US2212345A - Arrowhead - Google Patents

Description

R. S. KRIEGER Aug. 2o, 1940.

ARROWHEAD Filed Sept. 12, 1938 6 ttornegs @47 gi/wegen f1! W PuenteaAug. zo, 1940 UNITED sTATEsf PATENT oFFlcEf Amwwnnan Ralph S. Krieger, St. Clair IShores, Mich.

Application september 12. 193s, seal No. 229,405

V 1 claim. `(ci. '21a-106.5)

This invention relatesgenerally to arrows and more particularly to arrowheads.

the past, arrowheads have been provided which usually have a pair of radially spaced l blades or wings and it has been found that-this type of arrowhead presents little resistanceto cross air currents with the result that the arrow is deviated by cross air currents from its true course of night. l Consequently, it is the principal object of the present invention to provide an arrow of a character which will result in its more nearly following a true course of flight.

More specifically it is an object of the invention ll to provide an arrowhead which during ight of the arrow will impart positive rotation to the arrow and in so doing oppose cross air currents which otherwise would deflect the arrows flight.

Other objects of the invention will become ap- I parent from the following description taken in connection withthe accompanying drawing, in which- Figure 1 is a view of an arrow embodying my invention; v

Fig. 2 is an end elevational view of the arrow; Fig. 3 is a fragmentary view of an arrow having a different vtype of head;

Fig. 4 is another type of arrow having the improved arrowhead, and

Figs. 5 and 6 are views of a harpoon type of arrow.

Referring to the drawing by characters of reference, and first to Figure 1, the numeral l0 designates angarrow shaft on one end of which my improved. arrowhead, as at II, is secured, the other end of the shaft I0 having the usual slot I2 to receive the cord (not shown) of a bow and having the usual feathers I3. The arrowhead I I includes a shank I4 which is preferably internally threaded to screwthread onto. the shaft I0 which is provided with a reduced threaded end portion I5 whereby various types of arrowheads may be interchangeable on the shaft.

As shown in Fig. 1, the arrowhead II is provided with a plurality of equally spaced integral wings or blades I5 which are triangular in shape having rear or trailing edges I1, the wings tapering from their trailing edges to a penetrating point I8 which is coincident with the longitudinal axis of the shank I4 and shaft I0.

In order to provide an arrow which will oppose or resist deflection by air currents, the blades Il are arranged at a slight acute angle or are spiral with respect to the longitudinal axis of the shank I4 or such that the trailing edges I1 are slightly oi! center as shown in Fig. l. During flight of the arrow, the offset blades Il cause the arrow to rotate and oppose cross air currents with the result that the arrow keeps' more nearly to the mark than would otherwisebe the case.'Prefer ably, the arrowhead is made of some suitable l light weight material, such as, aluminum andthe heads are 'preferably cast. lf desired, the tip or point as at I8a of the arrowheads may be formed of a hard metal such as steel which may be cast integral with the otherwise aluminum head. To l0 reduce air friction lthe longitudinal edges of the wings or blades are sharpened .to knife edges.

While the spiral arrowhead blades I6 will alone impart rotation to the arrow. during its night, I also prefer to arrange the feathers I3 at an angle Il to the arrow shaft I0 or spirally arranged on the shaft toalso act with the head to rotate the arrow, the feathers being arranged at substantially the same angle as the blades I6. With thisl arrangement, it will be understood that the appli- I cation of forces acting at both ends of the arrow shaft tend to keep the arrow on a true course of flight. l.

In Fig. 3 there is shown a different. type of head I9.' having a shank 2li provided with a 25 'pointed end 2l suitable for target practice. The

head I9 does not have wings or blades but it will be seen that the arrowheads I I and I9 are readily interchangeable. In Figs. 4, 5 and 6 are shown arrows which are adapted for shing, these ar- 30 rows having, metallic tubular shafts 22 through which the fish cord or line 23 extends and is secured to the arrowhead. Figs. 5 `and 6 show a harpoon type of arrow whereas Fig. 4 shows an arrow having a head which is the same as the ar- 35 rowhead of Fig. l. The arrowheads of Figs. 4,

5 and 6 have a tubular shank 24 in which a transversely extending pin 25 is` secured and to which the cord 23 is attached by means of a swivel '26 to prevent tangling of the cord. The 40 harpoon arrow o f Figs. 5 and 6 has a harpoon type of point 21 which is pivoted to the shank 24 by a pivot pin 28. The plv'oted point 21 has an arm 30 and on entering an object pivots to a position transverse to the shank and shaft 45 to oppose withdrawal of the arrow.

What I claim is:

An arrowhead comprising a cast aluminum shank having a plurality of integral and equally spaced triangular wings tapering from their trailing' ends to a steel metallic point cast integral with the head, said wings extending fromA their trailing ends at an angle to the longitudinal axis of the shank to provide for rotation of an arrow during flight.

RALPH 8. KRIEGER.

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