Patents by Inventor Clair B. Alexander

Clair B. Alexander 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).

  • Proximity switch for fluid cylinders
    Patent number: 4071725
    Abstract: The specification discloses a magnetic proximity sensing apparatus especially adapted for use with fluid cylinders having pistons formed from magnetically attractable material. The apparatus includes clamping means for securing it to a tie rod of a fluid cylinder or directly to the cylinder body in juxtaposition to a side of the cylinder without disassembly of the cylinder. Also included are magnetic actuator means responsive to the proximity of the fluid cylinder piston which close a switch and enable electrical circuitry for controlling fluid valves or other apparatus.
    Type: Grant
    Filed: February 27, 1976
    Date of Patent: January 31, 1978
    Assignee: Ibec Industries, Inc.
    Inventors: John L. Smith, Clair B. Alexander