Patents Represented by Attorney T. F. Lenihan

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  • Transistor mixer
    Patent number: 4850039
    Abstract: A mixer for mixing first and second signals for providing a difference signal comprises a mixing transistor. The first and second signals are applied between the base and emitter electrodes of the transistor. A non-linear impedance is coupled in series with the emitter electrode. Spurious signal components are reduced in amplitude compared with the difference signal.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: July 18, 1989
    Assignee: RCA Licensing Corporation
    Inventor: Max W. Muterspaugh
  • Automatic determination of time base in electronic time-keeping apparatus
    Patent number: 4763193
    Abstract: An AC line signal of unknown frequency is compared to a signal of known reference to determine the frequency of the AC line signal. Thereafter, the AC line frequency signal is used as a time-base for keeping real time.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: August 9, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Warren C. DeVilbiss
  • Input device for a display system using phase-encoded signals
    Patent number: 4745402
    Abstract: The invention relates to a display system using a remote control handunit having "pointing function" capability for moving a cursor displayed on a display screen by changing the angular position of the remote control handunit. Specifically, the individual transmitting transducers of the remote control handunit are driven with signals having a predetermined phase relationship relative to each other such that the resultant phase received by the receiver is indicative of transmitter angular position.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: May 17, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Victor Auerbach
  • Wave solderable RF shield member for a printed circuit board
    Patent number: 4626963
    Abstract: An apparatus is disclosed for wave soldering a printed circuit board having an RF shield member mounted on the component side of the board with tabs extending beyond the electrical conductor side of the printed circuit board. Holes provided in the shield tabs allow the solder wave to pass through the tab to reach contact pads immediately behind the tab and also to reduce splash back and excessive build up of the solder caused by the solder wave striking the tab. Use of the apparatus eliminates costly and time consuming hand soldering operations for the RF shield member.
    Type: Grant
    Filed: February 28, 1985
    Date of Patent: December 2, 1986
    Assignee: RCA Corporation
    Inventor: Walter F. Speer
  • Isolation of RF signals in a RF shield aperture
    Patent number: 4622527
    Abstract: An apparatus is disclosed which presents a high impedance to unwanted RF signals which may be otherwise coupled to jumper wires which traverse the boundary between RF shielded areas. Specifically, a conductor for connecting two circuits separated by a shield wall is surrounded by a ferrite material which is positioned to extend through an aperture of the RF shield.
    Type: Grant
    Filed: June 20, 1985
    Date of Patent: November 11, 1986
    Assignee: RCA Corporation
    Inventor: David J. Carlson
  • Walkie talkie
    Patent number: D302429
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: July 25, 1989
    Assignee: General Electric Company
    Inventor: Stuart D. Leer