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Publication numberUS440436 A
Publication typeGrant
Publication dateNov 11, 1890
Filing dateAug 28, 1890
Publication numberUS 440436 A, US 440436A, US-A-440436, US440436 A, US440436A
InventorsRichard S. Pearsall
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Shears
US 440436 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)

B. s. PEARSALL. SHEARS.

Patented Nov. 11, 1890.

W/T/VES ES. IIVVE/VTOR. 2% 21W ATTORNEYS 1 vans co" mmouma, WASNINGYON, c4 c4 UNITED STATES PATENT OFFICE.

RICHARD S. PEARSALL, OF SEA CLIFF, NEWV YORK.

SHEARS.

SPECIFICATION forming part of Letters Patent No. 440,436, dated November 11, 1890.

Application filed August 28, 1890- Serial No. 363308. (No model.)

To all whom it may concern:

Be itknown that I, RICHARD S. PEARSALL, of Sea Olifi, in the county of Queens and State of New York, have invented a new and useful Improvement in Shears, of which the following is a full, clear, and exact description.

My invention relates to certain improvements in shears of the class shown and described in Letters Patent No. 430,677, granted to me June 24, 1890; and my presentinvention consists, principally, in hinging the thumb support or clip at the end or approximately at the end of the shank of the blade, so that the clip will be practically unsupported back of the hinge and free to drop back to a reverse angle to accommodate itself to the ball of the thumb when in a natural position, thus obviating strain upon the thumb-joint in the use of the shears.

The invention also consists in extending the thumb-support in front of the hinge and in curving the shank of the lower blade upward in front of its edge to furnish room and a better grip for the front finger of the user.

The invention further consists of the construction, arrangement, and combination of parts, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional side elevation of a pair of shears made in accordance with my invention. Fig. 2 is a perspective view of the thumb-ring. Fig. 3 is a sectional elevation of a modification, and Fig. 4 is a perspective view of the thumb-support.

To the end of the shank a of the lower blade A is hinged the thumb support or clip B, which is adapted to tilt back to the position shown in dotted lines in Fig. lthat is to say, the end of the shank is out off or beveled at a, so as not to act as a-support to the thumbclip, as shown in Fig. 1; or, instead of this, the clip may be hinged directly to the end of the shank, as in Fig. 3, or the hinge-lugs b b in Fig. 1 may be made of such length relatively to the length of the shank in rear of the hinge-pin b that the clip may drop back to the angle indicated in dotted lines, which adapts the lower surface of the clip to fit the ball of the thumb when held in a natural po sition while in the act of cutting with the shears. The thumb-clip is extended in rear of the hinge, as shown at d, and also in front of the hinge, as shown at d, and about midway of its length is formed,Figs. l and 2, the ring d to fit over the top of the thumb. In Figs. 3 and 4 the ring as such is omitted, but instead thereof is formed at the front of the clip the cover f to receive the end of the thumb. By extending the clip in front of the hinge, as at d, a perfect support is produced and the thumb is prevented from slipping too far through the clip. The shank g of the upper blade is curved upward at g in front of the eye 71, to furnish ample room for the forefinger in the use of the shears.

In Figs. 3 and 4 the end of the shank a is turned to form an eye j to receive the ringj at the bottom of the clip to form the hinge; but I prefer the form of hinge shown in Figs. 1 and 2, though more expensive.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. As an improvement in shears, the shank of the lower blade of the shears having'hinged at the end or near the end thereof a thumbclip which is adapted to tilt back to an approximately unlimited extent, substantially as described.

2. The thumb-clip hinged at its center to the rear extremity of the shank of the lower blade to tilt back toward the finger eye or loop of the other shank, and formed with the rear extension d, front projection (l', and ring 61 substantially as described.

3. The shank a of the lower blade, in combination with the clip B, hinged at its center to the shank and formed at the front with the cup f, substantially as described.

RICHARD S. PEARSALL.

Witnesses:

WILBUR V. D. PEARSALL, E. M. CLARK.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2640264 *Dec 27, 1950Jun 2, 1953Sullivan Cecil JThumb guide shear handle
US2669991 *Dec 27, 1951Feb 23, 1954Curutchet Pedro DomingoTetradigital grip for long lever pivoted surgical instruments
US2863459 *May 29, 1956Dec 9, 1958Ervin J CasperInstrument for holding surgical needle
US4140124 *Jul 7, 1977Feb 20, 1979Curutchet Pedro DHandles for surgical instruments
US4453311 *Oct 22, 1982Jun 12, 1984Twigger Alan RScissors with thumb retainer
US4642895 *Nov 4, 1985Feb 17, 1987Gauvry Glenn AScissors with adjustable thumb loop
US4742617 *May 28, 1987May 10, 1988Gauvry Glenn AScissors having an obliquely oriented thumb loop with limited dampened flexibility
US5469624 *Nov 19, 1993Nov 28, 1995Brenton; Billy H.Interchangeable thumb ringlets for pivoted cutting and grasping instruments
US7966733 *Jan 19, 2007Jun 28, 2011Dong Ho JunScissors with a ringlet
Classifications
Cooperative ClassificationB26B13/20