US946918A - Scissors or shears. - Google Patents

Description

G. H. ISBELL. SGISSORS 0R SHEARS.

APPLICATION FILED AUG. 20, 1909.

946,918. Patented Jan. 18,1910.

GEORGE H. ISBELL, OF I-IOTCI-IKISSVILLE, CONNECTICUT.

SCISSOBS OR SHEARS.

Specification of Letters Patent.

Patented J an. 18, 1910.

Application filed August 20, 1909. Serial No. 513,839.

To all whom it may concern:

Be it known that I, GEORGE E. IsBELL, a citizen of the United States, residing at I-Iotchkissville, in the county of Litchfield and State of Connecticut, have invented a new and useful Improvement in Scissors or Shears; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1 a plan view of a pair of scissors or shears embodying my invention. Fig. 2 a sectional view on the line a?; of Fig. 1. Fig. 3 a similar sectional View illustrating a modified form of my invention.

This invention relates to an improvement in scissors and shears.

In the use of scissors and shears, and particularly shears, it is desired that some spring device be arranged adjacent to the pivot to throw the edges of the blades together so as to keep the scissors or shears in condition for cutting. Various devices for this purpose have been employed some of which are more or less cumbersome.

The object of this invention is a simple arrangement of spring device which will maintain its tension and which cannot be effected from the outside as is the case when a screw tension device is employed; and the invention consists in the construction hereinafter described and particularly recited in the claims.

The blades 2, 3, are of usual construction provided with the usual grips 4:, 5, and secured together by a pivot 6. In one of the blades as 2 adjacent to the pivot, I form a circular opening 7 and the inner end 8 of this opening is enlarged to form a shoulder 9. Into this opening I pass a cupshaped shell 10 slightly deeper than the thickness of the blade so as to project slightly beyond the outer face of the blade, and this shell is formed with a flange 11 which seats on the shoulder 9, the mouth of the shell being flush with the inner face of the blade. Into this cup-shaped shell 10 I place a coiled spring 12 formed from a high grade of wire and into the spring I place a plug 13 having a flange 14 which corresponds in diameter to the internal diameter of the cup and which rests upon the spring. The face of this plug is preferably recessed to receive an anti-friction ball 15 which is forced by the spring against the inner face of the blade 8 and so as to separate the blades at a point below the rivet, and consequently throw the edges of the blades together.

Instead of employing an anti-friction ball 15, it is apparent, and as shown in Fig. 3 of the drawings, that the face of the plug 13 may bear against the blade 8, accomplishing, to a certain extent, the same result as the anti-friction ball.

It will be seen that the spring is entirely inclosed; it maintains a constant tension, and cannot be effected from any outside source; and the end of the cup will not interfere with the ordinary use of shears, that is, it is not liable to catch when the shears are 111 use.

I claim 1. A pair of scissors or shears comprising two blades pivoted together, one of said blades formed with an opening at a point below the pivot, a cup-shaped shell formed from a single piece of metal closed at its outer end and rigidly located in said opening, a plug located in said shell and formed with a flange, and a wire spring in said shell and bearing against the closed end of the shell and against said flange.

2. A pair of scissors or shears comprising two blades connected together, one of said blades formed with an opening at a point below the pivot, a cup-shaped shell located in said opening, a wire spring bearing against the bottom of said shell, a plug resting on said spring, the face of said plug recessed, and a ball located in said recess.

8. A pair of scissors or shears comprising two blades connected together, one of said blades formed with an opening at a point below the said pivot, the inner end of said opening enlarged, a cup-shaped shell entered into said opening and formed with a flange at its inner end, a spiral spring entered into said cup against the bottom of which it rests, a plug Within said spring and formed with a flanged bearing upon the said spring, a recess in the inner face of said plug, and a ball located in said recess and adapted to bear against the inner face of the adjacent blade.

In testimony whereof, I have signed this specification in the presence of two subscribing Witnesses.

GEORGE H. ISBELL.

Ht-nesses WILLARD A. IsBnLL, GEORGE F. MORRIS.

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