Patents by Inventor Alan E. Eldridge

Alan E. Eldridge 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).

  • Self-contained burglar alarm device for sliding windows, doors and the like
    Patent number: 4896139
    Abstract: An elongated housing has first and second ends and an alarm responsive to an electrical signal. A switch is provided for controlling the electrical signal and includes contact elements for activating the alarm in each of two activation modes corresponding to compression and extension of the housing. A mechanism is disposed at the housing first end for adjusting the length of the housing. Finally, a mechanism is disposed proximate the housing second end for enabling movement of the contact elements to initiate the two activation modes from an inactive alarm mode in cooperation with the housing length adjustment mechanism.
    Type: Grant
    Filed: May 11, 1988
    Date of Patent: January 23, 1990
    Inventor: Alan E. Eldridge