USRE309E - Improvement in machinery for reducing metal bars - Google Patents

Description

1ulkllllllllllllllllllll N.PETEF1S. FHOTOMTHOGRAPHER. WASHINGTON .5a.

UNITED ySTATES PATENT- OEEICE.,-

DEXTER H. OHAMBERLAIN, OF BOSTON, MASSACHUSETTS, ASSIGNEE, BY MESNE ASSIGNMENTS, OF PETER COOPER, OF NEW YORK, N. Y.

IMPROVEMENT IN MACHINERY FOR REDUCING METVAL BARS.

Specification forming part of Letters Patent No. 9,542, dated January 18, 1853; Reissue No. 309, dated May 15, 1855.

To all whom. tt m ay concern f Beit known that I, DEXTER H. CHAMBER- I LAIN, of Boston, in the State of Massachusetts, have invented certain new and useful Improvements in Machinery for Reducing Metal Bars, of which the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specitication, in which- Figure l is a side elevation of my improvement as applied to reducing iron rods to a shape suitablefor nails or other articles of like character;4 Fig. 2, an end elevation of the same, and Fig. 3 an end view of the rollers and bolster.

In the said drawings A aud B represent two horizontal rollers applied, respectively, upon lthe adjacent ends of two parallel shafts, O D, that are supported in suitable bearings in a frame, E, of suitable construction. The end `of one of those rollers has a cavity, a, formed in it to the required depth from the periphery and end. At the end ot' these'two rollers, aud at right angles to their axes, there is a third roller, F, the periphery of which rolls against the ends of the two -rollers A B; The said third roller, F, is fixed on a shaft, G, mounted in suitable bearings, H I, in the frame. A block of metal, K, called a bolster, vwith its inner face curved to fit into the space in front ot' the bite of the two rollers A B, is attached to or made a part of a slide,L, supported by the frame, as represented, so as to receive a free endwise motion by means of an arm or stem, M, projecting from it, and fitted to a cam-groove, N, formed in the periphery of theshaft() of the roller A; and the form of this cam-groove should be such as to keep the front face of the bolster K in line with the face of the cavity a of the roller as the several rollers rotate, and, therefore, the inclination of the cam-groove should have the same pitch as the face of the cavity. The object of this bolster is to prevent the metal, while being drawn in a wedge form between the roller F and the face of the cavity in the roller A from spreading out and being drawn in between the cylindricalparts of the rollers A and B and forming-a fin on the rod, which would be likely to occur in drawing wedgeformed rods. The two shafts O D are geared together by spur-wheels O P, and on the outer end of the shaft C there is a spur-wheel,

Q, that engages another spur-wheel, R, of equal diameter on a horizontal shaft, S, which communicates motion by two bevelwheels` T U, to the shaft Gr of the third roller, F. The proper distance of the rollers can be adjusted by the application of screws b b and c c acting on the boxes in manner well known. -The reduction of a bar or rod on its four sides is effected by introducing it in the cavity bctwceu the rollers A B and the roller F and the opposite face of the cavity a. It will be obvious that the form of the cavity a will depend upon the form desired to be given to a bar or rod, and,therel'ore, if it be desired to produce a bar or rod with parallel faces in the direction of the length, the cavity must,

be made parallel with the periphery and end face of the roller A, in which case the bolster,ii' employed, caubc stationary.- If the bar or rod is to be reduced to a form with two faces parallel, and the others inclined or wedge-form, the periphery of the cavity may be eccentric, so'as to roll the wedge .be tween the rollers A and B, while the parallel faces will be reduced or produced betweenthe roller F and the face of the cavity, or vice versa. And it will also be obvious that the cavity may be made in eitherof the rollers A B, or partly in one and partly in the other, and occupy a portion of or the entire circum-v ference ot' the roller or rollers.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The method of rolling bars or rods ou four sides by the combination ot' three rollers arranged with the axes of two of them parallel and thc tl1ird at right angles thereto, substantially as speciiied, whereby two opposite faces' of the bar or rod are drawn between the two rollers on parallel axes, Aand the other two faces between the periphery of the third roller andthe face of a cavity formed in one or both of the other rollers, as specified.

2. In combination with the three rollers, combined and arranged substantially as specified, the employment of the bolster, substantially as specified, to prevent the forming of a lin on the bar at the junction of the two parallel rollers, as set forth. DEXTER H. GHAMBERLAIN.

. Witnesses:

J. FEANois HowE, GHAs. G.DARL1NG.

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