US3477130A

US3477130A - Bowsight

Info

Publication number: US3477130A
Application number: US674824A
Authority: US
Inventors: Thomas F Egan
Original assignee: THOMAS F EGAN
Current assignee: THOMAS F EGAN
Priority date: 1967-10-12
Filing date: 1967-10-12
Publication date: 1969-11-11
Anticipated expiration: 1986-11-11

Description

Nov. 11, 1969 T, F, ESAN 3,477,130

BOWSIGHT Filed Oct. 12, 1967 T- /j INVENTOR.

ra/zza: fig/w ATTORNEY United States Patent O 3,477,130 BOWSIGHT Thomas F. Egan, 3 Hawthorne Road, Gibbsboro, NJ. 08026 Filed Oct. 12, 1967, Ser. No. 674,824 Int. Cl. G01c 15/12, 21/04, 21/10 U.S. Cl. 33-46 5 Claims ABSTRACT F THE DISCLUSURE This invention is concerned essentially with a sight for an archery bow which includes a carrier attached to the bow, and an elongate graduated scale connected to the carrier for selective rotary positioning relative thereto.

Background of the invention `Accordingly, it is an important object of the present invention to provide a bowsight which overcomes the above-mentioned difficulties, is extremely simple in construction, durable and reliable throughout a long useful life, and which is admirably well suited for substantially all conditions of bow strength, arrow Weight and pull distance.

It is still a further object of the present invention to provide a bowsight having the advantageous characteristics mentioned in the preceding paragraph, which is extremely easy to use, and capable of economic manufacture for sale at a reasonable price.

Other objects of the present invention will become apparent upon reading' the following specification and referring to the accompanying drawing, which form a material part of this disclosure. Y

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts, which Will be exemplied in the construction hereinafter described, and of which the scope will be indicated by the appended claims.

Brief description of the drawing FIGURE 1 is a side elevational view showing a bowsight of the present invention in operative association with a bow.

FIGURE 2 is a top, front perspective view illustrating a bowsight of the present invention apart from a bow.

FIGURE 3 is a front elevational view of the bowsight of FIGURE 2.

FIGURE 4 is a longitudinal sectional elevational view taken generally along the line 4-4 of FIGURE 3, illustrating in phantom an alternate position of the scale of the instant bowsight.

FIGURE 5 is a transverse sectional view taken generally along the line 5--5 of FIGURE 3. Y

Description of the preferred embodiments Referring now more particularly to the drawings, and specifically to FIGURE 1, there is shown a bow, generally designated 10, having a handle part 11. Mounted on the forward side of the handle part 11 is a bowsight, generally designated 12, constructed in accordance with the teachings of the present invention.

The bowsight 12 is best seen in FIGURES 2-5, and includes an elongate attachment member or strip 15, say

3,477,130 Patented Nov. 11, 1969 ice - of metal or other suitable material, having upper and

lower end portions

16 and 17 generally coplanar and provided with respective thru apertures or

holes

18 and 19 for receiving fasteners extending into the bow handle 11. One of the

apertures

18, 19 may be laterally elongate, to permit of lateral adjustment of the attachment member or strip for extension subtantially longitudinally of the bow 10. The medial or intermediate portion 20 of the elongate attachment member or strip 15 is offset forwardly from the plane of the

end portions

16 and 17, so as to lie in a plane generally parallel to and spaced forwardly from the plane of the end portions. Formed in the forwardly offset intermediate strip portion 20, extending longitudinally thereof, may be an elongate slot or guideway 21, for a purpose appearing presently.

A carrier member, body or block 25 is arranged on the forward face or side of the intermediate region 20 of attachment member 15 and provided on its rear side with a rib or elongate boss 26 extending into the slot or guideway 21 and slidable therein. A locking member, such as a headed screw 27, may extend from the rear side of intermediate attachment member region 20, through slot 21 and threadedly into the boss or lug 26 and carrier body 25. By this construction the carrier 25 is freely slidable along and within the limits of guideway 21, and may be held or locked in any selected position of its sliding movement by tightening of the locking member or screw 27.

Extending laterally or transversely through the carrier 25, generally normal to the slot 21, is an open-ended thru bore or opening 30. The bore o-r opening 30 receives a cylindrical shank or shaft 31 which is angularly rotatable and longitudinally slidable in the bore.

Carried at one end of the shank or shaft 31 is an elongate sheet member 32 extending generally normal to the shank, so as to be rotatable therewith into and out of a position extending longitudinally of the intermediate attachment member region 20, as seen in FIGURES 2, 3 and 5, and in solid lines in FIGURE 4. The elongate sheet 32 is advantageously of a transparent, stiif or rigid material, such as plastic, and is provided with a longitudinally arranged series or row of transverse graduations having numerical indicia representing successively greater and lesser distances in opposite directions. A longitudinal line 23 is marked on the sheet 32 intersecting with the graduations. Thus, the sheet 32 with its graduations defines a scale. Further, the shank 31 is rigidly connected by any suitable means to the scale 32 at a location adjacent to one end of the scale, the scale end corresponding to shorter distance graduations.

In use, the scale is shiftable laterally by longitudinal sliding of shank 31 in carrier 25 to properly align the longitudinal line 23 for lateral accuracy in shooting. The scale 32 is also swingable about the axis of shaft 31, and in this manner calibrated for a desired combination of bow strength, arrow weight and pull distance. Upon accurate calibration, the shank 31 is set or locked in position relative to the carrier 25, as by a setscrew 33 extending threadedly through the carrier into holding engagement with the shank. Such calibration may be noted, and is repeatable, by the use of graduations or markings 34 on one side of the carrier 25 surrounding opening 30, in conjunction with a suitable marking 35 on the shaft 31.

More particularly, with the attachment member 15 secured to a bow, and the scale 32 disposed generally vertically or in a plane generally parallel to that of the intermediate attachment member portion 20, one or more arrows are shot at a target spaced ten yards away. Between shots the scale 32 is adjusted vertically by movement of carrier 25 along slot 21 to obtain proper distance, and the scale is adjusted horizontally by shifting shaft 31 in the carrier to obtain lateral accuracy. With the scale 32 properly located for a ten-yard distance, one or more arrows, of the same weight, are then shot at a titty-yard distance, and between shots the scale 32 is rotated about the axis of shaft 31 to properly locate the fifty-yard graduation for accurate sighting. The premarked scale 32 is then calibrated for tenand fiftyyard distances, as well as all intermediate distances. Additional calibration may be made for use under different Conditions, say different arrow weights, and these calibrations noted so that it is only necessary to rotate the shaft 31 to another, predetermined angular location upon changing arrows. Obviously, this ease and accuracy of calibration throughout the entire range of yardages, as well as the ease in changing calibration greatly facilitates actual use of a bow, as in hunting, and the like. Also, if desired the entire sight may be quickly and easily transferred to a diterent bow and quickly and easily calibrated anew, or by predetermination of calibration.

The above-described calibration for particular combinations of bow strength, arrow weight and pull distance is illustrated in FIGURE 4, wherein is shown in dot-anddash outline an alternate position of the scale 32. The phantom position of scale 32 shown in FIGURE 4, as compared to the solid-line position thereof, corresponds to calibration for a relatively greater bow strength, relatively light arrow weight, and/or relatively greater pull distance, -wherein the arrow trajectory need not be so high for a particular target distance.

Thus, it will be appreciated that the bowsight of the instant invention is admirably Well suited for use with substantially all bow constructions, and their use in conjunction With arrows of substantially all weights and substantially all pull distances.

From the foregoing, it is seen that the present invention provides a bowsight which fully accomplishes its intended objects and is well adapted to meet practical conditions of manufacture, installation and use.

Although the present invention has been described in some detail by way of illustration and example for purposes of clarity of understanding, -it is understood that certain changes and modications may be made within the spirit of the invention.

What is claimed is:

1. A bowsight comprising an attachment member for securement to a bow, a carrier mounted on said attachment member, an elongated plate with indicia there on forming a scale for indicating ranges, said plate disposed generally longitudinally of a bow, a shank extending laterally from said plate and rotatably received by said carrier for angular positioning of said scale about an axis extending laterally of the bow and thereby presenting a foreshortened appearance of said scale in a plane laterally of said bow, and fastener means for securing said shank to said carrier at a selected angular position of said scale, said angular positioning and foreshortened appearance of said scale adapting said scale for a particular combination of bow strength, arrow weight and pull distance.

2. A bowsight according to claim 1, in combination with mounting means mounting said carrier for adjustable positioning on said attachment member longitudinally of a bow.

3. A bowsight according to claim 1, said plate comprising a transparent sheet, said scale on said plate comprising a longitudinally arranged series of graduations thereon indicating successively longer shooting distances, said shank extending laterally from said scale adjacent to the graduations indicating shorter distances.

4. A bowsight according to claim 1, said attachment member comprising an elongate strip having end portions for securement to a bow, and a longitudinal slideway on the medial region of said strip, said carrier being slidable on said slideway, and locking means for locking said carrier at a selected position on said slideway.

5. A bowsight according to claim 4, said carrier comprising a body having formations for sliding engagement with said slideway, said body having an opening extending transversely of said slideway for rotatably receiving said shank, and setting means for setting said shank at a selected position of rotation relative to said carrier.

References Cited UNITED STATES PATENTS 1,982,489 11/ 1934 Wilcox. 2,742,702 4/ 1956 Williams. 3,027,648 p 4/ 1962 Crook.

LEONARD FORMAN, Primary Examiner S. L. STEPHAN, Assistant Examiner