Patents by Inventor Emil R. Plasko

Emil R. Plasko 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: 6084501
    Abstract: A self-contained unitary thermal cutoff switch assembly having a hollow sealed switch housing formed by a collector and a lid that serve as the switch contacts. Separating the collector and the lid is a plastic insulating liner that generally follows the inside contour of the collector. The lid is held in place at the open end of the collector by folding over the top lip of the collector which will, at the same time, fold over the insulator in a U-shape about the edge of the lid and hold and insulate the lid in a spaced relationship with the collector. A shape memory collector formed as a straight piece of wire is located between the lid and the side of the collector opposite the lid. The wire is held in alignment by an opening through the insulator which supports an end portion of the wire adjacent to the bottom of the collector.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: July 4, 2000
    Assignee: Therm-O-Disc Incorporated
    Inventor: Emil R. Plasko
  • Patent number: 5128516
    Abstract: A heating element control includes a ceramic substrate having a resistance circuit thereon of a material having a positive temperature coefficient. A first comparator compares the resistance of the circuit with a first known resistance to control a signal light. A second comparator compares the resistance of the circuit with a second known resistance to control a heating element.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: July 7, 1992
    Assignee: Therm-O-Disc, Incorporated
    Inventors: Emil R. Plasko, James A. Tennant
  • Patent number: 5015987
    Abstract: Wires and a thermistor are isolated from the interior surface of a metal tube by a ceramic tube and a ceramic spacer to protect the thermistor and prevent breakdown of insulation on the wires.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: May 14, 1991
    Assignee: Therm-O-Disc, Incorporated
    Inventors: Ronald A. Nixon, Marc A. Peoples, Emil R. Plasko
  • Patent number: 4821010
    Abstract: A thermal cutoff includes a housing having a resistive coating bonded thereto, and defining a heater for heating the thermal cutoff to its firing temperature.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: April 11, 1989
    Assignee: Therm-O-Disc, Incorporated
    Inventor: Emil R. Plasko
  • Patent number: 4342982
    Abstract: A thermally actuatable electrical switch construction having a housing carrying an electrically insulating end plug provided with an opening passing therethrough and in which a portion of a conductive lead is disposed so that opposite ends of the lead extend beyond opposed ends of the plug and respectively define a fixed contact inside the housing and a terminal outside the housing, the portion of the lead being retained in the opening by a sealing compound disposed in the opening and extending around the portion of the lead and interlocking therewith to tend to prevent axial movement of the lead into the housing as well as to tend to prevent rotational movement of the lead relative to the end plug. The portion of the lead has a series of at least two convolutions that interlock with the sealing compound in the opening of the end plug. The two convolutions respectively have apexes that respectively engage the internal surface of the end plug substantially on opposite sides thereof.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: August 3, 1982
    Assignee: Emerson Electric Co.
    Inventor: Emil R. Plasko
  • Patent number: 4314224
    Abstract: A thermally actuatable electrical switch construction having a resilient contact member normally biased into electrical contact with a stationary contact member while a temperature sensitive member of the construction is in a solid condition and normally tending to spring out of contact with the stationary contact member by the natural bias of the resilient contact member when the temperature sensitive member is rendered non-solid by sensing a temperature above a predetermined temperature. The construction carries a guide member operatively associated with the resilient contact member to provide a guide for the resilient contact member that will substantially insure that the resilient contact member will move and be maintained out of contact with the stationary contact member after the temperature sensitive member has been rendered non-solid.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: February 2, 1982
    Assignee: Emerson Electric Company
    Inventor: Emil R. Plasko
  • Patent number: 4305202
    Abstract: A thermally actuatable electrical switch construction having a deformable contact member normally disposed in electrical contact with a stationary contact member while a temperature sensitive member of the construction is in a solid condition and being deformed out of contact with the stationary contact member by deforming means of the construction when the temperature sensitive member is rendered non-solid by sensing a temperature above a predetermined temperature, the deformable contact member being deformed in a direction toward the temperature sensitive member by the deforming means when the temperature sensitive member is rendered non-solid and being carried by a lead that projects into the switch construction whereby the lead and the deformable contact member define a subassembly that is adapted to be initially inserted into the construction to be secured thereto.
    Type: Grant
    Filed: July 16, 1980
    Date of Patent: December 15, 1981
    Assignee: Emerson Electric Co.
    Inventor: Emil R. Plasko
  • Patent number: 4197634
    Abstract: A thermally actuatable electrical switch construction having a deformable contact member normally disposed in electrical contact with a stationary contact member while a temperature sensitive member of the construction is in a solid condition and being deformed out of contact with the stationary contact member by deforming means of the construction when the temperature sensitive member is rendered non-solid by sensing a temperature above a predetermined temperature, the deformable contact member being deformed in a direction toward the temperature sensitive member by the deforming means when the temperature sensitive member is rendered non-solid and being carried by a lead that projects into the switch construction whereby the lead and the deformable contact member define a subassembly that is adapted to be initially inserted into the construction to be secured thereto.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: April 15, 1980
    Assignee: Emerson Electric Co.
    Inventor: Emil R. Plasko