Firing mode selection apparatus
OwnerMark Laytoninventor
Life of this patent
Estimating the term…
Abstract
A firing mode selector apparatus enables a rifle to be selected into one of four different modes in a logical sequence from safe to semi-automatic to burst to full automatic or vice versa. The selector lever of the rifle is configured to receive a modified sear leg which is oriented substantially diagonally and is biased against the selector sear cam. The selector lever contains cam depressions which are cut from the selector lever at a tangential angle to receive the sear leg and which take much less material from the selector lever than prior art devices.
Claims16
Mode selection apparatus for use in a firearm firing mechanism comprising:
- a sear;
- a sear leg attached to the sear and rotatably attached to the firearm, the sear leg including a forward edge;
- means for biasing the sear and sear leg in a position wherein they are tilted toward the front of the firearm;
- a selector lever cam against which the forward edge of the sear leg abuts;
- and a cam depression;
- characterized in that the cam depression is disposed at a tangential angle of between 20 and 80 degrees in and to the selector lever cam, the cam depression being positioned to selectively receive the forward edge of the sear leg such that four modes of firing the firearm are arranged to be selected in a logical sequence from safe to semi-automatic to burst to full automatic or from safe to full automatic to burst to semi-automatic.
Selection mode apparatus for selecting from four modes of fire of a gun, the modes being arranged to be selected in a logical sequence from safe to semi-automatic to burst to full automatic or from safe to full automatic to burst to semi-automatic, comprising:
- a selector lever extending through and approximately perpendicular to an exterior wall of the gun, at least a portion of the selector lever being cylindrical and also being adapted for rotational movement to select the firing mode;
- a plurality of disconnector cams disposed on the selector lever for selective depression of disconnectors;
- a sear cam disposed on the selector lever, at least a portion of the sear cam being cylindrical;
- a first cam depression cut tangentially angularly into the sear cam;
- a second cam depression cut tangentially angularly into the sear cam and perpendicularly from and adjacent to the first cam depression;
- a sear;
- a sear leg secured to the sear, adapted for pivotal movement, and biased against the sear cam such that it selectively enters the first and second cam depressions in burst and full automatic modes as the selector lever is rotated.
Firing selection mode apparatus for use in the firing mechanism of a gun to allow for sequential selection of firing modes in either ascending or descending order, comprising:
- a selector lever disposed in and between two walls of the gun, at least a portion of the selector lever being cylindrical;
- a sear cam section disposed on the selector lever;
- a first cam depression facet cut tangentially angularly between 20 and 80 degrees from the sear cam section;
- a second cam depression facet cut tangentially angularly between 20 and 80 degrees from the sear cam section and disposed adjacent the first cam depression facet;
- a disconnector cam section disposed on the selector lever, being positioned to act upon the firing mechanism for operation of the gun in the selected firing mode;
- a sear;
- a sear leg attached to the sear at an angle of between 30 and 90 degrees relative thereto and positioned for rotational movement relative to the gun;
- means for biasing the sear leg against the sear cam section;
- means for rotating the selector lever such that the sear leg selectively enters the first and second cam depression facets such that four modes of firing the gun are arranged to be selected in a logical sequence from safe to semi-automatic to burst to full automatic or from safe to full automatic to burst to semi-automatic.
Dependencies are inferred from the claim text.