US1080278A - Method of making nail-extractor jaws. - Google Patents

Description

W. F. HOBBS.

METHOD OF MAKING NAIL EXTRAOTOR JAWS. APPLICATION FILED JULY 15, 1913.

2 1,080,278. Patented Dec. 2, 1913.

\ W/T/VES8E8: l/WE/VTOR ,Jw By A TTOH/VEV WILLIS F. HOBBS, OF BRIDG-EPORT, CONNECTICUT.

METHOD OF MAKING NAIL-EXTRACTOR JAWS.

Specification of Letters Patent.

Patented Dec. 2,1913.

Application filed July 15, 1913. Serial No. 779,148.

To all whom 2'6 may concern:

Be it known that I, WILLIS F. Hones, a citizen of the United States, residing at- Bridgeport, county of Fairfield, State of Connecticut, have invented an Improvement in Methods of Making Nail-Extractor Jaws, of which the following is a specification.

This invention relates to the class of nail extractors described in patent to Sperry, No. 708,841, dated September 9, 1902, which shows a movable jaw and jaw lever formed from a blank of sheet metal. In the manufacture and use of nail extractors made under the said Sperry patent, serious objections have arisen to the movable jaws formed from sheet metal which I have overcome by forging a solid movable jaw and jaw lever from a bar.

My invention therefore has for its object to provide a method of making solid movable jaws and jaw levers, which shall be relatively inexpensive and will produce a combined jaw and jaw lever, having a box joint, and overcoming the objections to combined movable jaws and jaw levers made in the old way.

With this object in view I have devised the novel method of making combined jaws and jaw levers which I will now describe, referring to the accompanying drawing forming a part of this specification and using reference characters to indicate the several parts.

Figure 1 is an elevation of a nail extractor provided with my novel jaw and jaw lever; Fig. 2 an elevation illustrating the blank as formed from a bar by the first operation; Fig. 3 an edge view corresponding therewith; Fig. 4 an inverted plan view of the blank after the second operation; Fig. 5 an end view corresponding with Fig. 4; Fig. 6 an end view, Fig. 7 an elevation and Fig. 8 a plan view of the blank after the third operation, and Fig. 9 is an end view and Fig. 10 an elevation of the combined jaw lever and jaw as completed by the fourth operation.

The first operation consists in subjecting a bar of metal to the action of forging dies which blank out the member, form a depression 10 therein, form a groove 11 extending from the depression to the claw end of the blank and form a lug 12 upon the underside of the blank opposite the groove (see Figs. 2 and 3). The second operation (see Figs.

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4 and 5) trims the blank and pierces therein an elongated opening 13 corresponding substantially with the depression. The third operation (see Figs. 6, 7 and 8) folds the blank at its midwidth to substantially U- shape, the wings 14 of the blank lying parallel but at sufiicient distance apart to permit the fixed jaw 15 to lie between them and pass through the opening, forming what is called in the trade a box joint. The narrow end of the blank forms the jaw lever 16 of the completed member, but the exact shape or configuration of the member is not an essential feature of the invention. The end of the blank which forms the jaw lever is narrower than the claw end thereof and the sides are folded at right angles to the central portion, forming continuations of the wings, but preferably diverge slightly as shown in Fig. 8 so as to make the outer end of the jaw lever the widest portion of the completed member, the sides diminishing in height toward the end of the lever. The purpose of groove 11 is simply to remove metal so that when the folding operation is performed there will be no surplus metal at the base of the opening between the wings but the walls of the groove will simply close together opposite to lug 12 as indicated at 17 in Fig. 6. The fourth operation consists in forging lug 12 to the form of the completed claw indic'ated by 18 (see Figs. 9 and 10). After the completion of the member a hole 19 is drilled through the wings for the pivot 20.

The parts are assembled for use as shown in Fig. 1. The fixed jaw is passed between the wings and the parts are secured together by the pivot.

Having thus described my invention I claim:

The improvement in the art of maln'ng combined nail extractor jaws and jaw levers from a bar which consists in forming a blank with a groove at the claw end and forming a lug on the opposite side of the blank, then folding the blank at its mid-width to substantially U-shape and then forming the lug into a claw.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIS F. HOBBS.

Witnesses:

A. M. Woosrnn, S. W. ATHERTON.

by addressing the Commissioner of Patents, 0

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