Patents by Inventor C. Richard Meyer

C. Richard Meyer 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).

  • Output circuit for controlling a relay which has capability for operating with wide range of input voltages
    Patent number: 5410187
    Abstract: A relay output circuit is provided which enables a relay coil to be connected to a possibly variable input DC voltage without requiring relatively high power components to be used. The relay coil is provided with sufficient current to actuate it and then the actuating current is decreased to a lesser magnitude which is sufficient to maintain the relay in an actuated position. In order to accomplish this, the relay output circuit first provides current to the coil through a single resistor and then effectively connects an additional resistor in series with the initial resistor to decrease the current flowing through the coil. The second resistor is effectively added to the circuit by turning off a field effect transistor that provides a shorting across the second resistor when it is in a conductive state. The conductive state of the field effect transistor is controlled by a capacitor which charges for a preselected period of time following a change of state of an input circuit point.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: April 25, 1995
    Assignee: Honeywell, Inc.
    Inventor: C. Richard Meyer