Abstract:
A correction means for offsetting the effects of varying temperature on the torquer scale factor in a gyroscope, accelerometer, or similar input function measuring instrument having a torque-to-balance feedback servo loop. The correction means comprises an electronic correction network configured in the servo loop of an input function measuring instrument for generating a signal which is a measure of the desired input function and is substantially independent of any change in the torquer scale factor over a specified temperature range.
Abstract:
A printed circuit board connector with right-angle pins therein having drilled holes which are aligned with one leg of the pins internally of the body, removing a section of the pin and thus causing an electrical gap or open circuit. A set screw is threaded into each hole to close the circuit when screwed in to contact the severed end of the pin leg. When any one of the plurality of set screws is backed out a short distance, the screw side still contacts one of the pin legs but the screw end separates from the other pin leg to cause a pre-faulted open circuit to be diagnosed by service trainees. The same circuit board can be used to provide any of several faults by selecting which screw to loosen.
Abstract:
Strips or sheets of material comprising filaments impregnated in a binder material are stressed in a stressing machine to a sufficient degree to cuase a number of the filaments to break. The strips or sheets are then layered and molded together to form a laminated composite. The composite material so formed is found to have significantly improved structural characteristics.
Abstract:
A ball-bearing retainer for suppressing gross oscillations of the retainer, balls, and raceways of high speed bearings. The retainer has a generally cylindrical shape and has a plurality of ball pockets. It is designed for insertion between two relatively rotating members which have confronting coaxial cylindrical surfaces. These surfaces may be formed integrally with the rotating members themselves or may be raceways placed between the rotating members for accommodating the balls held in the retainer. Formed upon a surface of the retainer and extending toward one or the other of the relatively rotating members is a plurality of lands or portions extending radially from the retainer. The lands are three in number symmetrically disposed about the inner or outer peripheral walls of the retainer. The centers of the lands are a nominal 120* apart and each land subtends an angle of 30* or less. Clearence between the surface of the lands and the confronting surface of one of the rotating members is typically of the order of tens of thousandths of an inch.
Abstract:
A light beam is generated by means of a narrow band collimated light source, and this light beam is modulated in accordance with an electrical input signal to be identified. The light beam is then optically scanned at a predetermined scanning rate to produce an optical image of the input signals against a time base. Light from this optical image is passed through a holographic reference transparency, which is a spatial filter corresponding to the Fourier transform of the image of known electrical signals, the light passing through the transparency being fed to a detector. Successive reference transparencies are utilized until correlation between the transparency and the input signal to be identified is indicated by a peaking of the detector output which is sensed by a correlation indicator.
Abstract:
A plurality of strip filaments provide a source of electrons. A deflector electrode in the form of a flat dish is placed behind the filaments, and director electrodes which may be in the form of wire meshes, are placed forward of the filaments in the direction in which the electron flow is desired. Additional electrodes which may be in the form of narrow plates are placed along the ends of the filaments to compensate for fall-off in emission at the filament extremities. The various electrodes are positioned relative to the filaments and have potentials applied thereto such that the uniform distribution of electrons is provided over a predetermined area throughout which electron flow is desired.
Abstract:
A commutator generator for generating a plurality of station gating signals each having different gate time. A resettable binary counter provides output timing signals which are gated with the commutator generator output signals. Control circuitry selects the number of pulses to be elapsed before changing the state of an output counter, as well as resetting the binary counter. The output counter, in turn, is coupled to a decoder which produces the commutator generator output signals. A station selector initially sets the output counter to one of the station gates. Further, a station envelope is coupled to an envelope processor to initially enable the resettable counter.
Abstract:
Apparatus for launching a vehicle-towed pyrotechnic type flare or similar structure incorporating means for launching, automatically braking, and enabling the flare to be jettisoned from the end of a line attached to a tow reel when desired.
Abstract:
Rise time, fall time, and width of a single short duration pulse are measured with no a priori knowledge of the pulse. First and second level detectors are used to respectively start and stop a ramp generator. The level detectors are biased to fire at certain defined percentages of the leading and/or trailing edge of the pulse depending upon which time parameter the detectors are measuring. A peak level detector and hold circuit connected to the ramp generator output gives a voltage amplitude proportional to the ''''on'''' time of the generator and thus indicative of the time interval being measured. To supply the level detectors with the proper information, an input and logic section produces from the incoming (positive) pulse its peak amplitude, negative peak amplitude, a delayed positive pulse, a delayed negative pulse, and timing signals for enabling and disabling the level detectors as necessary.
Abstract:
A method of forming titanium sheets and the like in which a sandwich structure consisting of a titanium sheet is placed in an envelope constructed of mild hot rolled steel, forming the sandwich structure utilizing a stretch forming operation, bracing the sandwich structure insuring that it will retain its shape during a stress-relieving operation, performing the stress relieving operation and removing the shaped titanium sheet from the envelope.