Patents by Inventor Richard H. Hulett

Richard H. Hulett 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).

  • Elongate electrical assemblies
    Patent number: 4791276
    Abstract: Elongate electrical devices, comprising two conductors with electrical elements connected in parallel between them, have improved performance if the power supply is connected to one conductor at the near end and to the other conductor at the far end. Particularly useful devices are heaters, e.g. PTC conductive polymer heaters. The power supply is connected to the far end of the device through a connection means whose electrical properties can be correlated with those of the device in order to obtain a wide range of useful results. For example the connection means can have PTC, NTC or ZTC character and can be a simple conductor or another elongate device. The power supply can be DC or single-phase, two-phase or three-phase AC.
    Type: Grant
    Filed: November 5, 1986
    Date of Patent: December 13, 1988
    Assignee: Raychem Corporation
    Inventors: John A. Midgley, Richard H. Hulett
  • Elongate electrical assemblies
    Patent number: 4659913
    Abstract: Elongate electrical devices, comprising two conductors with electrical elements connected in parallel between them, have improved performance if the power supply is connected to one conductor at the near end and to the other conductor at the far end. Particularly useful devices are heaters, e.g. PTC conductive polymer heaters. The power supply is connected to the far end of the device through a connection means whose electrical properties can be correlated with those of the device in order to obtain a wide range of useful results. For example the connection means can have PTC, NTC or ZTC character and can be a simple conductor or another elongate device. The power supply can be DC or single-phase, two-phase or three-phase AC.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: April 21, 1987
    Assignee: Raychem Corporation
    Inventors: John A. Midgley, Richard H. Hulett
  • Elongate electrical assemblies
    Patent number: 4582983
    Abstract: Elongate electrical devices, comprising two conductors with electrical elements connected in parallel between them, have improved performance if the power supply is connected to one conductor at the near end and to the other conductor at the far end. Particularly useful devices are heaters, e.g. PTC conductive polymer heaters. The power supply is connected to the far end of the device through a connection means whose electrical properties can be correlated with those of the device in order to obtain a wide range of useful results. For example the connection means can have PTC, NTC or ZTC character and can be a simple conductor or another elongate device. The power supply can be DC or single-phase, two-phase or three-phase AC.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: April 15, 1986
    Assignee: Raychem Corporation
    Inventors: John A. Midgley, Richard H. Hulett
  • Elongate electrical assemblies
    Patent number: 4574188
    Abstract: Elongate electrical devices, comprising two conductors with electrical elements connected in parallel between them, have improved performance if the power supply is connected to one conductor at the near end and to the other conductor at the far end. Particularly useful devices are heaters, e.g. PTC conductive polymer heaters. The power supply is connected to the far end of the device through a connection means whose electrical properties can be correlated with those of the device in order to obtain a wide range of useful results. For example the connection means can have PTC, NTC or ZTC character and can be a simple conductor or another elongate device. The power supply can be DC or single-phase, two-phase or three-phase AC.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: March 4, 1986
    Assignee: Raychem Corporation
    Inventors: John A. Midgley, Richard H. Hulett