Abstract: A weapon barrel includes a hard chromium layer provided on an inner barrel surface. The hard chromium layer contains at least 500 fissures/cm in a cross-sectional plane.
Type:
Grant
Filed:
March 13, 2002
Date of Patent:
March 9, 2004
Assignee:
Rheinmetall W & M GmbH
Inventors:
Gert Schlenkert, Hartmut Wagner, Horst Reckeweg
Abstract: A trigger safety for a pistol includes a laterally slidable plug incorporated into the trigger that, when slid laterally to extend beyond the confines of the trigger, will prevent rearward movement of the trigger by the plug's interference with the pistol frame. A spring internal to the trigger, imparts a force on plug to retain it positioned in either the safety position or the fire position and resist movement. The plug can be reversed for left-handed users so that the pistol can be placed in a “safe” or a “fire” position with the trigger finger of either hand.
Type:
Grant
Filed:
April 26, 1999
Date of Patent:
May 1, 2001
Inventors:
Edward P. Schmitter, Zdenek Prisovsky, Gary A. Sniezak, Frank A. Spaniel
Abstract: A system (30) for determining a missile kinematic property. The inventive system includes a radar system (36) for obtaining radar range measurements (34). An inertial reference unit (40) tracks changes in missile acceleration without the use of the radar range measurements and provides a signal (38, 42) in response thereto. An altitude Kalman filter (32) and a subtractor circuit (48) are used to combine the signal (38, 42) and the radar range measurements (34) to provide an accurate estimate (50) of the property. In a specific embodiment, the kinematic property includes missile vertical velocity and missile altitude. A radar system (36) supplies radar range information (34) to the Kalman filter (32). A loop (52) from the Kalman filter (32) to the radar system (36) facilitates estimating the radar range measurements (34) when invalid radar range measurements are provided by the radar system (36).
Type:
Grant
Filed:
December 3, 1997
Date of Patent:
July 4, 2000
Assignee:
Raytheon Company
Inventors:
Robert D. Windhorst, Stephen V. Sosinski