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| Number | Title | Issue Date |
| 7675417 | Fence alarm A fence alarm for detecting and identifying a location in a fence which is broken. The fence alarm comprises a power source for providing power to the alarm components, the components including a plurality of detectors, each detector providing termination of a segme... | 03/09/2010 |
| 7532118 | Vibration sensor for boundary fences It is an aim of the preferred embodiment, to provide an improved sensor unit that is at least as reliable as two sensor units of the prior art, thereby allowing one unit per fencing unit, i.e. per stretch of fencing between adjacent support posts to provide long ter... | 05/12/2009 |
| 7339474 | Deflection sensing system The system incorporates wire deflection, taut wire detection for perimeter security applications. Generally, the system of the invention provides intrusion detection by an internal mechanism. The internal mechanism can detect wire deflection in any direction. In tur... | 03/04/2008 |
| 7323985 | Electronic warning system and method The invention provides an electronic warning system, including an electrical line of a fence extending along a protected area; a pulser; a transmitter for transmitting pulses through the line; a receiver for receiving the pulses after being transmitted along at leas... | 01/29/2008 |
| 7191735 | Electric animal deterrent for contact with underlying ground system The present invention provides a high voltage pulse generator used for deterring animals where the high voltage pulses are delivered to the animal through an electrical conductor that lays directly on the ground and is not insulated from the underlying ground system... | 03/20/2007 |
| 7184907 | Apparatus and method to detect an intrusion point along a security fence A monitoring system evaluates the integrity of a fiber optic cable, having a weave pattern and being attached to a security fence. To establish and calibrate the monitoring system, the present invention provides a system and method for establishing a look-up table t... | 02/27/2007 |
| 7154275 | Method and apparatus for detecting individuals using electrical field sensors A robust, easily deployable, covert, passive intrusion detection system uses one or more E-field sensors to detect the presence of a moving individual and to provide an indication of the presence of the individual adjacent the sensor based on E-field distortion prod... | 12/26/2006 |
| 7154391 | Compact security sensor system A sensor array that forms part of an intrusion detection system, which is adapted for use on narrow spaced objects that surround a perimeter. The sensor array includes at least two intrusion detection sensor nodes, a plurality of node processors corresponding to eac... | 12/26/2006 |
| 7126475 | Electronic fence transmitter for self-adjusting the receiving distance An electronic fence transmitter for self-adjusting the receiving distance is comprised of a fence wire buried in a yard, a voltage detector that is connected in series to the fence wire and a comparator for comparing the detected voltage of the voltage detector with... | 10/24/2006 |
| 6980108 | Optical fiber cable based intrusion detection system There is provided an electronic security system for a perimeter structure that incorporates a fiber optic cable secured to the perimeter structure. Typically the perimeter structure is a fence. A light pulse is transmitted down the fiber optic cable. Mechanical atte... | 12/27/2005 |
| 6967584 | Integrated sensor cable for ranging An intrusion detection system provides the function of an “active” ranging sensor cable system utilized for identification of the location of the intruder, with that of a “passive” cable detection system, in an integrated cable configuration. This dual funct... | 11/22/2005 |
| 6950021 | Electronic wall using high-resolution millimeter-wave radar in conjunction with multiple plane reflectors and retroreflectors An apparatus for detection of any intruder passing through an electronic wall is disclosed. The electronic wall is formed by a millimeter-wave radar positioned at one end of the wall and a plurality of combinations of plane reflectors and retroreflectors placed alon... | 09/27/2005 |
| 6948452 | Electric animal deterrent for contact with underlying ground system The present invention provides a high voltage pulse generator used for deterring animals where the high voltage pulses are delivered to the animal through an electrical conductor that lays directly on the ground and is not insulated from the underlying ground system... | 09/27/2005 |
| 6937151 | Method of perimeter barrier monitoring and systems formed for that purpose A perimeter barrier system and method of monitoring a perimeter barrier are disclosed which comprise a perimeter barrier element in the form of a picket or fence panel which is mounted for limited movement by spring loading the barrier element by means of springs. A... | 08/30/2005 |
| 6922059 | Electric field sensor The invention is a detection system and in one embodiment uses inexpensive, miniaturized sensors for detecting electric field (E-field) disturbances. Such sensors are easily and covertly deployable and have low power consumption. The devices may incorporate visual o... | 07/26/2005 |
| 6891472 | Taut wire wireless perimeter fence security system The present invention is a taut wire security system that is used with a perimeter fencing system. The device senses changes in the tension in the taut wire and produces a tension signal when a disturbance in the tension is created. This signal is transmitted to a c... | 05/10/2005 |
| 6847298 | Data transmission A data transmission system which is particularly useful for a remote control apparatus for an electric fence. The apparatus includes a portable hand held housing with a contact 16 which in use can contact a conductor of an electric fence line. The output of t... | 01/25/2005 |
| 6836213 | Method and apparatus for improving the sensitivity of a taut wire intrusion detection system A taut wire intrusion detection system includes posts that are used to detect an intrusion into a secured area. The supporting posts are used to both detect a movement of the taut wire and anchor the taut wire by using separate anchor and sensor elements. The taut w... | 12/28/2004 |
| 6825768 | Adaptive pet containment system and method The present invention provides an automatic correction system and technique for a pet containment system in which the correction levels of the electrical stimulus and/or audio or visual warning are adaptively adjusted in accordance with the behavior of a particular ... | 11/30/2004 |
| 6816073 | Automatic detection and monitoring of perimeter physical movement Apparatus in one example comprises first and second fence posts that cooperate to represent a subportion of a perimeter to be secured. The first fence post comprises a first motion sensor and a first laser sensor. The second fence post comprises a second motion sens... | 11/09/2004 |
| 6806811 | Infra-red perimeter alarm A very reliable alarm system is comprised of transceiver node devices interconnected via infrared links forming a secure perimeter, whereby each transceiver node in the perimeter receives an infrared transmission from a previous transceiver node, and itself transmit... | 10/19/2004 |
| 6650239 | Outdoor intrusion detection alarm An outdoor intrusion detection system that includes a portable housing (1), a plurality of adjustable fasteners (21) and (22), an augmented switch (5), and a sensor line (3) for sensing human and/or animal intrusions into a predetermined perimeter or boun... | 11/18/2003 |
| 6646563 | Deflection sensors A deflection sensor for a taut wire perimeter fence detection system, which can be installed after the fence wire has been installed easily, and the sensor the operates in line with the wire tension. The sensor includes a plate member adapted to be pivota... | 11/11/2003 |
| 6646551 | Method and apparatus for improving the sensitivity of a taut wire intrusion detection system A taut wire intrusion detection system includes posts that are used to detect an intrusion into a secured area. The supporting posts are used to both detect a movement of the taut wire and anchor the taut wire by using separate anchor and sensor elements.... | 11/11/2003 |
| 6611205 | Gate operator safety system An emergency control system for opening or closing a gate resides within a controller for regulating operation of the opening/closing mechanism of the gate. A safety station is in communication with the controller and includes means to signal the emergenc... | 08/26/2003 |
| 6600422 | Apparatus and method for electronic exclusion and confinement of animals relative to a selected area The present invention discloses a method and apparatus for electronically deterring an animal from approaching an exclusion area around an exclusion unit or from entering or leaving an area bounded by a wire. The animal is provided with a collar unit, whi... | 07/29/2003 |
| 6577236 | FM CW cable guided intrusion detection radar A FM CW cable guided radar for the detection and location of outdoor perimeter intruders. Helically wound outer conductors on coaxial transmit and receive transmission lines provide a slow wave structure to support the propagation of external electromagne... | 06/10/2003 |
| 6466157 | Electronic fence using high-resolution millimeter-wave radar in conjunction with multiple passive reflectors An apparatus for the detection of any intruder passing through an electronic fence is disclosed. The electronic fence is formed by a millimeter wave radar positioned at one end of the fence and a plurality of reflectors placed along the floor of the fence... | 10/15/2002 |
| 6456198 | Fence sensor It is an object of this invention to provide a fence sensor which can achieve an excellent detection stability without using a current for generating an electric field nor infrared rays. The fence sensor comprises a detection electrode (8); a reference el... | 09/24/2002 |
| 6144298 | Electronic filament netting An electronic filament netting including a warp of a first plurality of wires woven together with a weft of a second plurality of wires, wherein a random number of the warp and the weft wires are electrically connected to electronic monitoring apparatus s... | 11/07/2000 |
| 6084505 | Method and apparatus for sending signals over an electric fence line A method and apparatus for electronically controlling an electric fence energizer. The method is characterized by the step of sending a user selectable coded signal along an electric fence line to the electric fence energizer, said coded signal causing th... | 07/04/2000 |
| 6020658 | Electric fence energizer An energy-efficient energizer for an electric fence for controlling livestock or the like, includes an output voltage sensor. By switching to extra storage capacitance and/or altering the charge voltage the energizer varies the duration of the output puls... | 02/01/2000 |
| 5790023 | Apparatus and method for control of electric fence An electric fence controller and method of controlling the energization of an electric fence. The controller includes a digital timing circuit which generates a digital signal to control the activation of a switching circuit for applying energy from an ex... | 08/04/1998 |
| 5677674 | Method of making a flexible closure incorporating an alarm system A flexible closure, for use in an alarm system is provided in which a conductive sensing element is interlaced with fiber matrix material to provide a network over at least part of the closure. The interlacing is preferably by means of knitting a conducti... | 10/14/1997 |
| 5596281 | Method and an apparatus for measuring the output voltage on an electric fence and for producing electric pulses in said fence An electric fence energizing apparatus is described in which a chargeable capacitor is connected to the primary winding of a transformer. The secondary winding of the fence is connected to receive pulses at the discharge of the capacitor, the discharge ti... | 01/21/1997 |
| 5550530 | Device for supplying power to and monitoring an electric fence 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 com... | 08/27/1996 |
| 5302945 | Electric appliance fault monitor and indicator A monitor and indicating circuit for an electric appliance detects the absence of the energization voltage for the appliance exceeding a predetermined threshold and provides a brilliant flash from a xenon lamp which is visible from great distances. The ci... | 04/12/1994 |
| 4891627 | Device for detecting object A device for detecting an object includes apparatus for converting a variation of a floating capacity between a sensor consisting of an electrode plate and an object to be detected into a variation of a frequency signal and apparatus for detecting the sta... | 01/02/1990 |
| 4859989 | Security system and signal carrying member thereof A security system comprising a signal-carrying member and a detector for detecting a change in the resistance of the conductive path surrounding a core of the signal-carrying member. The conductive path comprises inner and outer layers of semi-conductive ... | 08/22/1989 |
| 4833806 | Display cell element for point matrix display panels The present invention relates to a display cell element comprising a plate (2) with one reflecting side (3) and one black side (4). The plate (2) revolves between an active position when the reflective (3) side is showing, and a non-functioning position w... | 05/30/1989 |
