Responsive To Intruder Energy Patents (Class 340/565)
  • Patent number: 5652567
    Abstract: Security systems which include an adjustable structure and a motion detector which detects changes in electromagnetic energy from within a zone of protection are described. The structure has a base for mounting the motion detector and wall members which extend away from the base and to form walls around the detector. The wall members are adjusted to positions between the plane of the base and planes perpendicular to the base to alter the shape of the zone of protection and conform it to the area or object of interest. The motion detector is electrically connected to a control unit and alarm module which includes a shock sensor and a current sensor. The motion detector and the control unit and alarm module are connected to a power supply and operated by remote control.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: July 29, 1997
    Assignee: C.O.P. Corp.
    Inventor: Norbert Traxler
  • Patent number: 5640141
    Abstract: A surveillance and alarm device for room spaces, comprising an infrared radar for controlling the lights as well as a fire and burglar alarm. A basic alarm is provided with a light controller to be connected in series with a ceiling light fixture in a room under surveillance, and is further provided with a microprocessor or some other intelligent control circuit, adapted to control the alarm actions of said device either on the basis of a command issued by a lamp light switch or a wireless remote controller or on the basis of a command issued by a key switch. The light controller included in the basic alarm switches on said lighting fixture as someone enters a room under surveillance or flashes said lighting fixture in connection with an alarm.
    Type: Grant
    Filed: November 2, 1994
    Date of Patent: June 17, 1997
    Inventor: Matti Myllymaki
  • Patent number: 5629675
    Abstract: A vehicle intruder detection system including at least one pressure operated switch which comprises a first, movable, conductive strip contact and a second, fixed, conductive strip contact. The second contact is attached to a fixed surface located within a vehicle interior so that the first contact is located in proximity, but not fixedly attached, to an internal face of a vehicle window. Each switch is connected into a circuit which incorporates an alarm, which is then triggered by application of a force to the external surface of a window sufficient to bring the first and second contacts together to close one of the switches.
    Type: Grant
    Filed: July 18, 1995
    Date of Patent: May 13, 1997
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: John Connolly
  • Patent number: 5625340
    Abstract: A device for supervising an area (16), in particular the crossing area between railway gates, in order to detect objects occurring in the area comprises a detector (18) adapted to transmit detection signals and receive their reflection caused by objects. The detector (18) is pivotably arranged in a reciprocal manner so as to transmit the detection signals in an angular area. The detector (18) may be a laser, the light of which forms the detection signals.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: April 29, 1997
    Inventor: Kenneth Gustavsson
  • Patent number: 5623172
    Abstract: A two wire detection device includes a relay switch setable to a high and a low impedance state and electrically coupled between a first terminal of an AC source and a first leg of a load, a second leg of which is connected to a second terminal of the AC source. The device includes an energy storage device electrically coupled to the first terminal of the AC source and electrically connected to the first leg of the load. Charge control means interposed between the first terminal of the AC source and the energy storage device regulate the voltage across the energy storage device. A detection control device is electrically connected across the energy storage device and to the switching device for detecting the presence of a condition for monitoring and setting the state of the switching device based thereon such that power is available to the detection control device regardless of the state of the switch.
    Type: Grant
    Filed: July 3, 1995
    Date of Patent: April 22, 1997
    Assignee: Leviton Manufacturing Co., Inc.
    Inventor: Albert Zaretsky
  • Patent number: 5608377
    Abstract: A method of supervising the operation of an intrusion detector having a housing, the method including periodically generating in the housing at least one sound wave signal, sensing an acoustic image formed in the housing in response to the at least one sound wave signal, constructing a sensed signal envelope responsive to the sensed acoustic image, periodically comparing the sensed signal envelope with a reference signal envelope to determine whether a predetermined criterion of similarity between the sensed signal envelope and the reference signal envelope is met and, if the similarity criterion is not met, providing a predetermined, sensible, indication.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: March 4, 1997
    Assignee: Visonic Ltd.
    Inventors: Boris Zhevlev, Mark Moldavsky
  • Patent number: 5604483
    Abstract: A portable, battery operated personal alarm and motion detector has two passive infrared (PIR) elements for sensing motion in two corresponding and oppositely directed fields of view, with each field of view being easily and selectably variable during set-up. A rotatable turret is associated with each PIR element and has several windows such that each window is selectably alignable with the PIR element by manual rotation of the turret. Each of the windows is provided with a lens or lens cluster which, when aligned with the PIR element, defines a different field of view in which motion is detectable by that element. An integrally and pivotally attached base member provides a support by which the device can be tilted to, and maintained in, a selectable orientation for purposes of aiming. Different modes of operation are selectable, including a manually armed alarm mode in which the person carrying the device only needs to depress a panic button in order for the device to emit a high decibel alarm.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: February 18, 1997
    Inventors: John J. Giangardella, Procopio Soriano, Jr.
  • Patent number: 5598042
    Abstract: A device for controlling power to an electrical load. The device has two components: a portable desktop detector unit and an electrical powerstrip. The desktop detector detects the presence of a human in a room and sends signals to the powerstrip to supply power to or withhold power from individual electrical loads connected to the strip. Since the detector is portable, it can be positioned and repositioned at different locations in a room to maximize its ability to detect the presence of a person. The system can also communicate by wireless signals to a wall-mounted control unit to control light fixtures in the room. When used with a wall-mounted control unit, a photo sensor that detects the level of ambient light in a room allows the system to adjust the brightness of lights in the room depending upon the available ambient light level.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 28, 1997
    Assignee: The Watt Stopper
    Inventors: Jerome M. Mix, Charles C. Hu, James M. Young
  • Patent number: 5581236
    Abstract: A multisensor intrusion detection system having greatly improved immunity to false alarms is disclosed. This system employs a first sensor for sensing an intrusion in a volume of space by a first physical phenomenon and a second sensor for detecting an intrusion in the volume of space by a second physical phenomenon different from the first physical phenomenon. The first sensor generates a first signal in response to the detection of an intrusion into the volume of space, and the second sensor generates a second signal in response to a detection of an intrusion. A microcontroller generates an alarm signal upon the occurrence of one first signal and one second signal within a first interval, the occurrence of another first signal within a subsequent second interval and the occurrence of another second signal within a third subsequent interval.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: December 3, 1996
    Assignee: C & K Systems, Inc.
    Inventors: Paul M. Hoseit, Gordon S. Whiting
  • Patent number: 5581237
    Abstract: A microwave intrusion detector is provided with a periodic signal detector that identifies periodic signals not typical of an intrusion and adjusts the alarm threshold in response such identification. The intrusion detector includes an adjustable threshold and a noise compensating circuit that actively adjusts the threshold at a first predetermined rate to mask background noise levels. The periodic signal detector modifies the adjustment, increasing the predetermined rate, when it detects a periodic signal typical of a motor, fan, florescent light or the like. The periodic signal detector also cancels or disables any pending or ongoing alarm to provide sufficient time for the threshold adjustments at the increased rate.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: December 3, 1996
    Assignee: Detection Systems, Inc.
    Inventor: William S. DiPoala
  • Patent number: 5565844
    Abstract: An intrusion detector system employing a remote, 360.degree. infrared detector. The system includes a base unit with a receiver, controller, and phone jack, a remote sensor which is adjustable along a vertical axis and includes a 360.degree. infrared motion sensor, and a central monitoring station in communication with the base unit via a telephone network. The remote sensor may be selectively positioned to detect movement in a surrounding area definable by the user. The base unit may be programmed to contact the monitoring station when the sensor detects motion, and also to receive test signals from the monitoring station and verify that the system is operational.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: October 15, 1996
    Assignee: Guard-Tech Industries, Inc.
    Inventor: Bert S. Bedrosian
  • Patent number: 5559496
    Abstract: A system for detecting the presence and passage of vehicle, pedestrian, or other intrusion and/or traffic within one or more monitored areas. The system detects intrusions of nontransparent objects which interrupt energy projections, records and stores data on certain characteristics of the intrusion(s), and transmits such data to a base station through a communication link. System estimates approximate size, speed and directional characteristics of intruding object(s) with an "expert system". Selected environmental data may be detected and transmitted along with intrusion data. Provision for photographing intruding objects is included. The base station provides user interfaces, processes intrusion data, reports activity, summarizes traffic data, prints reports and stores such data for future retrival. The intrusion detection system is based on energy projection, and does not require a physical presence such as air hoses, switches or inductive devices across the immediate span being monitored.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: September 24, 1996
    Inventor: William C. Dubats
  • Patent number: 5555454
    Abstract: A remote alert system includes an electrical signal transmitting unit located at a first location and a receiving unit located at a second location remote from the first location. The signal transmitting unit includes an electrical circuit either disposed in a module which fits between a light socket and a light bulb of a security light unit or integrated directly in the circuitry of the security light unit. The electrical circuit electrically interconnects the light socket with the light bulb so as to cause illumination of the light bulb in response to activation of the security light unit from an "off" to "on" condition. The electrical circuit also produces and broadcasts an electrical signal in response to such activation of the security light unit. The signal receiving unit includes a housing mountable at the second location and an electrical circuit disposed in the housing.
    Type: Grant
    Filed: September 3, 1994
    Date of Patent: September 10, 1996
    Inventor: Kent L. Dees
  • Patent number: 5550530
    Abstract: A device for supplying power to and monitoring an electric fence, comprising a means connected to an energy source generating high-voltage pulses, a system for digital an electric quantity and a display device, and an alarm circuit.The digital system comprises a microprogrammed electronic integrated digital circuit which, by means of software, analyzes the status of the fence line and/or its degree of insulation on the basis of the data pertaining to the pulses transmitted along the fence line and/or the data relating to the return pulses sent by a transponder. The digitizing system then sends the results of these analyses to the display device, and transmits data to the alarm circuit via a data transmission channel comprising an electrical insulation.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: August 27, 1996
    Inventor: Valery Hamm
  • Patent number: 5534850
    Abstract: An electrical circuit for use in occupancy detectors for preventing false triggering when a load such as a light is de-energized. The occupancy detector includes circuitry for providing an intermediate signal indicating detection of a target object. An output stage receives the intermediate signal and in response provides a trigger signal for energizing the light or other load. An RC network, having a characteristic charge decay time, is coupled to the output stage such that the characteristic charge decay time governs the duration for which the output stage asserts the trigger signal for energizing the light or other load. Output signals from the occupancy-detecting circuitry are applied to the RC network through a first transistor switch. A second RC network, having its own characteristic charge decay time, is provided and the trigger signal is applied to charge the second RC network.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: July 9, 1996
    Assignee: Larry C. Y. Lee
    Inventor: Wade Lee
  • Patent number: 5483922
    Abstract: Apparatus for detecting when birds are in a birdhouse with a heat sensor and illuminating a lamp to give a visual indication of the presence of the bird. A second portion of the circuit gives a visual indication when the bird enters or leaves the birdhouse.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: January 16, 1996
    Inventor: Lance S. Hall
  • Patent number: 5475365
    Abstract: A multisensor intrusion detection system having greatly improved immunity to false alarms is disclosed. This system employs a first sensor for sensing an intrusion in a volume of space by a first physical phenomenon and a second sensor for detecting an intrusion in the volume of space by a second physical phenomenon different from the first physical phenomenon. The first sensor generates a first signal in response to the detection of an intrusion into the volume of space, and the second sensor generates a second signal in response to a detection of an intrusion. A microcontroller generates an alarm signal upon the occurrence of one first signal and one second signal within a first interval, the occurrence of another first signal within a subsequent second interval and the occurrence of another second signal within a third subsequent interval.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: December 12, 1995
    Assignee: C & K Systems, Inc.
    Inventors: Paul M. Hoseit, Gordon S. Whiting
  • Patent number: 5473311
    Abstract: An intrusion detection device of the dual sensing type has a PIR sensor to generate a PIR signal. The device also has a microwave sensor for generating a microwave amplitude signal. The microwave amplitude signal is filtered to generate a microwave high frequency signal which is the high frequency portion of the microwave amplitude signal. These three signals: PIR signal, microwave amplitude signal, and microwave high frequency signals are amplified and are digitized and are processed to generate an event signal. The event signal is compared to an event threshold signal and an alarm is generated in the event the event signal exceeds the event threshold signal. The event threshold signal represents the threshold to distinguish between a human intruder and an animal intruder.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: December 5, 1995
    Assignee: C&K Systems, Inc.
    Inventor: Paul Hoseit
  • Patent number: 5459450
    Abstract: A system for detecting presences has modules or devices equipped with electronic circuits for the transmission and reception of binary messages by carrier current passing through the normal domestic electric network. The devices, connected to the electric network by an incorporated plug, are in addition equipped with actuators for the control (command) of the electric power equipment in order to intercommunicate at an equivalent rank level. This system consisting of an ensemble of several devices of the above-mentioned kind associated with devices having presence-detecting characteristics is capable of carrying out the function of an anti-intrusion alarm installation.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: October 17, 1995
    Assignee: Beghelli S.R.L.
    Inventor: Gian P. Beghelli
  • Patent number: 5440292
    Abstract: An intrusion detector employing a remote, 360.degree. infrared detector. The detector includes a base unit with a receiver, controller, digital dialer and power supply plug, a remote sensor which is adjustable along a vertical axis and includes a 360.degree. infrared motion sensor, and a hand held remote control unit to arm and disarm the base unit. The remote sensor may be selectively positioned to detect movement in a surrounding area definable by the user.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: August 8, 1995
    Assignee: Guard-Tech Industries, Inc.
    Inventor: Bert S. Bedrosian
  • Patent number: 5432498
    Abstract: A sensing cable element including a non-uniform cable which is configured so as to substantially vary along its length in its ability to detect mechanical disturbances.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: July 11, 1995
    Assignee: Magal Security Systems, Ltd.
    Inventors: Moshe Zilbershtein, Zvi Dank
  • Patent number: 5422565
    Abstract: A method and system is disclosed for indication and prevention of tampering with an electricity meter having control circuitry for automatic remote reading. The control circuitry, provided externally of the meter in a base or base extension, to which the meter is connected, is also used for tamper detection. Embodiments of the invention include use of optical sensing, voltage detection and proximity detection. Ambient light sensing may be performed to detect separation of the meter from the external receptacle. Reflected light to a reflective surface of the meter is sensed to determine if the meter is properly engaged. Presence of a meter connection plug element may be sensed either optically or by position responsive switch. Voltage of the utility supply and meter user output may be monitored to determine tampering.
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: June 6, 1995
    Assignee: Schlumberger Industries, Inc.
    Inventor: Scott C. Swanson
  • Patent number: 5371489
    Abstract: An alerting apparatus includes a pair of separate first and second lights capable of providing respective illuminations that are different from one another, an electrical power supply cord connected to the first and second lights for providing a supply of electrical power to activate the lights, and a motion detector connected to the electrical power supply cord and the first and second lights for activating the first and second lights for predetermined times in response to sensing motion in a predetermined area. The first light can provide a constant white illumination, while the second light can provide a flashing red illumination. Also, an alarm can be connected to the motion detector and the electrical power supply.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: December 6, 1994
    Inventors: Lee J. Carroll, Diana D. Harahan
  • Patent number: 5334969
    Abstract: A car security system has a proximity sensor such as a radar sensor with variable sensitivity and capable of producing a detection signal upon detecting motion of a person in a monitoring area. A control circuit is provided controls the sensitivity of said proximity sensor. The system also has a monitoring/alarming control circuit for control of predetermined monitoring and alarming control on the basis of the output from the proximity sensor, and alarming devices such as a headlight flash circuit, buzzer and siren for performing a predetermined alarming operation under the control of the monitoring/alarming control circuit. The sensitivity control circuit operates in response to a predetermined operation such as an arming start operation to vary the sensitivity of the proximity sensor so as to automatically set the sensitivity to a first sensitivity level which is the highest level within a range which does not cause the sensor to produce the detection output.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: August 2, 1994
    Assignee: Alpine Electronics, Inc.
    Inventors: Koichi Abe, Mitsuhiro Murata
  • Patent number: 5325086
    Abstract: A safety device which is responsive to excessive wave motion of a body of water includes a housing having a pivotable telescoping arm connected thereto. A pair of spaced apart probes are mounted on the end of the arm. The probes are connected to a control circuit located in the housing. The control circuit measures the electrical resistance between the two probes, which is normally an open circuit. In use, the arm is manipulated so as to position the probes a desired distance above the normal water level when no one is in the pool. Thus, the space separating the two probes is normally not bridged by water from the pool. When a person enters the pool, however, larger waves are created. These larger waves splash across the probes, bridging the space therebetween. As a result, the electrical resistance between the probes decreases. The control circuit is responsive to this change for generating an alarm. The safety device may also include a pressure responsive switch secured to a step of a ladder in the pool.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: June 28, 1994
    Inventor: Raymond F. Thomas
  • Patent number: 5283549
    Abstract: An electronic security sentry for monitoring a designated area to detect unauthorized intruders comprises a housing that contains a microprocessor controller, a power source, and a two-way radio transmitter coupled to the microprocessor. The microprocessor controller includes storage for storing the digital equivalents of a predetermined set of verbal commands. A set of passive infrared detectors are coupled to the controller and mounted to the housing such that their fields of coverage span the area to be monitored. Upon detection by the sensors of an unauthorized intruder, a signal is conveyed to the microprocessor which selects a predetermined set of digitized verbal commands from its memory, activates the two-way radio in its transmit mode, and conveys the commands in a predetermined sequence to the two-way radio. The sequence of verbal commands are then transmitted by the radio for receipt by the security guards of an adjunct guard force, who can respond to the alarm accordingly.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: February 1, 1994
    Assignee: Intellitech Industries, Inc.
    Inventors: Joseph H. Mehaffey, J. Sutton Mehaffey
  • Patent number: 5276427
    Abstract: An improved dual sensor motion detection system is disclosed wherein the sensitivity of at least one of the sensors is adjusted in accordance with the response signals or signal history received from the sensors. This arrangement has application for systems having at least two sensors and simplifies installation and adjustment of the system.
    Type: Grant
    Filed: July 8, 1991
    Date of Patent: January 4, 1994
    Assignee: Digital Security Controls Ltd.
    Inventor: John Peterson
  • Patent number: 5268672
    Abstract: An intrusion detection system for a space secured in part by a deflectable physical barrier includes a cable sensor mounted on the barrier in such manner that it stretches and flexes in response to deflection of the barrier, thereby to produce an output signal representing such movement. A signal processor receives the signal from the coaxial cable and provides an output affirmative signal if the amplitude of the cable signal, within a predetermined frequency range lying below about 30 Hz, exceeds a predetermined level for a predetermined time interval.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: December 7, 1993
    Assignee: Hitek-Protek Systems Incorporated
    Inventor: Reginald J. Kerr
  • Patent number: 5225808
    Abstract: The apparatus of the invention includes a collapsible antenna for detecting the electric field associated with the individual. A current-to-voltage operational amplifier is coupled to the antenna. The amplifier includes an inverting input, a non-inverting input, and an output. A magnetic feedback path is provided for the amplifier. A magnetic filter is positioned between the amplifier output and the inverting input of the amplifier. An optical coupler is connected to the output of the amplifier. An intruder indicator, such as a signal display apparatus, a signal processor, or an audio indicator is connected to the optical coupler. The intruder indicator may simply provide a signal that an intruder is present or it may provide additional data defining the nature of the intruder.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: July 6, 1993
    Inventor: William C. Olivadotti
  • Patent number: 5202661
    Abstract: A system for detecting intrusion into a secured environment using both fixed and mobile intrusion detectors includes a multiplicity of fixed intrusion detection sensors are each deployed at specific, fixed locations within the environment. The mobile sensors are mounted on one or more mobile platforms which selectively patrol throughout the environment and may be rapidly deployed to any region in the environment where a fixed intrusion detector detects a possible intrusion. A computer receives the outputs of the fixed and mobile sensors and is communicatively coupled to the mobile platforms. The computer directs the mobile platforms to travel through the environment along paths calculated by the computer, calculates a sum of weighting factors associated with the output of each sensor, and fuses the sensor outputs so that the sum is uninfluenced by the traveling of the mobile platforms. The sum is compared to a reference whereby an output is provided when the sum exceeds the reference.
    Type: Grant
    Filed: April 18, 1991
    Date of Patent: April 13, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Hobart R. Everett, Jr., Gary A. Gilbreath
  • Patent number: 5153560
    Abstract: An apparatus for detecting the presence of a person or persons inside a room having a door. The apparatus comprises a pyroelectric infrared sensor and a piezoelectric air pressure sensor. The infrared sensor detects movement of a person and produces a signal indicating the movement. The air pressure sensor detects opening and closing of the door and produces a signal indicating the opening and closing. A logic device including monostable multivibrators, AND gates, and an OR gate is connected between the outputs of the two sensors. When the signal indicating the movement is applied to the logic device later than the signal indicating the opening and closing, the logic device produces a signal indicating the entry of a person. When the signal indicating the opening and closing is applied to the logic device later than the signal indicating the movement, the logic device produces a signal indicating the exit of a person. These signals are processed by the logic device to know the presence or absence of a person.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: October 6, 1992
    Assignee: Sumitomo Metal Mining Company, Limited
    Inventor: Masahiro Ichikawa
  • Patent number: 5151682
    Abstract: Device for fail-safe testing of a condition indicating device including at least one infrared sensor. The infrared sensor is connected by amplifiers to comparators which have different threshold values and have outputs connected to a microprocessor. An infrared signal transmitter is actuated by the microprocessor at periodic intervals to produce signals which are detectable by the infrared sensor. The microprocessor delivers an alarm signal if the test signal is not received by the infrared sensor within a specified period after triggering of the transmitter. The microprocessor also monitors the time occurrence of noise signals produced by the infrared sensor, and produces an alarm if no noise signals are received within a specified period. During monitoring of reception of transmitted test signals, monitoring of the noise signals is interrupted to prevent the test signal reception from being processed as a noise signal.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: September 29, 1992
    Inventor: Waldemar Marinitsch
  • Patent number: 5136621
    Abstract: Swim/sporting event timer/counter. A waterproof housing has upwardly projecting digital displays and two spaced ultrasonic receivers. A swimmer wears an ultrasonic transmitter tuned to ultrasonic receivers. by measuring the time differential for the ultrasonic signals from the transmitter to reach the receivers in the housing, the position of the swimmer (i.e., in front of, directly over, or behind the housing), is determined. Laps are identified by determining when the transmitted signal changes from being received by the two receivers by an increasing time differential to being received by a decreasing time differential. Each time the swimmer passes over the housing, the numbers on the display are inverted so that the swimmer may look down into the water and see the time regardless of which direction the swimmer is traveling in the lane or other predetermined course.
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: August 4, 1992
    Inventors: Mitchell, David E., Dean Lurker
  • Patent number: 5130613
    Abstract: A fluorescent lighting arrangement including a lamp controller for controlling the light intensity of fluorescent lamps in response to a motion detecting arrangement which receives its operating voltage from the lamp controller.
    Type: Grant
    Filed: October 17, 1990
    Date of Patent: July 14, 1992
    Assignee: North American Philips Corporation
    Inventor: Stefan F. Szuba
  • Patent number: 5117217
    Abstract: An alarm system senses the presence of a person sufficiently near a protected object, such as an automobile, to inflict damage thereto, and provides verbal warnings to the person that he or she must step back from the object or an alarm will be sounded. The alarm system includes a proximity detector that senses the proximity of a person to the protected object and means for generating vocal signals using synthetic speech generation circuits. Such vocal signals instruct the person to back away from the protected object, thereby preventing the person from inflicting any damage to the object. The user may select various operating modes and performance options in how the system is used.
    Type: Grant
    Filed: November 7, 1990
    Date of Patent: May 26, 1992
    Assignee: Electronic Security Products of California
    Inventor: Michael Nykerk
  • Patent number: 5103207
    Abstract: A sensor post has a hollow interior and a semi-rigid surface which flexes in response to an applied force. Sensor bars are mounted to the semi-rigid surface in a cantilevered fashion, and include an intermediate electrically insulated section located inside the interior of the sensor post. The sensor element mounting means is rigidly mounted to a portion of the sensor post which remains essentially stationary during an intrusive event. Sensing elements are made of a flexible semi-conductive sensing material, whose resistance increases when the material is stretched, and are mounted so as to straddle an electrically insulated section of the sensor bars. A signal analysis means detects an increase in the resistance of the sensing elements and generates an alarm.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: April 7, 1992
    Assignee: Hitek-Protek Systems Incorporated
    Inventors: Reginald J. Kerr, Malcolm Saubolle
  • Patent number: 5093650
    Abstract: A portable alarm device for monitoring areas against burglary includes an alarm and a power supply connected to the alarm by an alarm circuit. A reception sensor is connected to a variable preamplifier for varying volumes of the alarm signal in accordance with the size of the area being monitored. The preamplifier is connected to at least one rejector circuit frequency filter for controlling the susceptible frequency range of the alarm trigger signals with a microprocessor connected to the rejector frequency filter to receive and transmit the signal. A signal converter is used to activate the power supply. A push button time switch is connected to the signal converter in order to delay time or readiness of the alarm for operation and the power supply is connected to the alarm through the signal converter by a closed circuit for delivering a constant low-intensity current with intermittent interruption by the signal converter.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: March 3, 1992
    Inventor: Klaus-Peter Kolbatz
  • Patent number: 5059796
    Abstract: An infrared monitoring system includes a histogram calculation circuit which detects an alarm area having a plurality of pixels more than a threshold number of pixels and having a temperature higher than a threshold temperature and which generates a first alarm signal when detecting the alarm area. The infrared monitoring system also includes a shape recognition circuit which determines whether or not a shape of the temperature change area corresponds to a predetermined shape and which generates a second alarm signal when determining that the shape of the temperature change area corresponds to the predetermined shape. An alarm device included in the infrared monitoring system generates an alarm such as a siren when both the first and second alarm signals are generated.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: October 22, 1991
    Assignee: Fujitsu Limited
    Inventor: Tetsuya Nakamura
  • Patent number: 5014039
    Abstract: A self-contained and portable door answering and intruder alert apparatus having a magnetic tape recording device comprised of a highly sensitive microphone receiving circuit for capturing noise generated by a person located at the door of a structure and including a tape cassette operated in a timed sequential manner by an appropriate electronic circuit for transmitting to the person one of a plurality of messages prerecorded on the cassette prior to the unauthorized entry of the structure by the person, the timed sequence being synchronized and the apparatus being switched in order to permit each message to play in its entirety for preventing loss of continuity of each message.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: May 7, 1991
    Inventor: Jerry L. Zelenka
  • Patent number: 4994722
    Abstract: A system for automatically locking a lavatory door on an aircraft from a remote location comprises means for activating the system, means for sensing the presence of a person in the lavatory, means for locking the lavatory when it is unoccupied and means for selectively overriding the system to allow entry by authorized personnel.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: February 19, 1991
    Assignee: The Boeing Company
    Inventors: David C. Dolan, Jimmie L. Grimes, David C. Broman, Kwan-Ho Bae
  • Patent number: 4987402
    Abstract: An alarm system detects an unauthorized approach towards a protected object, such as an automobile, and provides verbal warnings to the person approaching the object, that he or she must move away from the object or an alarm will be triggered. The alarm system includes a proximity detector to detect an intrusion into an adjustable electromagnetic field set up around the object and means for generating vocal signals using synthetic speech generation circuits. Such vocal signals instruct the intruder to back away from the protected object before the alarm is triggered, thereby preventing the intruder from inflicting any damage to the object; and draw attention to the fact that an unauthorized penetration or entry event has occurred in the event the alarm is triggered. The user may select various operating modes and performance options in how the system is used.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: January 22, 1991
    Assignee: Electronic Security Products of California
    Inventor: Michael Nykerk
  • Patent number: 4954811
    Abstract: A penetration sensor is disclosed which contains first and second transducers sandwiched around a layer which capacitively isolates the individual transducers. This sensing arrangement allows for the operational state of the sensor to be tested by applying an interrogation signal to each of the transducers.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: September 4, 1990
    Assignee: Pennwalt Corporation
    Inventors: Joseph V. Chatigny, Peter R. Smith
  • Patent number: 4912455
    Abstract: A detector for an alarm system receives a disturbance signal and transmits an alarm signal to a remote station. A group of such detectors can be connected in circuit to operate a common alarm. The detector has means (6, 26, 33) for suppressing a first disturbance signal so that only a second and subsequent ones trigger the alarm. There are also means (8, 30) whereby a disturbance signal only of a given length can pass to trigger the alarm. With another facility (38, 43) the detector registers whether it is the first or a subsequent one in a group to be disturbed. The detector is largely embodied on a integrated circuit chip and all these facilities are selectable by making or omitting simple pin connections.
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: March 27, 1990
    Assignee: Weyrad (Electronics) Limited
    Inventor: Peter L. G. Pharaoh
  • Patent number: 4902887
    Abstract: An optical motion detector detects changes in scene lighting indicative of otion and is also capable of detecting surveillance by active night vision devices using near-infrared light. The detector includes two photodetectors which each provide data to a signal processing network. One photodetector is sensitive to visible light; the other is sensitive to near-infrared light. Both signal processing networks are identical and include a sample-and-hold, a comparator network, and a pulse stretcher. The output of a photodetector is provided to the sample-and-hold and comparator network. The comparator network compares a voltage corresopnding to the instantaneously detected ambient lighting scene with a voltage corresponding to a reference lighting scene. The pulse stretcher receives the output of the comparator network and in turn provides an output to a logical processor.
    Type: Grant
    Filed: May 13, 1989
    Date of Patent: February 20, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Hobart R. Everett, Jr.
  • Patent number: 4897630
    Abstract: An alarm system for detecting, signaling and reporting the occurrence of a penetration towards or an unauthorized entry into a defined area, such as towards or into a closed automobile. The alarm system includes a proximity detector to detect an intrusion into a prescribed zone or region around the defined area, and one or more sensors to sense an unauthorized entry event or attempted entry event into the defined area. The alarm system further includes means for generating vocal speech warning or alarm signals for the purpose of: (1) drawing attention to the fact that an unauthorized penetration or entry event has been sensed, and (2) providing vocal reports to indicate the status of the system and to alert the owner of the system that a prior unauthorized event was detected. During use of the system, the user of the system can select various operating modes and report options, thereby providing flexibility in how the system is used.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: January 30, 1990
    Assignee: Electronic Security Products of California, Inc.
    Inventor: Michael Nykerk
  • Patent number: 4890093
    Abstract: Disclosed is a self-contained Solar Powered Proximity Security Device which operates both local devices, such as lamps, and remote devices through its internal encoder/transmitter. In its automatic mode the device may be operated and triggered by its own internal motion detector or from other local external devices connected to it, or by any combination of internal or external detection devices or switches. Response may be further conditioned by detected ambient or other conditions. For example, the light may not turn on during daylight hours or under conditions of low battery charge to conserve power for priority functions.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: December 26, 1989
    Assignee: Schlage Lock Company
    Inventors: James R. Allison, Garry J. Bolin
  • Patent number: 4888581
    Abstract: An alarm system uses an area sensor having a piezoelectric film sensitive to changes in pressure. A piezoelectric film with electrodes deposited on opposite surfaces of the film converts changes in mechanical pressure to electrical signals. A signal processor detects the electrical signals and generates an output signal in response. The electrodes could comprise single metalized sheets deposited on each surface. Alternatively, an array or pattern of individually operative electrodes could be provided. An array or pattern of electrodes enables the signal processor to determine the location, motion, and direction of motion of a force generating pressure changes on the piezoelectric film. The alarm system may include a threshold detector sensitive to the magnitude of pressure changes so that an output signal will not be generated unless the pressure change is sufficiently great. This invention is suitable as a floor covering for detecting an intruder walking over its surface.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: December 19, 1989
    Assignee: Aritech Corporation
    Inventor: John K. Guscott
  • Patent number: 4882567
    Abstract: A dual sensing intrusion detection system includes a passive infrared radiation detection sensor that generates a first output signal in response to the detection of an intruder in the volume of space. A second detection sensor is directed to the same volume of space and generates a second output signal in response to detection of the intruder. A switch activates the second detection sensor in response to the detection of the intruder by the infrared radiation detector. Logic circuit receives the first and second output signals and produces an alarm signal in response thereto to indicate the detection of the presence of the intruder in the volume of space.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: November 21, 1989
    Assignee: C & K Systems, Inc.
    Inventor: Richard A. Johnson
  • Patent number: 4864156
    Abstract: A proximity switch with a noncontact effect which includes a plug-in adapter having a plug-in socket for the sensor part equipped with a plug-in cable, a ac/dc converter with a core coil connected in front thereof being arranged in the adapter. The adapter is associated with a dc/ac converter located in the basic housing of the main part and includes a core coil connected thereafter. The core coil lie in each case behind the mounting sides of the basic housing and plug-in adapter and transmit by inductive coupling the energy from the main part to the connected sensor part and the signals from the sensor part to the main part.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: September 5, 1989
    Assignee: Werner Turck GmbH & Co. KG.
    Inventors: Burkhard Tigges, Dierk Brasse
  • Patent number: RE34788
    Abstract: Apparatus utilizing change in pressure condition in an area to be protected to indicate intrusion or change in conditions of the area by using a pressure detection device to detect pressure waves at low and infrasonic frequencies which includes a pressure transducer sensitive to change in pressure to provide an output signal. In some instances an amplifier is provided to amplify the output signal, a signal conditioning circuit is provided to delay a portion of the signal, and a detector device is provided to detect the signal with a comparator provided to compare the signal with the delayed signal and actuate an alarm..Iadd.Additionally, a device producing signals responsive to pressure waves and selected sonic frequencies is taught. If the signals are coincidently received at a coincidence detector, an alarm is activated. Further, the signals can be stretched and/or delayed before receipt at the coincidence detector. .Iaddend.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: November 15, 1994
    Assignee: Blue Grass Electronics, Inc.
    Inventors: Elden E. DuRand, III, William K. Logsdon