US16337A - Improvement in forming joints of sheet metal - Google Patents

Description

UNITED STATES PATENT OFFICE.,

J. J. LAUBACH, OF EASTON, PENNSYLVANIA.

IMPROVEMENT IN FORMlNG JOINTS OF SHEET METAL.

Sprcilication forming part of'Letters Patent No. 16,337, dated Jnnuary`61857.

YTo a'ZZ whom, t may concern:

Be it known that I, J. J. LAUBACH, of Easton, in the county of Northampton and State of Pennsylvania, have invented a new and usefulmprovement in Machines for Glosing the Locks of Sheet-Metal Plates; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a side view of myimprovement. Fig. 2 is an end view of the same.

Similar letters of reference indicate corresponding parts in the two figures.

My invention consists in attaching a pressure-roller to the ordinary machine used for closing the locks of sheet-metal plates, said pressure-roller being attached .to a swinging bar, and arranged as will be hereinafter fully shown and described, whereby the locks are pressed immediately after being closed and before the plates are removed from the machine.

' To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A represents a base, to which an upright, B, is attached, and C represents a horizontal bar attached to the upright B, said'bar forming the bed 'on which t-helock of the plates are placed.

D represents a horizontal barattached to t-he upper end ofthe upright Bthe bar I) being parallel with the bar C.

E represents a rack bar, which works through the upright B. rIhis rack-bar has a roller, F, fitted in one end of it, theperiphery of said roller being grooved and resting upon the bar C. A pinion, F, gears intothe rackbar, said pinion being fitted-in the upright B, and havingits axis extending through the upright, and a crank, G, attached to its end.

H represents a horizontal arm attached to the end of the rack-bar`gabove the roller F.

This arm has a friction-ro ler, a, placed upon it, said roller bearing aganst the under surface of the bar D. To the outer end of the arm H a pendent bar, I, is connected by a hinge or joint, b, said hinge or joint being so formed that the bar I is allowed to swing inward ortoward the upright B, but not outward or from it. To vthe lower end of the bar I a roller, J, is fitted.

The operation is as follows: The edges of the sheet-metal plates (shown in blue) are bent in the usual manner by any of the machines now used for that purpose, and the edges of the sheets or plates being locked the lock is placed upon the bar C, the rollerF being pre,- viouslymoved back near the upright B. The roller F is then moved forward,orinthe direction indicated byarrow 1, and the edges of the roller bear upon the sheets or plates at each side of the lock and close it, the roller .L not pressing or acting upon the lock inl consequence 'of the bar I being allowed to move inward. lengtlnthe motion of the rack-bar is reversed, and as the bar moves backward, or in the direction of arrow 2,the roller .I bears upon the upper surface of the lock and compresses it.

The rack-bar E and roller F, arranged as herein shown, are well known, and commonly used for closing'thelocks; but the locks have been heretofore compressed by hand with a mallet after being removed from the machine.

By my improvement theloeksare compressed claim as new, and desire to secure by Letters Patent, is-

The roller J, attached to the pendent and swinging vlbar I, which is connected or jointed -to the arm I-I, substantially as described, for

the purpose set forth.

` J. J. LAUBAGH.

Witiiesses:

HENRY PEAoocK, A. DE PUE.

Vhen the lock is closed its whole-

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