US837997A - Shears. - Google Patents

Description

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G. G. ZELLER.

SHEARS. 'APP'LIUATION FILED MAB.e.19oe.

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`UNITEDv STATES PATENT OFFICE.

y GEORGE G. ZELLER, OF TIFFIN, OHIO.

Specification of Letters Patent.

Application led March 6, 1906. Serial No. 304,584.

T0 (1J/Z Vi12/2,0711, it may concern:

Be it known that I, GEORGE O. ZELLER, a citizen of the United States, residing at Tiffin, in the county of Seneca and State of Ohio, have invented certain new and useful Improvements in Shears, of which the following is a specification.

This invention relates to improvements in scissors and shears, and has special reference to the means for pivotally connecting the two members of the instrument. The common practice is to unite the parts by means of a rivet or a screw. In the case of a rivet the blades or members are held in unchangeable relation with each other, while with the screw the constant working of the blades in use has a tendency to turn the screw, so as to cause it to tighten or work loose in a manner to detract from the efficiency of the instrument.

The object of this invention is to provide a connecting means between the two jaws or members of the shears which will enable said members to be tightened or loosened and which will relieve this connection from any liability to change the position given it by the movement of the parts in use.

I accomplish the objects of the invention by the means illustrated in the accompanying drawings, in which- Figure 1 is a view inside elevation of a pair of shears embodying my invention. Fig. 2 is a transverse section on the line 2 2 of Fig. 1, showing the members of the shears proper in section, but the connecting mechanism not in Fig. 3 is a similar view in which the sleeve surrounding the screw is in section. Figs. 1, 5, and 6 are details in perspective showing the sleeve and screw separated. Fig. 7 is -a detail in side elevation of the shears adjacent to the pivot, showing the pivot and the sleeve in section longitudinally of the blade and showing the two-part sleeve next to the screw covered by an additional sleeve and Fig. 8 is a detail in transverse section of the modified construction shown in Fig. 7.

Like characters of reference indicate like parts throughout the several views of the di awings.

Referring to the drawings, 9 represents one of the blades of the shears, and 1() its handle. 11 represents the opposite blade, and 12 the These blades are united by means of a transversely-divided cylinder, the

l two parts of which are represented in perspective in Figs. 4 and 5, respectively. The separation between the two parts of this cylinder is in two planes preferably parallel with each other, but suitably remote from each other in order to form the overlapping shoulders 14, whereby a broken joint willbe formed at the meeting ends of the two parts. The cylindrical parts of this pivot are represented by a character 13, and each of the parts 13 terminate at their outer ends with the. expanded portions or heads 15, which contact with the outer sides of their respective blades. One of these cylindrical parts is screw-threaded in the bore which is formed longitudinally therethrough. A like bore is formed through the other cylindrical part of the pivot, and the two parts of the cylinder are connected and drawn together after insertion in the shears by means of a screw 19, which passes first through the unthreaded hole into the threaded part thereof. The proximity of the blades to each other will be regulated by tightening or loosening up the screw in a manner such as will be readily understood from the drawings.

In order to take the wear off of the twopart cylindrical pivot, I may make the hole for the pivot through the blades of the shears sufficiently large to allow the introduction of a sleeve 1S between the parts 13 and the walls of the pivotal opening. This sleeve may be of hardened steel, which will practically eliminate all wear upon the parts 13 and will l'also cover the joint between the meeting ends of the cylindrical members of the pivot.

Having thus fully described my invention, what I claim as new, and wish to secure by Letters Patent of the United States, is-

1. In a shears or scissors a pivot connecting the two blades thereof said pivot comprising transversely-divided cylindrical portions each of said cylindrical parts having expanded outer ends, and a screw passing through the cylindrical parts and drawing them together.

2. In a shears or scissors the combination with the two blades thereof of a pivot therefor comprising a two-part transversely-divided cylinder, said parts having expanded outer ends and overlapping shoulders at their inner ends, and a threaded bolt or screw passing through the parts of the cylinder to unite and draw them together.

Patented Dec. 11, 190e..

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3. In a shears or scissors the Combination In Witness whereof I have hereunto set my with the tWo blades thereof of a pivot theren hand and seal, at Indianapolis, Indiana, this 1o fogl (falorn risding aJ-t1Wo1pattrlansverslelydi- 27th dey of February, A. D. 1906.

V1 e oy 1n er, san ey 1n rica arts iavlng expanded outerends,as1eeve suriounding the GEORGE C' ZELLER' [L' 5'] divided cylindrical parts and a screw or bolt Witnesses:

passing through the cylindrical parts to unite J. A. MINTURN, and draw said parts together. F. W. WOERNER.

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