摘要:
A turbine engine fuel control has engine speed sensing means, fuel governor valve means, engine temperature responsive means, engine pressure responsive means, means responsive to air flow to the engine, ambient compensating means and vehicular transmission control means responsive to parameters of engine operation and engine power requests to automatically and continuously vary the engine speed and metered fuel flow to the engine in order to have such engine operate at a particular engine temperature or at certain of a plurality of predetermined selected engine temperatures.
摘要:
Electrical discharge machining is provided by generating a series of rectangular machining power pulses of a controllable on-off time duration. A circuit is included for specialized machining by providing spaced machining power pulse groups, and between each group there is included a single on-time pulse. A count down system is used to preset the number of pulses desired in each group, with the off-time between groups and single pulses being selectively adjustable in the circuit.
摘要:
An exhaust gas recirculation system for recirculating a portion of the engine developed exhaust gases back to the intake of the engine has a variably openable first valve for permitting such exhaust gas recirculation, pressure responsive motor assembly for variably opening the first valve, pressure reservoir means containing a pressure of a relatively low magnitude effective for applying such low pressure to the motor assembly for actuation thereof, and pressure bleeding control valving means positioned in accordance with the position of the throttle valve of an induction device associated with the engine for controllably modifying the magnitude of the relatively low pressure.
摘要:
The pulse generator is operable both in the regular machining mode and in the gap capacitor mode. Included in the generator is a first multivibrator for providing a train of machining power pulses of widely variable and controllable ON-OFF time ratio or duty factor. Also included is a second pulse generator operated in phase with the first but providing pulses of a substantially limited duty factor. During finishing operation in the gap capacitor mode, the pulses from the second multivibrator only are gated to provide operation of the electronic output switch and thus the generation of the machining power pulses. Accordingly, the ON-time is operated with an upper limit during the gap capacitor operating mode.
摘要:
The machine gun of this invention features a unitary bolt and bolt drive assembly reciprocably mounted within a receiver along three longitudinally extending bearing supports symmetrically arranged in spaced relation to the receiver; the bolt and bolt drive assembly, together with a recoil buffer constituting an integral operating group removably maintained within the receiver by a single latch mechanism; a bolt carrier of the assembly incorporating actuating means for cartridge belt advance, cartridge extraction and ejection; the bolt carrier housing not only a rotary, front-locking bolt but also a cam follower which fixes a firing pin to the carrier and moves within a contoured slot in the bolt for locking and unlocking it in battery. This machine gun also features a gas recoil system for the bolt and bolt drive assembly having anti-fouling porting means for purging gas from the system under high pressure after firing; an ejector operated by the recoiling bolt and bolt drive assembly independently of its velocity; an automatically engageable, selfaligning barrel and receiver latch construction; and a sight assembly featuring a zero backlash precision screw adjustment means.
摘要:
An internal combustion engine having an intake manifold has fuel supplied thereto by a fuel metering system which includes a variably positionable fuel metering valve positioned in accordance with an electrical field generated by a coil energized in accordance with parameters of engine operation; transducer means connected to the engine serves to modify and control the energization of the coil; the transducer means includes electrical circuitry having a pulse generating section, an amplifying section and an output section and further includes a pressure responsive member responsive to the pressure within the intake manifold and effective for varying the value of variable capacitance means which in turn modulates the circuit constants of the electrical circuitry in a way as to cause a corresponding variable output of the output section.
摘要:
A turbine engine control system, including a fuel control is provided with a fuel inlet, a fuel metering valve assembly responsive to electrical signals generated in response to engine speed and temperature and indicia of operator power request, a fuel bypass valving means for returning unmetered fuel from the area of the fuel metering valve assembly to an area of low pressure fuel, a compressor discharge pressure sensing means tending to further close the bypass valving means as compressor discharge pressure increases, and a pressure responsive means responsive to the differential in pressures which meters the fuel for opening said bypass valving means in order to achieve a rate of metered fuel flow corresponding to compressor discharge pressure; a variable nozzle assembly within an associated turbine engine is variably opened and closed by related control sections responsive at least in part to engine operating parameters.
摘要:
Automatic weapon having a unitary fire control group including a burst control counter rotatable in one angular direction from a starting position in synchronism with hammer release and which is automatically self resetting in the opposite angular direction upon trigger release, the fire control group being releasably connected to a frame and barrel group for snap locking assembly with a receiver, the frame and barrel group being releasably secured to the receiver by a takedown latch rotatably supported on a muzzle end of the receiver, and a gas operated piston supported for reciprocation on the barrel and having a forwardly projecting skirt circumferentially surrounding a muzzle compensator and jointly defining therewith a gas chamber when the piston is in a forward operative limit position and providing forwardly directed gas blowout.
摘要:
The machine gun of this invention features a unitary bolt and bolt drive assembly reciprocably mounted within a receiver along three longitudinally extending bearing supports symmetrically arranged in spaced relation to the receiver; the bolt and bolt drive assembly, together with a recoil buffer constituting an integral operating group removably maintained within the receiver by a single latch mechanism; a bolt carrier of the assembly incorporating actuating means for cartridge belt advance, cartridge extraction and ejection; the bolt carrier housing not only a rotary, front-locking bolt but also a cam follower which fixes a firing pin to the carrier and moves within a contoured slot in the bolt for locking and unlocking it in battery. This machine gun also features a gas recoil system for the bolt and bolt drive assembly having anti-fouling porting means for purging gas from the system under high pressure after firing; an ejector operated by the recoiling bolt and bolt drive assembly independently of its velocity; an automatically engageable, selfaligning barrel and receiver latch construction; and a sight assembly featuring a zero backlash precision screw adjustment means.
摘要:
A system for precisely setting or ascertaining the angular position of a rotating member has a quantizer for indicating a pluraity of discrete angular index positions of the rotating member and a peripheral measuring arrangement for accurately setting the angular position of the rotating member between adjacent index positions. The peripheral measuring arrangement includes an accurate micrometer headstock, having a precision measuring screw and dial, and a dial indicator with a spring loaded probe. The micrometer headstock is fixedly mounted upon the support for the rotating member such that the tip of the measuring screw is disposed near the periphery of the rotating member and the axis of the measuring screw is perpendicular to a radial line from the center of the rotating member at the tip of the measuring screw. The dial indicator is adapted to be fixedly positioned at any location whatever on the rotating member''s periphery. In order to position the rotating member between first and second adjacent index positions, the rotating member is moved until it assumes the first index position. The probe of the dial indicator is then brought into aligned engagement with the tip of the measuring screw, and subsequently, the dial indicator is fixedly attached to the rotating member with both the headstock dial and dial indicator reading zero. Next, the headstock dial is turned to displace the measuring screw by an amount corresponding to the desired angular increment between the index positions, which action causes the dial indicator to yield a reading other than zero. Finally, the rotating member is turned until the dial indicator again reads zero. The rotating member is now positioned at the desired angular position.