Patents by Inventor John D. Leighton

John D. Leighton has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5721484
    Abstract: A power supply filter is constructed with a capacitive element and an active element coupled to a filtered node and an impedance coupled between the filtered node and a power supply node. The filtered node for carrying a filtered version of a power supply signal on the power supply node. The active element having electrical characteristics such that the addition of the active element to the power supply filter reduces the amount of capacitance needed from the capacitive element to achieve a desired pole frequency for a given voltage drop across the impedance element.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: February 24, 1998
    Assignee: VTC, Inc.
    Inventors: Tuan V. Ngo, John D. Leighton
  • Patent number: 4404439
    Abstract: Two embodiments of improved brake light switches that are integrated into the brake pedal and are actuated by the application of pressure to the pedal. In one embodiment, the pedal pad is movable relative to the pedal and this relative movement effects closure of the switch.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: September 13, 1983
    Inventor: John D. Leighton
  • Patent number: 4300409
    Abstract: A resilient lever assembly which incorporates spring action whereby the resilient portion of the assembly constantly urges a rigid lever against a lever movement resistance member connected to the lever. The action is accomplished by securing the resilient support to the fixed member in a rotational position such that the resilient support is stressed in the proper direction. The resilient support is in the form of an extension of the lever having spring-like properties and secured at its outer end to a fixed member. The lever movement resistance member may be in the form of a stop adjacent the rigid lever, or the valving of a vehicle brake booster against which the lever is urged. In one version of the invention, the resilient lever extension is secured to the fixed member by means of a U-shaped bracket. In another version, the resilient lever extension is secured directly to the fixed member.
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: November 17, 1981
    Assignee: Betty Leighton
    Inventor: John D. Leighton
  • Patent number: 4297550
    Abstract: A method and construction for assembling the brake pedal and associated switches and valve for an automotive vehicle in the vehicle so as to insure consistent operation and reduce assembly time. The construction comprises a bracket securable to the vehicle firewall and carrying the brake pedal lever which is hinged thereto by a torsionable rubber sleeve bonded to inner and outer metal sleeves or by a spring-like portion of the lever. The resilient hinge is biased so as to urge the brake pedal lever away from the firewall, and one or more switches and valves are carried by the bracket or brake pedal lever in a manner which will cause operation of the switches and valves when the brake pedal is actuated. The method of the invention includes the steps of assembling a module comprising the bracket, brake pedal lever switches and in some cases a portion of a push rod, biasing the hinge, connecting the module to the brake cylinder and securing it to the firewall.
    Type: Grant
    Filed: March 1, 1979
    Date of Patent: October 27, 1981
    Assignee: Betty Leighton
    Inventor: John D. Leighton
  • Patent number: 4130027
    Abstract: A resilient lever assembly which incorporates spring action whereby the resilient portion of the assembly constantly urges a rigid lever against a lever movement resistance member connected to the lever. The action is accomplished by securing the resilient support to a fixed member in a rotational position such that the resilient support is stressed in the proper direction. In one form, the resilient support and its securing components comprises a rubber bushing between two sleeves, one fixed to the lever and the other to the fixed member. In another version of the invention, the resilient support is in the form of an extension of the lever having spring-like properties and secured at its outer end to the fixed member. The lever movement resistance member may be in the form of a stop adjacent the rigid lever. In another version, the lever movement resistance member could comprise the valving of a vehicle brake booster against which the lever is urged.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: December 19, 1978
    Assignee: Betty Leighton
    Inventor: John D. Leighton