Patents by Inventor Andre R. J. Lefranc

Andre R. J. Lefranc 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 fuse for an artillery projectile of the type having reduced aerodynamic resistance of the base
    Patent number: 4726291
    Abstract: A proximity fuse for an artillery projectile of the type having reduced aerodynamic resistance of the base. The fuse comprises a radar arrangement (1,2,3,4) which supplies a beat signal (S.sub.e) to a first chain for activating the trigger device (9) at the end of a time t.sub.1 after S.sub.e has exceeded a given threshold. The fuse also comprises a supplementary chain for counteracting the effect of air resistance, which presents characteristics of cut off (32), of amplification (33) and of exceeding a threshold (35,36) comparable with those of the first chain, of which the output signal is transmitted to inhibition means (47,48,49,41,39 and 44, 38 and 43) and which comprises first and second delaying means (34).
    Type: Grant
    Filed: May 28, 1986
    Date of Patent: February 23, 1988
    Assignee: U.S. Philips Corporation
    Inventor: Andre R. J. Lefranc