Patents by Inventor John S. Adamson

John S. Adamson 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: 4203090
    Abstract: A "red-alert" end condition digital signal is generated by a transponder system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including an oscillator/ripple counter controlling a coded analog multiplexer network in circuit with a RTL compatible gate/driver circuit. The aforementioned system both is initiated by and is in power dependent relationship with a MARK-SPACE interrogation signal and has special utility in digitally monitoring product "overflow" conditions in source/product storage tank networks associated with an oil refinery and/or a chemical complex.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: May 13, 1980
    Assignee: Chevron Research Company
    Inventor: John S. Adamson
  • Patent number: 4194177
    Abstract: The liquid level within a storage tank network is continuously monitored by a transducer system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including a differential pressure (dp) cell in circuit with a digital volt meter (DVM) which, in turn, is connected to a series of look-up ROM's (Read-Only Memories). In operation and as a function of dp cell output level, DVM is continuously applying BCD signals to the ROM's, such signals being proportional to liquid level. The ROM's retain, in memory, the Gray code translations of the BCD input. The ROM's are then periodically accessed via an analog multiplexer controlled by an oscillator/ripple counter to provide corresponding microcircuit level signals at the output of a 7-segment decoder/driver. Thereafter, the microcircuit signals are regenerated--at levels compatible with conventional MARK-SPACE tank gauging systems--using an isolation/driver network in circuit with the 7-segment decoder/driver.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: March 18, 1980
    Assignee: Chevron Research Company
    Inventor: John S. Adamson
  • Patent number: 4171520
    Abstract: A "red-alert" end condition digital signal is generated by a transponder system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including an oscillator/ripple counter controlling a fixed Gray code logic encoding network in circuit with a driver circuit. The aforementioned system both is initiated by and is in power dependent relationship with a MARK-SPACE interrogation signal and has special utility in digitally monitoring product "overflow" conditions in source/product storage tank networks associated with an oil refinery and/or a chemical complex.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: October 16, 1979
    Assignee: Chevron Research Company
    Inventor: John S. Adamson
  • Patent number: 4160239
    Abstract: A "red-alert" end condition digital signal is generated by a transponder system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including an oscillator/ripple counter controlling a fixed Gray code logic encoding network in circuit with a programmed 7-segment decoder/driver. The aforementioned system both is initiated by and is in power dependent relationship with a MARK-SPACE interrogation signal and has special utility in digitally monitoring product "overflow" conditions in source/product storage tank networks associated with an oil refinery and/or chemical complex.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: July 3, 1979
    Assignee: Chevron Research Company
    Inventor: John S. Adamson
  • Patent number: RE31089
    Abstract: The liquid level within a storage tank network is continuously monitored by a transducer system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including a differential pressure (dp) cell in circuit with a digital volt meter (DVM) which, in turn, is connected to a series of look-up ROM's (Read-Only Memories). In operation and as a function of dp cell output level, DVM is continuously applying BCD signals to the ROM's, such signals being proportional to liquid level. The ROM's retain, in memory, the Gray code translations of the BCD input. The ROM's are then periodically accessed via an analog multiplexer controlled by an oscillator/ripple counter to provide corresponding microcircuit level signals at the output of a 7-segment decoder/driver. Thereafter, the microcircuit signals are regenerated--at levels compatible with conventional MARK-SPACE tank gauging systems--using an isolation/driver network in circuit with the 7-segment decoder/driver.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: November 23, 1982
    Assignee: Chevron Research Company
    Inventor: John S. Adamson