Abstract: A single shot rifle having a cam operated, falling breechblock firing mechanism. The firing mechanism includes a breechblock vertically movable within a housing member, and a laterally movable hammer operable to strike a cartridge. The firing mechanism further includes a pivotal breechblock link, connected to a manually operable lever, to effect vertical movement of the breechblock. Additionally, the lever is pivotal about a rotary cam member featuring three cam riding surfaces to operate an ejector mechanism for extracting spent casings from a breech, and to allow manual insertion of a fresh cartridge into the breech.

Abstract: An improved adapter is provided for joining an optical scope, such as a borescope, endoscope or the like, to a film or video camera. The adapter includes a multi-element relay lens assembly which directs real images viewed by the attached optical scope to the camera for filming. The multi-element relay lens assembly is longitudinally positionable within the adapter to provide a focusing control. A filter slot is further included within the adapter to allow for the insertion of an optical filter between the borescope and the camera without uncoupling either attachment from the adapter. In order to achieve improved image resolution at the camera aperture of images detected by the borescope, a scope's eyepiece optics and the camera lens are removed prior to coupling the borescope and the camera to the adapter.

Abstract: The invention provides a system with no moving parts for autocorrelating optical radiation signals. An incident optical radiation signal is first divided into first and second optical beams which, in the preferred embodiment, are directed respectively through first and second electro-optic crystals to produce a relative time adjustment between the optical beams. The optical beams are then combined and a product value is determined. Using the technique of autocorrelation, the product of the optical beams is measured over a range of time adjustments between the optical beams to provide a measurement of the incident optical radiation signal. The system and method described provide a vibration-free technique for autocorrelation which can be incorporated into laser resonator structures.

Abstract: An attachment for a fork lift truck for opening and closing sliding doors such as railway freight car doors. The attachment includes a floor that can be engaged by the tines of the fork lift and two vertically spaced apart door engaging members mounted to the floor for transverse movement with respect thereto. The floor also mounts an upstanding cage assembly so that a person can work inside a protected area.

Abstract: A yarn winding apparatus with a rotatably driven barrel cam having a groove in its cylindrical surface and a slide member and traverse guide assembly engaging the groove constrained for reciprocating linear movement, as the cam rotates, is provided with a constant tension yarn laydown at the reversals by incorporating a resilient lever between the guide and the slide head capable of being flexed at the cam reversals within a predetermined critical range of from about 2.5.degree. to about 6.5.degree. with respect to a plane perpendicular to the linear movement of the guide assembly when the slide head moves in a horizontal path.