US2490012A - Shears - Google Patents

Description

Dec. 6, 1949 E. BISSONNEYTTE 2,490,012

SHEARS Filed July 11, 1946 i 5 l'uy/zeBzZswwz/wf Patented Dec. 6, 1949 UNITED STATES P OFFICE SHEARS Eugene Bissonnette, Montreal, Quebec, Canada Application July 11, 1946, Serial No. 682,808

2 Claims. 1

The present invention pertains to a novel shear for cutting heavy material such as sheet metal, pipes and the like.

The principal object of the invention is to provide a simple and sturdy device of this character adapted to be readily portable from place to place and easily installed at or removed from the job.

In the accomplishment of this object, the device comprises a base member, adapted to be easily attached to a support, and a post extending upwardly from the base member. One blade of the shears is fixed to the post, and the other blade is pivotally attached to the fixed blade for shearing action in conjunction therewith. To the post is also attached an operating lever connected to the pivoted blade by a link. The link is attached to the lever at a point that produces high multiplication of force.

Another object of the invention is to provide auxiliary or reinforcing means for maintaining the fixed blade in its fixed position. This means consists of a brace or link extending from the post to the pivotal attachment of the two blades to each other and is attached to the post preferably at the pivot point of the operating lever thereon.

The invention is fully disclosed by way of example in the following description and in the accompanying drawings in which:

Figure 1 is a side elevation of the device;

Figure 2 is a perspective view of the device, and

Figure 3 is an end view.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

In Figure 1 is shown a table or support I on which is secured an angular bracket 2 constituting the base of the shears. To the vertical side of the bracket 2 is attached the lower end of an upwardly extending vertical post 3, by suitable means such as screws 4.

A fixed cutting blade 5 has one end attached to the lower portion of the post 2 by a screw or bolt 6, with a spacing block 6 (Figure 3) inserted between the blade 5 and the post 3 for a purpose that will presently appear. The upper edge of the blade 5 is sharpened at 1, and the end of the blade remote from the post is preferably turned slightly upward as indicated by the numeral 8.

To this end is attached one end of the complementary or movable blade 9 by a suitable pivot pin Ill. The blade 9 has its lower edge sharpened t H and disposed directly over the spacer 6' in order to pass the sharp edge I of the blade 6 as in the usual shearing action. To the up r end of the post 3 is pivotally attached an operatin lever 12 by means of a suitable piv p The lever I2 is attached by a double link t the free end of the blade 9, and it is now evident that the lever 12 is utilized to oscillate the blade 9 relatively to the fixed blade 5.

A reinforcing brace or link extends from the 2 pivot I3 to the pivot Ill. Although not essential for the operation of the shears, the brace I5 maintains the pivot pin ii! and hence the blade 5 in a fixed position.

The shears are used for cutting heavy materials such as sheet metal, pipes and the like. When secured to a table 6 or other support in the manner described, a heavy pressure can be applied through the lever i2 to the movable blade ll, especially as the result of the high ratio of the lengths of lever l2 at opposite sides of the double link it. By reason of the simple manner of attachment of the bracket 2 to the post I, for example by means of screws 16, the device is rendered portable and easily installed or detached.

Although a specific embodiment of the invention has been illustrated and described, it will be understood that various alterations in the details of construction may be made without departing from the scope of the invention as indicated by the appended claims.

What I claim as my invention is:

1. A shears comprising a base adapted to be fixedly mounted, a post secured thereto, a blade fixed to said post, a spacer between said blade and post, a complementary blade having one end pivotally attached to the fixed blade and overlying said spacer, a lever pivotally attached to said post, a link connection between said lever and the pivoted blade.

2. A shears comprising a base adapted to be fixedly mounted, a post secured thereto, a blade fixed to said post, a spacer between said blade and post, a complementary blade having one end pivotally attached to the fixed blade and overlying said spacer, a lever pivotally attached to said post, a link connection between said lever and the pivoted blade, and a brace between said post at the pivotal attachment of said lever and the pivotal attachment of said blades to each other.

EUGENE BISSONNETTE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 412,362 Brown Oct. 8, 1889 959,035 Taylor May 24, 1910 1,647,233 Knoll Nov. 1, 1927 1,675,563 Klohe July 3, 1928 2,355,320 Nebel Aug. 8, 1944 FOREIGN PATENTS Number Country Date 120,763 Germany June 26, 1901

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