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Publication numberUS3431652 A
Publication typeGrant
Publication dateMar 11, 1969
Filing dateSep 21, 1966
Priority dateSep 21, 1966
Publication numberUS 3431652 A, US 3431652A, US-A-3431652, US3431652 A, US3431652A
InventorsLeatherwood James M
Original AssigneeLeatherwood James M
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Rangefinder and automatic reticle setter
US 3431652 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

BBS-261- -w- J. L EATHERWOOP H mennnnnn AND Ami 1411C 'RB'QIQLEV m Filed s t g1 JAMES M. LEATHERWOOD INVENTOR.

AT TORNE Y United States PatentO 3 Claims ABSTRACT OF THE DISCLOSURE Two integral cam faces on the inside of a scale ring manually adjustable around the barrel of a telescopic sight are engaged by followers which elevate and vertically space two horizontal cross hairs pivotally mounted in the barrel. When the hairs have been so separated as to bracket a standard height target seen through the sight, the lower hair is automatically at the proper elevation to be aimed at that target at the range then indicated on the scale ring. The ring is made readily removable and replaceable by rings with cam surfaces designed for other target sizes.

This invention relates to telescopic sights for guns .and has reference to a range finder which automatically adjusts the trajectory of a gun without necessarily knowing the distance to the target. While the invention is intended for use on rifles, primarily, it is adaptable for use on all guns.

Heretofore, telescopic sights such as referred to were pivotally mounted on the gun barrels and were positioned, in part, by springs between the barrels of the scopes and the barrels of the guns. Such spring mounting was objectionable because foreign particles could interfere with the sighting and because the exposed springs were subject to accidental displacement.

The primary object of the invention is to provide a telescopic sight for guns including a range finder having reticle framing means automatically adjusting the trajectory of the gun and wherein the barrel of the sight is rigidly mounted parallel with the length of the gun barrel.

Another object is to provide means for easily and conveniently changing cams comprising a part of the automatic means so as to be usable with charges of different magnitudes.

A further object is to provide a gun sight of the described class wherein all moving parts other than the adjusting ring are fully contained within the scope barrel. These and other objects of the invention will become apparent from the following description and the accompanying drawing, wherein:

FIGURE 1 is a top plan view of a telescopic sight or scope according to the invention.

FIGURE 2 is an enlarged fragmentary longitudinal sectional view of the center portion of the scope illustrated in FIGURE 1.

FIGURE 3 is a perspective view of that portion of the scope illustrated in FIGURE 2 and showing the sco barrel and adjusting ring in section.

FIGURE 4 is a transverse sectional view taken on line 44 of FIGURE 2.

FIGURE 5 is a broken perspective view of one of the adjusting ring halves and showing the two cams therein.

FIGURE 6 is a schematic view showing the reticle framing a near target.

FIGURE 7 is a schematic view similar to FIGURE 6 but showing the reticle framing of the target at a greater distance, and

Patented Mar. 1 1, 1969 FIGURE 8 is a schematic'view showing the lower framing hair and the vertical hair on target.

The scope shown includes the usual barrel 10, objective lens assembly 11 and ocular lens assembly 12. For the purpose of this description, that end of the scope including the ocular lens assembly 12 will be referred to as the rear of the scope, and that end including the objective lens assembly 11 will be referred to as the forward end. The scope is mounted on the gun, parallel with the axis of the gun barrel, by means of a conventional frame, not shown. The forward and rear portions 14 and 13 of the scope barrel 10 are connected by threads 15 rear- .wardly of the barrels center, and the forward end of said rear portion is enlarged to provide a shoulder 16 around the threadedly received forward portion. Around the forward barrel portion 14 and in turning contact with the shoulder 16 there is an adjusting ring 17 which may have calibrations 18 around a portion of its surface adjacent its forward periphery for registering with a fixed line 19 on the forward barrel portion 14. A retainer ring 20 is mounted around the forward portion 14 and is in contact with the adjusting ring 17. As shown in FIGURE 1, the fixed line 19 extends across the retainer ring 20 where it is in juxtaposition with the calibrations 18.

The adjusting ring 17 is transversely divided into halves 17a and 17b which are detachably secured to each other by screws 21 received in ribs 22 along the adjoining edges of the ring halves. Within the forward end of one adjusting ring half 17b there are two arcuate internal earns 23 and 24 which have to do with adjusting lower and upper horizontal aiming and framing hairs 25 and 26.

The horizontal hairs 25 and 26 are transversely supported in the forward ends of tubes 27 and 28 of different diameters and these tubes are loosely received one within the other. The larger diameter tube 27 is pivotally mounted at its rear end for vertical angular movement by means of pins 29 projecting inwardly from opposite sides of the forward portion 14 of the scope barrel 10. Similarly, the smaller diameter tube 28 is pivotally mounted at its rear end by pins 30 projecting inwardly from opposite sides of the larger diameter tube 27. Both tubes 27 and 28 are cut away along their upper forward portions at 31 and 32 so as to increase their pivotal movement. The lower forward portion of the inner tube 28 is vertically recessed at 33 so as to avoid contact with the lower horizontal aiming hair 25. By this arrangement both hairs 25 and 26 are positioned substantially one above the other at all times. A stationary centrally located vertical hair 34 is mounted just forwardly of the horizontal movable hairs 25 and 26 and is held in place by shouldered retainers 35 in the forward barrel portion 14. To those versed in the art it will be apparent that the tubes 27 and 28 are, in effect, frames or yokes, and that additional portions of the tubes may be cut away and yet function as intended. There is a light compression spring 36 mounted in the forward barrel portion 14 which urges the outer tube 27 upwardly, and there is a light compression spring 37 in the first tube which urges the inner tube 28 upwardly. The cutaway portion 31 of the outer tube 27 extends rearwardly of the cutaway portion 32 of the inner tube 28 whereby follower pins 38 and 39 may be mounted on top of the respective tubes for engagement with the cams 23 and 24 in the adjusting ring half 17b. An opening, not numbered, is provided in the barrel portion 14 to accom modate the follower pins 38 and 39.

The operation of the invention is based on the premise that the average height of a target is known and the rises of the earns 23 and 24 are made, in part, accordingly, either by calculation or empirical tests. The power of the charge being used must also be taken into consideration because the differences in charges make differences in.

horizontal center of the scope barrel 10 and is not necessarily a part of the construction. The target is framed between the horizontal hairs 25 and 26 by turning the adjusting ring 17 and which action not only serves as a range finder but adjusts the aiming hair to some distance below the transverse center line C. The vertical hair line 34 and the aiming hair 25 are then used for aiming and firing as shown in FIGURE 8. It is by reason of the position of the aiming hair 25 that the gun barrel is tilted to the correct trajectory angle.

What is claimed is:

1. In a telescopic sight including a scope barrel for mounting on a gun at least substantially parallel with the length of the barrel thereof, an adjusting ring rotatably mounted around said scope barrel, upper and lower horizontal hairs within said scope barrel, separate pivotally mounted frames supporting said hairs for vertical I 4 I l I I .2. In a telescopic sight as defined in claitnl, the construction wherein said adjusting ring is demountably transversely divided.

3. In a telescopic sight as defined in claim 1, the construction wherein said pivotally mounted frames consist of one tube within another.

' References Cited UNITED STATES PATENTS 2,126,335 8/1938 Langsner. 2,155,389 4/1939 Arden. 2,155,390 4/1939 Arden. 3,340,614 9/ 1 967 Leatherwoo d.

I FOREIGN PATENTS 27,525 2/ 1907 Austria.

1,204 1/1888 Great Britain. 28, 194 12/1911 Great Britain.

ROBERT B. HULL, Primary Examiner.

. US. Cl. X.R.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2126335 *Nov 2, 1934Aug 9, 1938Dietzgen Eugene CoTelescope
US2155389 *Mar 9, 1937Apr 25, 1939Ultrad Products IncSighting means for guns
US2155390 *Nov 1, 1937Apr 25, 1939Ultrad Products IncSighting means for guns
US3340614 *Oct 19, 1964Sep 12, 1967Leatherwood James MAdjustment means for gun sighting scope
AT27525B * Title not available
GB188801204A * Title not available
GB191128194A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3782822 *Nov 8, 1971Jan 1, 1974M SpenceMethod and apparatus for automatic ranging with variable power telescopic gun sight
US4389791 *May 4, 1981Jun 28, 1983W. R. Weaver Co.Range-finding telescopic sight
US4945646 *May 9, 1986Aug 7, 1990Interaims AktiebolagArrangement in a luminous dot sighting instrument
US4986645 *May 9, 1986Jan 22, 1991Interaims AktiebolagGun sighting telescope
US5511317 *Apr 22, 1994Apr 30, 1996Allen; Ivan C.Automatic sighting device for a projectile launcher
US5920995 *Dec 8, 1997Jul 13, 1999Sammut; Dennis J.Gunsight and reticle therefor
US6032374 *Aug 5, 1998Mar 7, 2000Sammut; Dennis J.Gunsight and reticle therefor
US6357158Sep 14, 1998Mar 19, 2002Smith, Iii Thomas D.Reticle-equipped telescopic gunsight and aiming system
US6453595Mar 6, 2000Sep 24, 2002Horus Vision, LlcGunsight and reticle therefor
US6516699Jun 14, 2001Feb 11, 2003Horus Vision, LlcApparatus and method for calculating aiming point information for rifle scopes
US6591537 *Mar 19, 2002Jul 15, 2003Thomas D. SmithReticle for telescopic gunsight and method for using
US6681512Mar 6, 2002Jan 27, 2004Horus Vision, LlcGunsight and reticle therefor
US6729062 *Jan 21, 2003May 4, 2004Richard L. reticle and method for producing the same
US7603804Sep 3, 2004Oct 20, 2009Leupold & Stevens, Inc.Ballistic reticle for projectile weapon aiming systems and method of aiming
US7684114Jan 26, 2006Mar 23, 2010Leupold & Stevens, Inc.Scope with improved magnification system
US7705975Aug 14, 2006Apr 27, 2010Michael Christopher FarrisReticle
US7738082Oct 22, 2007Jun 15, 2010Leupold & Stevens, Inc.System and method for measuring a size of a distant object
US7832137Dec 28, 2006Nov 16, 2010Horus Vision, LlcApparatus and method for calculating aiming point information
US7856750Nov 12, 2003Dec 28, 2010Horus Vision LlcApparatus and method for calculating aiming point information
US7937878Mar 27, 2006May 10, 2011Horus Vision LlcApparatus and method for calculating aiming point information
US8049959Aug 17, 2010Nov 1, 2011Leupold & Stevens, Inc.Scope with improved magnification system
US8109029May 4, 2004Feb 7, 2012Horus Vision, LlcApparatus and method for calculating aiming point information
US8172139Nov 22, 2010May 8, 2012Bitterroot Advance Ballistics Research, LLCBallistic ranging methods and systems for inclined shooting
US8230635 *Dec 27, 2010Jul 31, 2012Horus Vision LlcApparatus and method for calculating aiming point information
US8286384Jun 27, 2008Oct 16, 2012Leupold & Stevens, Inc.Ballistic range compensation for projectile weapon aiming based on ammunition classification
US8353454May 14, 2010Jan 15, 2013Horus Vision, LlcApparatus and method for calculating aiming point information
US8656630Jun 9, 2011Feb 25, 2014Horus Vision LlcApparatus and method for aiming point calculation
US8701330Jan 2, 2012Apr 22, 2014G. David TubbBallistic effect compensating reticle and aim compensation method
US8707608 *Jul 30, 2012Apr 29, 2014Horus Vision LlcApparatus and method for calculating aiming point information
USRE35409 *Dec 6, 1993Dec 24, 1996Moore; Sidney D.Electrically addressable opto-electronic indicator for making dynamic evaluations of microscopic or larger subjects
WO1987007004A1 *May 9, 1986Nov 19, 1987Interaims AbGun sighting telescope
U.S. Classification42/122, 33/353, 356/21
International ClassificationF41G3/06, F41G1/38
Cooperative ClassificationF41G1/38, F41G3/06, F41G1/473
European ClassificationF41G1/473, F41G1/38, F41G3/06
Legal Events
Mar 8, 1984AS06Security interest
Effective date: 19831220
Mar 8, 1984ASAssignment
Effective date: 19831220
Sep 15, 1980AS06Security interest
Effective date: 19800909
Owner name: LEATHERWOOD .J.M.