US581165A - Mechanism for operating shears - Google Patents

Description

(No Mode.) 2 Sheets-Sheet 1.

J. KENNEDY. MEGHANISM EUR OPERATING SHEARS, PRESSES, dw No. 581,165. PatentedvApr. 20, 1897;

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KENNEDY MECHANISM EGROPERATING SHBARS, PRESSES, Gac. No. 581,165. PatentedApr. 20, 1897.

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JULIAN KENNEDY, OF PITTSBURG, PENNSYLVANIA.

MECHANISIVI FOR OPERATING SHEARS, PRESSES, 80C.

SPECIFICATION forming part of Letters Patent No. 581,165, dated April 20, 189'?.

Application filed February 2, 1897. Serial No. 621,705. (No model.)

To all whom, t may concern,.-

Beit known that I, JULIAN KENNEDY, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Mechanism for Operating Shears, Presses, dac., of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a front elevation, partly in section, of shears constructed in accordance with my invention; and Fig. 2 is a vertical longitudinal section of the same.

My invention relates to mechanism for operating the movable member of shears, presses, and like apparatus, and is designed to greatly cheapen and simplify their construction, reduce the amount of space occupied thereby, and at the same time procure a stronger device.

To that end it consists in a plunger arranged to operate the movable member of the apparatus, the rod or rods connecting the plunger to the movable part passing through the head of the plunger-cylinder instead of, as heretofore, being connected to a crosshead secured at the upper end of the plunger and extending from the cross-head eXteriorly to the cylinder.

In the drawings, in which similar numerals indicate corresponding parts, I show my invention as applied to a shear mechanism, 2 representing the general frame and 3 the single-acting plunger or ram-cylinder, which is preferably cast integral with the cored-out support, having outer legs 4 4 and an inner web 5.

6 is the plunger, movable withinthe cylinder 3, and 7 7 4are rods secured within this plunger and extending directly through the cylinder-head to the movable shear-blade 8. Suitable stuffing-boxes 9 9 are provided within the cylinder-head for the rods 7, which rods are reduced in diameter to form shoulders 10, fitting in corresponding recesses in the plunger. The cylinder 3 is provided at its upper end with a packing-gland ll, and the central portion of the plunger is made hollow, forming a cylinder 12, which moves over the stationary hollow plunger 13, through which iluid is introduced into the cavity of the plunger 6. This second plunger 13 is provided for the purpose of forcing the plunger 6 back to its normal position with the shear-blades open, gravity assisting in this return stroke.

14. is the stationary shear-blade secured to the frame, and l5 and 16 the usual feed-rollers and guides for the metal operated upon.

The advantages of my invention will be apparent to those skilled in the art, since the cumbersome, long, and heavy crosshead which has heretofore been employed upon the upper end of the plunger and to which the rods connecting it to the movable shearblade or other element were secured is done away with, and the rods pass directly through the head of the'plunger-cylinder. Not only is this upper heavy cross-head done away with, but the lower cross-head or movable shear-blade support is 0freatly shortened up and made more compact and stronger by reason of the rods connecting it to the plunger being brought closely together.

It is evident that the parts may be so arranged that the plunger operates the upper shear-blade instead of the lower and also that the mechanism may be employed upon presses and other apparatus with the. same advantages as upon the shears shown.

Many other changes will suggest themselves to those skilled in the art without departure from my invention, since Vhat I claim is l. A shear having a movable shear-blade, a cylinder having a plunger movable therein, and rods secured to the plunger and passing through the cylinder-head, said rods being secured to the movable shear-blade, the plunger being arranged to move said shear-blade toward the othershear-blade and perform the shearing operation.

2. Ina shear, a plunger-cylinder supported upon suitable standards, a iiXed shear-blade secured tothe cylinder-head casting, a plunger within the cylinder having rods passing through the cylinder-head, these rods being secured at their outer ends to the movable shear-blade and acting as the guides for said blade in its movements.

3. Mechanism for operating shears, presses, duc., comprising a single-acting plunger-cylinder, a hollow plunger movable therein, a

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ro inder and having rods extending through the cylinder-head, said rods heilig Connected to the movable shear-blade :tnd arranged to uetuate the sume in shearing the metal and for-ming the only guides for the shear-blade.

In testimony whereof I have hereunto set I5 my hund.

JULIAN KENNEDY. Witnesses:

THOMAS XV. EAKEWELL, G. I. IIOLDSIHP.

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