US2783539A

US2783539A - Mounting for telescopic sights

Info

Publication number: US2783539A
Application number: US425963A
Authority: US
Inventors: Dahlberg Jonas Folke
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-04-27
Filing date: 1954-04-27
Publication date: 1957-03-05
Anticipated expiration: 1974-03-05

Description

March 5, 1957 Filed April 27, 1954 J. F. DAHLBERG SRH 'ROOM 2 Sheets-Sheet l March 5, 1957 J. F. DAHLBERG 2,783,539

MOUNTING FOR TELEscoPIc slams Filed April 27, 1954 2 Sheets-Sheet 2 United States VO MOUNTING FOR TELESCOPIC SIGHTS Jonas Folke Dahlberg, Seattle, Wash.

Application April 27, 1954, Serial No. 425,963

Claims. (Cl. 33-56) This invention relates to gun sights, and particularly to a mounting for telescopic 'sights of the type adapted for use on rifles, Shotguns and other similar small arms. It 'is an object of the invention to provide a sight of this character having features of mounting and adjustability by means of which extremely accurate setting and shooting results will be obtained.

It is an object of the invention to provide a telescopic sight mounting by means Aof which the 4sight can be easily attached to or readily detached from the gun; by means of which elevating and lateral adjustments of the sight are easily and accurately secured, to thereby secure exceptional accuracy in shooting.

It is an object of the invention to provide a mounting means of relatively simple construction and which can be readily attached to standard guns, and having numerous other advantages apparent to those skilled in this art.

. With these and other objects lto be hereinafter set forth in view, I have devised the arrangement of parts to be described and more particularly pointed out in the claims appended hereto.

In the accompanying drawings, wherein an illustrative embodiment of the invention is disclosed, Fig. l is a side elevational view ofthe improved sight mounting, showing the same applied to a gun;

Fig. 2 is a vertical sectional view of the rear portion of the mounting, lshown in yan enlarged scale;

Fig. 3 is a vertical sectional view through the front portion of the mounting;

Fig. 4 is la sectional view, taken at right angles to that of Fig. 3 and substantially on the line 4 4 of Fig. 3, look` ing in the direction of the arrows;

Y Fig. 5 is a top plan view of the saddle or seat for the rear mounting; .A

Fig. 6 is a sectional view, ,taken substantially on the line 6 6 of Fig. 5, looking in the direction of the arrows;

Fig. 7 is a side elevationf, with ia portion shown in section, of the holder for the telescopic sight;

Fig. 8 is a view of the separated elements which comprise the rear portion of themounting;

Fig. 9 is a top plan view of the clamp employed in the rear portion of the mounting;

Fig. 10 is a top plan view of the threadedv plug;

Fig. 11 is a top plan view of the leaf spring which is located 'above and has a part in engagement with the top of the threaded plug;

Fig. 12 is a side elevational view, with a portion in section, of two parts of the frontportion of the mounting;

Fig. 13 is a perspective view of'one of the lugs for the support of the telescopic sight;

Fig. 14 is a face View of the clamping lug employed at the forward end of the front mounting, and

Fig. 15 is a view looking at the under side of the main element of the front mounting.

ln the drawing, 1 indicates a portion of a gun or rifle upon which the improved telescopic sight mounting is ICC fitted. Fitted over the barrel is a mounting member 2 upon which is detachably fitted a saddle or seat 3. The Asaddle or seat 3 is concaved on its under surface to enable the same to conform to the curvature of a part of the mounting member 2 and the seat 3 is apertured as at 4 to receive a fastening screw shown -at 5 in Fig. 2, `and which is threadably received in a complementary hole provided in 'the mounting member 2. Provided in the saddle or seat 3 is a keyhole-shaped opening 6 which registers with a similar opening, not shown, but formed in the top of the mounting member 2, when the 'saddle is fitted over the mounting member 2 and is Isecured thereto by means of the screw 5.

At 7 is shown an externallythreaded plug member which is formed on its lower end with a shank 8 integrally provided with a slotted head 9 by means of which the plug is rotatively adjusted. The shank 8 normally fits through the keyhole slot 6 and through the registered keyhole slot in the mounting member 2, and when the device is in its operative position, 'as shown in Figs. 1 and 2, the shank extends through the narrow part of the slot 6 thus coupling the plug 7 to the saddle or seat 3. When the plug member 7 is to be adjusted, the sight is shifted rearwardly, as will be explained, until the lshank 8 can be raised up and out through the enlarged part of the keyhole slot. An internally-threaded, knurled locking ring 10 is threadable on the plug 7 `and maintains the same in any desired position of adjustment as will be hereinafter explained.

At 11 is shown the holder for the telescopic Isight 12. The holder 11 is preferably composed of a substantially C-shaped housing which fits around the telescopic sight between its ends and is preferably, but not necessarily, composed of sheet metal, reinforced or -stiffenedat its lower edges by the upturned flanges 13. The central pory tion of the body of the telescopic sight 12 rests within the holder 11 by being support-ed upon the triangulated lugs Ishown at 14 and located within the holder 11. Each of the lugs 14 is provided with a flange 15 which fits behind one or 'the other of the anges 13 formed onthe sight holder 11, as seen in Fig. 4. One of the elemenis of the rear mounting for the telescopic sight consists of the ring-clamp 17, shown in Figs. 8 Iand 9. Said clamp is provided with an internally-threaded opening 18 which is threadable on the plug 7, and the spaced jaws 19. Extending through the jaws 19 is the threaded opening 20 which receives a threaded screw 21 to thereby draw the jaws toward one another 'and hold the clamp 17 clamp Aingly upon the threaded plug 7 as clearly seen in Fig. 2.

Adjacent to its forward end, the lclamp 17 is formed with the 'threaded opening 22 which receives two screws 23. These two screws enter the opening 22 from opposite Isides of the clamp, similar to the manner in which the

screws

36 and 37 enter the part 31 shown in Fig. 4. It will be'noted that the sight holder 11 is formed adjacent to its lower edge with the openings 24, and the screws 23 pass through said openings as Well as through holes 16 provided in two of the lugs 14. This arrangement is such `that the clamp 17 is fastened in the holder 11 and is threadably and adjustably attached to the same as well as to the adjustable plug 7.

The top of the plug 7 is provided with a depression 25 (Fig. 8) and mounted in the opening 18 of the clamp 17.'

lower the sight as required. When the required vertical adjustment is obtained the mounting is locked by tightens.

ing the clamping screw 21 and turning down the locking ring 10. A lateral adjustment is obtained by tightening or loosening the screws 23 or either of them as required and calibrations 30 may be provded on the surface of the holder 11 adjacent to the heads of these screws to indicate lateral adjustments. The resilient finger 27 on the plate spring 26 provides for a clicking sound when the plug 7 is rotated thereby guiding the user and audibly indicating the extent of vertical adjustment.

The front mounting for `the telescopi-c sight includes a front mounting bar 31 which is formed with a hook portion 32 lat one end, which portion has a lip 34 fitting into a recess 33 formed in a part of the mounting member 2, as shown in Fig. 3. At this end of the mounting bar is formed a transverse, internally-threaded opening 35 adapted for the reception of the two screws shown respectively at 36 and 37 in Fig. 4. These screws pass through the holes 38 formed in the anged edge portions f the holder 11 and also through the holes 16 in two of the lugs 14, as clearly seen in Fig. 4. Calibrations 30a may be provided on the faces of the holder 11 as shown in Fig. 1 to guide in the 4adjustment ofthe screws 36 and-37. At its forward end the bar 31 is formed with a longitudinally-extending, threaded bore 39 which receives a threaded screw 40 carrying a knob or finger-piece 41. The screw passes through a hole 47 in a lug 42 which is interposed 'between the knob and the end of the mounting bar 31. Said lug 42 is formed with a tin or rib 43 which takes under the lower edge of the `bar 31 so that said lug is prevented from being rotated when the knob and screw 40 thereon is rotated. The inclination or taper on the n 43 acts as `a cam to raise or lower the forward end of the sight 12 when the knob 41 is turned as required for desirable height adjustment. The inclined surface 44 formed on the lug 42 engages against a part of the mounting member 2, as shown at 46 in Fig. 1, so that the mounting member 2 is clampingly engaged by 'the bar 31 and the co-operating lug 42. The element 42 is thus a clamping-piece and a raising and lowering cam member for the forward end of the sight.

From he foregoing, the operation of the device will be readily understood. By raising ror lowering the plug 7 by means of a screw driver or other tool inserted in slot 9, the rear end of the sight can be readily adjusted in elevation, and the plug then locked in position by tightening the lscrew 21 and threading down locking ring 10.

This adjustment is made by detaching the sight holder from the gun which is done by loosening screw 40 to an extent sufficient to enable the sight holder to be slid rearwardly along its mounting 2 until shank 8 reaches the larger portion of the keyhole slot so that the shank will pass upwardly therethrough and become accessible for adjustment. In replacing the sight holder the shank is fitted through the large end of the keyhole slot 6 and the ysight holder is pushed forward until the shank enters the narrow portion of said slot. This will bring the lip 34 into the recess 35 and when screw 40 is tightened the sight holder will be held in position. A rear lateral adjustment `of the sight is attained by tightening or loosening operation of the screws 23 or eithe'r of them as required. The front of the sight is laterally adjusted by tightening one of the

screws

36 or 37 while 'the other is loosened and elevation at the front of the sight can be had by tightening or loosening of the knob. 41.

While the device is shown for use in holding a telescopic sight, such type of sight can vbe readily removed and the rear mounting used'for holding a peep sight of damping @la the type shown for example, in my en -pending applicaf tion Seri-al No. 300,180 filed July 22, 1952, and without material change in the, rear mounting.

Having described a single embodiment of the invention, it is obvious that the same is not to be Irestricted thereto, but is broad enough Ito cover all structures coming within the scope of the annexed claim-s.

What I claim is:

l. A mounting for gun sights comprising a saddle titted above a gun barrel, the saddle being formed with a keyhole opening, a threaded plug having a shank fitted in said keyholeopening, said shank having a slotted vhead by means of which the shank is rotated, a locking ring threadably fitted on the plug, a split clamping ring threadably fitted on the plug, means for tightening the clamping ring on the plug, a telescopic sight holder attached to the clamp by a pair of screws which are independently adjustable through the clamping ring to there by laterally adjust the/sight holder relatively to said y2.251 mounting for gun sights comprising, a seat tting over a gun barrel, a threaded member rotatable in` x the seat, a clamp fitted on the threaded member, thev threaded member being threadably adjustable through' the clamp, a sight holder carried by the clamp, fasteningA means attaching the holder to the clamp, said fastening means constituting adjustment elements by which thc sight holder is adjustmrgnsversely of the clamp.

3. A mounting for gun sights as provided for in claim 2, wherein the clamp holds a spring nger disposed within it, said spring finger being in contact with the top of the threaded member, the top of the threaded member being serrated gioni), 'v by the spring finger when the threaded member is rotatably adjusted within the clamp.

4. A mounting for gun sights comprising, a saddle fitted above a gun barrel, a threaded plug rotatively anddetachably connected to said saddle, a threaded locking ring threadable on the plug, a split clamping ring threadable on the plug above the locking ring, a sight holder mounted above the plug, means for attaching the sight holder to the clamping ring, said means consistingvof screws entering the clamping ring and adjustable there through to permit lateral adjustment of the sight holder relatively to the clamping ring.

5. A mounting for gun sights comprising, a housing fitted around and embracing a telescopic sight, said housing being substantially C-shaped in cross section, supports within the housing upon which the sight is rested, mounting means for the rear portion of the housing comprising a clamp adjustably attached to the housing by screws which, by their adjustment relatively to the hous` ing and clamp, permit lateral adjustment of the housing relatively to said clamp, a saddle mounted on the gun, an adjustable threaded plug extending through the saddle and being vthreadably received in the clamp, and

a locking ring adjustable on the plug between the clamp and saddle.

References Cited in the le of this patent UNITED STATES PATENTS