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5021766 |
Intrusion detection system
A pressure sensitive perimeter intrusion detector comprises at least two pressure sensitive housing members adapted for the transmission of acoustic waves in response to pressure applied to the...
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5019801 |
Article surveillance system having target removal sensor
An article surveillance marker includes a marker body having two sections connected together by a resilient hinge. A securing pin holds the body sections together in a closed position and secures...
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5019802 |
Intrusion detection apparatus
Intrusion detection apparatus for detecting the intrusion within a predetermined area utilizes two detectors, a microwave detector and an infrared detector for providing an ouptut signal indicative...
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5017906 |
Apparatus and method for combining analog detection signals to provide enhanced alarm integrity
An apparatus and method for combining detection signals generated by intrusion detection systems to provide improved alarm integrity therefor. The apparatus and method have utility with mixed...
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4977390 |
Real time method for processing alaarms generated within a predetermined system
A methodology for processing alarms generated within a predetermined system embodies a forward chaining approach to the analysis of alarms. Before an alarm set can be diagnosed, the method includes...
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4977391 |
Safety device for a distributor member connected to a distributed product totalizing element
The measuring element and the totalizing element are each respectively connected to one of two operation sensors, supplying respectively an information on one input of a two input AND management...
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4975686 |
Process and apparatus for detecting pulses due to electrostatic discharges from furniture or human beings
The detection of brief pulses generating high frequencies is carried out by a system including: sensor for detecting an electrostatic field and for detecting an electromagnetic field, such that the...
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4975684 |
Fire detecting system
A fire detector having a first sensor for emitting a first output signal in response to a fire phenomenon, a second sensor for detecting a source of false alarm conditions generated by man and/or...
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4975680 |
Local-field type article removal alarm
A currency alarm pack especially adapted for use in the cash supply of an automatic teller machine comprises a motion detector, an exit field detector, a smoke generating device, and electronic...
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4965551 |
Burglar alarm system for multi-unit mailboxes
Alarm system for multi-compartment, postal mailbox arrays incorporating a plurality of individual mail compartments contained behind a primary access door. The system comprises an alarm secured...
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4951032 |
Crib rail safety annunciator
A crib rail safety monitor alerts a child's attendant to the potential injurious situation when a child is located within a crib and the crib side rail is in the down or lowered position....
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4942384 |
Composite type crime preventive sensor
A composite type crime preventive sensor processes output detection signals from a plurality of sensor units of mutually different detection systems for ranking the signals into a plurality of...
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4933667 |
Graphic annunciator
A versatile, economical, and structurally simple annunciator for use with a fire detection system or the like is provided which requires only a single connection with the detection system, which...
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4931646 |
Remote multichannel coincident nuclear detector and characterization system
A multichannel coincidence nuclear detector system for spectral charactertion of nuclear radiation sources at a remote location. The system is designed to detect and classify the radiation source...
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4910501 |
Creosote fire alarm system
An alarm system for warning of a creosote chimney fire hazard, having both means to produce a visible alarm when the creosote temperature is nearing the creosote flash point, and means to produce...
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4891574 |
Hygrometer with plural measuring bones and redundancy system circuit
A hygrometer of the electrical impedance type includes a sensing element (1) having a porous moisture adsorbing layer (3), the electrical properties of which vary with the quantity of water vapour...
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4884067 |
Motion and position sensing alarm
A personal security communication system is disclosed. It is comprised of a motion and position sensor adapted to detect motion and lack of motion. The sensor has a motion and position sensing...
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4882567 |
Intrusion detection system and a method therefor
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...
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4881061 |
Article removal control system
A system for controlling removal of articles from a facility by authorized users transmits data to, and receives data from, an article inventory control system and an electronic article...
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4876532 |
Vending rack burglar alarm
A vending machine is disclosed which is protected from theft or pilferage through an alarm device contained within the vending machine. The alarm device is mounted within the vending machine and...
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4862142 |
Circuit with memory for detecting intermittent changes in resistance, current, voltage, continuity, power interruption, light, and temperature
Electrical circuits for detecting intermittent and continuous electrical parameters such as continuity for open or closed circuits, AC power interruption or decrease in frequency, DC power...
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4857912 |
Intelligent security assessment system
An intelligent security assessment system includes a multiplicity of sens for detecting intrusion into an area. Each of the sensors operates on a different principle to detect intrusion. For...
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4849731 |
Scanning obstacle detection apparatus
An apparatus for detecting obstacles in the path of a work vehicle, in which a transducer produces radiant energy, receives radiant energy reflected from an obstacle and produces an obstacle...
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4850018 |
Security system with enhanced protection against compromising
A security system for a protected premise has a controller which receives data, over a pair of line conductors, from the addressed transponder of a series of addressable transponders located within...
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4835520 |
Talking alarm for openable compartment
A message-generating apparatus for discouraging access to a compartment during predesignated time intervals. The apparatus includes a detector to determine when the compartment door is open and to...
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4833450 |
Fault detection in combination intrusion detection systems
An intrusion detection system employs a microwave subsystem and a passive infra-red subsystem. Both systems must produce an output signal indicative of an intrusion in order for the system to...
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4833449 |
Home security system
A security system for a home having one or more security zones. A main station is associated with the home and, when initialized, constantly monitors the state of remote intruder sensors throughout...
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4831361 |
Environmental abnormality alarm apparatus
An environmental abnormality alarm apparatus includes a sensor for detecting a fire, gas leakage, a burglar, or the like in a monitoring area, and a signal processor for receiving an output from...
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4818973 |
System for detecting a transfer of an article
A system for detecting a transfer of article comprising a card attached to the article and a detector. When the article having the card is transferred to a monitoring area, electromagnetic signals...
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4815840 |
Position locating system for a vehicle
A position locating system for a vehicle such as a mobile robot which includes a multisector sensor for sensing the coded signal emitted by a beacon. There are means responsive to the sensor for...
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4812819 |
Functional relationship-based alarm processing system
A functional relationship-based alarm processing system and method analyzes each alarm as it is activated and determines its relative importance with other currently activated alarms and signals in...
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4810998 |
Interruption demonstrating and multi-phase burglar detecting alarm
The interruption demonstrating and multi-phase burglar alarm system is started by signals from 2 or more than 2 detectors amplified and inputted into an interruption demonstrating circuit. By an...
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4797655 |
Detector system for monitoring a fluid containing tube
Apparatus for monitoring fluid flow in dialysis systems include a tube holder for mounting the tube at a predetermined location on a dialysis monitor, a transmitter for transmitting a signal such...
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4772868 |
Signal warning system for motor vehicle
A signal warning system for use with an automotive vehicle as to the application of the vehicle's deceleration in excess of a predetermined speed sensed by the system, thereby continuously flashing...
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4772875 |
Intrusion detection system
An intrusion detector has a first sensor for monitoring a first condition and a second sensor for monitoring a second condition in a space to be protected against intrusion; a change in the...
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4765244 |
Apparatus for the detection and destruction of incoming objects
Detection apparatus which is sensitive both to radiation and to the proximity of the radiation source, as well as destruction apparatus embodying detection apparatus.
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4757304 |
Vehicle security system
There is provided a vehicle security system which is especially useful for night workers to secure themselves against burglars previously hidden their vehicles, comprising a sensing unit for...
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4746906 |
Dual technology intruder detection system with modular optics
Disclosed herein is a dual technology intruder detection system which features a modular optical system by which the field of protection of one subsystem can be changed relative to the field of...
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4746910 |
Passive infrared intrusion detector employing correlation analysis
For reducing the susceptibility to false alarms and for increasing the detection probability of a passive infrared detector, the actual signals obtained from a first sensor element are continuously...
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4740777 |
Programmable fluid detector
A plurality of probes are electrically connected to a central controller. Each of the probes is capable of providing a hydrocarbon signal, a water signal, and a dry signal to the controller upon...
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4728935 |
Integrity securing monitor and method for a security installation
The security of fire, intrusion and other security systems is improved by the disclosed monitor and method for providing an indication of the possible degradation in the integrity of a...
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4725820 |
Composite detector
A composite detector includes a plurality of sensors of the same or different types, a plurality of analog switches connected to outputs of the plurality of sensors, and an operation circuit, such...
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4718497 |
Fire and explosion detection and suppression
A fire and explosion detection and suppression system protects two physically adjacent zones in each of which there is a UV sensor and an IR sensor. In each zone, simultaneous detection, by the...
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4710751 |
Ground fault monitor circuit
A sensor circuit for detecting a ground fault in devices that eliminate or prevent static electricity and for producing appropriate alarm signals to indicate an undesirable ungrounded condition. In...
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4695822 |
Overheat warning and prevention system for outboard engines
A water pump circulates cooling water to an outboard engine, and overheating does not generally occur unless the circulation is insufficient. A pressure sensor responsive to low pressures so as to...
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4688021 |
Combined smoke and gas detection apparatus
A combined smoke and gas detector utilizes a conventional smoke detector IC (44) which is operable to drive a piezo element (46) and an LED (94) to provide indication of a smoke or gas detection....
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4684929 |
Microwave/seismic security system
Method and apparatus is disclosed for detecting a security threat in a zone. A transmitter within the zone directs a first microwave signal of frequency f 0 to a reflector. The reflector doubles...
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4682155 |
Personnel security system
A security sensing system monitors the passage of persons through a door or like opening. A transmitter module having means for transmitting an omnidirectional signal is installed on persons to be...
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4660024 |
Dual technology intruder detection system
A dual-tech intruder detection system includes a pair of intruder-detecting subsystems, each functioning to detect intrusion by a technology different from the other, and apparatus for activating...
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4656465 |
Method and arrangement for evaluating the performance of a yarn processing machine
An arrangement for evaluating the performance of a yarn processing machine including a plurality of yarn processing stations that are individually operatable and each of which includes a monitoring...
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