Patents by Inventor Edward A. Leffingwell

Edward A. Leffingwell 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).

  • Method for fabricating a rechargeable electrical cell pack having over-current protection
    Patent number: 4315364
    Abstract: A rechargeable electrochemical cell pack is provided having a casing holding a plurality of electrically interconnected cells and having circuit breaking means to guard against the possibility of excessive supply and consumption of electrical power and the risk of damage or injury incident thereto. The circuit breaker comprises a small current fuse contained internally of the cell pack so as to give an external visible indication of its state and is removably mounted on an access door for replacement purposes.
    Type: Grant
    Filed: March 5, 1980
    Date of Patent: February 16, 1982
    Assignee: General Electric Company
    Inventor: Edward A. Leffingwell
  • Plug-in rechargeable battery and socket therefor
    Patent number: 4247603
    Abstract: A rechargeable plug-in battery compatible with printed circuits and the like. At least one rechargeable storage cell is mounted inside a battery case having at least two terminal pins which extend through the battery case for insertion to a mating socket. Inside the casing, the pins are welded directly to the battery terminals, and recesses formed in the base and cover portions of the battery case at the interior receive the storage cell, or cells, so as to restrain them against movement.
    Type: Grant
    Filed: January 17, 1979
    Date of Patent: January 27, 1981
    Assignee: General Electric Company
    Inventors: Edward A. Leffingwell, Billy E. Stillwell
  • Rechargeable electrochemical cell pack having overcurrent protection
    Patent number: 4217400
    Abstract: A rechargeable electrochemical cell pack is provided having a casing holding a plurality of electrically interconnected cells and having circuit breaking means to guard against the possibility of excessive supply and consumption of electrical power and the risk of damage or injury incident thereto. The circuit breaker comprises a small current fuse contained internally of the cell pack so as to give an external visible indication of its state and is removably mounted on an access door for replacement purposes.
    Type: Grant
    Filed: August 3, 1978
    Date of Patent: August 12, 1980
    Assignee: General Electric Company
    Inventor: Edward A. Leffingwell
  • Rechargeable battery with separate charging terminal
    Patent number: 4147838
    Abstract: A separate charging terminal on a rechargeable battery permits the battery to be recharged in an appliance fitted with a cooperating contact. In this manner only a rechargeable battery may be electrically coupled to the charging circuit of the appliance.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: April 3, 1979
    Assignee: General Electric Company
    Inventor: Edward A. Leffingwell