US2813818A

US2813818A - Method of making a demountable bow

Info

Publication number: US2813818A
Application number: US525418A
Authority: US
Inventors: Pearson Ben
Original assignee: Ben Pearson Inc
Current assignee: Ben Pearson Inc
Priority date: 1955-08-01
Filing date: 1955-08-01
Publication date: 1957-11-19
Anticipated expiration: 1974-11-19

Description

Nov. 19, 1957 B. PEARsoN 2,813,818

METHOD OF MAKING A DEMOUNTABLE BOW FIG2.

Filed Aug. l, 1955 FIGS. F|G.4.

-FlGlog INVENToR, BEN PEARSON www 2,813,818 NIETHOD OF MAKING A DEMOUNTABLE BOW Ben Pearson, Pine Blulf, Ark., assignor to Ben Incorporated, Pine Bluff, Ark., Arkansas Application August 1, 195s, serial No. 525,418 s claims. (ci. 154-110) This invention relates to certain new andl useful improvements in demountable bows Pearson, a corporation of and methods of making same, and in particular relates to a method of forming demountable bows to adapt same for removable fitting into standardized sockets of bow handles. l

It is herein contemplated that demountable bows be formed by detachably joining the opposite limbs of the bows, preferably through the medium of a handle. In fabricating the present bow, due to a wide variety in handles, as well as in the structure of the bow limbs,

careful shaping of the butt ends of the bow limbs so as -to tit within a desired handle, has impeded the manufacture of the demountable bows on a commercial `basis and has involved considerable time and labor-consuming efforts as well as frequent waste from spoilage, as for example in the case of reducing the butt end of the bow limb to such a size as to fail proprely to iit snugly the desired handle.

The present invention relates to a -demountable bow comprising a pair of independent bow limbs, each limb having a somewhat tapered distal butt end, the said tapered butt ends being removably inserted in complementarily tapered sockets formed in a handle structure and being retained therein for use under the tension influence of the bow string when the assembled bow has been strung or brace The present invention further relates to the formation of bow limbs of any suitable or desired material or a combination of materials, including a tapering distal butt end, subsequently applying to such tapered butt end glass fiber wet with a suitable thermo-setting plastic such as one of the polyesters or one of the phenolic plastics, with a sufficient quantity of glass fiber and thermo-setting plastic being applied to the limb a suitable mold, subsequently molding the glass fiber and plastic to the limb butt end in an enlarged tapered shape of standard size and adapted accurately and closely to t a tapered socket of a bow handle.

The principal object provide a new and novel method of processing bow limbs to adapt same for use in demountable bows.

A further object of the invention is to provide such a method in which glass fiber and thermo-setting plastic butt to substantially ll of the present invention s to are applied to the butt end of the bow limb and are -I molded together to form an enlarged handle butt for insertion in a socket of a bow handle.

A further object is to generally improve the e1`n`ciency and utility of methods for producing demountable bow structures.

The means by which the foregoing and other objects of the present invention are accomplished and the manner of their accomplishment will readily be understood from the following specification upon reference to the accompanying drawings, in which:

Fig. l is a side elevational view of a braced demountable bow embodying the present invention.

Fig. 2 is an enlarged fragmentary elevational view of the handle or butt end of a limb.

vsection 19 converges 2,813,818 Patented Nov. 19, 1957 Fig. 3 is a view similar to Fig. 2 illustrating one form Vo f applying ber glass and thermo-setting plastic to the limb butt.

Fig. 4 is a view similar to Fig. 2 of the limb butt shown in Fig. 3 after processing.

Fig. 5 is a fragmentary side elevational view broken away for purposes of illustration. f Fig. 6 is a fragmentary front elevational view with with parts ,.partslbroken away for purposes of illustration. 10.,

.vH-vn .native use` in the process of the present method.

Referring now to the drawings in which the various 19 terminating is assembled by the opposite open verge toward the free lines substantially parallel with the sides of riser section 23. It will be observed co-planar with limb back 25, and it will be observed that butt section 15 is a tapered section having its smaller dimension at its distal or free end.

Similarly lower limb 17 includes a riser section 29 in which the belly 30 diverges away from the back 31 of the lower limb, reaching maximum divergence substanthe opposite portions converge toward the distal or free end of butt section 19. It will be observed that the back of butt section 19 is substantially coplanar with limb back -31 at their point of junction and that the belly of butt toward the butt back.

-Handle 21 comprises an inner hollow sleeve 33, preferably formed of metal or other suitable rigid material, to which is bonded an intermediate layer 35 as of a suitable thermosetting plastic and preferably the exterior of plastic layer 35 is enclosed with an outer covering 37 which may be formed of leather, fabric or other suitable material. Preferably handle 21 is relatively compressed intermediate its length and enlarges outwardly toward its opposite ends providing a convenient hand grip for use in handling the bow in shooting.

Internally hollow sleeve 33 similarly flares outwardly .are lshaped complevposite ends of the Vare wet or covered,y with a mentarily to the

tapered butts

15, 19 and are respectively adapted to receive the said butts when inserted during assembly of the bow. When so inserted

butts

15, 19 respectively snugly tit within the tapered sockets Yof the handle 21 with 'the distal or free ends of the respective butts in slightly spaced relation. Preferably handle 21 is of a length to substantially completely cover the respective butts so that when the bow is assembled the op handle 21 are positioned substantially at the junctions of limb 13 with butt 1S and of limb 17 with butt 19. When so positioned and the bow is braced by engaging the opposite loops of bow string 11 with notched tips 14, 1S the tension of the bow string is such as to retain the respective bow limb butts engaged with the handle against accidental or undesired separation. It will be seen that the distal ends of the butts are spaced apart within the handle, minimizing the possibility of undue shock during shooting of the bow. It will further be seen that the tapered snug t of the limb butts in the handle sockets affords a snug engagement, minimizing and substantially preventing looseness, creaking or rattling as the bow string is drawn and released during shooting of the bow- It has further been found that the manufacture of demountable bow assemblies of the type just described is greatly facilitated from a commercial point of view when standardized parts can be employed. This has proven particularly diiiicult, especially in the case of bows formed of wood or of wood combinations in which the wooden material is shaped as by cutting, planing or similar operations to desired size and shape. Owing to variations in the size and shape of bow limbs, particularly with respect to variations in the weight or draw of the bow; various sizes of handles have been used and at times it is necessary to specially construct a handle to accommodate the limb butt dimensions after fabrication of the limbs.

The present invention, therefore, further contemplates utilizing standardized handles 21 which may be prefabricated and stored in substantial quantities awaiting use in commercial production of bow limbs, and in order to permit the use of such stored and prefabricated handles, preferably

butts

15, 19 are additionally processed after shaping to substantially iinal form. In this processing elongated glass or other suitable fibers or material 38 suitable thermo-setting plastic snch as one of the polyesters or a phenolic plastic and the fibers as thus wet are applied to the butt section of the respective bow limbs, which application preferably is accomplished as Vby spirally wrapping the butt therewith in manner indicated in Fig. 3, the wrapping being continued until the `butt section has been `built up to a desired size so as to substantially fill a socket of a hollow vsleeve 33 or a similar device. butt section is to be molded and set under heat and pressure so vas to it the socket of the handle sleeve 33 with which itis to be used. In one embodiment of the 'invention the built-up butt sections are directly inserted Preferably the built-up -in the sleeve 33 with which it is to be used. Induction about the exterior of the

metal limbs

13, 17 are maintained in coil means C is wound sleeve and the opposite 'proper and exact alinement with the handle sleeve under `an appropriate pressure which may be applied bythe 'travelling vise means V, as schematically shown in Fig. 8. Heaty is applied to the metal sleeve 33 by'rneans ofinduction coil C, thermally setting the plastic of the built-up layer, bonding thev glass fiber and plastic to the limb-butt, thus building up the butt with a layer L of applied rglass 'fibel and plastic to form an enlarged butt 115. havingl an exact molded size to iit a tapered socket, of asleeve 33 of a handle 21. Similarly butt 1-9 andthe fiber and ,plastic applied thereto isprocessed toproduce an: enlarged handle-socket-tting butt 119 having a fiber and plastic layer L. When the setting of the built-up buttsections has been completed induction means C may be removed from the sleeve 33v and the sleeve and processed limbs removed for completion as by the application of layer 25 and cover 37 to sleeve 33 in order to complete the handle 21.

In the alternative a sleeve 33, or a device substantially duplicating sleeve 33, may be permanently mounted in conjunction with coil C and travelling vise V or other suitable pressure and alinement means and upon completion of the processing of the limb butts the formed butts maybe removed from the sockets of the sleeve and are adapted for insertion and mounting in a substantially identical sleeve member, accomplishing the same result. If desired the molding of the butt sections may be accomplished through the employment of a conventional-type mold M which is preferably a divided mold having suitable complementary sockets formed in the respective halves of the mold, which, upon closure of the mold, form a chamber dimensioned and shaped substantially identically with the interior dimensions and shape of a tapered socket of a sleeve 33 'of a handle 21.

It will be observed that butt is tapered toward its free or distal end and away from limb riser section 23 similar to the taper heretofore described for butt 15, in that butt belly 126 converges toward butt back 127 and the sides of butt 115 also converge. Butt 119 is a similarly tapered section. Enlarged butts 11S, 119 are inserted in the sockets of a handle and snugly fit therewithin, the plastic and iiber layers engaging the interior of the sockets. As previously described, the distal ends of the butts are spaced apart longitudinally within the handle, minimizing shooting shock.

It willv be understood that while

bow limbs

13, 17 have been here shown as integral, such is illustrative only and that vthe present invention may be applied to bow limbs regardless of the material of which the limbs are formed.

I claim:

l. A method of fabricating limbs for use with handle means vto provide demountable bows which comprises 'shaping bow material to form a bow limb having a butt section at one end, wetting glass fibers with a thermosetting plastic, applying said glass fibers after wetting to said butt section onlI and heat molding said butt section and applied liber and plastic into the shape and size of the interior .of the handle means to be used therewith to provide said butt section only with an exterior superposed, handle-fitting layer of plastic and glass liber.

2. A methjod 'in accordance ywith claim 1 in which said 'wet glass 'beris applied to said butt section by spirally winding said fibers on said section.

3. A method in accordance with claim l in which said-butt section is shaped to taper toward its free distal end.

4. The'method of' fabricating demountable bows which comprises the steps of shaping bow material to form a pair of independent bow limbs, each having a tip at one end and a butt section at the other end, shaping said butt sections to taper away from said tips to the free ends of said butt sections remote vfrom said tips, wetting glass `iibers with thermo-setting plastic, applying said glass ii-bers after wetting to each said butt section to substantially uniformly build up an exterior layer of glass fiber and plastic surrounding said butt section only, forming a handle having oppositely open hollow sockets, molding said butt sections and layers to snugly lit said sockets, and subsequently inserting said butt sections and layers to seat in said sockets.

55. A method ottabricatins means to provide demountable bows which comprises the steps of shapingl bow material to forma bow limb and a butt section of minor length relative to said limb integrally connected to. said, limb, wetting fibers -with a thermosetting plastic, surrounding said butt section withl a layer of substantially uniform thickness. formed of said fibers wet with said plastic, confining said layer to said butt section to prevent application of said fiber and plastic limbs for use with handle layer to said limb, shaping said layer to the size and shape of the interior of said handle means and applying plastic-setting heat to said butt section and said surrounding layer while maintaining uniformity of layer thickness to bond to said butt section only an exterior, substantially uniform, superposed layer of thermally set plastic and ber of a size and shape to tit said handle means.

References Cited in the le of this patent UNITED STATES PATENTS FOREIGN PATENTS Great Britain Aug. 4, 1949

Claims

1. A METHOD OF FABRICATING LIMBS FOR USE WITH HANDLE MEANS TO PROVIDE DEMOUNTABLE BOWS WHICH COMPRISES SHAPING BOW MATERIAL TO FORM A BOW LIMB HAVING A BUTT SECTION AT ONE END, WETTING GLASS FIBERS WITH A THERMOSETTING PLASTIC, APPLYING SAID GLASS FIBERS AFTER WETTING TO SAID BUTT SECTION ONLY AND HEAT MOLDING SAID BUTT SECTION AND APPLIED FIBER AND PLASTIC INTO THE SHAPE ANDD SIZE OF THE INTERIOR OF THE HANDLE MEANS TO BE USED THEREWITH TO PROVIDE SAID BUTT SECTION ONLY WITH AN EXTERIORR SUPERPOSED, HANDLE-FITTING LAYER OF PLASTIC GLASS FIBER.