Patents by Inventor Edgar Lumme

Edgar Lumme 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).

  • Locking arrangement with burglar alarm
    Patent number: 4029919
    Abstract: A cylinder lock is provided with a contact carrier for the movable contact of a switch in an electrically operated burglar alarm. A spring mounted on the contact carrier and radially projecting from the casing of the lock is stressed by engagement with the wall of the door aperture receiving the lock and biases the contact carrier toward a switch opening position. When it is attempted to pull the lock from the door, the spring pivots the contact carrier and the alarm is energized.
    Type: Grant
    Filed: January 21, 1976
    Date of Patent: June 14, 1977
    Assignee: Aug. Winkhaus
    Inventor: Edgar Lumme