Abstract: A push-pull, small signal amplifier arrangement, which employs Metal Oxide Semiconductor/Field Effect Transistors. Depletion type are employed in the first stage, while enhanced type are employed in the second stage. The two stages are directly connected together and means for controlling the gain of both stages simultaneously are included. Also disclosed are a number of configurations for various applications.

Abstract: A symmetrical discriminator and demodulator having two radio wave tuned circuits disposed parallel. The discriminator and demodulator has a common grounding connection for one end of each radio wave tuned circuit. The opposite end of each tuned circuit is connected to a coupling capacitor to couple the tuned circuit to a demodulator. Two pairs of diodes are connected to each capacitor, the two pairs of diodes being connected together in a head to tail fashion in a cross-over figure-8 arrangement. The alternate junctures of said diode pairs are connected to two output coupling capacitors to provide a demodulated signal output. The symmetrical arrangement permits the use of extremely sensitive MOS-FETs in discriminator and demodulator circuitry.

Abstract: A belt-fed, gas-operated automatic weapon of a type in which the gas pressure developed in the barrel bore during firing is ported just forward of the barrel chamber to be utilized to compress a system of opposing spring sets which in turn operate the various mechanisms involved in the automatic or semi-automatic functioning of the weapon, including ammunition feeding and ejection, bolt locking and unlocking, and reciprocation. Dual power cylinders with symmetrically arranged pistons operated by the gas pressure compress all of the springs in the opposing spring sets by engagement with a sliding carriage. The forces exerted on the bolt locking mechanism by the spring sets are greatly reduced during the interval in which the locking mechanism is operated to reduce wear on the mating surfaces and to properly sequence the unlocking after discharging a round.

Abstract: A radar system is disclosed adapted to detect relative headings between a system-equipped craft such as aircraft and ships at sea and a detected object moving relative to the ground, the system being particularly adapted to collision avoidance application. The system includes forward and rearward radar transmitter antennas, which are carried by each equipped vehicle. Each of the radar antennas is oscillated in synchronism with the other through a 180.degree. sweep, the forward radar set transmitting a scan spectrum of directional pulses of rf radiation at incremental headings through the sweep. A narrow band pass receiver detects return or echo signals in a very narrow frequency band corresponding to doppler shifted transmission frequencies. The rear radar transmits at a constant frequency and the return signal is utilized to generate a differential frequency which is the end result of a given ground speed and antenna heading.

Abstract: A belt-fed, gas operated automatic weapon of a type in which the gas pressure developed in the bore is ported just forward of the chamber and utilized to compress a system of opposing spring sets which in turn operate the various mechanisms involved in the automatic or semi-automatic functioning of the weapon. Symmetrically arranged dual power cylinders operated by the gas pressure compress all of the springs in the opposing spring sets by engagement with a sliding carriage. Bolt locking is carried out by a separate oscillating cam-operated bolt latch element cooperating with a shoulder recess formed in the periphery of the bolt, with an arrangement for reducing the bolt locking mechanism forces during the unlocking interval. Manual actuation is enabled by movement of a slider. The bolt is automatically latched open in some modes of operation. A particular interlinked ammunition belt construction is disclosed to separate each link from the belt after passing beyond the bolt.

Abstract: A belt-fed, gas-operated automatic weapon of a type in which the gas pressure developed in the barrel bore during firing is ported just forward of the barrel chamber to be utilized to compress a system of opposing spring sets which in turn operate the various mechanisms involved in the automatic or semi-automatic functioning of the weapon, including ammunition feeding and ejection, bolt locking and unlocking, and reciprocation. Dual power cylinders with symmetrically arranged pistons operated by the gas pressure compress all of the springs in the opposing spring sets by engagement with a sliding carriage. The forces exerted on the bolt locking mechanism by the spring sets are greatly reduced during the interval in which the locking mechanism is operated to reduce wear on the mating surfaces and to properly sequence the unlocking after discharging a round.

Abstract: A belt-fed, gas-operated automatic weapon of a type in which the gas pressure developed in the barrel bore during firing is ported just forward of the barrel chamber to be utilized to compress a system of opposing spring sets which in turn operate the various mechanisms involved in the automatic or semi-automatic functioning of the weapon, including ammunication feeding and ejection, bolt locking and unlocking, and reciprocation. Dual power cylinders with symmetrically arranged pistons operated by the gas pressure compress all of the springs in the opposing spring sets by engagement with a sliding carriage. The forces exerted on the bolt locking mechanism by the spring sets are greatly reduced during the interval in which the locking mechanism is operated to reduce wear on the mating surfaces and to properly sequence the unlocking after discharging a round.

Abstract: A belt-fed, gas-operated automatic weapon of a type in which the gas pressure developed in the barrel bore during firing is ported just forward of the barrel chamber to be utilized to compress a system of opposing spring sets which in turn operate the various mechanisms involved in the automatic or semi-automatic functioning of the weapon, including ammunition feeding and ejection, bolt locking and unlocking, and reciprocation. Dual power cylinders with symmetrically arranged pistons operated by the gas pressure compress all of the springs in the opposing spring sets by engagement with a sliding carriage. The forces exerted on the bolt locking mechanism by the spring sets are greatly reduced during the interval in which the locking mechanism is operated to reduce wear on the mating surfaces and to properly sequence the unlocking after discharging a round.

Abstract: A shift control system is disclosed for use with a multi-stage transmission adapted to be disposed in a plurality of states in which various serial combinations of gears are disposed between an input and an output shaft. Two position solenoid valves are provided to control the engagement of each stage. A manually energized state selector for the transmission may take the form of either a shiftable lever or a plurality of push buttons, only one of which may be engaged at a single time. Pairs of single pole switches are associated with each state of the selector switch and are wired into two sets. Power is applied to one set or the other depending upon the position of a shift direction switch. Circuitry connects each solenoid valve to at least one switch in the upshift set and one in the downshift set. The higher shift ratios may be selectively deenergized to prevent the transmissionn from being accidently disposed in an excessively high shift ratio.