US2828965A

US2828965A - Arrows and darts

Info

Publication number: US2828965A
Application number: US512543A
Authority: US
Inventors: Schwitzki Elvino
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-06-01
Filing date: 1955-06-01
Publication date: 1958-04-01
Anticipated expiration: 1975-04-01

Description

April 1, 1953 E. SCHWITZKI. 2,828,965

mows AND: DARTS Filed June 1, 1955 IN VEN TOR. E1. w/m 5211M rzk/ ARROWS AND DARTS Elvino Schwitzki, Buenos Aires, Argentina Application June 1, 1955, Serial No. 512,543

2 Claims. (Cl. 273-1065) This invention relates to improvements in arrows and darts, and more particularly to certain improvements for directing said arrows in flight after having been released from the bow.

Known arrows are fletched either with feathers or with longitudinal blades made from wood or plastics. In both these cases it is difficult to properly fletch an arrow, as an accurate fletching is rather difficult to obtain.

One important object of this invention is to provide means substituting the usual fletching by means contributing to a more economical arrow structure and to secure at least such great accuracy as the conventional fletching does.

Another object of the invention is to provide means imparting to the arrow device directional guidance for use in target, hunting and field arrows.

A further object of the invention is to provide means conducive to a good gripping location to take the arrow when placed in the bow and inserted in the string.

Another object of the invention is to provide means affording an arrow structure having no protruding directional means.

The invention essentially consists in providing arrows, in the place where conventional feathers or the like are fietched, with at least three longitudinally depressed areas or curved flutes or recesses of elongated elliptical form and symmetrically arranged around the axis so as to give it a polygonal section in the place corresponding to the middle of the recesses.

In order to provide a better understanding of the invention, a preferred form of embodiment will be described hereinafter with reference to the accompanying drawings, in which:

Fig. 1 is a lateral view of both the ends of an arrow, showing the recesses made in the place of the ordinary fletching.

Fig. 2 is a cross-section of the arrow shown in Fig. 1, taken along line A-A.

As it will be seen, the arrow-shaft 1, which comprises the conventional pointed end 2, conventional end 3, and nock or notch opening 4, presents at the place where the usual fletching is made, three elongated depressed areas or recesses 5, formed each, for instance, by removing material from said shaft 1 along a shallow curved plane. These three recesses are disposed symmetrically with respect to the axis of shaft 1 so as to provide it with a triangular section at the central part of the shaft taken through the recesses, as shown in Fig. 2.

It has been found that the said recesses advantageously contribute to a function approximating ordinary feather fletching or wings. When the arrow is in flight, apparently air presses against the fiat or shallow curved bottom of the recesses so that the arrow moves in the desired direction.

The recesses may be made more economically and easily than the usual fletching, and present the advantage that they are not subject to deformation or damage as the ordinary fletchings are. Furthermore, as there are no pronited States Patent truding parts on the arrow, when same travels while still in contact with the how, the arrow according to the invention is not subject to deviations which ordinarily are provoked by feathers or wings.

The recesses may be in number greater than three but they must by symmetrically arranged in the rearward part of the arrow. The recesses maybe made by cutting them off from the Wooden shafts of arrows or by recesses into the arrows if made from plastics.

It will be seen from the aforesaid disclosure that the arrow structure has a shaft of substantially equal diameter throughout and provided with a pointed piece at one end and with a nock at the other end, and at least three elongated recesses symmetrically grouped about the axis of said shaft, and located adjacent said nock end, each of said recesses being relatively shallow and defined by end edges converging to the surface of said shaft, the extremities of said end edges of each recess being positioned on said shaft surface, said extremities of said respective end edges lying along a line parallel to the shaft axis, the cross section at the center part of said recesses forming a substantially equi-lateral triangle.

Having thus fully described my invention, what I claim as new is:

1. An arrow structure for use in archery; comprising an elongated shaft of substantially equal diameter throughout its length and provided with a pointed end piece at one end and with a nock at the opposite end and integral with said shaft, at least three elongated depressed areas located in the shaft and symmetrically grouped about the axis of said shaft, said depressed areas being defined by longitudinal edges and extending in longitudinal direction of said shaft starting at a location spaced a predetermined distance from said nock and reaching for a relatively short .distance in the direction of said pointed end piece, the

Width of each depressed area being greatest at approximately the center part thereof and terminating short of the outer surface of said shaft to thereby leave unaffected respective shaft portions disposed between said longitudinal edges of adjacent depressed areas, each of said depressed areas being bounded at each end by said longitudinal edges which converge toward the surface of said shaft with the intersection of said edges lying in a plane which passes through the axis of said shaft, the cross-section of said shaft at said center parts of said depressed areas forming a substantially equilateral triangle.

2. A structure for an arrow, dart and like elongated element; comprising an elongated shaft of substantially equal diameter throughout its length and provided with a pointed end piece at one end thereof and with a neck at the opposite end, elongated symmetrically grouped, longitudinally extending depressed areas provided adjacent the neck and integral with said shaft, said depressed areas being disposed about the axis of said shaft and spaced a predetermined distance from said neck and extending a relatively short distance in the direction of said pointed end piece, the width of each depressed area being defined by longitudinally extending marginal edges and being greatest at approximately the center part of said depressed area, said width extending in transverse direction with respect to the shaft axis and terminating at a predetermined distance from the outer surface of said shaft to thereby leave unaffected respective shaft portions which are confined between said marginal edges of adjacent depressed areas, said marginal edges of said depressed areas converging at each end thereof toward said outer surface of said shaft, said unaffected shaft portions adjacent said center part of said depressed areas being of smaller width than said unaffected shaft portions adjacent said converging marginal edges.

(References on following page) 3 4 References Cited in the file of this patent 2,540,079 Ferguson Feb. 6, 1951 UNITED STATES PATENTS 2,531,884 Rmg l 1952 1,162,200 Winans NW 30) 1915 2,599,626 G s h lk n 0, 1952 1,328,967 Reaben -2 Jan. 27, 1920 1,907,273 Umling May 2, 1933 OTHER REFERENCES 2,209,672 Boggs July30, 1940 Archery, The Technical Side, North American Press,

2,484,589 Richards Oct. 11, 1949 1947, pp. 82, 83.