Abstract: A toilet seat for use by invalids, infirm persons or the like is disclosed which is superimposable upon a conventional toilet seat. The superimposable toilet seat is adjustably mounted on rails, and which rails provide support and assistance to the user of the seat.

Abstract: A solenoid actuated combined fuel injection and intake valve supplies an air-fuel mixture to an electronic fuel injection system for an internal combustion engine. In one embodiment of the invention fuel injection is controlled dependent upon the operation of an auxiliary air-fuel intake valve while in another embodiment of the invention fuel injection is controlled independent of the operation of the auxiliary valve.

Abstract: A redundant inertial measuring system includes three strapdown platforms each having two inertial sensors. The sensitive axes of the sensors are discretely disposed relative to the faces of a dodecahedron. The sensors and their associated electronics are physically and electrically separated from each other within each of the platforms.

Abstract: A circuit configuration for providing an analog output signal at any instant in time, and which is equal in magnitude to a selected signal of a plurality of analog input signals. If any one of the input signals are unwanted the circuit "votes" or ignores the unwanted signal. The voting is repeated until a predetermined number of signals remain, irrespective of the original number of input signals, whereupon the output signal is selected from the remaining signals.

Abstract: A flap compensation system is provided which reduces the pilot applied force required to hold the pitch attitude of an aircraft within specified limits upon pilot operation of the aircraft flaps by automatically displacing the horizontal stabilizer of the craft as a function of flap displacement.

Abstract: A sensor including means for operating the sensor in angular rate measuring and stabilization or rate integrating modes. When operating in the rate measuring mode, a loop is closed through an amplifier and torquer to null the sensor and when operating in the stabilization mode said loop is open and another loop is closed through a load to maintain the sensor at null. In the stabilization mode, the amplifier is used to apply command rate and drift correction signals to the sensor.

Abstract: A force measuring system includes a signal source for energizing a capacitance bridge arrangement. The bridge arrangement includes a pair of fixed capacitors and a pair of variable capacitors formed by a displaceable force sensitive element normally disposed in a null position between two fixed plates. A force applied to the system displaces the force sensitive element from the null position toward one or the other of the fixed plates to unbalance the bridge whereupon a signal is provided which is applied to a servo amplifier. The servo amplifier provides a signal which is applied to the displaceable force sensitive element, and which element is restored to the null position due to the electrostatic reaction occurring upon appropriate energization of the fixed plates. The signal provided by the servo amplifier is an accurate measure of the sensed force.

Abstract: For use with an inertial sensing device such as a rate gyro, accelerometer or like device, combined means for sensing an inertial condition and for providing torquing and damping functions for controlling the response of the device to the condition.

Abstract: A rate integrating device includes a torquer in open loop configuration for torquing the device to null and a load connected to the device in closed loop configuration for maintaining the device at null. The load loop includes electrical means whereby the maintenance of the device at null is controlled independent of its dynamic characteristics for increased accuracy and stability.

Abstract: A voter circuit with averaging means eliminates a deadzone characteristic inherent in prior art voter circuits when unvoted or unwanted input signals are near zero. Elimination of the deadzone characteristic renders the voter usable in small signal regions.

Abstract: A capacitance to digital conversion system wherein condition sensing capacitors are arranged with reference capacitors in a circuit configuration so as to eliminate the need for an absolute a.c. voltage thereby imparting a high degree of precision to the system. Primary error sources are virtually eliminated since all operations are performed on an error signal and a single oscillator drives both sensing and reference capacitors so that frequency variations in the output of the oscillator have no effect on the accuracy of the measurement being made. Additionally, the high degree of precision is accomplished with a significant reduction in hardware.

Abstract: Measurement of the torsional and bending capabilities of the lower extremities of a human body is accomplished by applying torsional (twisting) and bending (pitching) forces to the lower extremities through the muscular strength of a subject and to the limit of significant pain or discomfort. Means are provided for measuring the applied forces to provide torsional and bending indices, and which indices may be correlated for a variety of purposes desired.

Abstract: A hydrostatic suspension system for supporting a cylindrical mass, such as an inertial mass, within a housing filled with viscous fluid while eliminating contact between the mass and housing. With the arrangement described tolerances and concentricities of the mass and housing are relaxed to practical values.

Abstract: For use with a microwave landing system of the type including a ground based station for generating a relatively wide aircraft navigational beam and airborne equipment for deriving precision azimuth, elevation, and range data therefrom, airborne equipment utilizing the data to guide the craft along a multi-segment path so that each of the segments is asymptotically captured by the craft.

Abstract: A micro-programming fault analyzer for a high speed general purpose computer permits operator interrogation of the computer address lines whenever a selected instruction is being performed. The selected instruction is operator initiated and the fault analyzer responds to information at the computer address lines to generate the necessary functions for location of a malfunction.

Abstract: A fail safe logic monitor wherein a multi-bit logic word is multiplexed into a comparator and compared thereby with a multiplexed "hard wired" reference word. The comparator provides an output compatible with conventional a.c. fail safe fault logic. Features of the invention include self monitoring any single internal failure for indicating a fault while the monitor is on line and automatic test ability and compatibility with existing fault logic.

Abstract: A communications device arranged to be worn in intimate contact with the body of a user and without interference with bodily movements includes a radio transmitter and receiver for communicating with a remote station. The transmitter includes means arranged therewith and operative in conjunction with the body of the user for providing a relatively high transmitting frequency range. The device is miniaturized so as to provide predetermined transmitting and receiving circuit characteristics and is encapsulated so as to be essentially floatable, resilient and waterproof whereby it is rendered suitable outdoor activities such as sports and the like.

Abstract: A method of visually detecting defects in a printed circuit board comprising preparing a mask with a light blocking pattern corresponding to the desired printed circuit, illuminating the printed circuit board through the mask with the light of a color complimentary to the color of the printed circuit board and with the light blocking pattern in registry with the printed circuit and inspecting the printed circuit board for light reflected from defects in the printed circuit not present in the light blocking pattern on the mask. The defects are readily apparent as bright spots on a dark background.

Abstract: A synchro having a rotor with windings supported by a shaft for rotation through an angle of approximately 360.degree. relative to a stator in which the rotor windings are connected to external circuitry by leads each of which is formed into a coil with a straight portion extending therefrom. The leads are disposed oppositely in a hollow portion of the shaft with the coil of each of one lead encircling the straight portion of the other lead and with the straight portions of the leads extending axially of the shaft.

Abstract: In a door assembly of the type including a core sandwiched between a pair of one piece panels and an opening in the upper part of the door for accepting a frame which receives removable screen and glass inserts, the core and frame are arranged so that the inserts may be stored in the bottom part of the door. The inserts and frame cooperate to retain decorative panels and/or edgings and the like.