Patents by Inventor Allan Wulff

Allan Wulff 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: 4047375
    Abstract: A highly accurate timer for timing out intervals in the order of seconds or minutes in length is disclosed. The timer comprises actuator means and digital means responsive to the actuator means for providing control signals. Coupling means provides the timer with an a.c. signal having a first characteristic periodic frequency. A clock is responsive to the coupling means to produce a series of pulses having a second characteristic frequency related to the first characteristic frequency. A counter is adapted for receiving a selectable value and is responsive to the control signals from the digital means to count pulses from the clock and produce an output when a selected value entered into the counter has been counted out. Programming means is utilized to enter a desired digital value into the counter. A switch switches a.c. power to and from external units as a function of the condition of the counter.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: September 13, 1977
    Inventor: Allan Wulff