US2906086A

US2906086A - Archer's bowstring jig

Info

Publication number: US2906086A
Application number: US713976A
Authority: US
Inventors: Jack K Wilson; Norman E Wilson; Robert S Wilson
Original assignee: Individual
Current assignee: Individual
Priority date: 1958-02-07
Filing date: 1958-02-07
Publication date: 1959-09-29
Anticipated expiration: 1976-09-29

Description

J. K. WILSON ET AL ARCHERS BOWSTRING JIG Sept. 29, 1959 2 Sheets-Sheet 1 Filed Feb. '7, 1958 INVENTORS JWCK M 140450, IVORMfl/V E. WILSOM' BY eoeser 6'- w W FEM ATTOFZN EYE.

2 Sheets-Sheet 2 Filed Feb. 7, 1958 INVENTORS J4CK K- WILSON,

AT TDENE Y5 2,906,086 ARCHERS BOWSTRING .lIG

Jack K. Wilson, Norman E. Wilson, and Robert S. Wilson, Springfield, Mo.

Application February 7, 1958, Serial No. 713,976

11 Claims. (Cl. 571) This invention relates to a device for making archers bowstrings of varying length and, more specifically, the invention pertains to a jig for making the bowstrings.

One of the primary objects of this invention is to provide a device of the type generally referred to above for making a multiple strand bowstring from a single stand of material.

Another object of this invention is to provide a device for making a bowstring formed of hemp, plastics, or other suitable flexible tensionable materials, the bowstring per se being formed of a plurality of strands of the material.

A further object of this invention is to provide an archers bowstring jig for forming a multiple strand bowstring with means for quickly and easily separating the strands to form the nocks at each end of the bowstring, and for forming the serving thereof.

This invention contemplates, as a still further object thereof, the provision of an archers bowstring jig which is non-complex in construction, assembly and operation, inexpensive to manufacture, and durable in use.

Other and further objects and advantages of the instant invention will become more evident from a consideration of the following specification when read in conjunction with the annexed drawings, in which:

Figure 1 is a perspective view of the bowstring jig as employed during one operation in making the bowstring;

Figure 2 is a perspective view of the bowstring jig as utilized in a further operational stage;

Figure 3 is a perspective view of the bowstring jig as employed in the final stage of making the bowstring;

Figure 4 is a perspective View of a bowstring formed of multiple strands of material and constructed in accordance with this invention;

Figure 5 is a longitudinal detailed, cross-sectional view, partly in elevation, and taken on the vertical plane of line 5-5 of Figure 2 looking in the direction of the arrows; and

Figure 6 is a perspective View of the bowstring strand separator shown in Figures 2 and 5.

Referring now more specifically to the drawings, reference numeral 10 designates, in general, a bowstring jig constructed in accordance with the teachings of this invention. The jig 10 is seen to comprise an elongated substantially rectangular base 12 having a pair of longitudinally spaced openings 14 formed therein and extending transversely therethrough. The openings 14 are countersunk at 16 and are disposed adjacent one end of the base 12 substantially equi-distant from the opposed longitudinally extending sides thereof.

A substantially rectangular anchor block 18 is fixedly secured by conventional means to the upper side of the base 12 adjacent the other end thereof. The anchor block 18 has a centrally positioned socket 20 extending downwardly from the upper end thereof.

Slidably engaging the upper side of the base 12 is an elongated substantially rectangular adjustable bar 22 having a longitudinally extending slot 24 formed therein, the

1 slot 24 being substantially equi-distant from the longitudinally extending sides of the bar 22.

A plurality of substantially circular openings 27 extend downwardly from the upper side of the bar 22 on one side of the slot 24 in longitudinally spaced intervals, and the bar 22, adjacent one of its ends is provided with a substantially rectangular anchor block 26 having a centrally positioned socket 28 extending downwardly from the upper end thereof. Any conventional means (not shown) may be utilized to secure the anchor block 26 to the bar 22.

As is seen in the drawings, the bar 22 is superimposed on the upper side of the base 12 with the slot 24 aligned with openings 14 and with the

anchor blocks

18, 26 remotely disposed with respect to each other. The bar 22 is secured in a predetermined position (to be explained below) on the base 12 by means of screws 30 which extent upwardly through the openings 14 and the slot 24 and which terminate above the upper side or surface of the bar 22. The screws 30 have enlarged flat heads 32 which are disposed in the countersunk portion 16 of the openings 14 with the outer ends of the boltheads 32 flush with the under side of the base 12. The bar 22 is clamped to the base 12 by means of the lock washers 34 and wing nuts 36.

The

sockets

20, 28 of the

anchor blocks

18, 26, respectively, are each adapted to receive one end of a pair of identically constructed substantially

cylindrical stringer pins

38, 40. Each of the

pins

38, 40 is formed with a

circumferential groove

42, 44, respectively, adjacent its other or upper end.

Reference numeral 46 denotes, in general, a strand spreader, the function of which will be set forth below. The strand spreader 46 includes an elongated cylindrical rod 48 having an elongated substantially rectangular cross-brace 50 fixedly secured centrally thereof to one end of the rod 48. A pair of

struts

52, 54 are pivotally mounted by screws 58 on the brace 50, the struts being positioned adjacent each end of the brace 50. Each end of the strut 52 is slotted at 60, 62, respectively, and the respective opposed ends of the strut 54 are slotted at 64, 66. To serve a function to be described, the free or other end of the rod 48 is adapted to be selectively received within one of the openings 27.

The procedure of use of the jig 10 is as follows:

Reference is now made to Figure 1 of the drawings. The wing nuts 36 are loosened and the bar 22 is moved in such a manner that the rod 38 and the rod 40 are moved either nearer or further apart, according to the length of the bowstring desired. When the proper setting is made, the wing nuts 36 are locked to secure this position. Single strand bowstring material is then wrapped back and forth around the

grooves

42, 44 formed in the

rods

38, 40 until the desired number of strands 68 are wrapped.

At this point it becomes necessary for the user of the jig 10 to determine the length of the loop, or nook 70, as it is known by archers, that fits in the groove at each end of the bow. The length of the loop being determined, the length is marked on the strands. as is indicated at 72, 72. The strands are then moved around the

rods

38, 40 until the marks 72 placed thereon are in opposition with respect to the marks 72 /placed on the other end of the strands. With the marks 72, 72' in juxtaposition, the same are at center position be tween the

posts

38, 40. The rod 48 is then inserted within one of the openings 27 which is substantially equidistant from the opposed ends of the bowstring strands 68. The cross-brace 50 is disposed substantially parallel with respect to the base 12. Thereafter, the struts 52,

Patented Sept. 29, 1959 54 are rotated about the screws 56 to a position substantially perpendicular to the cross-brace 50 and the screws 56 are then tightened to maintain the struts in this adjusted position. The strands of bowstring material disposed on one side of the

stringer pins

38, 40 are flexed outwardly and disposed within the

grooves

62, 66 formed in the

struts

52, 54, respectively. The bowstring material 68 on the other side of the

stringer pins

38, 40 is also flexed outwardly and disposed within the grooves 60, 64 at the other ends of the struts'52, 54. It is now seen that the marked portions 72 and 72' are located intermediate the adjacent sides of the

struts

52, 54.

Thereafter, a protective thread 74 is wrapped around the strands 63 intermediate the

marks

72, 72 and 72', 7 2' in the manner illustrated in Figure 2.

Upon completion of this wrapping, the bowstring is removed from within the

grooves

62, 66 and 69, 64 and the strand spreader 46 is removed from the bar 22. The bowstring is then rotated back to its original position when first marked. Wrapping is then placed over both sections of the bowstring, beginning at the previously placed marks 72, 72' and runs a distance towards the center of the bowstring suflicient for durability. This then forms a protective closed loop at each end of the bow string for securing the same to a bow.

A protective wrapping 78 is wrapped around the approximate center of the strands 68 on both sides of the pins 38, 43 to form a serving. Thereafter, the completed bowstring may be removed from the jig it Having described and illustrated in detail one embodiment of this invention, it will be understood that the same is offered merely by way of example, and that this invention is to be limited only by the scope of the following appended claims.

What is claimed is:

1. A jig for making an archers bowstring comprising an elongated substantially rectangular base, an elongated substantially rectangular bar superimposed on said base, means releasably securing said bar on said base in a redctermined longitudinal adjusted position, a pair of stringer pins having one of their respective ends secured to the remote ends of said base and bar, and means on said pins for receiving a plurality of strands of howstring material wrapped therearound and extending therebetween.

2. A jig for making an archers bowstring comprising an elongated substantially rectangular base, an elongated substantially rectangular bar superimposed on said base in longitudinal sliding relation relative thereto, said base having a plurality of longitudinally extending spaced openings extending transversely therethrough adjacent one end thereof, said bar having an elongated transversely extending slot formed therein, means extending through said openings and said slot for releasably clamping said bar to said base in a preselected position rela tive thereto, a pair of stringer pins having one of their respective ends secured to the remotely disposed ends of said base and bar, and means on said pins for recciving a plurality of strands of bowstring material Wrapped therearound and extending therebetween.

3. A jig for making an archers bowstring comprising an elongated substantially rectangular base, an elongated substantially rectangular bar superimposed on said base in longitudinal sliding relation relative thereto, said base having a plurality of longitudinally extending spaced openings extending transversely therethrough adjacent one end thereof, said bar having an elongated transversely extending slot formed therein, means extending through said openings and said slot for releasably clamping said bar to said base in a preselected position relative thereto, said means comprising a screw extendin g through each of said openings and through said slot and a wing nut for each of said screws, a pair of stringer pins having one of their respective ends secured to the remotely disposed ends of said base and bar, and means on said pins for receiving a plurality of strands of bowstring material wrapped therearound and extending therebetween.

4. A jig for making an archers bowstring comprising an elongated substantially rectangular base, an elongated substantially rectangular bar superimposed on said base in longitudinal sliding relation relative thereto, said base having a plurality of longitudinally extending spaced openings extending transversely therethrough adjacent one end thereof, said bar having an elongated transversely extending slot formed therein, means extending through said openings and said slot for releasably clamping said bar to said base in a preselected position relative thereto, said means comprising a screw extending through each of said openings and said slot and a wing nut for each of said screws, a pair of stringer pins having one of their respective ends secured to the remotely disposed ends of said base and bar, and means on said pins for receiving a plurality of strands of bowstring material wrapped therearound and extending therebetween, said last named means comprising a circumferential groove formed in each of said pins adjacent the other adjacent ends thereof.

5. A jig for making an archers bowstring comprising an elongated substantially rectangular base, an elongated substantially rectangular bar superimposed on said base in longitudinal sliding relation relative thereto, said base having .a plurality of longitudinally extending spaced openings extending transversely therethrough adjacent one end thereof, said bar having an elongated transversely extending slot formed therein, means extending through said openings and said slot for releasably clamping said bar to said base in a preselected position relative thereto, said means comprising a screw extending through each of said openings and said slot and a wing nut for each of said screws, a pair of stringer pins having one of their respective ends secured to the remotely disposed ends of said base and bar, each of said stringer pins having a circumferential groove formed therein adjacent their other respective adjacent ends, said grooves receiving a plurality of strands of bowstring material wrapped therearound and extending therebetween.

6. A jig for making an archers bowstring comprising an elongated substantially rectangular base, van elongated substantially rectangular bar superimposed on said base in longitudinal sliding relation relative thereto, said base having a plurality of longitudinally spaced openings extending transversely therethrough adjacent one end thereof, said bar having a longitudinally extending slot extending transversely therethrough, a screw extending through each of said openings and said slot, a wing nut for each of said screws, said screws and nuts cooperating to releasably secure said bar to said base in a preselected position relative thereto, a substantially rectangular block fixedly secured to the ends of said base and bar remotely disposed with respect to each other, a stringer pin for each of said blocks, said stringer pins having one of their respective ends fixedly secured to their respective associated blocks, and each of said stringer pins having a circumferential groove formed therein adjacent their other respective ends, said grooves receiving therein and therearound a single strand of bowstring material to form a bowstring comprised of a plurality of strands extending between said stringer pins.

7. A jig for making an archers bowstring comprising an elongated substantially rectangular base, an elongated substantially rectangular bar superimposed on said base in longitudinal sliding'relation relative thereto, said base having a plurality of longitudinally spaced openings extending transversely therethrough adjacent one end thereof, said bar having a longitudinally extending slot extending transversely therethrough, a screw extending through each of said openings and said slot, a wing nut for each of said screws, said screws and nuts coo perating to releasably secure said bar to said base in a preselected position relative thereto, a substantially rectangular block fixedly secured to the ends of said base and bar remotely disposed with respect to each other, a stringer pin for each of said blocks, said stringer pins having one of their respective ends fixedly secured to their respective associated blocks, each of said stringer pins having a circumferential groove formed therein adjacent their other respective ends, said grooves receiving therein and therearound a single strand of bowstring material to form a bowstring comprised of a plurality of strands extending between said stringer pins, said bar having a plurality of longitudinally extending openings formed therein adjacent one side of said block, a spreader device for flexing said plurality of bowstring material on each side of said stringer pins away from each other, respectively, said spreader comprising an elongated rod having one of its ends selectively engageable within one of said last named openings an elongated cross-brace fixedly secured intermediate its ends to the other end of said rod, and means on each end of said cross-brace insertable between said plurality of strands on each side of said stringer pins for flexing said strands away from each other.

8. A jig for making an archers bowstring comprising an elongated substantially rectangular base, an elongated substantially rectangular bar superimposed on said base in longitudinal sliding relation relative thereto, said base having a plurality of longitudinally spaced openings extending transversely therethrough adjacent one end thereof, said bar having a longitudinally extending slot extending transversely therethrough, a screw extending through each of said openings and said slots, a wing nut for each of said screws, said screws and nuts cooperating to releasably secure said bar to said base in a preselected position relative thereto, a substantially rectangular block fixedly secured to the ends of said base and bar remotely disposed with respect to each other, a stringer pin for each of said blocks, said stringer pins having one of their respective ends fixedly secured to their respective associated blocks, each of said stringer pins having a circumferential groove formed therein adjacent their other respective ends, said grooves receiving therein and therearound a single strand of bowstring material to form a bowstring comprised of a plurality of strands extending between said stringer pins, said bar having a plurality of longitudinally extending openings formed therein adjacent one side of said block, a spreader device for flexing said plurality of strands of bowstring material on each side of said stringer pins away from each other, respectively, said spreader comprising an elongated rod having one of its ends selectively engageable within one of said last named openings, an elongated substantially rectangular cross-brace fixedly secured intermediate its ends to the other end of said rod, means pivotally mounted on each end of said cross-brace insertable between said plurality of strands on each side of said stringer pins for flexing said strands on each side of said stringer pins away from each other.

9. A jig for making an archers bowstring, as defined in claim 8, wherein said last named means comprise a substantially rectangular strut having grooves formed in the opposed ends thereof to receive portions of said plurality of strands on each side of said stringer pins therein.

10. A jig for making an archers bowstring, as defined in claim 9, and means for securing said struts in a preselected, pivoted position, relative to said cross-brace.

11. A jig for making an archers bowstring comprising an elongated substantially rectangular base, an elongated substantially rectangular bar superimposed on said base in longitudinally extending relation relative thereto, said base having a plurality of longitudinally spaced openings extending transversely therethrough adjacent one end thereof, said bar having a longitudinally extending slot extending transversely therethrough, a screw extending through each of said openings and said slot, a wing nut for each of said screws, said screws and nuts cooperating to releasably secure said bar to said base in a preselected position relative thereto, a substantially rectangular block fixedly secured to the ends of said base and bar remotely disposed with respect to each other, each of said blocks having a socket formed therein, a stringer pin for each of said blocks said stringer pins having one of their respective ends fixedly secured within said socket formed in their respective associated blocks, each of said stringer pins having a circumferential groove formed therein adjacent their other respective ends, said grooves receiving therein and therearound a single strand of bowstring material to form a bowstring comprised of a plurality of strands extending between said stringer pins.

References Cited in the file of this patent UNITED STATES PATENTS 2,508,521 Lay May 23, 1950 2,815,638 Curtiss et a1. Dec. 10, 1957 2,817,206 Schwartz Dec. 24, 1957 OTHER REFERENCES Archery, vol. 27, No. 11, November 1955.

Pages

12, 13, 20, and 24 are pertinent.