US3583380A - Archery bow limb tip construction - Google Patents

Abstract

A bow tip construction having a pair of elements having the geometry of a string nock performed thereon. One of the elements includes a pair of laterally opposed bosses which are adapted to extend through a pair of notches formed in the end of the bow and register with a pair of notches formed within the other element. The elements are then secured to both sides of the bow end with the end of the bow sandwiched therebetween.

Description

United States Patent Richard S. Karbo Whittier, Calif. 844,848

July 25, 1969 June 8, 197 1 The Leisure Group, Inc. Los Angeles, Calif.

inventor Appl. No. Filed Patented Assignee ARCHERY BOW LIMB TIP CONSTRUCTION 6 Claims, 5 Drawing Figs.

U.S. Cl 124/23, 124/30 Int. Cl F41b 5/00 Field of Search. 124/23, 22, 21, 24, 41

E i t t [56] References Cited UNITED STATES PATENTS 2,844,136 7/1958 Folberth 124/23 3,010,445 11/1961 Gruss 124/23 3,085,561 4/1963 Childress 124/23 Primary ExaminerRichard C. Pinkham Assistant Examiner-William R. Browne Att0mey.lackson and Jones ABSTRACT: A bow tip construction having a pair of elements having the geometry of a string nock performed thereon. One of the elements includes a pair of laterally opposed bosses which are adapted to extend through a pair of notches formed in the end of the bow and register with a pair of notches formed within the other element. The elements are then secured to both sides of the bow end with the end of the bow sandwiched therebetween.

PATENTED U 8 I971 INVENTOR.

ARCHERY BOW LIMB TIP CONSTRUCTION BACKGROUND OF THE INVENTION l. Field of the Invention The present invention relates to archery bows, and more particularly to the tip construction of such bows.

2. Description of the Prior Art A conventional bow usually includes upper and lower limbs integrally joined together by a handle portion and extending outwardly therefrom. Each of the limbs terminates at an end formed to include a central tip portion extending in a generally longitudinal direction and terminating at its outer end in a rounded tip and at its inner end in a string nock. The string nock extends transversely across the front face of the bow, around the sides thereof and into a Y configuration on the back face of the bow. A bow string having loops formed at both ends thereof is attached to the ends of the bow by flexing the bow and pennitting the loops to extend over the transverse and side grooves of the nocks and inwardly along the diagonal grooves thereof. The bow string, therefore, lies in the same plane formed by the limbs of the bow at any flexed or unflexed position.

It is very important that the grooves of the nocks be precisely located on the tip portions of the bow, for if these grooves are misaligned in any manner, undesirable forces are generated on the entire construction of the bow. For example, if the side grooves of the nock extend unevenly into the tip portion of the bow, the bow string would be located off center of the bow end and would lie outside the plane formed by the bow limbs. As a result, the tensile forces acting on the bow ends by the string would create a resultant force acting in a direction without the above-mentioned plane, thereby creating a twisting force on the limbs which could be damaging to the bow structure. Furthermore, such a harmful torque creates unequal stresses on the loops of the string which could eventually lead to premature breakage thereof. Moreover, if the string is not centered in the same plane as that formed by the bow, the string will tend to pull the arrow to the one side, thereby seriously effecting its accuracy.

Although conventional bows have been in use for hundreds of years, this severe misalignment problem has not been solved. The underlying reason that this problem has not been solved lies in the fact that the tips of the bows are still handformed. Under conventional manufacturing methods, the bow tips are usually cut to shape first and then the grooves are formed by hand filing. The problem with such a hand filing process is that the element of human error is always present. As a result, the geometry of the string nock is always dependent on the skill and accuracy of the individual worker.

SUMMARY OF THE INVENTION This invention obviates the above-mentioned shortcomings by providing a bow tip construction having the geometry of the nock established in a molded or preformed part that is adapted to be rigidly secured to the ends of the bow. Each tip construction includes a first element having a back face with a pair of diagonal grooves in the shape of a V formed thereon. A pair of laterally opposed bosses are also formed on the element and extend forwardly from the back face thereof and include a pair of side grooves formed therein. A second element is provided having a front face with a pair of notches extending therethrough which are adapted to receive and register with the bosses of the first element. A transverse groove is formed on the front face of the second element and extends to both of the lateral notches formed therein.

In mounting the elements onto each end of the how, a pair of laterally opposed notches are formed at each end of the stock adapted to form the limbs of the bow. The first element is then mounted onto the end of the stock with the bosses extending into the notches and the interior side of the element lying flush with the back side of the stock. The second element is then positioned on the front face of the stock having its laterally opposed notches registering with the bosses of the first element. The two elements are then secured to the end of the stock with the end of the stock sandwiched therebetween. The tip of the bow, along with the face portions of the first and second elements, are then cut and finished to the desired shape. Upon securement, any excess portion of the bosses is removed to enable the ends of the bosses to lie flush with the front face of the second element.

As stated above, the main advantage of the present invention is that the diagonal, side and transverse grooves of the nock are established in the molded elements with the elements being easily sandwiched around the tip portion of the how by forming a pair of lateral notches therein. In this process, the grooves can be formed with a much greater accuracy and consistency than by hand-forming. As a result, any problem due to misalignment of these grooves is avoided.

Another advantage of the present invention is that the two elements can be sandwiched about any width of stock forming the limbs, thereby enhancing its universal application to all types and sizes of bows.

The features of the present invention which are believed to be novel are set forth with particularity in the appended claims. The present invention, both as to its organization and manner of operation, together with further objects and advantages thereof, may best be understood by reference to the following description, taken in connection with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view of a first element of a tip construction in accordance with the present invention;

FIG. 2 is an elevational view of the interior side of the first element having a pair of laterally opposed bosses;

FIG. 3 is an elevational view of a second element of the bow tip construction in accordance with the present invention;

FIG. 4 is a perspective view of one end of a bow stock having the first and second elements secured thereto; and

FIG. 5 is a perspective view of the combination shown in FIG. 4 in its finished form.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings, FIGS. 1 and 2 show a first element, generally indicated by arrow 10, of a bow tip construction comprising an arcuate plate 11 having a back face 12 and an interior face 13. A pair of diagonal grooves 14 in the shape of a V are formed on the back face 12 with the apex thereof adjacent the midpoint of an edge 15 and the legs extending diagonally to a pair of side grooves 16. As more clearly shown in FIG. 2, a pair of laterally opposed bosses 17 extend outwardly from the interior face 13 with the pair of side grooves 16 formed therein.

FIG. 3 shows a second element 20 comprised of a rectangular plate 21 having a front face 22 and an arcuate interior face 23 formed thereon. A pair of laterally opposed notches 24 are formed on the plate 21 and are of a sufficient size to register with and receive the pair of bosses 17. The front face 22 further includes a transverse groove 25, formed thereon ex tending between the innermost edges of the notches 24.

FIG. 4 shows a piece of stock 30 that is adapted to be shaped into a bow end. The stock 30 may be formed from any type of wood or material of high elasticity. The stock 30 may also be formed from a plurality of wood laminations which are bonded together. A pair of laterally opposed notches 31, identical to the notches 24, are formed within the stock at the one end thereof and are adapted to receive the pair of bosses 17 with the interior face 13 of the first element 10 lying flush with the back side of the stock 30. The second element 20 is positioned on the front side of the stock 30 with the interior face 23 lying flush therewith. In such a position, the notches 24 extend around the pair of bosses 17 and are interconnected therewith. The elements 10 and 20 are then bonded to the respective sides of the stock 30 by any conventional bonding means. It should be noted that the ends of the bosses 17 extend beyond the front face 22 of the second element 20 with the excess adapted to be removed to enable the ends of the bosses 17 to lie flush with the front face 22. After the excess is removed, the inner portions of the boss ends are faired with transverse notches corresponding with the groove 25 to provide a smooth groove about the periphery of the device.

it should be noted that because of the length of the bosses 117, the first and second elements and can be sand wiched by varying sizes of stock with the excess portion being removed each time.

After the first and second elements 10 and 20 are bonded to the stock 30, the combination is then cut and formed into the shape illustrated in H0. 5, with the upper portion of the tip construction tapered inwardly. ln its assembled condition, a string nock is formed by the diagonal, side and transverse grooves 14, 16 and 25, respectively. In such a construction a loop of bow string 40, shown in dotted lines, is then adapted to slip over the end of the bow end and become engaged with the string nock formed diagonal, side and transverse grooves l4, l6 and respectively.

As stated previously, an important advantage of the present invention is that hand forming operations are reduced to a minimum. All of the grooves are accurately and consistently preformed, preferably by a molding process. The only element of handwork is the faired notches on the ends of the bosses l7.

ln assembling the device, the only other operation necessary is to form the notches 31 in the stock 30. The necessary shape forming of the stock 30, along with the nock construction is carried out after the elements R0 and 20 have been secured thereto. As a result, a convenient and accurate means of forming bow tip constructions is achieved.

What I claim is:

l. The combination ofa bow and an attachable bow limb tip construction comprising:

a bow links nocked end having a front side and a back side;

a first element having an arcuate face with a pair of diagonal grooves in the shape ofa V formed thereon, said first element being secured to the back side said bow's nocked end with the grooves facing away from the bow; and

a second element having a face with a transverse groove formed thereon and facing away from the bow, said second element being secured to the front side of the bow end with said diagonal and transverse grooves cooperating to form a string nock for receiving a loop of how string, said first and second elements positioned on the same bow limb nocked end so as to sandwich the nocked end therebetween.

2. The invention in accordance with claim 1 wherein said first element further includes extension means interconnecting said first and second elements.

3. The invention in accordance with claim 2 wherein said extension means comprises a pair of laterally opposed bosses extending, inwardly toward the .bow tip adjacent the bow limb and through a pair of laterally opposed notches formed in the bow limb tip.

4. The invention in accordance with claim 3 wherein said second element includes a pair oflaterally opposed notches of a size and configuration to receive and register with said pair of bosses.

5. The invention in accordance with claim 4 wherein each of said bosses includes a side groove interconnecting and transverse groove with an upper end of one of said diagonal grooves.

6. The invention in accordance with claim 2 wherein said extension means further includes side groove means interconnecting said transverse groove with the upper ends of said diagonal grooves.

Claims (6)

1. The combination of a bow and an attachable bow limb tip construction comprising: a bow link''s nocked end having a front side and a back side; a first element having an arcuate face with a pair of diagonal grooves in the shape of a V formed thereon, said first element being secured to the back side said bow''s nocked end with the grooves facing away from the bow; and a second element having a face with a transverse groove formed thereon and facing away from the bow, said second element being secured to the front side of the bow end with said diagonal and transverse grooves cooperating to form a string nock for receiving a loop of bow string, said first and second elements positioned on the same bow limb nocked end so as to sandwich the nocked end therebetween.

2. The invention in accordance with claim 1 wherein said first element further includes extension means interconnecting said first and second elements.

3. The invention in accordance with claim 2 wherein said extension means comprises a pair of laterally opposed bosses extending, inwardly toward the bow tip adjacent the bow limb and through a pair of lAterally opposed notches formed in the bow limb tip.

4. The invention in accordance with claim 3 wherein said second element includes a pair of laterally opposed notches of a size and configuration to receive and register with said pair of bosses.

5. The invention in accordance with claim 4 wherein each of said bosses includes a side groove interconnecting and transverse groove with an upper end of one of said diagonal grooves.

6. The invention in accordance with claim 2 wherein said extension means further includes side groove means interconnecting said transverse groove with the upper ends of said diagonal grooves.

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