Patents by Inventor Donald W. Maile

Donald W. Maile 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).

  • Infrared radiation controlled switch with a visible light detector
    Patent number: 4663521
    Abstract: An electric switch has an infrared radiation detector and a visible light detector. The switch is activated when both a change in the detected infrared radiation is sensed and the sensed visible light has a given relationship to a predetermined intensity level. An adjustment of the predetermined level is provided whereby the switch is activated when the level is set to the visible light intensity at the time the adjustment is made.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: May 5, 1987
    Assignee: RCA Corporation
    Inventor: Donald W. Maile
  • Electrical control having automatic mode selection
    Patent number: 4650986
    Abstract: A mode control circuit is particularly useful in controlling the operation of an passive infrared appliance switch. When power is first applied to the control, a first output signal is emitted which places the switch in one mode of operation. If the power is then removed and reapplied within a short time, the control emits a second output signal placing the switch in a second mode of operation. However, if the power is removed for a long enough time, the control will emit the first signal when the power is reapplied.
    Type: Grant
    Filed: July 26, 1985
    Date of Patent: March 17, 1987
    Assignee: RCA Corporation
    Inventor: Donald W. Maile
  • Infrared radiation bi-level electric control
    Patent number: 4647788
    Abstract: An electric switch for controlling a light has an infrared radiation detector. In response to a change in the radiation being sensed by the detector, the light is illuminated to a first brightness level. A manual switch is provided to turn on the light to a second brightness level.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: March 3, 1987
    Assignee: RCA Corporation
    Inventors: Donald W. Maile, Furman D. Kell
  • Electrical controller having a window discriminator
    Patent number: 4618770
    Abstract: An electrical control has a detector which senses the infrared radiation within a given area. A pair of comparators function as a window discriminator. A voltage divider provides reference bias potentials to the comparators. The same divider provides a bias to the signal input terminals of the comparators. These signal input terminals are coupled through a capacitor to the detector. The output of the comparators is used to actuate the control.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: October 21, 1986
    Assignee: RCA Corporation
    Inventor: Donald W. Maile
  • Variable input voltage regulator circuit
    Patent number: 4590546
    Abstract: A power supply provides a regulated DC voltage level for a wide range of AC supply levels. The power supply incorporates circuitry which forms a voltage doubler or a full wave rectifier in response to the level of the AC supply voltage. The transition between the type of rectification is rapid, so that the regulated voltage remains constant.
    Type: Grant
    Filed: February 23, 1984
    Date of Patent: May 20, 1986
    Assignee: RCA Corporation
    Inventor: Donald W. Maile