Telescope inner tube locking device and method

• US 5,363,559 A
• Filed: 11/16/1992
• Issued: 11/15/1994
• Est. Priority Date: 11/16/1992
• Status: Expired due to Fees

• Current Assignee: Burris Company Incorporated
• Original Assignee: Burris Company Incorporated
• Inventors: McCarty, John P.
• Primary Examiner(s): Wirthlin, Alvin
• Application Number:
  US07/977,114
• Time in Patent Office: 729 Days
• Field of Search: 33/245, 33/246, 33/247, 33/248, 33/297, 33/298, 359/417, 359/418, 359/427, 359/428, 359/811, 359/815, 359/819, 359/822
• US Class Current: 42/122
• CPC Class Codes: F41G 1/38 Telescopic sights specially adapted for smallarms or ordnance telescopic sights in general G02B; Supports or mountings therefor

Abstract

A telescope inner tube locking device and method for positively locking the telescope inner tube in it'"'"'s previously aligned position. The locking is accomplished by using a biased locking screw which operates to apply a force against the inner tube of the telescope while the windage and elevation adjustment screws on the telescope are moved. Thereafter, the biased locking screw locks the inner tube against the windage and elevation adjustment screws. In a modification of the preferred embodiment, the inner tube of the telescope may also be locked by using a locking screw constructed similarly to the elevation or windage screws in combination with a separate spring bias. The separate spring bias will apply a force against the windage and elevation screws of the telescope and the locking screw will lock the inner tube in place. The tube may also be locked by a third locking screw without using a bias. The methods disclosed herein use the applicant'"'"'s invention to positively lock the inner tube in it'"'"'s desired aligned position so that an accidental dropping or jarring of the firearm or heavy recoils of the firearm will not result in a misalignment of the previously aligned inner tube of the telescope.

Claims

1. An inner bias locking means for use in at least a three point adjustment for an inner tube of a telescope mounting of the type having an adjustable inner tube member surrounded by an outer elongated member of the type having a surrounding mounting area for mounting the telescope to a firearm on the outer member at two spaced apart positions, comprising:

(a) an outer locking means, movably attached to the outer member and moveable towards and away from the inner tube;

(b) an inner bias force means, movably contained within the outer locking means and positioned to provide a directional bias force from the outer locking means to the inner tube; and

(c) means, associated with the outer locking means, to move the outer locking means to a rigid position against the inner tube in a desired position, the movement of the outer locking means to a rigid position serving to inactivate the inner bias force means by moving the outer locking means against the inner tube.

2. The bias locking means as defined in claim 1 wherein the inner bias force means moveably contained within the outer locking means comprises:

(a) a spring cap; and

(b) a compression spring, positioned within the spring cap and urging a directional force on the spring cap so that the spring cap can engage the adjustable inner tube member.

3. A method for adjusting and then positively locking a telescope inner lens mounting tube in a desired position while the telescope is attached to a firearm, comprising the steps of:

(a) providing the telescope with at least three locking means spaced apart around the telescope tube and with at least one guide tube bias, one of the locking means being a windage adjustment screw, one of the locking means being an elevation adjustment screw and one of the locking means being an oppositely positioned biased locking means operating to bias the inner tube and to lock the inner tube against the other two locking means as desired;

(b) adjusting the position of the inner tube as many times as desired by using two of the locking means to move the inner tube against the bias until a desired position is obtained; and

(c) locking the inner tube in a desired position by operating the oppositely positioned locking means to lock the inner tube against the windage and elevation adjustment screws and to thereby retain the desired and locked position of the inner tube regardless of motion to the firearm and guide tube.

4. The method for adjusting and then positively locking a telescope inner lens mounting tube as defined in claim 3 further comprising:

(d) unlocking the oppositely positioned locking means; and

(e) repeating steps (b) and (c) to obtain a new locked position of the inner tube when desired.

5. The method as defined in claim 3 wherein the telescope is provided with at least four locking means spaced apart around the telescope tube with at least two of the locking means being biased locking means operating with a self contained bias to lock the inner tube against the remaining inner tube locking means.

6. A method for adjusting and then positively locking a telescope inner tube in a desired position while the telescope is attached to a firearm, comprising the steps of:

(a) providing the telescope with at least three erector guide tube locking means spaced apart around the telescope tube, one of the locking means being a windage adjustment screw, one of the locking means being an elevation adjustment screw and one of the locking means being an oppositely positioned locking means to lock the inner tube against the other two locking means as desired;

(b) providing the telescope with a separate tube biasing means for urging the inner tube towards the windage and elevation adjustment screws;

(c) adjusting the position of the inner guide tube as many times as desired by using two of the locking means to move the inner tube against the separate tube biasing means until a desired position is obtained; and

(d) locking the inner tube in a desired position by using the oppositely positioned locking means to lock the inner tube against the windage and elevation adjustment screws and to thereby retain the desired and locked position of the inner guide tube regardless of motion to the firearm and inner tube.

7. A bias locking means for use in at least a three point adjustment for a telescope mounting of the type having an adjustable inner tube member surrounded by an outer tube member of the type having a surrounding outer tube mounting area for positioning of adjustment screws, comprising:

(a) an outer locking means, movably attached to the outer tube and moveable towards and away from the inner tube, the outer locking means comprising in part;

(1) a lock bushing rotatably mounted to the outer tube mounting area;

(2) an inner locking screw, rotatably mounted to the lock bushing;

(3) a lock ring rotatably mounted on the lock bushing;

(4) a cap, rotatably mounted to the lock bushing; and

(b) an inner bias force means, movably contained within the outer locking means and positioned to provide a directional force or bias to the inner tube; and

(c) means, associated with the outer locking means, to move the outer locking means to a rigid position against the inner tube in a desired position, the movement of the outer locking means to a rigid position serving to inactivate the inner bias force means.

8. The bias locking means as defined in claim 7 further comprising an O-ring seal positioned between the locking screw and the lock bushing and an O-ring seal positioned between the lock bushing and the outer tube mounting area to seal the inner tube from moisture and contaminates on the outside of the outer tube.