Patents by Inventor Leon Sidney Siegel

Leon Sidney Siegel 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).

  • Fail-safe circuit
    Patent number: 4025798
    Abstract: An electric system normally responsive to radiation over a path traversed by a body of material. An auxiliary radiation source generates a continuous signal through the portion of the circuit monitored for failure. The continuous signal opposes deenergization of the system relay during the period the material blocks normal radiation to the system and while the monitored circuit is operative.
    Type: Grant
    Filed: October 3, 1975
    Date of Patent: May 24, 1977
    Assignee: Combustion Engineering, Inc.
    Inventor: Leon Sidney Siegel
  • Voltage pulse multiplying circuit
    Patent number: 3991303
    Abstract: A flow meter in the form of a turbine meter with a pick-up producing voltage signals related to fluid flow through the meter is connected to an electric circuit. The circuit includes a clock oscillator which is started and stopped to produce trains of voltage pulses upon demand by the flow meter signals. The predetermined number of train pulses are matched with the register of fluid quantity so a whole number of the train pulses will equal the smallest quantity unit of the register.
    Type: Grant
    Filed: August 16, 1974
    Date of Patent: November 9, 1976
    Assignee: Combustion Engineering, Inc.
    Inventor: Leon Sidney Siegel