Patents by Inventor Malcolm G. Palmer

Malcolm G. Palmer 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).

  • Demolition device and method of preparing same
    Patent number: 4635554
    Abstract: An underwater demolition device has magnets for holding the device on a ferrous structure and a plunger which, once the device has been planted, is held in a retracted position by the structure on which the device is held. If the device is moved from the structure, the plunger protrudes beyond the magnets. A visual indication is provided immediately upon arming of the device if the plunger is then in its protruding position and a timer is provided to prevent detonation until a predetermined delay has elapsed from arming.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: January 13, 1987
    Assignee: Compact Energy Limited
    Inventor: Malcolm G. Palmer
  • Signalling device
    Patent number: 4633969
    Abstract: A device for under-water signalling has a chamber (38) which is normally closed by a replaceable element (39). A cartridge (16) in the device can be fired to release gas into the chamber and rupture the element (39), thus causing a sound wave to travel through the water and releasing the contents of the chamber into the water. When an end cap (13) has been removed to prepare the device for use, water pressure can act on a piston (23) to cause firing of the cartridge.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: January 6, 1987
    Inventor: Malcolm G. Palmer