Abstract: An electronic article surveillance system includes generating circuitry for generating an interrogation signal. The generating circuitry includes an interrogation coil for radiating the interrogation signal in an interrogation zone. A marker is secured to an article appointed for passage through the interrogation zone, and includes an active element for generating a marker signal including harmonic signal components at harmonics of an operating frequency of the generating circuitry. Detecting circuitry detects the harmonic signal components of the marker signal generated by the active element. The generating circuitry generates the interrogation signal in the form of discrete pulses and the detecting circuitry is operated concurrently with the generating circuitry.

Abstract: A temperature sensing system for over-heat detection includes a temperature sensing cable, interface unit and termination unit. The interface unit is configured to issue interrogation, communication and power signals to the termination unit through the temperature sensing cable. During normal operation issuance of the interrogation signal results in no reflection pulses, as the signal is dissipated through the termination resistance in the termination unit. When an over-heat, short circuit or open circuit condition exists, a reflected pulse is detected by the interface unit and this information is used to determine the type and location of the condition. The interface unit is also configured to supply power to the termination unit which in turn is stored in the termination unit to power its operations, including setting of the resistor values. The termination unit is used as an instrument of calibration in the subject system.

Abstract: A pressure detection apparatus including a pressure detection diaphragm, pressure detection circuit for outputting a pressure detection signal proportional to a pressure applied to the pressure detection diaphragm and clamping circuit for clamping the pressure detection signal to a predefined maximum or minimum value when the detected pressure signal is larger than the maximum value or less than the minimum value. Signal clamping by the clamping circuit is cut-off or cancelled when the pressure applied to the pressure detection diaphragm causes an operational error. This operational error may be detected by forming part of the clamping circuit on a semiconductor diaphragm of the sensor. Also, a failure detection circuit may be used to detect sensor failure and then cancel signal clamping.

Abstract: An apparatus for detecting ice forming conditions includes a substrate having a first surface and a second surface; a sensor disposed on the first surface, the sensor being made of a material having a characteristic which varies in a known manner with respect to temperature; and a unit for monitoring the characteristic and for detecting ice forming conditions from the characteristic. A method for positioning the apparatus to detect ice forming conditions, to detect the presence of ice, and to determine an ice accretion rate is also provided.

Abstract: An electronic article surveillance system includes a main apparatus; one or more relays connected to the main apparatus through cables; and one or more tags which are connected to the relays through cables. Each relay includes a resistance variation detecting section for successively detecting the resistance variation of one or more tags and for producing detection data; a data comparing section for comparing data prestored in memory with the detection data; a warning generating section for generating a warning when there is no coincidence in the comparison; and a tag surveillance operation stop section for stopping the warning generating operation for the subject relay or for a specific tag from among one or more the tags in response to an external control signal. An electronic article surveillance system is provided which is capable of selectively stopping the generation of the warning associated with the tag to be removed in situ when the tag is removed from the merchandise article for a proper reason.

Abstract: A retrofittable remote controlled deadbolt operating system is provided for locking and unlocking a deadbolt lock. The system has a transmitter that activates a receiver located on the actuator of the lock to engage a motor which is connected to gears that are in turn connected to an adaptor that mates with the actuator. The adaptor transfers the force of the motor in the necessary direction for operating the lock. The system also has a panic alarm siren that can be activated by the remote control. The remote controller can also be used to operate an existing garage door opener, and to turn on lights.

Abstract: A magnetostrictive element for use in a magnetomechanical article surveillance marker formed by first annealing an amorphous metal alloy, such alloy comprising iron and cobalt with the proportion of cobalt being in the range of about 5 to about 45 atomic percent, in the presence of a saturating magnetic field and then second annealing the alloy in the absence of the saturating magnetic field.

Abstract: A gate opening alarm for swimming pool fences and the like will sound an audible alarm when the gate is opened without first pressing a reset/pass switch button that is mounted out of children's reach. An alarm housing and a magnetically actuatable switch are mounted on either the gate or frame, with a permanent magnet mounted closely adjacent to the switch on the other gate component so that they will be separated when the gate is opened. A reset switch button is provided so that an adult may disable the alarm for a short period to pass though the gate. If the gate is not then closed, the alarm will sound. Opening the gate without pressing the reset button will cause the alarm to immediately sound. The switch is rearmed when the gate is closed after opening or after a short period if the reset button is pushed but the gate is not opened. If the gate is left opened, the alarm will sound for a period of typically 3 minutes, then will stop to check whether the gate has been closed.

Abstract: An alarm device for an automatic garage door includes a detecting circuit for producing a single negative pulse signal when a detector detects an opening motion of said garage door, an alarm controlling circuit for receiving said single negative pulse signal and producing an alarm signal, a "normal function" detecting circuit connecting to a garage door opening machine for producing a "normal opening" signal when said garage door is normally opened by said garage door opening machine, which is then changed to a "shut off alarm" signal provided to said alarm controlling circuit for preventing the production of said alarm signal, an alarm generating circuit for generating an alarm when said alarm signal is received, and a transformer circuit for providing low voltage for said alarm device. Accordingly, the alarm device for an automatic garage door can provide a warning alarm when said garage door is forced to open or damaged by bandits or burglars.

Abstract: A rechargeable battery set includes a power supply encased in a housing, a rescue alarm electrically connected to and powered by the battery via a switch so that when the switch is turned on, sounds of high decibels are generated and emitted by a speaker or buzzer incorporated inside the housing and a pair of retractable electrodes arranged within the housing to be electrically connected to the power supply via a high voltage generation circuit under the control of the switch and manually extendible out of the housing to provide an electric shock for user's body protection purpose. A flash generator is also mounted within the housing and connected to the power supply to generate a flash signal for rescue purpose.

Abstract: An alarm system for preventing loss of personal property, comprises a pair of radio signal transmission/alarm units that each include a sending component having a signal oscillator, and a receiving/alarm component comprising a tuner for selecting a signal from the sending component and receiving the signal as an electrical current, an amplifier for amplifying the signal current, an alarm, and a switcher that switches off the alarm when the amplified signal current is above a prescribed level and switches on the alarm when the amplified signal current does not exceed a prescribed level. The signal transmitted by one sending component is tuned to the receiving/alarm component tuner frequency of the other transmission/alarm unit, and each receiving/alarm component is tuned to the signal frequency of the sending component in the other transmission/alarm unit.

Abstract: A printed circuit board includes first and second layers and an electronic article surveillance tag positioned between the first and second layers. Bonding material is positioned between the first and second layers to bond the first layer, second layer and electronic article surveillance tag together. The printed circuit board can be detected by an electronic article surveillance system.

Abstract: An electronic alarm system of the kind used in commodity surveillance systems includes an alarm element which is adapted to receive a magnetic alternating field transmitted from a transmitter by means of a transmitter coil and also adapted to re-transmit a magnetic alternating field, wherein a receiver which includes a receiver coil is adapted to receive and detect the re-transmitted alternating field. The transmitter coil and the receiver coil are one and the same coil (1). Between the transmitter (TX) and the receiver (RX) on the one side and the transmitter-receiver coil (1) on the other side, there is provided an electronic unit (14) which includes a transformer (5) and a resistance (2) which are so adapted that when transmitting, a first part of the transmitter power will be applied to the transmitter coil (1) and the remaining part, a second part, will be applied to the resistance (2).

Abstract: A theft deterrent system disables one or more components of electronic equipment in response to the unauthorized removal of the electronic equipment. An AC control module is disposed between an AC source and a theft deterrent circuit. The theft deterrent circuit has a first sensor to detect the presence of AC power at the theft deterrent circuit, an alarm circuit having a second sensor to detect unauthorized removal of the electronic equipment, a DC source for supplying power to the alarm circuit and for arming the alarm circuit once the first sensor has detected the absence of AC power to the theft deterrent circuit and a disabling circuit having a high voltage output connected to one or more of the components of the electronic equipment, in order to permanently disable the components when the second sensor detects unauthorized removal of the electronic equipment.

Abstract: A semi-hard magnetic element is formed by at least partially crystallizing an amorphous soft iron-metalloid material. The heating process used to achieve crystallization includes a controlled oxidation stage to increase the level of remanent flux that is provided when the processed magnetic element is placed in a fully magnetized state.

Abstract: A multifunction passive infrared occupancy sensor functions as an occupancy sensor for security systems and also as an occupancy sensor for energy management control systems. The occupancy sensor comprises at least one segmented infrared lens array wherein the segments of the infrared lens array establish different optical lobes in the field of view of the occupancy sensor. At least one pyroelectric infrared detector is positioned at or near the focal point of the segmented infrared lens array, for detecting movement of infrared sources within the field of view of the occupancy sensor and producing an output signal representative thereof. A processing means analyzes the output signal of the detector for security detection purposes by detecting changes in the output signal greater than a given security threshold.

Abstract: A universal alarm system includes a first main component and a second main component. The first main component contains an internally-disposed continuous loop alarm circuit and is attachable to a first object that is to be protected against an unauthorized removal thereof. The second main component replaceably engages the first main component, by non-magnetic means, and contains an internally-disposed circuit and is attachable to a second object. The internally-disposed continuous loop alarm circuit of the first main component is in electrical communication with the internally-disposed circuit of the second main component when the first main component is engaged with the second main component, so that when the first main component and the second main component are separated from each other the internally-disposed continuous loop alarm circuit of the first main component activates an alarm and since the first main component remains with the first object, location of the first object is facilitated.

Abstract: An impact sensing system senses an impact or acceleration applied and provides an external alarm indicative of the impact or acceleration applied. An envelope detector detects an envelope of an output signal of said sensor unit. An amplifier amplifies the output signal of said envelope detector, a direct current component being eliminated therefrom. A first low pass filter filters a first level signal from the output signal of said amplifier, the first level signal being indicative of a first level of impact or acceleration. A second low pass filter filters a second level signal from the output signal of said amplifier, the second level signal being indicative of a second level of impact or acceleration. A first timing pulse generator generates a first timing pulse with a first time duration in response to the output signal of said first low pass filter, the first time duration being indicative of said first level signal.

Abstract: In an apparatus and method for deterring and preventing forced entry intrusion into residential and commercial premises, the apparatus is a combination vertically operated dead bolt door lock surrounded by an alarm housing having battery means, a loud speaker, and a contact switch. The lock striker plate is mounted to the door frame as usual, but the lock is not mounted to the door at all, but rather is attached in suspension within the alarm housing. The alarm housing is attached to the door, and the lock within the housing is offset so as to float in spaced-apart relationship from the door on which the alarm housing is installed. Upon an intrusion effort, the door, together with the alarm housing will be shoved inward toward the premises by the intruder. But the lock floating within the alarm housing will be restrained by its engagement with the striker plate mounted to the door frame.

Abstract: An autohandler for supplying a lot of feed trays carrying samples and for removing a lot of return trays loaded with tested samples. A loading mechanism has a feed tray elevator containing samples to be tested. An unloading mechanism has a return tray elevator for receiving return trays containing tested samples. An empty tray storage unit stores empty trays. A tray transfer hand transfers the trays. A sensor detects the feed tray elevator position. The sensor actuates an alarm when the feed tray elevator is almost empty.