US2925656A - Archery bow sight - Google Patents

Description

Feb. 23, 1960 J. GENOVESE 2,925,656

ARCHERY BOW .SIGHT Filed Aug. 30. 1955 Flya F/ '9.4

IN VEN TOR. thsqob G'ezzovese I BY ATTORNEY 3 Ciaizns. i. 33--46) This invention relates to a sight for an archers bow and more particularly, to such sights which are adapted to be mounted on a bow to improve the accuracy of the archer at different ranges.

It has become generally accepted in modern day archery that archery shooting is divided into five partsstance, nock, draw, hold, and loose. The stance is the adjustment of the feet and the bow. Nocking deals with placing the arrow at the right point on the bow string. The draw is drawing the string and the arrow into position ready for the release or loose. The hold is holding the arrow and bow in. drawn position while checking over the other elements of archery shooting.

It is generally accepted that each of the above parts or elements, except the stance, should be the same for each shot in order to obtain consistent accuracy. For each individual archer, the arrow is necked at the same point on the bow string for each shot. The string and arrow is drawn to the exact so-called anchor point which is the spot on theface or head of the archer which the string presses when the arrow is in full draw. The arrow is always drawn full-and no more-for each shot. For perfect shooting, the loosing is the same for each shot. The only change for different ranges is the inclination of the bow.

When the arrow leaves the bow it does not fiy flat but 'inscribes a long parabola to the earths surface. Given a how, an arrow and a target, there is only one place from which the shooter, using proper form, can shoot directly or point blank at the target and hit it; If the shooter is further back from the target and he aims dead at the center the arrow will drop short. If closer, the arrow will sail high. Thus, the inclination or elevation of the bow has to be varied for different distances from the target. This is the only change made for shots of different range. Either the archer relies upon instinct for determining the correct inclination or elevation of the bow or he uses a point of aim or a sight.

In using a point of aim, the archer'determines'the distance from the target at which he can aim point blank at the target and hit it. This point is frequently referred to as the real mark. The archer in moving away from the target beyond the real mark, establishes points of aim located behind the target. In establishing other points of aim for distances closer to'the target, -he picks' points located in front of the target.

In effect, present day bow sights put the point of slot directly on, the bow. The sight permits the archer to align a cross piece fixed on the how with the target, thus obtaining the correct inclination or elevation of the bow.

Sights are comparatively new. Some are quite complicated being equipped with intei'changeable prisms. Others are extremely simple. in any event, the present day how sights have not been proven too satisfactory because it requires a mechanical adjustment of the sight for different ranges.

The object of this invention is to provide a bow sight sight.

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which does not require anyadjustment once set for the individual archer.

Another object of this invention is to provide a simple bow sight from which the archer can determine the tra jectory of an arrow shot from the bow.

Still another object of this invention is to provide a bow sight which is very simple and from which the archer can read directly the straight line distance of the tra= jectory of the arrow.

Other objects of this invention will become obviousto one skilled in the art of archery upon reading the speci= fication in conjunction with the accompanied drawings wherein:

Fig. 1 shows an oblique view of the bow sight mounted on a bow.

Fig. 2 discloses a side elevational view of the bow sight taken along the plane II-II of Fig. 3.

Fig. 3 discloses a front elevational view of the bow sight. I

Fig. 4 shows a cross sectional, front elcvational view of the bow sight taken along the plane IVIV of Fig. 2.

Fig. 5 shows a side elevational view of a modified form of how sight.

Fig. 6 shows an exploded view of the clamp for clamp ing the bow sight on a bow.

Fig. 7 shows a cross sectional view taken along the plane VHVII of Fig. 6.

Briefly, this invention is concerned with a bow sight for an archery bow. This how sight is adapted to be supported on a bow. It includes a dial and a pointermember. movable with respect to each other in response to the inclination or elevation of the bow on which they are mounted. 'Indicia means are provided on the dial. for indicating the relative positions of such dial and pointer and thus the trajectory of the arrow shot from the bow. In the preferred form of this invention the indicia are marked or expressed in terms of the straight line target distance of the trajectory. 7

Referring to the drawing,reference numeral 10 .indi cates a standard or conventional form of archery how 10 having a gripping portion 1 1. The sighting vunit 20 is shown secured to the how by the clamps 4d.

Figs. 2, 3, and 4 show a more detailed drawing of the It includes the support member or bracket 21 to which is adjustably secured the cylindrical housing or dial 22. The dial or housing 22 is closed at both sides, the outer side 23 having an opening 24 for purposes de: scribed hereinafter. P V p The weight 25 to which is fixedly secured the pointer 26 is rotatably mounted on the bracket 21 and within the housing or dial 22. This is accomplished by the bolt 27 having a slotted head 28 and a threaded end 29 between which there is located an enlarged shank 3d. The weight 25 and pointer 26 are freely rotatable about the shank 30. I A washer 31 is located on shank 39 between the inner side of thehous'ing or dial 22 and the hub for the weight 25 and pointer 26. As a result of this arrangement, the weight 25 and pointer 26 are always freely 'i'otatable on the shank 3t). Tightening or loosening'of the bolt 27 does not effect such rotatable motion. A nut 32 is screwed onto the threaded end 29 of the bolt. 27. Tightening of the nut 32 onthe bolt creates a bearing the sight is pressure between the bracket 21 and the dial 22. Thus,

when it is tightened, the dial or housing 22 is rigidly. secured to the bracket 21.

The dial or housing 22 is fabricated from a transparent material-such as plastic... The pointer 26 has a transversally bent end 34' (Figs. 3' and 4) which is visible through the dial 22. The dial 22 on a portionof its circumference has indicia means for indicating the relative position of the pointer as in respect to the dial 2.2; in

Either the dial or pointer member are freely.

Also it can be mounted at difierent the broadest aspect of this invention, these indicia means can be expressed in any unit which will give an indication of the trajectory which an arrow shot from the bow will travel.

In one form, the indicia can be expressed in degrees of'the angle of inclination or projection of the bow. In this case, when the bow is held in a vertical position the pointer 26 will be positioned opposite the showing zero degrees. On the other hand, when the'bow is tilted upwardly, the pointer will be located opposite aplus degree of angle inclination. When tilted downwardly the pointer will be located opposite a negative degree of angle inclination.

in the preferred form of this invention, the indicia on the dial 22 are expressed in terms of the distance to the target. Since the arrow always follows a parabolic trajectory, the distance preferably marked on the' dialfii is the straight line distance from the shooter to the point on the trajectory that crosses the target. Figs. l and 3 show such indicia 33. in order to obtain f-the greatest range possible, the indicia 33 begin at approximately 66 from the vertical and extends to 120 from the vertical. The indicia are determined in accordance with the trajectory of the bow when held at different angles of inclination. Since the trajectory of the arrow for. each person shooting a particular bow may vary, the indicin 33 expressed in the straight line distance of-suclr trajectory may also vary for each individual.

The sighting unit 29 is clamped onto a how by the clamp 4 The clamp 49 includes 'a' clamp head'41, rectangular in shapeand having a ll-shaped elongated slot '42 in each side. The slots 42 cornmunicatewith the groove 43 extending longitudinally along the bottom end of the clamp head 41. The slots i2 and groove-43 "define a passage for the T head bolts {id having the T- shaped heads 45 extending into the'groove i3 and transversally through the slots 4-2. Thus, the bolts are longitudinally slidable in the clamp head 41. The blots '44 have threaded ends 46 on'which thewing nuts 47 are adapted to be screwed. A slotted bearing plate 48 is also provided through which the threaded ends 46' of the bolts 44 extend.

'The sight 2t) is mounted on the bow IWby placing'the bracket 21 on the side of the bow. When held in that position the clamps 49 are installed. The insideface 49 of the clamp head 41 is broughttobearagainstjthe bracket 21 and the threaded ends of the bolt extended beyond the opposite side of the bow. Plate 48is': then installed over the bolt ends 46 and the wing nuts 47 screwed on the bolts. The spacing of the bolts 44 are adjusted to correspond with the thickness of the bowltl. After this adjustment the wing nuts 47 arettightened. Tightening of the wing nuts causes the bolts 44 to be drawn together against the frontand backside of the bow'10 thus holding the sight 20 securely'fixed tothe how 10. The clamps 40 are installed'on the ends of the bracket 21 on each side of the sight 20.

"'It'should be understood that there can be substituted other means for'securing the sight '20 to the bow without departing from the scope of this invention. For exampleyscrews can be used for securing the brackets to the bow. Twine or any other type of thread could also be used. Its advantage is that it does not mar or defect the bow in: any way andthesight can be removed easily. Another advantage of the clamp 40 is that it is adapted for useon various-size bowshaving different thicknesses. placeson thebow to suit the individual.-

Operation The operation of the sighting unit described herein is very. simple. After. it has-beeninstalled-on :the' bow the dialer housing. is adjusted for each individual. This is eccomplished byloosening bolt 27 byascrewdriver inserted through opening 24 'in the side 23 of;.the'dial. The shooter first establishes the real mark, that is, the

distance from the target which if the shooter aims=directly or point blank at the hull of the target, he will hit the target. Having established this distance, the bow is held in point blank aimed position and the dial 22 adjusted until the established distance marked on the dial is located opposite the end of the pointer '26. The dial 22 is then rigidly secured in that position by tightening the bolt 27 with a screw driver inserted through the opening 24. Having set the dial '22, the indicia 33 marked on the dial will give the straight line distance of the arrow projectory for different inclinations of the bow.

For example, assume that the shooters real mark is 30 yards from the target. In adjusting the dial the shooter would loosen the bolt 27 by a screwdriver inserted through opening 24. Holding the bow in point blank aimed position, the 30 foot mark on dial 22 would be placed opposite the end 34 of the pointer (Fig. 3). Then the bolt 27 is tightened by a screwdriver inserted through the hole 24. Having set the sight, the shooter in moving away from the target, say 50 yards, would then incline downwardly to a position where the end 34 of the pointer 26 is opposite the mark on dial 22 equal to the distance which he is from the target. Shooting of the arrow in theproper manner would then cause the arrow to take a trajectory which would intersect the target.

-Modification A modification of this invention is as shown in Fig. 5. This modification provides for more accuracy than the form shown in Fig. 2. In this modification, the unit 50 base support 51 similar to thesupport of Fig. 2. The housing or dial 52 is oval shaped in order to mount two rotatable elements including the weight 53, and the pointer 54. The weight 53 is rigidly secured to a gear 55 which is freely rotatable about the bolt 56 in any manner similar to that previously described. The pointer 54 is rigidly secured to a gear 57 which is freely rotatable about the bolt 58 in any manner previously described. The gear 55 drives the gear 58. The gear ratio is 2 to 1- so that the angular movement of pointer-E lis twice that of'the weight 53. The dial SZ in this case is fixedly mounted on the bracket 51 by screws 59. With this modification, the indicia 60 of the dial 52 have graduations twice that of the indicia 33 of the dial-22. As a result, a more accurate reading can be obtained by the sight 50 than thesight 20.-

The mounting of 'the'sight 50 on the how 10 is identical to that previously described with respect to the sight 20. The adjustment of the unit is slightly different. Since the dial 52 is oval shape and fixedly secured to the bracket 51 by the screws 59, the adjustment of the device is accomplished by loosening either the bolt 56 or .-58,-:disengaging the teeth of the gears, and then rearranging the gears so that the pointer 54 isopposite the appropriate marked distance."

For example, as applied to the illustration previously described,.tl1e bolt 58, is removed and the gear.57 disengaged from the gear 55. Then, with the bowzin a point blank aimed position, gear 57 is replacedso that the end of the pointer 54 lies opposite the distantv markon the indicia equal to the distance between the realmar and the target.

Having .set the sight, the bow is shot at different distances by inclining or tilting it to a position-where the can be directly read from the bow sight and no adjustment is necessary after the first original adjustment for each archer shooting the bow has been made. It should be understood that in some cases it may be desirable to express the indicia in terms of the angle of inclination or the projection of the bow. It is possible that some other type of indicia may be desirable In the broadest aspect of this invention such modifications do not depart from the scope of the invention.

It should be understood that in describing this invention certain embodiments have been shown for purposes of illustration only. Several other and different embodiments can be made without departing from the spirit of this invention. All of these embodiments should be considered to be included within the scope of this invention except as expressly stated in the appended drawings.

I claim:

1. A combination archers bow and sight for determining the trajectory of an arrow shot from said bow member bent between its ends and having a bow string attached to and extending between said ends; said how member and bow string lying substantially on a plane; a grip on said bow member located intermediate its ends; a support member mounted on said bow member; a gravity actuated sight supported on said support member adjacent said grip; said sight including a dial and a pointer means; one of said dial and pointer means being pivotally mounted on said support member for rotation about an axis substantially normal to the plane of the is stationary; said dial having a face extending lengthwise of said how member with indicia means thereon facing said string; said pointer means having a pointer adjacent said dial face and visible with relation to the indicia means whereby one shooting an arrow in said bow can readily determine the trajectory of the arrow.

2. The combination of claim 1 in which the indicia means are expressed in distance, and said pointer is aligned with the shooters real mark distance when the shooter is aiming point blank at a target.

3. The combination of claim 1 in which the pivotally mounted one of said dial and pointer means is adjustable; means for fixing the one of said dial and pointer means in different adjusted positions; the indicia means of said dial being expressed in distance, and in one of said adjusted positions the pointer is aligned with a shooters real mark distance when the shooter is aiming point blank at a target.

References Cited in the file of this patent UNITED STATES PATENTS 37,076 Long Dec. 2, 1862 857,991 Gibson June 25, 1907 1,170,466 Switzer Feb. 1, 1916 1,220,407 Folgesong Mar. 27, 1917 1,919,106 Hamemick July 18, 1933 2,045,631 Cavender June 30, 1936 FOREIGN PATENTS 6,508 Great Britain 1890 548,297 France -q----,---.--- Oct. 17, 19 1

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