US 3108792 A
Description (OCR text may contain errors)
Oct. 29, 1963 MARTIN 3,108,792
FLETCHING JIG Original Filed April 30, 1959 FIG. l.
MARTIN United States Patent Ofiice 3,108,792 Patented Oct. 29, 1963 3,108,792 FLETCHING JIG Royce H. Martin, 13.0. Box 205, Uinatilla, Greg. Original application Apr. 30, 1959, Ser. No. 809,991, new Patent No. 3,015,483, dated Jan. 2, 1962. Divided and this application Oct. 12, 1961, Ser. No. 144,694 1 (ilaini. (Cl. 26938) This invention is a division of my co-pending application Serial No. 809,991, filed April 30, 1959, now Pat. No. 3,015,483 dated January 2, 1962.
One of the objects of the invention is toprovide a durable arrow positioning assembly including features which render the positive and accurate setting of the arrow shaft in the jig at the desired angular positions for placing the feathers thereon. In that connection it is proposed to provide novel indexing means all of whose parts are centered about the same axis and maintained in that relation without any substantial effect thereon by use, wear or accidental pressures on the manipulating handle, and which are also held at a selected setting by practical and reliable means.
With the above and other objects in view which will appear as the nature of the invention is better understood, the invention consists in the novel construction, combination, and arrangement of parts, hereinafter more fully described, illustrated and claimed.
In the accompanying drawings:
FIGURE 1 is a side elevation of a jig illustrating the present improvements.
FIGURE 2 is an end elevation of the improved indexing means taken on line 2 of PEG. 1.
FIGURE 3 is a vertical sectional view taken on the line 3-3 of FIGURE 2.
Similar reference characters designate corresponding parts in the several figures of the drawings.
Referring first to FIG. 1, it will be seen that the jig includes a base A, a first upwardly directed end wall 1 and a second upwardly directed end wall 2. The first end wall 1 is provided at its upper end with a notch or the like for receiving and supporting one end of the arrow shaft designated generally as B.
The second or lefthand end wall 2 (as viewed in the drawings) is provided with the improved arrow positioning assembly designated generally as C.
Referring to the assembly C of FIGS. 2 and 3, it will be understood that the offset portion 3 of the wall 2 is provided on its inner face 4 with an annular degree scale S which is identical to the scale S of FIG. 2 and whose axis coincides with an opening 5 which receives a shaft 6. The outer face 7 of the wall 3 is provided with a plurality of series of annular concentric keeper depressions 8 whose axes are radially aligned with a related degree mark on the scale Whose position is shown by dot and dash lines in FIG. 2 on the inner wall 4. These radial depressions may be arranged in appropriate groups as seen in PEG. 2, the depressions of each group being related to corresponding degree marks on the scale S, FIG. 2. For example, the depressions may begin at 0 and extend to any desired additional degree marks thereafter.
The shaft 6 has a nock receiving socket 14 at one end and a recess 12 at the other and is further provided with a transverse slot 9 which adjustably receives arm 10 having a groove 11 on its inner face into which the inner end of screw 16 fits to limit sliding movement of the arm and also to prevent said arm 10 from moving out of predetermined selected position, thereby assuring that ball 13 will be kept in true alignment so that the clamp D will place the feather, or the like, in an accurate and desirable selected place along the horizontal axis of the arrow shaft B, while the opposite face of arm 11 is set and held snug- 1y at the desired radius by the set screw 12. The head of the set screw is readily accessible through the open end of the recess 12 to tighten and loosen the arm 10 so that it may slide to enable the user to adjust the arm diametrically so that the outer end portion of the selector arm 10 carrying spring pressed ball 13 may fit into selected depressions 8 and thus hold the shaft 6 at the desired angular setting.
The inner end of the shaft 6 is formed, as previously indicated, with a socket 14 for concealing a nock-receiving clamp 15. This clamp is of substantially U-shaped formation, and its resilient arms are bent inwardly to frictionally engage the arrow shaft. The bottom of the nock clamp may be secured in the shaft independently of the cross pin 16 by a screw 16 whose inner end may extend into the groove 11 at the inside of the arm 10 to prevent sidewise movement.
The outer peripheral portion of the shaft 6 at the inner or scale face of the wall 3 has fixed thereto a hub having a pointer 17 held onto the shaft by cross pin 16. The hub and pointer 17 are movable over the face 4 and the scale indicated by dotted line S, FIG. 3, and identical to dot and dash lines S, FIG. 2, as shown in my Patent 3,015,483 to enable the operator of the jig to select, visually, the proper degree marks on the scale.
After the nock of the arrow is fitted in the clamp 15, the handle portion 6 of the shaft may be rotated through the desired angular distance for feather setting, according to the marks selected on the scale S. As the shaft turns, the ball 13 will be depressed sufficiently to be forced out of the depression in which it has been resting, and the shaft may be rotated until the ball strikes the next depression corresponding to the selected scale.
In connection with the depressions 8, it will be understood that if the pointer 17 is at zero and it is desired to set the feathers at an angle of it is only necessary to turn the handle portion of the shaft 6 until the ball 13 will come to rest at the 120 marking and subsequently at the 240 marking. By changing the position of the arm 10 in the guideway 9 of the shaft, the spring-pressed ball 13 will describe another annular path which includes a second set of depressions which will stop the shaft every 45 on the scale. As the arm 10 is moved to cause the ball to come closer to the axis of the shaft, it will be understood that the shaft is stopped at points on the scale of different angular distances from those described.
In a fletching jig, an arrow positioning assembly comprising, in combination,
an arrow supporting frame (A-j-l +2) including a nock supporting wall 3 having an opening 5,
a series of degree marks arranged radially to said opening on the outer face '7 of said wall 3,
a series of annularly disposed depressions 8 related to each of said degree marks, each series having a radius of different length also from the axis of said opening a shaft 6 journalled in said opening 5 and having a nock receiving socket 14 at its inner end and a recess 12a at its outer manipulating end, said shaft also having a radial slot 9 disposed at one side of the outer face 7 of the wall 3,
an arm 10 slidable in said radial slot 9 and having a spring pressed ball 13 at one end and also having a longitudinally disposed guide 11 on its face, and overlying the outer face 7 of said wall 3,
a screw 12 passing through the bottom of the nock receiving socket and having its inner end projecting into said groove 11 to guide the sliding movement of the arm 10 radial to the shaft 6,
. 3 4 and a set screw 12 in said recess 12a of the shaft and References Cited in the fiie of this patent having its inner end positioned for abutting engage- UNITED STATES PATENTS ment with the arm 10 to set the latter in a given 1 108 736 Frykman g 25 1914 POS1'E1OI1 m the slot 9 and the ball 13' 111 selected Scott Nov. 3, 1936 depression 5 2,897,860 Martin Aug. 4, 1959