Patents by Inventor John C. Dock

John C. Dock 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: 4947092
    Abstract: A wiper controller, responsive to any of a plurality of wash and wipe conditions, causes a short circuit protection circuit to inhibit control if the wiper motor becomes shorted. Hysteresis is employed for comparator operation of an intermittent wipe circuit that enables suitable short circuit protection.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: August 7, 1990
    Assignee: Chrysler Corporation
    Inventors: Ali M. Nabha, John C. Dock
  • Patent number: 4312214
    Abstract: A knock detector for an internal combustion engine comprises a resonantly tuned knock sensor mounted on the engine, a variable gain amplifier for amplifying the signal from the knock sensor, knock and reference channels which are operatively coupled with the output of the variable gain amplifier to develop respective knock and reference channel signals, and a comparator for comparing the signal of one channel against the signal of the other channel. The gain of the variable gain amplifier, in general, is an inverse function of engine speed. The amplified signal from the variable gain amplifier is gated to a peak detector of the reference channel circuit during absence of any appreciable engine knock to develop a reference signal representing background noise. The knock channel detects peaks of the amplifier output signal, and the comparator compares the two peak detected signals to provide a knock signal when a predetermined relationship between the two is attained.
    Type: Grant
    Filed: June 17, 1980
    Date of Patent: January 26, 1982
    Assignee: Chrysler Corporation
    Inventors: Dennis M. Kramer, John C. Dock