Matches 651 - 700 out of 1094 < 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 >
Match Document Document Title
5444431 Intrusion monitoring device  
A voltage level detector circuit comprises an amplifier for amplifying the electrical output signal from a detection device, a pair of comparators for comparing the amplified electrical output...
5440498 Method for evaluating security of protected facilities  
A method for analyzing and optimizing security systems is disclosed. A diagram is prepared which organizes and interrelates elements of the security system. The elements of the security system are...
5440291 Intruder detection system for passageways and the like  
The invention is a system for detecting the presence of an intruder in a passageway. In detail, the system includes at least one capacitance probe for mounting on the wall of the passageway, the...
5438316 Fence alarm system with swiveling posts  
A wire fence alarm system 10 comprises a plurality of zones in which a wire or set of wires is stretched between two anchor posts. A sensing post includes sensors for detecting deflection of one of...
5432498 Sensing cable  
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.
5428345 Method of and apparatus for operating a security system to produce an alarm signal  
A security system (10), operable to produce an ALARM signal indicative of glass breakage in a region (16) in which a human being (24) may legitimately be present, has a human presence detector...
5424712 Carjacking defense system  
A motor vehicle carjacking defense apparatus comprises a double pole switch which actuates at least one solenoid controlling at least one valve which interconnects a nozzle to a pump connected to a...
5424711 Ultrasonic monitoring system for the interior of a motor vehicle  
An ultrasonic monitoring system for the interior of a motor vehicle having two mutually spatially separately secured emission elements (S1, S2), the main lobes of the directional characteristics of...
5416467 Security system utilizing loosely contained optical fiber  
A security system, including a cable having a groove formed in the inside thereof to accommodate therein an optical fiber with an excessive length, a plurality of supports having mandrels to...
5414409 Alarm system for detecting an audio signal when glass breakage occurs  
A processor, such as a microprocessor, responds to the detection of an input audio signal generated by glass breakage to cause an alarm to be indicated, such as at a remotely located alarm control...
5408219 Fence gate connector for a perimeter security system  
A perimeter security system that includes a perimeter enclosure having a moving portal closure, a plurality of electronic sensors on the enclosure and a security system with conductors for...
5408089 Object detection system with a plurality of detectors for moveable storage unit systems and work areas having exits  
A storage system with movable units is equipped with emitters for providing a series of radiant energy beams directed along an array of parallel paths through passages beneath the movable units. A...
5406263 Anti-theft method for detecting the unauthorized opening of containers and baggage  
A simple trip-wire or magnetic circuit associated with a shipping container monitors continuity, which is detected electrically. Simply, if continuity is disabled by a forced entry of the...
5406258 Pressurized security barrier and alarm system  
A security barrier for placement across a passageway is made up of interconnected pressurized tubing made up in a grid pattern with openings too small to allow passage. The tubing is connected to a...
5394139 Smoke screen intruder deterrent system  
An intruder deterrent system of the type which generates a smoke screen and which includes an intruder detector, a smoke screen generator operatively linked to the intruder detector means and the...
5394035 Rate of change comparator  
A rate of change comparator uses an RC charging circuit and a separate RC discharging circuit to follow a transducer output. The resistor component of each RC circuit is shunted by a diode, each...
5379029 Sensing decorative tree  
A sensing decorative tree includes a pot provided with a raised annular member on the bottom and a plurality of protuberances on the inner side, a trunk having a lower end engaged with the raised...
5376922 Wireless bistatic link intrusion detection system  
An intrusion detection system employing multiple bistatic microwave links and wireless means for remotely interrogating each link to provide alarm and status information at a central station. The...
5371488 Tension sensing security apparatus and method for fencing  
The security device receives longitudinal tension from a taut wire of a fence and preferably is placed in-line in the taut wire system away from posts used to support the fence. The security device...
5369623 Acoustic pool monitor with sequentially actuated multiple transducers  
For use in detecting the presence of a foreign body in liquid, such as a swimming pool or the like, at least one transducer support is immersed in the swimming pool or other body of liquid to be...
5349502 Universal lattice for magnetic electronic article surveillance system  
A universal lattice assembly for use in a magnetic-type electronic article surveillance system is disclosed which comprises a frame formed of two identical molded plastic half-shells, a metal...
5334969 Vehicle security system with controller proximity sensor  
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...
5331312 Obstacle-detecting apparatus  
This device can detect an obstacle in a railroad crossing or similar setting by way of image processing independently of a height and a width of an obstacle. The image data read from a video,...
5325084 Secure area ingress/egress control system  
The system includes a vestibule and a plurality of emergency exits interconnecting the secure area with the outside environment. The vestibule comprises a pair of security doors and the emergency...
5323141 Glass break sensor having reduced false alarm probability for use with intrusion alarms  
A sensor has a reduced probability of generating a false alarm in the presence of a strong high frequency acoustic wave, such a false alarm being caused by the saturation of the microphone which is...
5319698 Security system  
A security system for detecting and signalling the presence of abnormal security or hazardous conditions, such as unauthorized entry, glass breakage, fire, smoke, high water level, in individual...
5317303 Batteryless sensor used in security applications  
A batteryless sensor includes a small and concealed permanent magnet motor which operates as a generator to convert rotational or translational energy to an ersatz Vcc transient power supply via a...
5311450 System and method of detecting authorized dismantlement of transaction machines  
A firm banking terminal having a data inputting unit, a dismantlement monitor for outputting a detection signal when the terminal body is dismantled, a processor for stopping operation of the...
5311166 Security vestibule  
A security system for a vestibule and, more specifically, a security vestibule is equipped with monitoring devices to monitor the presence of an intruder. The monitoring devices transmit signals to...
5309145 Travel convenience and security device  
A clock, a lamp, an alarm, a motion detector and a smoke alarm are advantageously combined in a travel device which provides the user with both convenience and security when travelling. The motion...
5281961 Motion detection sensor with computer interface  
A ceiling sensor designed to interface with the computerized controllers of energy management systems is disclosed. This ceiling sensor is operable to detect motion through the use of a transmitted...
5280266 Visitor sensing device  
A visitor sensing device capable of being combined with a conventional door intercom is provided. The device includes a detecting circuit to be installed adjacent a door of a house, for sensing the...
5274354 Security device  
A security device includes a portable transmission unit that gives an instruction to start or stop security, a sensor that detects an abnormality of a tuner which receives a signal from the...
5268670 Alert condition system usable for personnel monitoring  
To generate an alert signal indicating that an unauthorized subject is in a first region within seven feet of a passageway, a radio transmitter is worn by the subject and received by a receiver at...
5248958 Hertzian-wave intrusion detetor  
The detector indicates the presence of a body (28) which is sufficiently conductive of Hertzian energy in a predetermined volume with the possibility of determining approximately its distance from...
5245315 Fiber optic escalator handrail intrusion detector shield  
An optical fiber (28) disposed at the entry edge (32) of an escalator handrail guard (22) receives light from an LED (38), the magnitude of which is sensed by a detector (40), the output of which...
5225806 Security system having mode control of sensor points  
A security system in which sensors are included in one or more groups which are stored in the system. Groups of sensors are selectably actuable by a user entering mode information into the system...
5202666 Method and apparatus for enhancing hygiene  
An apparatus for enhancing hygiene comprises a sensor for generating a first signal upon automatically sensing that an individual has entered a washroom and for generating a second signal upon...
5201906 Anti-piggybacking: sensor system for security door to detect two individuals in one compartment  
A control system for a revolving door includes an ultrasonic sensor having multiple sensor heads. The door has a housing and multiple movable compartments formed by door wings. The sensors emit...
5194847 Apparatus and method for fiber optic intrusion sensing  
Apparatus for sensing intrusion into a predefined perimeter comprises means for producing a coherent pulsed light, which is injected into an optical sensing fiber having a first predetermined...
5192931 Dual channel glass break detector  
A glass break detector for detecting the breaking of a window or the like includes an acoustic transducer having a wide band frequency response, coupled to a dual channel filter and signal...
5189396 Electronic seal  
An electronic seal for a casing records the time of changes in the seal state. A sealing strip is fixed in the casing and is formed as a safety loop. A monitoring device is located in the casing...
5182541 Remote controlled theft deterrent system  
A theft deterrent device (10) is provided for enclosures such as dwellings, motor vehicles and the like, having one or more entranceways. The device is adapted to be quickly and easily installed...
5164702 Test apparatus and method for security system  
A security system provides for bidirectional communication between a controller and a plurality of addressable transponders. At least one transponder includes a sensor circuit for detecting motion,...
5160915 Wireless bistatic link intrusion detection system  
An intrusion detection system employing multiple bistatic microwave links and wireless means for remotely interrogating each link to provide alarm and status information at a central station.
5155474 Photographic security system  
An intrusion detection apparatus for detecting the presence of an intruder in a forbidden space comprises a sensor, an illumination system, a sound system and a still camera. When the sensor...
5153560 Apparatus for detecting presence of person inside room having door  
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...
5144285 Pulsed ultra sonic swimming pool alarm apparatus  
Pulsed ultrasonic apparatus for monitoring a swimming pool includes a transmitter housing securable to a child and provides a swept frequency pulsed output from a transducer within the housing when...
5136213 Motion detecting light controller system  
A motion detecting light controller system which includes a light bulb socket adapter having a control circuit for the light which is controlled. The control circuit utilizes a first LED and a...
5134386 Intruder detection system and method  
A microbend-sensitive optical fiber is embedded in a thin pliable padding and laid under an area to be protected. An amplitude-modulated optical light beam is launched into one end of the fiber....
Matches 651 - 700 out of 1094 < 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 >