Patents by Inventor Patrick E. Ciriacks

Patrick E. Ciriacks 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: 4417211
    Abstract: A first pulse train is generated by a phase-locked loop circuit of which the frequency is adjustable to correspond to engine speeds of between 10 and 9,990 rpm. The pulse train is again divided to furnish a second pulse train for use in firing the timing light. A photoelectric sensor is responsive to flashes from the timing light. A D type flip-flop is coupled to the second pulse train and to the photoelectric sensor and generates an enable signal commencing with a pulse in the second pulse train and terminating with the sensor signal. A counter receives the first pulse train and is operative to count the pulses therein during the presence of the enable signal. A display depicts a number representative of the number of pulses counted by the counter.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: November 22, 1983
    Assignee: Snap-on Tools Corporation
    Inventors: Patrick E. Ciriacks, Gary S. Gibson