Patents by Inventor John Henry Gavin

John Henry Gavin 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).

  • Hand tool for inserting electrical contacts
    Patent number: 4077117
    Abstract: Apparatus for severing electrical contacts from a carrier strip and loading the severed contacts into a hand tool which can then be used to insert the contacts individually into an apertured circuit element such as a printed circuit board.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: March 7, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John Henry Gavin
  • Application machine for mounting circuit board pins with an improved control system
    Patent number: 4058881
    Abstract: An application machine for staking contacts, e.g. circuit board pins, in a hole in a circuit board including an extendable staking anvil mounted on a toggle linkage. The staking anvil is provided with a bore and a fluidic sensor in communication with the bore to detect the presence of a clear circuit board hole for insertion of a contact in the hole. In the event no hole is present, or a contact has already been staked in the hole, a control system responsive to the fluidic sensor retracts the extendable anvil and prevents staking a terminal pin in the circuit board where no hole is present, or where a pin has already been staked in the hole.
    Type: Grant
    Filed: January 21, 1976
    Date of Patent: November 22, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John Henry Gavin, John Martin Spickler