Abstract: A lamp monitor provides a sense resistor for each lamp circuit as a special sense terminal member with a series resistance and sense terminals connected to a circuit board in a lamp monitor module. A multiplexing arrangement allows selection of the circuit to be monitored. The monitor samples the voltage across the series resistance by first connecting a capacitor across the sense terminals to be charged to the voltage and then disconnecting the capacitor from the sense terminals and connecting it across the input of an amplifier. The voltage across the lamps is sensed to provide a ratiometric reference for the digitizing of the amplifier output in an analog to digital converter; and a digital computer corrects the input digital signal with a stored non-linear normalization factor relating current to voltage in the lamps.

Abstract: A solid state relay circuit which utilizes a metal oxide power semiconductor field effect transistor (MOSFET) as an output switching device to switch power to load circuitry by an electrically-isolated coupling arrangement including light emitting diodes (LEDs) and a photodiode array. An arrangement is provided for sensing the current through the LED coupling arrangement to determine when the solid state relay circuit has been operated and, in turn, to operate indicating circuitry. The circuitry may also be utilized as self testing circuitry to check the integrity of components of the input portion of the circuitry.

Abstract: A method and system for transferring information between a moving vehicle and a stationary information location having a vehicle detector system with a loop antenna by using the loop antenna as either the receiving antenna for signals transmitted from a moving vehicle or as the transmitting antenna for signals generated by a transmitter located at the vehicle detector site for transfer to a receiver mounted on a moving vehicle. The information is encoded on a carrier having a frequency outside the normal frequency range of the vehicle detector system, preferably by interrupted carrier pattern processing.

Abstract: A fluid status detection system includes a plurality of probes connected to a controller. The controller includes a number of relays that may be programmed to latch either open or closed upon receipt of any one of several different alarms from the probes. The system includes a function that if a relay is latched and a second alarm occurs, then the relay releases for a second, then relatches. The system permits an operator to select the release and relatch latch function individually for each of the relays and to store the selection in a digital memory.

Abstract: A CO based, Diesel discriminating, fire detection system and method is disclosed which significantly reduces the threshold of CO needed to detect a fire in a mine that also contains CO from Diesel equipment without a corresponding increase in the number of false alarms. The system measures both the CO and NO levels at many points throughout the mine and calculates a CO/NO ratio for each of these locations. A long term average concentration (4 hours) and a short term average concentration (1 hour) for both CO and NO are continually updated to reflect the changing dynamics of the mine environment. Using the CO/NO ratio, the detection system can effectively differentiate between CO produced by a Diesel and CO produced from a fire and can activate an alarm when the CO level resulting from a fire exceeds a predetermined threshold level.

Abstract: The present invention relates to a railing selected among hollow railings, grilles, tubes or the like in which a continuous sensor made of an optical fiber extends, which railing is filled with a suitable filling material, the sensor fiber being connected to outside control and/or alarm units to form a complete circuit. The optical fiber has advantageously a numerical aperture (NA) of 0.08.ltoreq.NA.ltoreq.0.5 preferably the following parameters:Bending loss .alpha.exp(-.beta.r), r-Bending radius .beta..alpha.N.A. (b/a) .gamma. b-cladding radius, a-core radius of the fiber, 0.1.ltoreq..gamma..ltoreq.3.0.The filling material has preferably the form of pellets and is suitably selected among glass, steel, ceramics or sand.The railing preferably comprises a binder selected among soft rubber and plastics, e.g. a polyester. The binder may comprise also a material selected among an irritating material and a dye.The railing may also be a system of railing wherein the sensor extends through all the railings.

Abstract: A flame scanning system for monitoring a combustion process by detecting flame emission characteristics in the ultraviolet light spectrum. A metered relative flame intensity signal, flame-off signal, and flame-on signal are provided. A self-diagnostic feature produces a flame marginal signal indicative of substandard flame operation; a tube marginal signal indicative of imminent UV tube failure is also produced. A scanner shutter mechanism includes a check failure feature for detecting UV tube failure. An electronic assisted sighting indicator is also included to assist during on-sight scanner positioning and to provide optimum scanner placement.

Abstract: A wetness detection system for detecting dampness in diapers or other articles of clothing includes a detector/transmitter which is attachable to the diaper or clothing. The detector/transmitter produces and transmits a signal when no urine or other conductive matter is present in the diaper or clothing, and this signal is received by and retransmitted from a retransmitting station which may, for example, be located on the bed of the person wearing the diaper or clothing. The retransmitted signal is ultimately received at a central station for alerting an attendant when a wetness condition is detected. Since signals are transmitted when no urine is present, the absence of signals over some predetermined period of time indicates that wetness is present.

Abstract: An alarm system for sensing entry through premise doors and windows, including primary and secondary circuits joined by a transformer. The primary circuit has an alarm including a siren and floodlight plus a time delay relay (with automatic reset) for activating the alarm for preset periods. A siren delay tube permits siren on-off operation in preset cycles. The secondary contains a plurality of automatic resetting door and window switches. A solenoid operated trigger switch has switch contacts wired to energize the time delay relay whereby the trigger switch solenoid is wired in the secondary for actuation by any door or window switch. A rocker switch in the primary selectively energizes the floodlight without activating the siren and selectively deactivates primary power to the transformer in coaction with time delay relay when the siren and floodlight are activated thus deactivating secondary power to the doors and windows.

Abstract: This invention is an alarm lock which uses a key-releasable cable to secure an article to be protected to a fixed object. Should the cable be cut, a coded audio alarm is emitted, alerting the owner of the article. The cable contains a conductor which is connected to an alarm circuit sensitive to a resistance in series with the cable. Attempts to defeat the cable by jumpering or cutting or otherwise varying the resistance causes the alarm to be set off. Pulling the cable (tampering) also causes the alarm to operate, for a fixed period of time. The lock unit can be fixed to the handle bars of a bicycle and the alarm sound can be generated manually whereby it can be used as a horn.

Abstract: An alarm system for a swimming pool or the like whereby small inexperienced children or animals are detected prior to entering the pool or after an unauthorized entry into the water of the pool. The invention comprises the use of a height sensing apparatus employing fibre optics and a logic circuit whereby an interruption of a pair of different elevations of light paths is accepted and the alarm remains silent and the interruption of the lowest light path only is reflected sounding an alarm. The invention further comprises the use of fibre optics and a movement sensor connected to the optics. Any impact on the water surface of the pool causes the sensor to change the state of the light transmission therethrough by transmitting or interrupting light transmission. This change of normal state activates the alarm. The invention still further comprises a wireless means for detecting a person in the pool water or a man overboard from a ship or the like and sounding an alarm.