US106649A - Improvement in manufacture of shears - Google Patents

Description

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WILLIAM B. BARNARD-`ANDAANDREW J. BARNARD, OF WATERVILLE, CONNECTICUT.

Letters Patent No. 106,649, dated August 23,1870.

IMPROVEMENT IN MANUFACTURE OF-SHEARS.'

."The Schedule freferred to in theseLetters Patent; and making part o! the same We, W1LL1AM B. Bauman and ANDREW J. BAR- NARD, of Waterville, in the county of New Haven and State of Connecticut, have. invented certain I m lnovenients in the Manufacture et' Shears, ot' which the following is aspecitication.

Our invention consists oi `improvements in the means-of securing the handles oi' shears to their blades, said improvements being applicable not only toV those classes of she'ars in which the handles a-rc separately formed preparatory to their attachment to the blades, but also to those in which the-handles are cast upon the blades by the process described in the Letters Patent No. 737, granted to George Ropes, May 10, 1838.

The iii-st part of our invention relates to the overlapping of the side edges of that portion of the tang ot' the blade, which is inselted in a recess in the han'.- dle by means of projections `from the strips on either side ot' said recess. A

Recesses or notches are formed in or upon the side edges of the tangs into which the'metallic projectionsare hammered down or upset, it' the handle is first formed separately, or made to flow when the handle is cast upon the `tang in a molten state, the object of our invention being to avoid entirely the necessity ot' pertbrating the tang 'to receive a rivet, as such perforation i.of the `tang to receive a rivet often causes the tang to crack or break in securing the handle thereto, and produces a consequent loss of thestock, and also to do away entirely with the useof a rixet in the joint, which, it' made ho`mogencous with the handle, -is often. found defectivein the casting, causing a loss of stock; or, it` made loose, is expensive iu manufacture and use.

Our invention relates, in the second place, to the forn'iation of a small recess in the under sid/e ot' the end ot' the tang to receive a counterpartteat or projection on the end of the handle within the recess which receives the talig, our object being to retain an advantage of a rivet, viz: retention ot' the blade in the handle in such manner as to prevent thebladc j iron) sliding ofi' of the tang, either longitudinally or laterally, withoutthe disadvantages which result from a perloration ofthe tang, and the torinationot' a-rivet to lit therein.

In the accompanying drawing- Figure l is a plan view ot the handle, and

Figure 2,21. plan view of the blade otf one loi' vthe halves or divisions of our improved shea-rs.

Figure is Va longitudinal section in the line rca., and 'Y v Figure 4, aftransverseV section in the line y' y. of fig. 1.

Figure 5 is a `plan'ot' the handle and blade unit-ed. Figures 6 and 7 are plan views,respectively, ota

handle and blade det-ached, illustrating a modificationy The tang b is beveled oi' or recessed on each side on its upper egde, as shown at s s, iig. l, and pr'ojections f f are formed upon each edge ot' the recess in the handle to correspond with the recesses s s of' the tang, so that, when thetang b is fitted into the recess ct, the projections f f on either side may c hammered down -to overlap and fill up the recesses.

s s, which, ii'oin their peculiar shape, will then serve to retain'and hold the blade securely upon the end oll the handle without further fastening, as shown in iig. 5.

In Vsome cases we also bevel off the end of the talig on its upper side, and hammer down thereinto a projection left on the upper end ot' the recess, as illustrated by dotted lines ,in the'trst tive tiguresot' the drawing, vand we contemplate making a projection entirely around the edge of the recess, either continuons or broken, to be'hannnered down, as described, to overlap the tang on allthree sides.

Vhcre a` yet stronger fastening ot' the handle to the bla-de is .desir-ed, we not only forni recesses, as described, in the edges of the tang, on each side thereof', but we serrate the sides ot' the talig, (see tig. 7,) and form ,counterpart serrations in the sides of. the recess ,in the handle, (see iig'. 6,) sol that, when the one is titted into the ot-her, a compound dovetaii jointis formed between the two.-

The sides of the recess iu the handle are provided with theprojections f f, as heretofore described,

which, when beaten down or upset into the beveled recesses in the edges ofthe talig, to overlap the Sallie, complete and secure the joint.`

Where the edges ot' the tang are not serrated, as just described, and as illustrated in tigs. 6 and 7, a short teat or lug, d, may be cast in the tace or bottom of the recess a, as shown in iigs. l, 3, and 4, and a counterpart recess be formed in the under side ot' the tang to tit thereon. i i

This lug and recess, in combination with thc-overlapping edges ofthe recess, t'orln as strong and 4secure a joint as that obtained by means ot' rivets passing wholly through the tang without the loss attendant upon the. use of the latter.

We claim as our invention- 1. In the' construction .of shears, scissors, &c., a blade, secured to its handle by mea-ns of projections 'upon the edges of the recess formed-to receive the .tang of the blade, made. to overlap the edges of the tang, which are. recessed or beveled for thc purpose, substantially in the manner hereinset; forth.

2. In combination with the overlapping edges of the recess in the handle, made to secure the edges of the tang of the blade of a pair oi' shears, as de- Witnesses zv XVM. W. BONNETT, J. NV. WEBSTER.

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