • Patent number: 6028760
    Abstract: A pulse generator is provided for energizing a coil with period bipolar current pulses for the purposes of airborne prospecting. The pulses have a generally square waveform, and the pulse generator includes a resonant DC to AC converter circuit including a DC input and an output coupled to the coil. A control circuit is provided for controlling the switching of the converter, and a resonant capacitor is connected in parallel across the DC input. A decoupling diode is provide for decoupling the resonant capacitor from the DC input when the voltage across the resonant capacitor exceeds that of the DC input. The converter includes first and second resonant charging sub-circuits, first and second resonant discharging sub-circuits, first and second freewheeling sub-circuits and first and second exponential charging sub-circuits.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: February 22, 2000
    Assignee: Anglo American Corporation of South Africa Limited
    Inventor: Jan Abraham Ferreira
  • Patent number: 5973411
    Abstract: An antitheft apparatus for a motor vehicle can allow operation of an internal combustion engine of a motor vehicle to be started notwithstanding of decision of discrepancy in an engine start enabling signal ascribable to transient error in communication between a code collating means and an engine start decision means. An identification code stored in an engine key (1) is read out upon every starting of operation of the motor vehicle to be collated with a preset identification code to thereby make decision as to whether or not both of the identification codes coincide with each other. Upon decision of coincidence, the identification code as read out is affixed with a rolling code which is updated every time the engine of the motor vehicle is operated, to thereby generate an engine start enabling signal. Means are provided for sending the engine start enabling signal and for generating the rolling code. The rolling code as generated is sent to the rolling code adding means (30b).
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: October 26, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Tado, Kazuyori Katayama
  • Patent number: 5905446
    Abstract: An electronic security system for controlling access to a plurality of storage locations. The system includes an electronic lock associated with each storage location, a central control terminal for controlling operation of the security system, a programming terminal to program a plurality of keys, and an identification terminal for identifying authorized users of the security system.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: May 18, 1999
    Assignee: DieBold, Incorporated
    Inventors: Randolph C. Benore, Leo J. Grosswiller, Shawn Gibson, Donald Neidlinger
  • Patent number: 5872513
    Abstract: A garage door opener system includes providing temporary access permission for some user or users while maintaining near permanent access permission for other users. The temporary access permission may be controlled by number of uses or a predetermined amount of time.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: February 16, 1999
    Assignee: The Chamberlain Group, Inc.
    Inventors: James J. Fitzgibbon, Paul E. Wanis
  • Patent number: 5841363
    Abstract: A locking system for an automobile, comprises an operating key, an operating key receptacle and an associated operating unit. The operating key and the operating key receptacle have first means for transmitting a first coded operating signal from the operating key to the operating key receptacle. In addition, further second means are arranged in the operating key and in the operating key receptacle, for transmitting a second coded operating signal from the operating key receptacle to the operating key. The second operating signal cooperates with the first operating signal in a bidirectional communication in the manner of an alternating code, activation of the operating unit being made possible in the event of successful deciphering of the first transmitted operating signal.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: November 24, 1998
    Assignee: Marquardt GmbH
    Inventors: Marquardt Jakob, Karl Mueller
  • Patent number: 5781398
    Abstract: A dual fault tolerant control system for controlling power delivered to an actuator from a power source includes decoders which accept commands representing the length of time power is to be applied to the actuator. Controllers process the command and control power inhibits based upon the length of time indicated by the command for supplying power to the actuator. The dual fault tolerant feature allows reassurance that power is applied to the actuator for the length of time dictated by the command.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: July 14, 1998
    Assignee: Honeywell Inc.
    Inventors: Allen J. Fenske, Hendrik C. Gelderloos
  • Patent number: 5684454
    Abstract: An anti-vehicle-thief apparatus having an immobilizer unit for comparing a specific first code received from a transponder to a stored code just after an engine is started, and when these codes are identical, outputting a second code to an EGI unit, the EGI unit for comparing the second code to a stored code, and when these codes are identical, permitting the engine to continue operation, a CPU for counting the number of times that an ignition switch power supply is turned ON and OFF during a code comparison time period, and backup RAM capable of storing the counted number of times that the ignition switch power supply is turned ON and OFF for a predetermined time period. When the ignition switch power supply is turned ON and OFF repeatedly more than a predetermined number of times, the EGI unit causes the engine to stop.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: November 4, 1997
    Assignee: Mazda Motor Corporation
    Inventors: Futoshi Nishioka, Tetsushi Hosokai, Atsushi Okamitsu, Yoshimasa Kitaki
  • Patent number: 5673017
    Abstract: A system for remotely starting a motor of a vehicle and also capable of operating various vehicle accessories such as alarm system, door locks, door windows, trunk latch, etc. The system comprises a portable hand-held transmitter generating a command in the form of a binary coded sequence and a controller mounted in the vehicle for operating the vehicle's motor and accessories in dependence thereon. The system is characterized by a novel encoding scheme of the digitized sequence that prevents command misinterpretation by the controller, thereby avoiding an unintended avocation of the vehicle's motor or another accessory.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: September 30, 1997
    Assignee: Astroflex Inc.
    Inventors: Normand Dery, Guy Mailhot, Alain Jean
  • Patent number: 5617082
    Abstract: An electronic access control system for controlling a lock in which the inputs and outputs are multiplexed, the electrically programmable read only memory is written to and read from in a serial manner, and the operator can disable access codes and enable access codes in one operation. The device reduces power consumption when powering a solenoid or DC motor by pulsing the output power. Further, the device is able to be operated in a remote location whereby the remote device can accept inputs from a keypad, an electronic signal, or a telephone line. The remote device, when not in active operation, operates in a low power mode so that the remote device may be powered by a battery.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: April 1, 1997
    Assignee: Micro Enhanced Technology, Inc.
    Inventors: William D. Denison, Lawrence C. Brownfield, Bradley S. Silvers
  • Patent number: 5614883
    Abstract: An automotive opto-electric starter interlock for use in a motor vehicle for the purpose of preventing the engine from being remotely started unless the transmission is in neutral. The starter interlock includes an optical sensors array mounted to the transmission shift linkage. The output of the sensors is dependent upon the position of the shift linkage, hence allowing to determine if the transmission is in neutral. A microprocessor stimulates the sensors and observes their response to determine the position of the shift linkage. The information supplied by the sensors is also used to detect system malfunctions.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: March 25, 1997
    Assignee: Astroflex, Inc.
    Inventors: Normand Dery, Guy Santerre, Alain Jean
  • Patent number: 5530615
    Abstract: An electronic control for gas furnaces controls a two speed main blower fan and an induction draft fan based on 24 volt input signals from a room thermostat, a high limit and an ignition control including a gas valve. The input signals are coupled to input ports of a microprocessor through current limiting resistors and to AC ground through pull down resistors. AC ground is also connected to the IRQ port of the microprocessor. Output ports of the microprocessor are connected to a relay driver which in turn is connected to relays for energizing and de-energizing the fans. The control calibrates itself on a continuing periodic basis to read the AC inputs synchronously at the peak of their wave and can switch the relays asynchronously based on the Real Time Clock of the microprocessor or can be switched synchronously by providing a selected delay so that contact engagement and disengagement occurs at or near the zero crossing of the AC line voltage wave form.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: June 25, 1996
    Assignee: Texas Instruments Incorporated
    Inventors: Mark E. Miller, Mark A. Eifler, Alan R. Sawyers, Mitchell R. Rowlette, Craig M. Nold
  • Patent number: 5508569
    Abstract: Disclosed herein is a battery driven equipment including an equipment body, a battery pack detachably mounted in the equipment body, a locking mechanism for releasably locking the battery pack with respect to the equipment body, a device for determining whether or not the battery pack is allowed to be removed from the equipment body, and a device for instructing the locking mechanism to lock or unlock the battery pack according to a result of determination by the determining device.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: April 16, 1996
    Assignee: Fujitsu Limited
    Inventor: Tooru Nishino
  • Patent number: 5479151
    Abstract: An electromagnetic door lock system employs an on-board microprocessor which is mounted in the housing for the electromagnet. The microprocessor is pre-programmed with possible operating parameters which are then selected at the installation site. In one embodiment, a contact activatable data reader is mounted at the housing to provide various input data for the microprocessor. The microprocessor is also capable of being interrogated to reveal the preset operating parameters and other information, including the identification of individuals requesting to egress through the associated doorway.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: December 26, 1995
    Assignee: Harrow Products, Inc.
    Inventors: Gary E. Lavelle, Peter S. Conklin
  • Patent number: 5410444
    Abstract: An electronic control system (10) for use in controllably unlocking a locked drawer. Portions of the system (10) are located in the vicinity (12) of the locked drawer and portions are located in a remote location ( 11 ). The system (10) includes an operator accessible switch (14) located in the remote location (11), which switch enables two separate, parallel, redundant unlocking mechanism paths. Each path includes a time delay unit (17) that delays the opening of the locked drawer until a predetermined period of time following activation of the system by the operator, in order to allow time for the operator to move from the remote location to the locked drawer. In addition to providing power to circuitry that unlocks the locked drawer, the system also provides from the remote location, and then decodes at the locked drawer location, an authorization signal. Without this signal, the unlocking circuitry will not unlock the drawer, even in the presence of power.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: April 25, 1995
    Assignee: IDX, Inc.
    Inventor: Scott Juds
  • Patent number: 5402303
    Abstract: One or more loads, commonly solenoids, requiring a high-power drive--typically 500 ma. 7.5 v.d.c.--are selectively actuated by energy that is accumulated over time--typically over several hundred milliseconds--within associated, addressable, energy-accumulating high-power drivers. The energy accumulation is solely from micropowered signals--typically 1 ma., 4.5 v.d.c.--that are received from a control system that is itself micropowered--typically from a high-equivalent-series-resistance power source. The energy-accumulating high-power solenoid drivers (i) accumulate predetermined amounts of energy only as, when, and to such extent as is required, (ii) multiply the voltage (nominally times two) of the received micropowered signals, and (iii) shape the current waveform of the output high-power solenoid drive signals--all as desired so as to optimally both use and conserve energy.
    Type: Grant
    Filed: April 18, 1991
    Date of Patent: March 28, 1995
    Inventors: Jonathan M. Luck, Wyn Y. Nielsen
  • Patent number: 5397929
    Abstract: The present invention relates to an integrated outlet that allows supply of AC power to an outlet receptacle when certain conditions are satisfied. The integrated outlet contains separate modules establish electrical connection with electrical conductors that transmit AC and DC power, telecommunications, control communications, and signals transmitted along a coaxial wire. In a preferred embodiment, these electrical conductors are all disposed on a single ribbon cable. Each module within the integrated outlet can attach to only certain conductors to increase safety in the resulting system.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: March 14, 1995
    Assignee: Building Technology Associates
    Inventors: Peter Hogarth, Kurt Swenson, Charles E. Gutenson, Edward L. Nichols, III
  • Patent number: 5270900
    Abstract: An apparatus for energizing the coil of, and detecting the resultant armature actuation in, a solenoid of the type having a movable armature reciprocable along an axis between first and second positions, a spring bias normally biasing the armature toward the first position, and an actuating coil for inducing a force on the armature tending to move the armature from the first position toward the second position in response to current flow in the actuating coil. A voltage is first provided to the solenoid coil and thereafter, a resulting current flow is differentiated and a zero crossing comparator is utilized to determine when the differentiated current is zero and, therefor, the time at which the sensed current flow reaches a maximum (dv/dt=0). The time at which the armature began to move in response to the resulting coil current may be inferred and the voltage to the solenoid coil interrupted a Predetermined time after the time at which the armature began to move.
    Type: Grant
    Filed: January 13, 1992
    Date of Patent: December 14, 1993
    Assignee: Allied-Signal Inc.
    Inventors: Eric D. Alden, Mark D. Thompson, Ivan L. Harneck
  • Patent number: 5252960
    Abstract: A secure, keyless secondary transmitter unit for use in an automatic garage door operator transmits a code set by a code setting device as modified by digits entered at a keyboard. A controller constructs an identification code by inverting bits of the code set by the code setting device that correspond to entered digits. A radio frequency transmitter transmits this altered code in the manner of known automatic garage door operators. Thus operation of keys corresponding to the bits that differ between the receiver code and the secondary transmitter code controls the door. The keyboard preferably also includes an entry complete key indicating entry of the complete digit sequence and a clear key to restart the digit sequence. A lamp connected to the controller illuminates the keyboard upon operation of any key at the keyboard and is turned off if no key is operated in a predetermined period of time.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: October 12, 1993
    Assignee: Stanley Home Automation
    Inventor: Dean C. Duhame
  • Patent number: 5138986
    Abstract: A novel machine with an internal combustion engine, and practical use-control means to prevent an unauthorized person from starting such engine, and anti-bypass means to prevent a knowledgeable prepared unauthorized person from defeating use-control means within a practical period of time as a feasible means for unauthorized starting of the engine. Use-control means require a proper authorization code be entered into code-input means before enabling engine starting. Anti-bypass means include enclosing parts of the use-control means within a tamper-proof enclosing-component and selecting such parts and components so that use-control means cannot be manipulated to start the engine by an unauthorized user within a practical amount of time. In one embodiment a solenoid component containing a shielded enclosure and two solenoids is attached to the starter-motor of a car or truck using novel one-way fasteners.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: August 18, 1992
    Inventor: Ricardo Aguilar
  • Patent number: 5041810
    Abstract: Automobiles such as a cash carrying car, truck, police car and so on, are prevented from being ridden away during loading or unloading cash or goods or being robbed by robbers after having been forcibly stopped on road. When a door of the automobile is opened, a opened-door detection switch operates and a first-control means stores in its memory the switch's action and cuts off an engine start-up circuit. The engine can be restarted when a registered password is entered into the device through a password inputting means, whereby a second-control means stores the signal and enters a resetting signal into the first control means to restore the engine start-up circuit. At the same time, a resetting signal produced by a reset signal generating means is inputted into the second control means which is thereby restored to the initial state.
    Type: Grant
    Filed: January 29, 1990
    Date of Patent: August 20, 1991
    Inventor: Motohiro Gotanda
  • Patent number: 5021916
    Abstract: A security device intervenes in the primary power input connection to an existing appliance. The user must set numbered thumbwheels to a correct numerical sequence preset through those same thumbwheels by the appliance owner before the device will connect the primary power to the attached appliance. Once the correct code is dialed in via the thumbwheels, a relay latches so that power is continuously available to the appliance until the primary power is lost as by disconnection of the appliance power cord for more than a short period of time. Reentry of the unique code is then necessary to operate the appliance. Labels are permanently affixed to the appliance to forewarn that it is not operational unless the correct code is entered. The attachment module is encased in potting compound to prevent bypassing of the power controlling circuits.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: June 4, 1991
    Assignee: Ultimate Security, Inc.
    Inventor: James H. Hubbard
  • Patent number: 4964014
    Abstract: A solenoid current control system includes a microprocessor which periodically generates a desired peak current value and which energizes the solenoid coil. Current through the coil is sensed via a series resistor and the sensed current is compared to the desired peak current by comparator. The comparator generates an interrupt signal when the sensed current reaches the desired peak value. The interrupt signal is applied to the microprocessor which responds by de-energizing the coil.
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: October 16, 1990
    Assignee: Deere & Company
    Inventors: Thomas E. Boe, Vijay M. Dharia
  • Patent number: 4945210
    Abstract: A card controlled temperature control device for soldering iron in which only a specific person can set and control the tip temperature of the soldering iron. The device comprises a card having a specific identification code, a card identifier for identifying the idententification code, an input section for entering a set value, a set value judging component for judging if the entered set value is in the allowable range or not, and temperature control circuitry controlling the heater of soldering iron on the basis of the set value within the allowable range, whereby the iron tip temperature is allowed to be set and operated by a specific person having a specific card and its misoperation is prevented.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: July 31, 1990
    Assignee: Hakko Metal Industries Limited
    Inventor: Hiroshi Yoshimura
  • Patent number: 4928098
    Abstract: In a method for code protection of an electronic key, a plurality of codes n are stored in a transmitter and in a receiver and a new, coinciding code is automatically set in the transmitter and in the receiver after each transmission and reception event, respectively. The code transmitted by the transmitter contains information for the receiver with respect to which code is to be selected from the stored set of codes as the next code to be utilized.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: May 22, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventor: Friedrich Dannhaeuser
  • Patent number: 4918566
    Abstract: An electronic controller, connected to a digital communication network, is responsive to commands from a master controller to control solenoid operated circuit breakers. The electronic controller also determines the status of all circuit breakers and reports back to the master controller to verify that the command from the master controller was executed and to provide historical data regarding the status of the circuit breakers. The electronic controller is synchronized to the same alternating current (AC) power source as the circuit breakers to control the operation of the respective circuit breakers to minimize electromagnetic interference (EMI) caused by the switching of the circuit breakers. The electronic controller further controls the operation of the circuit breakers to reduce the duty cycle of the power supply for the circuit breaker solenoids.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: April 17, 1990
    Assignee: Westinghouse Electric Corp.
    Inventors: Bruce L. Brodsky, David L. Davidson
  • Patent number: 4916333
    Abstract: To prevent fraudulent action by ill-intentioned users, the detection of the secret codes, contained in a memory card with MOS integrated circuit and transmitted to an input/output unit, is prevented. This is done by interposing a read amplifier in the transmission chain, in the integrated circuit itself. This read amplifier essentially has two parallel-connected identical circuits, designed to take complementary logic states when they receive one and the same logic level to be detected. The result of this is that the electrical comsumption of the amplifier is the same regardless of the logic level transmitted. Thus, it becomes impossible to deduce the nature of the logic level transmitted. As an improvement, the outputs of the detector are provided with bistable circuits which are coupled to each other so as to be capable of taking transitory or spurious information detected into account.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: April 10, 1990
    Assignee: SGS Thomson Microelectronics SA
    Inventor: Jacek Kowalski
  • Patent number: 4896246
    Abstract: Battery power in an electronic lock system is conserved by delaying application of energy to the unlocking mechanism until a movable member, used to open the lock system, is moved.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: January 23, 1990
    Assignee: Supra Products, Inc.
    Inventors: Walter G. Henderson, John Q. Archer, II, Gerald R. Daum, George A. Ellson, John E. Gray, Wayne F. Larson, Rockne M. Olds, Jerry P. Scansen, John W. Sherman, Edgar J. Unrein
  • Patent number: 4888575
    Abstract: The device can be applied to vehicles provided with an electronic control device for the vehicle engine. The protecting device for includes a keyboard for entering a user's code, a microprocessor for converting entered data coming from the keyboard into an output message containing the user's code, programmable and non-volatile memory for storing the code for unlocking the engine electronic control device, a microprocessor for comparing the unlocking code stored in the memory with the user's code contained in said message coming from the keyboard and unlocking the engine electronic control device when there is coincidence of the code contained in the memory with that contained in said output message, and the microprocessor and the memory being capable of effecting replacement of the unlocking code of the engine control device with a new unlocking code through action on the keyboard.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: December 19, 1989
    Assignees: Automobiles Peugeot, Automobiles Citroen
    Inventor: Louis De Vaulx
  • Patent number: 4868409
    Abstract: A vehicular anti-theft system which combines a mechanical key and an electronic key involving a code light signal. A light emitting element is provided in a casing attached to a base end of the shank of the mechanical key while a light receiving element is provided adjacent to an open end of the key hole so that the conventional action of fitting the key shank into the key hole causes the transmission of a code light signal between these elements. Advantageously, the light emitting element can be additionally equipped with the function of locking and unlocking a vehicle door so that the user can obtain the benefits of both a remote control entry system and a highly effective anti-theft engine start system.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: September 19, 1989
    Assignee: Honda Giken Kogyo K.K.
    Inventors: Akira Tanaka, Norimitsu Kurihara
  • Patent number: 4809199
    Abstract: A keyless marine access and engine control system. The system is caused to change from a dormant state to an enabled state when a sequence of actuation signals entered through a keypad matches data representing either one of two access sequences stored in the system's memory. When the system is in its enabled state, the system responds only to signals representing a keypad actuation exceeding a first predetermined time interval. These signals are used to crank, choke, and stop a marine vehicle engine. The secondary access sequence can be changed by a person who knows either the primary access sequence or the secondary access sequence, while the primary access sequence can be changed only by a person having knowledge of the present primary access sequence. In order to reprogram either access sequence, a programming button must be actuated for a predetermined time interval exceeding the first time interval. The system can be used with either a single or dual engine installation.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: February 28, 1989
    Assignee: Electro-Mechanical Products
    Inventors: James P. Burgess, David J. Pearson
  • Patent number: 4796151
    Abstract: An ignition system for vehicle includes switching means which is turned on in response to a given code input. The switching means may be connected in a supply line which provides a connection between a primary coil of an ignition circuit and a storage battery mounted on a vehicle, in a ground line which provides a connection between the primary coil and the electrical ground of a vehicle, or in an energization control line which provides a connection between the base of a switching transistor, acting to pass or interrupt the primary current flow, and its associated base driver, each line being disposed in an ignition circuit. The code may be entered through numerical keys, a combination of a key code emitter and a key code receiver, or a combination of a key card and a card reader. The ignition circuit is completed by allowing the switching means to be turned on only when a code entered matches a specific code which is previously stored.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: January 3, 1989
    Assignee: Aisin Seiki Kabushikikaisha
    Inventors: Toru Asada, Kenichi Komuro, Ryoichi Fukumoto, Nozomu Torii
  • Patent number: 4788623
    Abstract: This invention pertains to a key operated mechanism for producing coded signal combinations for selecting a function of a multifunctional device. The mechanism includes a plurality of magnetically operated switches arranged along a key guide. The key includes magnets specifically positioned for interaction with the magnetically operated switches in accordance with a code diagram. Closing of the switches sends signals to a code signal user, which if the signals are enabling activates an associated machine such as a franking machine.
    Type: Grant
    Filed: December 24, 1987
    Date of Patent: November 29, 1988
    Assignee: Frama AG
    Inventor: Werner Haug
  • Patent number: 4742426
    Abstract: A battery powered electronic lock includes a control for indicating low battery voltage and reserving a portion of the battery's energy for operating the lock upon insertion of maintenance or emergency keys.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: May 3, 1988
    Assignee: Emhart Industries, Inc.
    Inventor: Gary E. Lavelle
  • Patent number: 4723121
    Abstract: A simple and economical, yet tamper-proof, electronic locking apparatus for motor vehicles features an electronic key and an electronic lock, which each contain a synchronized, constantly operating, precision oscillator. The output of each oscillator is applied at a predetermined counting rate to a respective number sequence generator. Both generators contain the same predetermined number sequence, which they step through at the same clock rate, applying the instantaneous value of the count to a first input of a respective computer. A second input of each computer is connected to a fixed memory which supplies a permanent, characteristic code number to the computer. Both the count state and the characteristic code number are combined using corresponding algorithms in the key and in the lock to produce a combination code. The key-produced combination code is sent from a transmitter in the key to a receiver in the lock and compared there with the lock-produced combination code.
    Type: Grant
    Filed: September 9, 1986
    Date of Patent: February 2, 1988
    Assignee: Hulsbeck & Furst GmbH & Co. KG.
    Inventors: Andreas van den Boom, Karl-Heinz Stellberger
  • Patent number: 4697171
    Abstract: An electronic lock and key includes an electronic key which produces a specific electric signal such as a frequency signal, photo signal or logic signal when inserted into the key holder of the lock; and an electronic lock which is comprised of a power source, a key holder, a lock signal generator, and a signal comparing circuit that compares the signal of said key and the signal of said lock signal generator.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: September 29, 1987
    Assignee: Dsung Precision Company
    Inventor: Kyung S. Suh