System Comprising Plural Fluidic Devices Or Stages Patents (Class 137/814)
  • Patent number: 4246990
    Abstract: A remote control system for an automotive transmission in an earth-moving vehicle which includes a fluidic variable frequency oscillator having a variable feedback loop controlled by a quadrant lever which acts as a gear shift control. When the lever is moved between spaced transmission control positions, the frequency of the signal at the output is swept through the frequencies corresponding to intermediate control positions. The waveform of the output signal is non-symmetrical having a fixed "off" time and an "on" time which varies in length as an inverse function of the frequency. The output signal is fed to a fluidic transmitter, then through a pair of conduits to a fluidic receiver. The "on" output port of the receiver feeds into a manifold developing pressure therein which varies with the degree of dissymmetry of the wave, that is, inversely with frequency.
    Type: Grant
    Filed: January 2, 1979
    Date of Patent: January 27, 1981
    Assignee: Westinghouse Air Brake Company
    Inventor: Lawrence D. Strantz
  • Patent number: 4202061
    Abstract: In an airplane having a pressurized passenger section, with a lavatory sink. The waste water from the lavatory sink is directed either to a toilet tank where it is stored, or to a drain mast line where it is discharged overboard during in-flight operation. A particular fluidic diverting system is used so that when the pressure differential between the passenger compartment and ambient atmosphere is above a certain level, air from the passenger compartment passes through a vent line to cause the fluidic system to operate in a manner that substantially all the waste water is directed through the drain mast line.
    Type: Grant
    Filed: December 29, 1978
    Date of Patent: May 13, 1980
    Assignee: The Boeing Company
    Inventor: Kenneth L. Waters
  • Patent number: 3942558
    Abstract: A torsional reed reference fluidic oscillator operating within 0.1% of the desired frequency over a temperature range of to and an operating pressure of from 1 to 4 psi. The oscillator includes a torsional reed fluidic amplifier and fluidic feedback means for converting output signals from output ports of the amplifier to first and second input signals having a phase relationship for insuring operation of the apparatus as an oscillator. The amplifier is comprised of first, second and third plates, an elongated reed member, first and second torsional members and a tab, all of which are made of material having negligible thermal coefficient of expansion and negligible change in modulus of elasticity over the temperature range. The reed member is positioned within an elongated slot in the first plate, and is fixed thereto by the first and second torsional members, wherein the major axis of the torsional members is perpendicular to the plane and major axis of the reed member.
    Type: Grant
    Filed: October 10, 1974
    Date of Patent: March 9, 1976
    Assignee: General Electric Company
    Inventors: Thomas Shaw Honda, Carl Gustave Ringwall