Patents Examined by Chi K. Lau
  • Patent number: 4598275
    Abstract: A proximity monitoring system for individually identifying an object or person, and having a central information processor, and a signal receiver, several remote detectors in various locations at a distance from the information processor, each having a first transmitter for communicating with such processor and having a second transmitter and a receiver, and several individual personalized portable identifiers, each identifier having a continuously activated receiver, a signal transmitter which is normally de-activated, a battery pack, and a switch operated by the receiver in response to a signal from a detector, to switch the battery on to activate the transmitter, for emitting a personalized coded identification signal.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: July 1, 1986
    Assignee: Marc Industries Incorporated
    Inventors: Clive Ross, Ralph P. Devoy
  • Patent number: 4596980
    Abstract: A light-emitting indicator comprising: a housing having a longitudinal bore therethrough, a moveable member at least partially positioned within said bore, a light-emitting diode operable as a function of the position of the moveable member within the bore, a lens for displaying the light emitted from said light-emitting diode, and a bore provided in the upper portion of the moveable member for containing the light-emitting diode within the moveable member when the indicator is in its first operative position.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: June 24, 1986
    Assignee: B.W.B. Controls, Inc.
    Inventors: Ned Bergeron, Theodore A. Stollberg
  • Patent number: 4591823
    Abstract: A traffic speed surveillance system is provided by a set of monitor transceivers (8, 10 and 12) located along a roadway (14) and communicating with a central processor (22), and including at least some stationary transceivers (8 and 10) sending radio signals indicative of speed limit in the location of the particular stationary transceiver. A vehicle transceiver (6) mounted in a vehicle (2) includes means for entering driver identification (36) and vehicle identification (48), and speedometer means (46) for measuring the speed of the vehicle. The vehicle transceiver receives the radio signals from the monitor transceiver indicative of speed limit and compares measured speed against the limit, and sends radio signals indicative of driver identification, vehicle identification and speed limit violation to the monitor transceiver for reporting to the central processor.
    Type: Grant
    Filed: May 11, 1984
    Date of Patent: May 27, 1986
    Inventor: George T. Horvat
  • Patent number: 4575713
    Abstract: A disturbance alarm comprising a hollow tubular case having upper and lower electrical contact plates fixedly positioned therein. A pendulum assembly includes a lower weight which rests upon the flat upper surface of the lower contact plate, an upper weight and a rigid shaft fixed to the weights and spacing the weights from each other. The upper electrical contact plate encircles the pendulum shaft and is adapted to make electrical contact therewith to close an electrical circuit through an alarm device. A collar is slidable within the case for clamping the lower weight onto the contact plate such that the pendulum is balanced thereon out of electrical contact with the upper contact plate. A magnet encircles the pendulum shaft adjacent to the upper weight for attracting and holding the pendulum in electrical contact with the upper plate when such balance is disturbed and an alarm condition is thereby detected.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: March 11, 1986
    Inventor: Bert W. Piper
  • Patent number: 4574275
    Abstract: A battery charge indicator circuit includes a voltage regulator 3 which maintains the voltage at a supply terminal 202 of an alternator rectifier 2 at a first predetermined value. A diode 404 and an indicating lamp 7 are connected in series between the alternator and a battery 5, and a switching circuit 406, 407 is connected between ground and the junction of the diode and indicating lamp. A capacitor 408 is connected in parallel to the switching circuit, and a Zener diode 403 causes the switching circuit to conduct when the supply terminal voltage reaches a second predetermined value higher than the first predetermined value. The charge on the capacitor causes the indicating lamp to remain illuminated to warn the driver that the battery is not being charged, in spite of the Zener diode being cyclicly rendered conductive and non-conductive.
    Type: Grant
    Filed: March 21, 1983
    Date of Patent: March 4, 1986
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsuharu Morishita, Shinichi Kouge
  • Patent number: 4573043
    Abstract: Alarm producing apparatus for safeguarding a container carried by a messenger including a time countdown system and a status detection system assuring that container and messenger remain together. Countdown time is set sufficiently to allow normal delivery of container by messenger. Smoke, sound and/or visual signals are triggered by separating container from messenger or by excess time lapse occurring during delivery of container by messenger.
    Type: Grant
    Filed: June 20, 1983
    Date of Patent: February 25, 1986
    Assignee: Captor Holding B.V.
    Inventors: Johannes G. J. Heuker of Hoek, Cornelis J. Clement, Ernst M. van der Lee
  • Patent number: 4571580
    Abstract: A movable permanent magnet (38) is moved by a rotating rig (29, 30) driven by a spiral thermometer (27). This magnet is designed to activate an interrupter (43) of an electric circuit housed in a sonic detecting-warning device (44) capable of rotating on the periphery of a housing 11. The circuit also comprises a battery (45) and a buzzer (46). When the magnet (38) rotates past the interrupter (43) it causes the interrupter to close, thereby actuating the buzzer (46). The angular position of the detector (44) is selected according to the temperature at which the warning signal is to be given.
    Type: Grant
    Filed: April 18, 1984
    Date of Patent: February 18, 1986
    Inventors: Hans R. Winteler, Charles-Andres Favre
  • Patent number: 4570152
    Abstract: A method and apparatus are described for monitoring the condition of a rotating pneumatic tire on a moving vehicle. A plurality of magnetic studs are embedded into the body of a pneumatic tire at the selected points about the periphery thereof. A magnetic field sensor is mounted upon a non-rotating portion of the vehicle adjacent to the tire and is utilized to detect the magnetic field pulsations generated by the rotating plurality of magnetic studs. As the temperature of the tire increases, toward imminent failure, or tread separation, the heat generated will decrease the magnetic field associated with the magnetic studs. When the temperature increases to a selected point and the magnetic field decreases accordingly, a display device is utilized to generate a visual and/or audible indication of imminent tire failure.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: February 11, 1986
    Assignee: Hyperion Corporation
    Inventors: Jack D. Melton, Collin J. McKinney, James A. Reimund
  • Patent number: 4565991
    Abstract: A chime generator circuit of the type employed to monitor the condition of parameters associated with an automobile, such as warning functions involving headlight operation, fastening of a seat belt, or indications of the ignition key having been inadvertently left in place as the driver is leaving the vehicle, etc. The circuit employs an oscillator which is modulated at a relatively low frequency, on the order of one or two cycles per second, and a unique coupling arrangement for exciting one of the existing speakers of the automobile radio to provide the necessary audible sound. In the disclosed device, the output of a signal generator is fed directly to one speaker, and a switch is interposed in the line extending between the radio output and the speaker. When the switch is open, the radio and speaker are isolated from one another and the generator feeds the speaker directly, producing the desired sound and warning the driver that a certain condition exists.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: January 21, 1986
    Assignee: Casco Products Corporation
    Inventors: Peter J. Lupoli, Brooke N. Westover
  • Patent number: 4565995
    Abstract: An anti-energy diversion system for mounting underneath the cover of a standard electric utility meter in order to sense common meter tampering events and indicate the occurrence of such events. A non-battery energy storage circuit extracts energy from the AC power line available in the meter to power the system even during power outages. A flashbulb associated with a heat sensitive indelible indicator is coupled to the energy storage circuit when any one of several tamper event sensor switches are closed. When a tamper event is sensed, a brilliant flash of light is discharged and the appearance of the indelible indicator is transformed.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: January 21, 1986
    Assignee: Energy Optics, Inc.
    Inventors: John H. Stokes, John I. Clark, Charles E. Maxwell
  • Patent number: 4558299
    Abstract: A traffic light structure having a housing including a front portion; a colored lens mounted in the front portion and facing along a roadway to be controlled; a reflector in the housing behind the lens; a main lamp between the reflector and the lens; an electric power source in control of illumination of the main lamp to stop traffic when the main lamp is illuminated; a divider in the housing between the reflector and the lens and operative to divide the space therebetween into a major zone including said main lamp and a non-communicating minor zone of lesser size located offset from the center of the lens; an auxiliary light source in the minor zone and disposed when illuminated to illuminate the portion of the lens overlying the minor zone; and a blinker for intermittently flashing the light from the auxiliary ligh source when the main lamp is illuminated, the divider having an outer portion adjacent to the lens, and the shape of the outer portion of the divider determining the contour of the portion of the
    Type: Grant
    Filed: November 25, 1983
    Date of Patent: December 10, 1985
    Inventor: Donald M. Conn
  • Patent number: 4551713
    Abstract: A low voltage battery powered door mat alarm having an alarm buzzer circuit with mat circuit contact closure by the weight of the pet such as a cat walking across the mat to or from an animal pet door. This activates the buzzer to indicate generally that the pet is approaching the door to go out or has just returned through the pet door with the mat positioned just inside the door so the pet must pass over the mat to go out or come in through the door.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: November 5, 1985
    Inventor: Joseph W. Aossey
  • Patent number: 4550313
    Abstract: A fire detecting system is disclosed, which comprises a sensor for producing an output voltage representing smoke level, heat, etc., and a comparator for producing a fire signal by comparing the output of the sensor or the differential or integral of the sensor output and a reference voltage. The sensor output or the differential or integral thereof is held in a peak hold circuit to be transferred through a switch to a sample-hold circuit for storage there.
    Type: Grant
    Filed: May 19, 1983
    Date of Patent: October 29, 1985
    Assignee: Nittan Company, Limited
    Inventor: Tetsuo Kimura
  • Patent number: 4536751
    Abstract: A system for detecting an alarm for emergency situations of a door or a window of a building or house in a predetermined guard area, comprising: an alarm circuit, including a plurality of alarm switch units for detecting emergencies and a resistor and a capacitor connected between first contacts and second contacts of the alarm switch units; and an alarm device, including a detecting circuit for detecting voltage changes of a predetermined measuring point, a pulse oscillator for generating a pulsating voltage, and a transistor for repeatedly turning on and off the current in response to the pulsating voltage applied from the pulse oscillator.
    Type: Grant
    Filed: June 23, 1983
    Date of Patent: August 20, 1985
    Assignee: Secom Co., Ltd.
    Inventors: Mineo Shigemitsu, Ichiyo Maruyama, Shigeru Niimura
  • Patent number: 4531118
    Abstract: A monitoring circuit is provided for a metal detector which includes a metal sensor for producing a sensor signal in response to the passage of a metallic object through a rotating apparatus and a tachometer for producing a tachometer signal at a frequency proportional to the rate of rotation of the rotating apparatus. In accordance with the invention, the monitoring circuit comprises an adjustable tracking filter responsive to a predetermined control signal for tracking the frequency of the sensor signal in a predetermined fashion and a control circuit responsive to the tachometer signal for producing the control signal.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: July 23, 1985
    Assignee: Dickey-john Corporation
    Inventor: David M. Beams
  • Patent number: 4528547
    Abstract: The disclosure goes beyond prior art that shows G-level sensors which merely actuate warning bells, etc., in that the display is of the number of excesses of G-level per unit time. According to the invention, the rate at which a person exceeds a pre-set limit of G-level is a measure of the violence of his driving. Besides this novel form of display or presentation, a novel G-level sensor is disclosed. The sensor comprises a short length of polyethylene tubing, sealed with polyethylene plugs and containing a blob of mercury. The tube is bent over a saddle to provide a central curved portion and two straight arms. Wires are pushed through the walls of the tube near the ends of the arms, to act as electrical contacts. The disposition of the sensor is such as to virtually ensure freedom from spurious signals due to sloshing of the mercury, by using the mercury's own surface tension.
    Type: Grant
    Filed: June 28, 1983
    Date of Patent: July 9, 1985
    Inventor: Peter W. Rodney
  • Patent number: 4516114
    Abstract: Magnetic door locks characteristically include a high strength electromagnet and a mating plate made of magnetically permeable material, or door strike, mounted on the door frame and the door, respectively. In addition, in order to determine whether the door strike is in engagement with the electromagnet, detection arrangements are provided; and in the present case, simplified detection arrangements are provided by separate portions of the electromagnetic core separated by non-conducting shims or the like, and the closing of a detection circuit extending between the two portions of the electromagnetic core by the magnetic and electrically conducting door strike bridging between the two sections of the core. In addition, the detection circuit may be electrically connected in parallel with electromagnet energization circuit, to positively indicate both that the electromagnet is energized and that the door is closed.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: May 7, 1985
    Assignee: Securitron-Magnalock Corp.
    Inventor: Robert C. Cook
  • Patent number: 4513277
    Abstract: A low fuel indicator system 10 for a motor vehicle comprises a light-emitting indicator 12 which is energized or de-energized by an output signal derived from a voltage comparator 14 which receives a reference voltage from a reference voltage source 20 and a variable voltage signal from a time delay circuit 22, which variable voltage signal is derived from a voltage signal generated by a fuel level sensor in a fuel tank of the vehicle. The light-emitting indicator 12 is energized when the fuel level in the fuel tank falls below a predetermined low level, and time delay circuit 22 operates to isolate the voltage comparator 14 and light-emitting indicator 12 from temporary variations in fuel level produced by "fuel-slosh" in the fuel tank caused by variations in the motion or orientation of the motor vehicle.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: April 23, 1985
    Assignee: General Motors Corporation
    Inventors: John T. Moore, Peter E. Corrigan, James A. Gardner