An improved circuit for indicating the tuning of a heterodyne television receiver to an active station and for providing an output signal indicative thereof is disclosed. The circuit employs a tuned circuit resonant at an intermediate frequency of the receiver for sensing proper tuning but allows this resonant circuit to sense only during the concurrence of flyback and synchronizing signals. A Darlington pair senses resonance in the resonant circuit and provides a search tune stop signal when th...

A system for marine search and salvage operation wherein sensing and grappling means are suspended by a pipe string from a surface vessel.

1. A tracking sonar system comprising: A plurality of essentially identical Hydrophones, A rigid framework supporting the hydrophones in approximately equally spa relationship, equidistant from a common locus point and identically oriented relative to the locus point, A plurality of essentially identical brush contacts, one for each of said hydrophones, Signal transfer means coupling each hydrophone to a brush contact, A second rigid framework supporting the brush contacts in an assembled relati...

A microprogrammable processor is operative to control a plurality of disk storage devices in response to channel commands received from the input/output processor of the system. The microprogrammable processor includes storage which allows buffering of search argument bytes received from the input/output processor. The microprogrammable processor in response to a special search command stores the bytes while it compares these bytes with bytes of a first record. During the remainder of the search...

Search radar apparatus containing an MTI video processing unit provided with: a canceller for generating video signals of moving targets; a zero-velocity filter for generating clutter video signals; a conditional circuit connected to the canceller and the filter for generating per range quant of each radar scan a clutter switching signal if for the rang quant the signal value obtained with filter is greater than the signal value obtained with the canceller; a combination circuit connected to sai...

Apparatus for searching for range indicating pulse signals received as part of distance measuring equipment which first form a list of distance indications in a first search time. The distance indications obtained in a second search time are then logically combined with those indications in the first list and any combination that results in a difference value of less than a prescribed amount is retained for list updating purposes until there is only a single distance indication left in the list....

A torch particularly for use in hazardous conditions has safety and battery power warning features. The supply from a power source (34) to a light source (12) includes a frangible conductive element (132) in the conductive path to the light source (12). The conductive element (132) is provided on a torch glass (128), so that if the glass (128) breaks, the power supply to the lamp (12) will be cut off, thereby eliminating the risk of sparks, and exposure of the hot lamp element to the atmosphere....

A sensor arrangement in a tracking or search head which is equipped with a two-axis cardan frame system for the movements of a sensor relative to the search head. In the sensor arrangement of the above constructive type, the cardan frame system and the sensor which is axially offset ahead thereof, are supported by paired spherical surfaces which are passed through by a spine passageway and are interconnected through the intermediary of a parallelogram linkage.

1. In a search-while-track radar system for determining the angular posit of a target without stopping the antenna, Saturated amplifier means adapted to receive video return signal pulses from said target, Said saturated amplifying means having a storage means for storing the bias developed by said saturated amplifier means and allowing said bias to decay at a rate proportional to the change in amplitude of the video returns from pulse to pulse, and Comparator circuit means connected to said sat...

A search and recovery device includes a deflated balloon, a pressure cartridge enveloped by the deflated balloon and containing under pressure a gas which is normally lighter than air, a gas-release means in the cartridge, an actuator means enveloped by the deflated balloon and arranged in a position relative to the cartridge to actuate said gas-release means, and hammer means outside said balloon arranged to apply force through said balloon to said actuator means, causing release of gas within ...