Abstract: A unitary retainer socket device for providing positive interconnection between a male pin conductor of an electrical instrument and exposed conductor runs of a flexible printed circuit material is formed to be inserted into and extend from both ends of an open ended aperture in a rigid panel that supports the flexible printed circuit. A base element is centrally formed in the socket and has spring biasing tabs extending therefrom to prevent insertion of the base element into the support panel aperture and to provide holding forces to the flexible circuit material against the surface of the support panel. Pairs of legs extend from the base element at a distance that exceeds the depth of the support panel aperture so as to extend therethrough. Retrorse tabs are defined at each leg pair to lockingly retain the socket in the aperture by engaging the end of the aperture opposite to the insertive end.

Abstract: An electrically conductive liquid level sensor utilizing a pair of parallel closely spaced electrically conducting probes that are exposed within a liquid container for immersion in said liquid. The sensor includes an electrical insulator partition extending between the probes so as to interrupt any direct path therebetween while at the same time localizing the conduction path to a narrow band of liquid levels due to the close spacing of the probes.

Abstract: A hand held voltage sensor in which a low impedance test lamp mode or a high impedance voltage test mode is selectable via a thumb accessed slide switch. In the high impedance mode, three light emitting elements provide indication of the value of voltage potential between a probe conductor and an associated ground conductor being above, below or pulsing above an adjustable threshold level.

Abstract: A plurality of sensing means are actuated by the rotation of a take-up reel in a reel-to-reel type tape deck wherein the frequency of activation of switches determines whether or not drive power should be continued to the tape deck drive mechanism. Monostable multivibrator circuits are employed to respond to the bi-level signals output from the switch means and provide respective enabling signals to a logic circuit so that when either one of the multivibrators circuits provides an output in response to the rotating switch means, the logic circuit will continue to allow driving power to be supplied to the tape deck.

Abstract: A simplified heads-up display system for projecting a virtual image of a broad-band display source employs a pair of identically constructed reflective holograms, wherein one of the holograms is in the field of view of the observer to correct dispersion and provide the virtual image of the display source within the observers field of view.

Abstract: A portable hand-held open circuit voltage tester for a storage battery that contains a facility for permanently marking the positive terminal post of the tested battery when the open circuit voltage is within a predetermined range. An enabling circuit provides an indication of the open circuit voltage level and enables the marking mechanism for activation by the operator.

Abstract: High frequency ultrasonic energy is applied to a liquid medium to produce low micron size cavitation in the liquid for enhancing the cleaning or etching action of exposed surfaces within the liquid. An ultrasonic transducer is bonded to a vibration coupler which is formed of a material that is inpervious to the liquid medium and functions to efficiently transmit the ultrasonic vibrations to the liquid medium. The coupler is partially immersed in the liquid while maintaining the transducer elevated above the liquid.

Abstract: The invention provides sensing switches for indicating proper rotation of a take-up reel in a tape recorder-player and for sensing reverse rotation of the take-up reel and provides a logic circuit for stopping the drive of the take up reel when the tape is not properly fed or when the take-up reel rotates in a reverse direction.

Abstract: The invention relates to a connector for enabling wires to be connected to a battery terminal, comprising a conducting component having a portion for attachment to the battery terminal and a further portion formed with bores for enabling additional connections to be made.The conducting component comprises a base plate 10 formed with bores 12 capable of directly engaging with male screwthreaded members for establishing the desired additional connections. The portion 9 for connection to the terminal 3 projects from the plane of the base plate 10, and the base plate 10 is provided with support flanges 11 to space the bores 12 from the surface of the battery.

Abstract: An open-ended diffusion chamber and an adjacent combustion chamber located in the nose of a projectile to receive ram air that ignites a solid fuel material within the combustion chamber. A pair of oppositely disposed lateral steering ports are provided aft of the combustion chamber and are interconnected therewith via a diverting valve that is controllable to selectively divert the escaping combustion gases from the combustion chamber to one or both of the steering ports to thereby change or maintain the trajectory course of the projectile after firing.

Abstract: An improved detector array for scan receiver applications whereby each contiguous element of the array is connected to a summing port with its adjacent element.

Abstract: Improved pushbutton end caps of a mechanical tuner pushbutton assembly for use on a radio receiver whereby a portion of each end cap is pivotable to two orthogonal orientations by manual depression on two defined areas displaced above and below the pivot axis to provide a flush face appearance to said radio when in their first orientation and to allow for station resetting when in their second orientations.

Abstract: A pneumatic tire profile height sensor system which includes a compressible sensor combined with an electrical signal generator mounted within a vehicle wheel and electrically connected through an inflation valve stem to a signal transmitter mounted on said valve stem external to the wheel.

Abstract: An injector mounted sensor, providing an electrical signal indicative of the opening and closing of a hydraulically actuated injector valve, is monitored to determine the time period for which the injector valve is opened and to determine the frequency rate at which said injector valve is opened. The time period and frequency rate are compared with a predetermined table of values to derive a fuel consumption value for each time period that the injector valve is open.

Abstract: A method of detecting electrical faults that may occur in a vehicular air suspension system utilizing height sensors and air springs mounted between sprung and unsprung components of the vehicle. The method involves defining specific signals that are available from a properly functioning and an improperly functioning height sensor during both its energized and de-energized conditions and comparing the output signals with the defined signals to determine fault occurrences and communicating that event to the vehicle operator when the number of detected fault occurrences exceed a predetermined number.

Abstract: A data communication system for providing data transmission between a plurality of individually addressable local computer networks, by utilizing single node switching across a common passive bus medium. The passive bus medium is characterized as having a plurality of separate conductors of limited length that are each commonly connected to individual bus interface circuits for each local computer network. Each bus interface circuit has a number of dedicated address data ports, message data ports and control ports that are connected to separate dedicated conductors of the passive bus medium for transmitting data to and receiving data from other local computer networks. Each message transmission of data on the passive bus medium is divided into a number of mini-packets each of which contain a number of parallely transmitted bits corresponding to the number of dedicated address and message conductors in the passive bus medium.

Abstract: A circuit for sampling the conditions of a liquid level sensor for a short period of time after the circuit is turned on and energizing a warning indicator for an initial check-out period that is followed by continuous energization in the event the sensor indicates a low liquid level condition during the sampling period.