Sighting system with foldable front sight with aperture post

Abstract

The current system is a method for easily adjusting the front sight post on a firearm. The system is used to aid in easier front sight post adjustments as well as maintain a uniform sight picture throughout the aiming process. The system solves the current problem of viewing two separate sight pictures when looking through a rear sight. The system also solves the problem of needing a separate tool to adjust the sight post. The system includes four critical parts, a bottom sight post tower, a top sight post tower, a front sight post and a mechanism for providing constant upward force such as a spring. The system has multiple embodiments including the use of various sight posts.

We claim: 
     
         1 . A firearm sighting system comprising a front sight and a rear sight, the front sight further comprising
 a top tower structured to at least partially enclose a sight post, the sight post having a lower segment with threads, a middle segment with a flange, and an top segment, and   a lower tower having threaded opening for receiving the lower segment of the sight post and an attachment connection structured to attach to a gun bore,   wherein the top tower is structured and operable to be fixed relative to the lower tower in an x plane and a y plane and to have restricted movement in a z plane   wherein the restricted movement in the z plane of the top tower is restricted by the flange   wherein the sight post is coupled to the lower tower via the threads on the lower segment of the sight post mating to the threaded opening on the lower tower   wherein the top tower and lower tower are coupled to a base, the base having a shaft,
 wherein the top tower and lower tower are configured to fold about the shaft. 
   
     
     
         2 . The firearm sighting system of  claim 1 , wherein the front sight further comprises one or more springs structured and operable to apply an opposing force between the top tower and the lower tower in the z plane. 
     
     
         3 . The firearm sighting system of  claim 1 , wherein the top segment of the sight post comprises two holes both structured and operable for creating a line of sight with a rear sight. 
     
     
         4 . The firearm sighting system of  claim 1 , wherein the top tower is structured to at least partially enclose the sight post by means of two ears forming an enclosure of 180 degrees or more. 
     
     
         5 . The firearm sighting system of  claim 1 , wherein the lower tower has an extension configured to fit inside the top tower and is structured and operable to be fixed relative to the top tower relative to the lower tower in the x plane and the y plane. 
     
     
         6 . The firearm sighting system of claim Error! Reference source not found., wherein the one or more springs apply a force of greater than one quarter of a newton. 
     
     
         7 . A front sight device comprising
 an upper tower coupled to a lower tower the lower tower structured to receive a front sight post, the front sight post having a sight hole, the upper tower structured to receive the front sight post,   wherein the lower tower is coupled to a base via a shaft and wherein the lower tower is configured to fold about the shaft in a x plane.   
     
     
         8 . The front sight device of  claim 7 , wherein the upper tower has arms having a centroid and wherein the sight hole is located at the centroid. 
     
     
         9 . The front sight device of  claim 7 , wherein the coupling between the upper tower and lower tower has one or more springs configured to apply a force in a z plane to the upper tower relative to the lower tower, 
     
     
         10 . The front sight device of  claim 7 , wherein the front sight post has threads and is configured to adjust its position in the z plane relative to the lower tower by rotating the threads relative to the lower tower. 
     
     
         11 . The front sight device of  claim 7 , wherein the front sight post has two intersecting sight holes. 
     
     
         12 . The front sight device of  claim 7 , wherein the front sight post has a flange configured to be larger than the hole in the upper tower. 
     
     
         13 . A method of sighting a firearm, the method comprising,
 unfolding a front sight about an axis   displacing an upper tower of a front sight during a first displacement by applying a force from a person using the firearm, the person pressing the upper tower toward a lower tower of a front sight,
 the upper tower comprising a partial enclosure, and a cylindrical hole 
 the lower tower comprising an opening structured for receiving a threaded connection, and an attachment means for attaching to a gun barrel 
   rotating a sight post having an axis a preselected number of rotations corresponding to a preselected elevation of the sight post with respect to the lower tower, the sight post having
 a top segment, the top segment positioned within the partial enclosure of the upper tower and operable for creating a line of sight with a rear sight, 
 a middle segment passing through the cylindrical hole of the upper tower and 
 a lower segment, the lower segment further comprising a threaded connection structured to be coupled to the opening in the lower tower 
   displacing the upper tower of the front sight during a second displacement by releasing the force applied by the person on the upper tower.   
     
     
         14 . The method of sighting a firearm of  claim 13 , wherein the force applied during the first displacement is greater than the force exerted by one or more springs, the one or more springs being structured and operable to exert an opposing force between the upper tower and the lower tower along the axis of the sight post. 
     
     
         15 . The method of sighting a firearm of  claim 13 , wherein the person using the firearm applies the force in the first displacement with one or more fingers. 
     
     
         16 . The method of sighting a firearm of  claim 13 , wherein the top segment of the sight post comprises a ring, the ring operating so that the line of sight with the rear sight extends through the ring. 
     
     
         17 . The method of sighting a firearm of  claim 13 , wherein the middle segment of the sight post comprises a flange, the flange being larger than the cylindrical hole of the upper tower and operable to statically oppose the force between the upper tower and the lower tower. 
     
     
         18 . The method of sighting a firearm of  claim 13 , wherein the upper tower and the lower tower are coupled together by one or more extensions mated to one or more sockets, the extensions and sockets structured and configured to prevent movement of the upper tower in an x plane and a y plane relative to lower tower. 
     
     
         19 . The method of sighting a firearm of  claim 13 , wherein the step of rotating the sight post occurs after the first displacement and before the second displacement. 
     
     
         20 . The method of sighting a firearm of  claim 13 , wherein the springs are compression springs.