Patents by Inventor Walter Sinclair

Walter Sinclair 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).

  • Battery heating system
    Patent number: 4222000
    Abstract: A battery heating system comprises a number of storage batteries and an alternator driven by a variable speed prime mover connected to supply AC heating current to the batteries. The system is arranged so that the AC current is substantially constant over the working speed range of the prime mover.
    Type: Grant
    Filed: July 6, 1978
    Date of Patent: September 9, 1980
    Assignee: Lucas Industries Limited
    Inventors: Cyril Silvertown, Walter Sinclair
  • Circuits for heating storage batteries
    Patent number: 4171508
    Abstract: A battery heating circuit comprising a transformer having a primary winding for connection to an a.c. supply and a secondary winding, and at least two pairs of batteries. The two batteries of each pair are connected in series and the series combinations of the pairs of batteries are connected in parallel between d.c. terminals. The secondary winding is connected between the common terminals of each pair of batteries.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: October 16, 1979
    Assignee: Lucas Industries Limited
    Inventor: Walter Sinclair