Patents by Inventor Edward A. Day

Edward A. Day 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).

  • Patent number: 4348958
    Abstract: An explosive projectile comprising a body having a flight end and defining an internal chamber having a main high explosive charge therein. The body has at least one passage therein which communicates with the internal chamber and intersects the exterior surface of the flight end. a detonation initiator material is disposed within the passageway and enables safe handling and high velocity projection of the projectile without ignition but is capable of detonation to effect detonation of the main explosive charge upon predetermined high velocity impact of the flight end with a target surface. A thin cover is preferably provided over the exposed end of the initiator passage. The detonator initiator material typically reaches high order detonation within a distance of one to one and one-half diameters from the impact end. The impact velocity on a metal target must, typically, be 0.5 kilometers per second or greater to effect detonation.
    Type: Grant
    Filed: May 15, 1980
    Date of Patent: September 14, 1982
    Assignee: Systems, Science and Software
    Inventor: Edward A. Day
  • Patent number: 4312271
    Abstract: A reliable delay detonator device is disclosed which is thermally and chemically stable and which is also insensitive to mechanical shock and electrostatic charge. The device can be made with differing time delays and can be interconnected with other detonator devices for achieving multiple delay characteristics. A modification of the device is particularly suited to high temperature use. None of the devices contain any primary explosives, the device relying upon pyrotechnic delay materials and secondary explosives.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: January 26, 1982
    Assignee: Systems, Science and Software
    Inventors: Edward A. Day, Glenn E. Seay, Petry B. Ritter
  • Patent number: 4239004
    Abstract: A reliable delay detonator device is disclosed which is thermally and chemically stable and which is also insensitive to mechanical shock and electrostatic charge. The device can be made with differing time delays and can be interconnected with other detonator devices for achieving multiple delay characteristics. A modification of the device is particularly suited to high temperature use. None of the devices contain any primary explosives, the device relying upon pyrotechnic delay materials and secondary explosives.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: December 16, 1980
    Assignee: Systems, Science & Software
    Inventors: Edward A. Day, Glenn E. Seay, Perry B. Ritter
  • Patent number: 4144814
    Abstract: A reliable delay detonator device is disclosed which is thermally and chemically stable and which is also insensitive to mechanical shock and electrostatic charge. The device can be made with differing time delays and can be interconnected with other detonator devices for achieving multiple delay characteristics. A modification of the device is particularly suited to high temperature use. None of the devices contain any primary explosives, the device relying upon pyrotechnic delay materials and secondary explosives.
    Type: Grant
    Filed: July 8, 1976
    Date of Patent: March 20, 1979
    Assignee: Systems, Science and Software
    Inventors: Edward A. Day, Glenn E. Seay, Perry B. Ritter
  • Patent number: 4022508
    Abstract: Means for reducing the air drag on bluff vehicles are disclosed which facilitate improved fuel mileage and reduce induced air turbulence adjacent the vehicle. In one embodiment the air drag reducing means employs an airvane member secured in spaced relation to an air flow guide element in kit form for mounting adjacent a corner edge of the bluff surface to prevent separation of air flow from the corner edge and adjacent rearward surface of the vehicle and develop a net forward thrust on the air drag reducing means. Another embodiment includes an airvane member and means for mounting it adjacent a smooth curved windward corner edge of a bluff surface on the vehicle so as to define an air flow passage through which air passes from the bluff surface in attached relation to the corner edge and adjacent rearwardly extending surface of the vehicle.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: May 10, 1977
    Assignee: Systems, Science and Software
    Inventors: Jeffrey W. Kirsch, Edward A. Day