Patents by Inventor Andrew M. Wohlert

Andrew M. Wohlert 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).

  • Bridge rectifier for selectively providing a full-wave or a half-wave rectified voltage
    Patent number: 4432034
    Abstract: An automatic power reduction circuit having a single silicon controlled rectifier in one leg of a bridge rectifier which is gated off when a capacitor reaches a predetermined voltage level so as to switch automatically the bridge output from a full-wave rectifier to a half-wave rectifier. An auxiliary silicon controlled rectifier is also provided to facilitate the quick discharge of the capacitor so as to reset the circuit to its initial state, thereby allowing fast, repeated operations and preventing malfunctioning upon a loss of power.
    Type: Grant
    Filed: September 30, 1981
    Date of Patent: February 14, 1984
    Assignee: Spraying Systems Co.
    Inventors: Andrew M. Wohlert, Frederick A. Miller, Verne E. Dietrich
  • Pulse generator
    Patent number: 4140932
    Abstract: An axially polarized bar magnet is slidably disposed in a non-conductive, non-magnetic tube on which two serially connected oppositely wound induction coils are disposed, the coils being spaced apart by a distance less than the effective length of the magnet.
    Type: Grant
    Filed: November 10, 1976
    Date of Patent: February 20, 1979
    Assignee: Riverbank Laboratories
    Inventor: Andrew M. Wohlert
  • Illuminated fishing lure
    Patent number: 4114305
    Abstract: One or more LEDs are connected across an induction coil wound on a tube slidably carrying an axially polarized permanent magnet, the tube being closed at both ends so that axial reciprocation of the tube causes the magnet to move back and forth through the coil and energize the LEDs.
    Type: Grant
    Filed: November 10, 1976
    Date of Patent: September 19, 1978
    Assignee: Riverbank Laboratories, Inc.
    Inventors: Andrew M. Wohlert, James Haruch
  • Carbon paper recycling system
    Patent number: 4045243
    Abstract: The carbon-wax coating is removed from carbon paper by sequentially immersing the coated paper in hot aqueous baths, the paper being squeeze-dried prior to immersion in each bath after the first. Ultrasonic vibrations are applied to the first bath to mutually separate the individual pieces of the paper.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: August 30, 1977
    Assignee: Riverbank Laboratories, Inc.
    Inventor: Andrew M. Wohlert
  • Tuning fork
    Patent number: D258594
    Type: Grant
    Filed: January 22, 1979
    Date of Patent: March 17, 1981
    Assignee: Knab, Inc.
    Inventor: Andrew M. Wohlert