Abstract: A warning system provides for notification of the approach of a track guided train to a user work area perimeter. The system includes at least one sensor, preferably a plurality of sensors, for sensing the approach of a train. Data is collected and analyzed, with the analysis including the status of preprogrammed system criteria. Signals are transmitted to a remote receiving member. The remote receiving member can be part of an annunciator. An analysis member receiving and analyzes the signals and determines whether it is necessary to transmit a warning signal. At least one indicator provides a warning notification to a user. The data collection device at least periodically transmits signals to the programmable data analysis member and the analysis member determines the absence or proximity of a train.

Abstract: Automatic loom stopping apparatus for detecting yarn breakage or improper shedding defects and generating loom stop signals to be associated with a loom comprising two or three vertically spaced monitoring light beam units forming horizontal transverse light beams perpendicular to the warp yarns spanning the warp yarn path. One of the beams forms a center beam located to pass through the open shed and the other beam or beams located to be interrupted by or both of the shed sheets occupying the upper or lower limit shed positions. Detector signals responsive to interruption of the light beams by yarns are processed and applied to gating circuits and NOR or AND circuits to detect yarn breakage, broken heddles, and other shedding defects.

Abstract: Automatic loom stopping apparatus for use with a loom for detecting warp yarn breakage or improper shedding and actuate the loom stop motion means of the loom, comprising light beam emitter and detector means positioned adjacent the warp yarn path toward the supply end from the weaving zone of the loom forming a monitor light beam transversely spanning the open shed, the detector means providing a detector defect signal when any portion of a warp yarn or broken end interrupts the monitor light beam, amplifier and comparator circuitry for producing a processed defect signal responsive to the detector defect signal, timing pulse forming circuitry including a sensor monitoring rotation of the loom drive shaft for producing timing pulses indicating a predetermined phase time in the cycle of operation of the loom applied to a gate control pulse generator to produce short duration window pulses when the shed is in predetermined open condition, and first and second gate circuits conditioned by the window pulses and

Abstract: An automobile burglar alarm including a battery voltage level sensor to be connected to the positive terminal of the automobile battery for providing an output signal level indicating the battery voltage level and responsive to reduction in the automobile battery voltage when an automobile dome light or trunk light supplied by the battery is turned on to provide a changed output signal level which persists for a predetermined time period, indicative of the reduced battery voltage level, a normally non-conducting transistor connected in circuit with the automobile headlight and horn relays to a supply voltage source to energize the relays when the transistor conducts, a timer circuit connected to the transistor to supply a timed output signal for causing the transistor to conduct for a predetermined short conduction interval, and an operational amplifier coupled to the sensor and the timer circuit for supplying an amplified signal adequate to cause the timer circuit to produce the timed output signal.