Patents by Inventor Howard S. Hoopes

Howard S. Hoopes 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).

  • Remotely calibratable instrument system
    Patent number: 4849754
    Abstract: A two-wire, admittance-responsive instrument system in which a transmitter, receiver and calibrator are connected by a two-wire transmission line is disclosed. The calibrator repetitively transmits a calibration enabling signal causing the transmitter to increment a reference admittance for comparison to a sensed admittance corresponding to a known physical condition. The calibrator monitors the bistable output signals transmitted by the transmitter in the calibration mode, which changes state when the incremented reference admittance bears a predetermined relationship to the sensed admittance. The calibrator may then transmit additional calibration enabling signals causing preload to be established for transmitter operation.
    Type: Grant
    Filed: February 2, 1988
    Date of Patent: July 18, 1989
    Assignee: Drexelbrook Controls
    Inventors: Frederick L. Maltby, Richard G. Hall, Jonathan L. Kramer, Howard S. Hoopes, Steven R. Petersen
  • Remotely calibratable instrument system
    Patent number: 4723122
    Abstract: A two-wire, admittance-responsive instrument system in which a transmitter, receiver and calibrator are connected by a two-wire transmission line is disclosed. The calibrator repetitively transmits a calibration enabling signal causing the transmitter to increment a reference admittance for comparison to a sensed admittance corresponding to a known physical condition. The calibrator monitors the bistable output signals transmitted by the transmitter in the calibration mode, which changes state when the incremented reference admittance bears a predetermined relationship to the sensed admittance. The calibrator may then transmit additional calibration enabling signals causing preload to be established for transmitter operation.
    Type: Grant
    Filed: October 25, 1985
    Date of Patent: February 2, 1988
    Assignee: Drexelbrook Controls, Inc.
    Inventors: Frederick Maltby, Richard G. Hall, Jonathan L. Kramer, Howard S. Hoopes, Steven R. Petersen
  • Power failure early warning circuit for microprocessor with CMOS RAM memory
    Patent number: 4375663
    Abstract: A circuit for preventing data transfers to a RAM by a microprocessor when primary ac power fails also puts the RAM in standby after a period adequate to complete any data transfer started. The sequence is provided by providing a first signal to the microprocessor transfer enable line upon loss of primary power. A second signal is provided for the enable line of the RAM after a predetermined delay but before decay of the dc power to the RAM.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: March 1, 1983
    Assignee: Leeds & Northrup Company
    Inventors: Samuel A. Arcara, Howard S. Hoopes
  • Digital signal linearizer
    Patent number: 3939459
    Abstract: A digital signal linearizer for obtaining a linear digital output from a non-linear input. The output voltage of a thermocouple is converted to a train of pulses by a dual slope analog to digital converter. The number of pulses in the pulse train is proportional to the voltage and is linearized by a pulse rate multiplier programmed to vary over successive ranges of pulse counts corresponding to linear segments approximating the non-linear characteristic relating temperature and voltage. The linearized pulse train out of the multiplier is counted and displayed directly in temperature units.
    Type: Grant
    Filed: January 9, 1974
    Date of Patent: February 17, 1976
    Assignee: Leeds & Northrup Company
    Inventor: Howard S. Hoopes