US258376A - Cam bering-machine - Google Patents

Description

(No Model.) '2 Sheets-Sheet 1.

WP CLARK.

GAMBERING MACHINE.

Patented May 23, 1882..

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W. CLARK.

w GAMBERING MACHINE. I No. 258,376. I Patented May 23, 1882.

u. PETERS. Pholndjlhvgmpher. Wmhinglom n. c.

UNITED STATES PATENT OFFICE.

WILLIAM CLARK, or rir'rseune, PENNSYLVANIA.

CAMBERING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 258,376, dated May 23, I882,

Application filed October 26, 1881. (No model.)

To all whom it may concern Be it known that I, WILLIAM CLARK, of Pittsburg, county of Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvement in Oambering-Machines; an d'I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanyin g drawings, making a part of this specification, in, which-like letters indicating like parts Figure 1, Sheet 1, is an end view of my improved machine. Fig. 2 is a top or plan view thereof, showing a rail in process of being bent or cambered. Fig. 3, Sheet 2, is a side elevation of the machine; and Fig. 4 is a detached view, in elevation, of one of the guide-plates employed.

My present invention relates to a machine chiefly designed for giving the proper .or any desired camber to railway-rails,though by the proper changes in the forms or shapes of the operative surfaces it may be adapted to a like use with other heavy structural irons or steels; but as the invention can be well explained in its organization and use for bending railwayrails, I will so describe it.

It is well known that after a railway-rail has been brought to the proper shape by rolling it has to receive an upward curvature, which should be uniform from end to end, or nearly so. This curvature is given to it while still hot, or comparatively so, and is of such amount or degree that it will about compensate for that tendency to curve in the opposite direction which results from unequal shrinkage in the head and base of the rail while cooling. In practical use I run the rail as it leaves the finishingrolls onto a table and saw 0d the ends, so as to give it the desired length, and then pass it onto the cambering-machine shown in the drawings, where A represents the housings, and B a pair of rolls.

The driving-gear and adjusting-screws are such as are well known in the art, and need not be described at length.

In suitable seats or recesses made in the inner or adjacent faces of the housings I arrange four guides, a a c c, as here shown, of plate form, Fig. 2, the shape of each guide-plate being substantially as represented in Fig. 4, and those guides are so arranged that the projectthe feeding side is substantially as represented in Fig. 3, and such guides, in connection with the working-faces of the rolls B at the point of bite, give, as also shown in Fig. 3, an opening, 6, approximately or exactly of the form and size in cross-section of the rail to be bent.

In Fig. 2 I have shown the guides 0: cf on the feeding side as having their inner faces parallel with each other and also parallel with the line offeed, or, in other words, in planes at right angles with the axes of the rolls. This is the preferable adjustment, since no difiiculty will then he experienced in passing the rail into the bite of the rolls; but the guides cc on the delivery side are adjusted or set somewhat angularly to the line of feed, as illustrated in Fig. 2, and to a greater or less angle, as may be desired, so that the outgoing end or part of the rail shall thereby be deflected or bent to one side or laterally as regards the line of feed or downwardly as regards the tread or head of the rail. Power applied to thetrolls gives the forward feed. The operative bearingpoints in such bending operation are first along the face of the guide a, second on the shoulders s s of the rolls B, and third along the face of the guide 0. The other guides, as also the other biting parts of the rolls, operate chiefly, if not entirely, as guides for keeping the rail properly in place and guiding it properly in its travel. Preferably, each guide is made in two parts, as illustrated especially in Fig. 3, where 1: represents a cast or wrought iron block, which operates as a holder to the steel face 1;, and the two are held together by nuts '0 (shown in dotted lines,) which are screwed upon the clamping-bolts d and into recesses made in the back faces of the blocks 27, as illustrated by dotted lines; but instead of attaching steel plates to the holders o, as described, the latter may be employed. as holders and carriers, each for one or more anti-friction rolls, the operative faces of which may be adjusted in like manner with reference to guiding and bending as is above described with ref erence to the guide-plates, and such substitute is hereby included herein as a mechanical equi valent of the guides shown.

If desired, the guides at a may be set at a slight angle to what is represented as the line of feed, so that a part of the bending shall be done on the feeding side of the rolls; but this is somewhat objectionable on account of the difficulty which would then exist of feeding the rail far enough between the rolls for the latter to get a feeding bite thereon; but if, as may be done, separatefeeding and delivery rolls are employed, this objection would be removed.

I am aware of and hereby disclaim the construction of straightening-machine shown and described in United States Patent No. 85,917, January 19, 1869.

I claim herein as my invention- The rollsB B, having each a tongue or shoulder, 8, adapted to engage the under side of the head of a rail while passing through,'in com- 20 bination with side guides on both the feeding and delivery sides of the rolls, arranged and adjusted to engage the top of the rail-head and bend the rail out of the direct line of feed to a uniform curvature, substantially as set forth. 2 5

In testimony whereof Ihave hereunto set my hand.

WILLIAM CLARK.

Witnesses:

R. H. WHITTLESEY, GEORGE H. OHRISTY.

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