Patents by Inventor Alfred William Barber

Alfred William Barber 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).

  • Regulated power supply with combined series and shunt regulating transistors
    Patent number: 4075546
    Abstract: Unipolar regulated power supplies can be provided with two way control of output voltage by a transistor of polarity opposite to that of the pass transistor connected in shunt with the load and driven from the same error amplifier as the one which drives the pass transistor.
    Type: Grant
    Filed: August 18, 1976
    Date of Patent: February 21, 1978
    Inventor: Alfred William Barber
  • Timing circuit for incremental actuators
    Patent number: 4061951
    Abstract: A transistor circuit including a capacitor charging circuit and an actuator such as an electric motor provides a two part cyclic timing circuit, one part being one complete revolution of the motor and the other part being the charging time of the capacitor. The entire device is designed to run for an extended period on two dry cells. Practically no current is drawn while the motor is at rest contributing to a long battery life.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: December 6, 1977
    Inventor: Alfred William Barber