Abstract: During monitoring of the driveline of an agricultural implement in respect of overloading and the degree of loading, from a first occurrence of slip, the slip revolutions occurring during a measuring cycle are added up. If the number of slip revolutions exceeds a permissible number of slip revolutions, a signal is generated indicating an overloading condition, a new measuring cycle beginning upon release of the signal to be able to take into account the effects resulting from a change in the behavior of the tractor driver, the nature of the signal being changed responsive to the speed differential between the input speed and output speed of a friction coupling permitting relative rotation.

Abstract: To reduce the occurrence of false alarms, the disclosed system incorporates an auxiliary sensor for detecting the presence of a shopper passing through the electronic article surveillance device, such that the device is operated continuously, and the auxiliary sensor is used to enable external alarms of the device only upon detecting the shopper's presence. Thus, while the device continuously monitors field-induced signals which are received, activation of the external alarm is permitted only when a shopper passes through the security device and is detected by the auxiliary sensor. Sounding of the alarm is then based upon an analysis of the data received at and just prior to the detected approach of the shopper to be monitored, eliminating phantom alarms while significantly reducing false alarms and merchandise-activated alarms.

Abstract: A remote control transmitter includes a function selector device (17) for outputting selection signals in dependence on a function selected by operating the device. A function is selected by tilting the function selector device which includes optically functioning tilt switches. For this purpose, a ball guide housing (50) is constructed with five ball resting places, i.e. places in which a ball (K) within each specified tilt range always adopts a stable position. At one of the ball resting places a light transmitter (D) is mounted, while at other ball resting places light receivers (P1-P3) are located. A multi-bit signal is outputted by the light receivers, with the different bit sequences corresponding to different selection signals.

Abstract: A safety device for locating an individual fallen into the sea includes a visual indicator in the form of a dye and an intermittently operated lamp (3), and a radio transmitter (9) for transmitting a radio signal. The dye is contained in a vessel (4) having a trap door and control circuits (12) are provided having a power source (5) and automatically operated by a water sensitive microswitch (10) to open the trap door of the dye vessel (9), energize the intermittent lamp (3) and energize the radio transmitter (9), all of the components being integral with a helmet (1) worn by the individual. A radio receiver may also be provided on a boat for receiving signals transmitted from the radio device and guiding the boat to the radio device.

Abstract: A novel sensor element having low magnetic coercivity and an asymmetric hysteresis characteristic is formed by heating a strip of cobalt alloy in an exidizing atmosphere to form an oxide coating thereon and then the strip is cooled in the presence of a magnetic field of about 0.3 oersteds along its length. The strip is detected by subjecting it to an alternating magnetic interrogation field and passing the resulting magnetic disturbances through signal processing circuits which select pulses produced only once in each interrogation field cycle. The element is deactivated by subjecting it to a magnetic field which eliminates its asymmetry.

Abstract: A portable light includes a light, a battery, and a switch having an "on" position and an "off" position. The switch in the "off" position prevents the light from being illuminated and the switch in the "on" position directly connects the light to the battery to cause the light to be illuminated. The switch includes a first interdigitating member. A bracket for mounting the portable light includes a second interdigitating member in interconnecting relationship with the first interdigitating member on the switch. The interconnecting relationship between the interdigitating member moves the switch to the "on" position when the light is removed from the bracket.

Abstract: In combination with a golf club holder, sometimes referred to as a golf bag, an alarm system reminds golfers when golf clubs are missing from the golf bag. The alarm system includes a plurality of signaling devices which can be light emitting diodes. The golf bag includes a plurality of stations into which the golf club shafts fit grip first. Each station includes a switch, the switches being electrically connected in parallel to a source of electricity. The switches are biased to such a position that the signaling device is energized when a golf club is withdrawn from the station and de-energized when the golf club is returned. The LED display may be mounted on the golf bag or may be connected to an extension cord to be mounted in the front of a golf cart.

Abstract: A small-sized thin frequency sensor developed for prevention of theft of an article. The frequency sensor comprises a receiving antenna portion to receive high frequency waves, and a transmitting antenna portion which is shaped into a closed loop with a diode incorporated therein and is disposed linearly to the receiving antenna portion to form an oblong rectangular contour as a whole.

Abstract: In an electronic article surveillance system, a low-power supply is used to power the system during ordinary search-and-detect operation, and the increased power needed to transmit high-power signals for deactivating the tag circuit is produced by charging up a rechargable storage device, such as a capacitor or rechargable battery, in the intervals between deactivations and using the charged-up storage device to provide the high supply power needed during deactivation, to generate the deactivation transmission.

Abstract: An electrical article surveillance (EAS) tag is inclusive of an electrical power source contained with the tag and circuitry powered by the electrical power source and a motion sensor operatively associated with the tag and contained therewith, the motion sensor providing output indication of movement and thereupon effecting loading of the electrical power source by such tag circuitry.

Abstract: An automatic temperature monitoring system comprised of a central control circuit and one or more processing circuits connected thereto. Each processing circuit(s) has one or more remote temperature sensing probes connected to remote refrigerating equipment. The processing circuit(s) has switching devices for programming a microprocessor circuit of the processing circuit and for setting high and low limit parameters as well as delay parameters for analyzing current signals generated by each of the remote temperature sensing probes. A display device displays the numerical values of the limit parameters. An access circuit provides access to the stored information signals in the microprocessor and representative of accumulated monitored signals received from the sensing probes on a predetermined periodic basis. An alarm device generates an alarm upon detection of an alarm condition by the microprocessor.

Abstract: An emergency alarm system includes a portable digital pulse transmitter having a failsafe mode of activation by the user thereof. A coded pulse signal is transmitted to a decoding device in a digital receiver. The receiver has a latch relay which is connected in circuit with a power source and an alarm device. The alarm system may have a water sensor for setting off the alarm in the event the user falls in the water and may have remotely activated transmitters for locating the user with a receiver and directional antenna.

Abstract: A microwave transceiver comprising a Gunn diode microwave radiation source, a Schottky-barrier diode mixer, a closed rectangular waveguide cavity, a coaxial-waveguide joint, and a monopole antenna providing a microwave radiation dispersion/collection pattern occupying a spatial region elevated from and extending radially outward and 360.degree. in azimuth with respect to said antenna, said spatial region having a substantially spatulate radial cross-section.

Abstract: The invention provides in combination, an electronic article surveillance system for disposition in an area to be subjected to such surveillance and control circuitry connected with the system, the system generating a readiness signal when prepared to effect electronic article surveillance and being thereafter responsive to an input signal to commence electronic article surveillance, the control circuitry being responsive to the readiness signal selectively to generate the input signal and being adapted to suppress generation of the input signal responsively to further input to the control circuitry indicative of the existence of a predetermined condition. The predetermined condition is the presence in the area of a further electronic surveillance system which has not generated its readiness signal, and the invention looks to interconnecting the further system to the control circuitry.

Abstract: A detection apparatus for monitoring specified safety eyewear being worn by persons who are either passing into or are located in the designated area which requires that a person in the area be wearing the specified safety eyewear. The detection apparatus includes an infrared reflector which is located on the specified eyewear, an infrared transmitter for transmitting a beam of infrared radiation towards the person, an infrared receiver which receives reflected radiation from the infrared reflector on the safety eyewear being worn by the person and an alarm which is normally inactive and which remains inactive as long as infrared radiation from the transmitter is reflected back to the infrared receiver from the reflector. The alarm is activated when infrared radiation is transmitted to the person and not reflected to the receiver due to the absence of specified safety eyewear which contains the appropriate infrared reflector.

Abstract: A remote solar powered radio frequency transmitter assembly and radio receiving and signalling system to indicate delivery of mail. The transmitter means is powered by a rechargeable battery system which is normally recharged by solar cells located on the transmitter means housing. The transmitter means comprises an FM radio transmitter operating in the 49 Mhz band, with a signal strength sufficient for providing an alarm signal to receive at least 4,200 feet distant over unbroken terrain. Upon opening of the mailbox door approximately 30 degrees (30.degree.), a switch initiates a six (6) second operation of the transmitter means. A receiver is provided to detect the radiated signal, and to energize visual and audible signals in response thereto. Ten position DIP switches are provided at both transmitter means and receiver to vary the frequency of operation so as to minimize or eliminate interfering signals. The transmitter means is secured to the mailbox by a single attachment post.

Abstract: A frequency-swept electromagnetic field is generated in an interrogation zone and signals received from the interrogation zone are processed to detect the presence of a marker with a resonant tank circuit in the zone. Detection is achieved by the use of averaging techniques of a plurality of sweeps wherein peaks above a defined level are stored in a persistence table. A symmetry test is made on the peaks and if the peaks are persistence and symmetrical the presence of a marker is indicated since background noise will not exhibit persistence and symmetry.

Abstract: A pool security system incorporates a passive infrared element and an underwater acoustic element. The passive infrared detection element generates a thin infrared layer which overlays the entire water surface area of the pool. As a heat generating body passes through the infrared layer, the infrared element detects the body and generates a first detect signal. As the body enters the water, it causes waves which propagate through the water. These waves are detected by the acoustic element. The acoustic element continues to receive waves generated as the body struggles at or below the water surface. A master control circuit is coupled to the infrared and the acoustic elements to receive the first and second detect signals. The master control circuit is designed to detect when the first detect signal is received, followed a predetermined time by the second detect signal. When this occurs, the master control circuit will generate an alarm signal, thus alerting others of the danger of unauthorized entry.

Abstract: A detector detects the variation of resistance between fingers of a human's hands which varies in response to his mental condition. When the mental condition is varied and the resistance between fingers is changed, the detector detects such resistance variation, which is then converted into an electric signal. This electric signal drive light emitting diodes (LEDs) or the like so that the user of this detector can realize his mental condition by watching the light. By further providing a lamp, an image film and a lens, the user can watch the image on the image film when light radiated from the lamp projects such image onto the lens. This detector is useful for meditation and mental training because the user can realize the variation of his mental condition by watching the light or image.

Abstract: The present invention is an electronic control apparatus for control of an automatic transmission in a motor vehicle which controlling a motor to shift the transmission to said desired transmission state when the desired transmission state differs from the present transmission state signal. The electronic control apparatus detects and stores any faults in controlling the motor, and generates an output indicating any stored fault codes in response to a particular operator input. In the preferred embodiment the operator input is via plural push-buttons with corresponding lamps. In normal operation a single lamp is turned ON to indicate the present gear. Fault codes are indicated by turning ON the lamps in a code corresponding to the fault code. Detected faults include invalid transmission state signal, time out without completing the shift and over current in the motor.