US479037A

US479037A - Samuel trethewey

Info

Publication number: US479037A
Authority: US
Publication date: 1892-07-19
Anticipated expiration: 1909-07-19

Description

(No Model.) 1

" S. TRETHEWEY.

ROTARY SHE ABS. 7

No. 479,037. Patented July 19', 189Z.

NIT'ED STATES PATENT OFFICE.

SAMUEL TRETHEWEY, OF PITTSBURG,PENNSYLVANIA, ASSIGNOR TO THE TRETHEWEY MANUFACTURING COMPANY, OF SAME PLACE.

ROTARY SHEARS.

SPECIFICATION forming part of Letters Patent No. 479,037, dated July 19, 1892.

' Application filed June 30, 1891. $erial No. 398,028- (No model.)

To whom it may concern.-

Be it known that I, SAMUEL TRETHEWEY, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvementin Rotary Shears; and I do hereby declare the following to be afull, clear, and exact description thereof.

My invention relates to rotary shears, its

to object being to provide a form of apparatus which may be readily adjusted for cutting sheets, plates, bars, 850., to diiferent lengths, and one which provides a convenient form of carriage for feeding the sheets, plates, bars,

&c., to the shears.

To enable others skilled in the art to make and use my invention, I will describe the same more fully, referring to the accompanying drawings, in which 2o Figure 1 is a side view, Fig. 2 a plan view, and Fig. 3 a detail sectional view, of one of the lower cutter-shafts, showing the manner of retaining the cutter securely in place. Fig. 4: is a section on the line 4 4, Fig. 3; and Fig.

5 is a View of the wedge employed.

Like letters indicate like parts.

The bed or frame A, which supports the apparatus, is composed of the horizontal side beams a and the end cross-beams a, the said bed or frame resting on the underlying beams 6L2. J ournaled in suitable hearings in the end cross-beams a of the bed A is the main shaft 1). In order to impart a rotary movement to said shaft 1), a power-shaft c is situated adjacent to the bed A, said power-shaft being j ournaled in bearings in the standards (I. Atight and loose pulley e is mounted on the powershaft 0 and is adapted to be driven by any suitable power. A pinion f is secured to the 6 power-shaft c and meshes with the large gearwheel 9 on the main shaft 1). On the main shaft 1), just beyond the large gear-wheel g,is the pinion h, which meshes with a pinion t' on the lower shaft of the two cutter-shafts j j of the stationary rotary shears B. The stationary shears B are bolted or otherwise secured to the bed A, and they are composed of the upper and lower arms k 70', which extend out from the body portion 70 the said armsk k forming between them the slotZ. This slot 1 permits of the entrance'of the ends of sheets, plates, bars, 850., which extend beyond the cutters during the cutting operation. The cutter-shafts jj', arranged the one above the other, are journaled in suitablebearingsin 55. the body portion k and in the arms 70 7c of the stationary shears B. On the outer ends of the cutter-shafts jj' are secured the cutters m m, circular in form and provided with cutting-edges. To provide for the vertical ad j ustment of the cutters m m to and from each other, I prefer to have the cutter-shafts j j journaled in accordance with' the construction set forth in Letters Patent N 0. 429,072, granted to me May 27, 1890. To prevent any play of the lower cutter m and consequent displacement thereof with relation to the upper cutter m-during the cutting operation, I provide the wedge 02, adapted to enter a suitable wedge-shaped slot or seat formed in the lower arm is. This wedge 01. when in position is adapted to bear against the flange n on the inner end of the bushing 0, as illustrated in Fig. 8, and said wedge is retained therein by the nut n engaging with the threaded neck 12 7 5 of said wedge. Since the cutter m isheld on the shaftj by the nut p, it is apparent that as the wedge 77. is forced into the seat formed to receive it it will act through the flange 'n to drive back the bushing o, bringing a pressure to bear on the plate 19' on the inner end of the shaftj, thereby, through the nut 19 on the outer end of said shaft, drawing back the cutter j. This will prevent any longitudinal play or Wabbling on the part of said cutter m on the shaftj and will insure the perfect vertical adjustment of said outter, and consequently an even regular cut.

As hereinbefore stated, the pinion h meshes with the pinion t' on the lower cutter-shaftj', and thus provides for the rotation of said shaftj. To impart a like rotary movement to the upper cutter-shaft j, the pinion t' meshes with the pinion g on the said cutter-shaft j. A hanger or bracket q projects out over 5 the upper arm is, and in said hanger is journaled the idle-roller g said roller being arranged at such height as to press on the upper surface of the sheets, plates, bars, 850., to be cut as they pass between the cutters. This roller (1 serves to prevent any tendency on the part of the sheets, plates, or bars to rise during the cutting operation.

The adjustableshears G are situated on the bed A opposite the stationary shears B, and as the construction of the said adj ustable shears is exactly similar to that of the stationary shears the same letters of reference and description as applied thereto are applicable with reference to the adjustable shears 0. Power to operate the cutter-shafts of the adjustable shears G is obtained in the same manner from the main shaft b.

The adjustable shears C are mounted in suitable guideways in the bed A, and to provide for the adjustment of said shears C at different positions on the bed A with relation to the stationary shears B the frame of the adjustable shears is constructed with the hanger 73in \vhichis journaled a pinion r. The pinion o" engages with the rack s 011 the bed A,said pinion being operated bya handwheel 7", whereby upon the rotation of said hand-wheel the adjustable shears C may be made to approach and withdraw from the stationary shears B. Any other convenient form of mechanism for moving the adjustable shears C may, however, be employed.

The track t is supported on the frame Abetween the stationary and adjustable shears and is provided with the rails t, upon which the wheels of the table or carriage u are adapted to travel. The track 15 is arranged parallel with the line of the cutting and may be moved, together with the carriage 1b, to or from the stationary shears B, according to the lengths of the sheets, plates, or bars to be cut.

To support the portions of the sheets, plates, or bars adjacent to the cutters during the cutting operation and prevent their sagging, idlerollers o 1: are employed. These rollers 11 21 are journaled in suitable standards of suiticient length to bring the tops of the rollers even with the top of the lower cutters, as well as even with the top of the carriage u. The roller r may be secured at any position between the stationary and rotary shears as the adjustable shears C are brought nearer or withdrawn farther from the stationary shears.

The operation of my improved rotary shears is as follows: By turning the hand-wheel 7' in the proper direction the adjustable shears C are brought to the proper position relative to the stationary shears 13, according to the lengths of sheets, bars, or plates to be cut. The carriage 'lb and the idle-roller '0 are also brought to like positions relative to the lengths of the sheets to be cut. The cutters themselves having been adjusted properly, power is then applied to rotate the power-shaft c,

whence power is transmitted through the connections described to operate the cutter-shafts jj of the stationary and adjustable shears at a uniform rate of speed. The sheets, plates, or bars, whetherin packs or singly, are placed upon the carriage u, when said carriage is moved along, the track t to bring the ends of the sheets, plates, or bars between the cutters m on, the idle-rollers o v acting to support same adjacent to the point of cutting, and thereby preventing any sagging on the part of the sheets, plates, or bars, and so insuring an even and regular out. At the same time the idle-rollers (1 press on the upper surface of the sheets as they pass between the cutters and prevent any upward movement on the part of said sheets. In case the lower cutters m become loose on the cutter-shafts, it is only necessary to tighten the nut a on the end of the wedge a, when said wedge, in the manner hereinbefore described, will prevent any wabbling of the cutters and will retain them in a perfect vertical position.

Ky the above construction I obtain doubleheaded rotary shears, which may be adjusted for cutting sheets, plates, bars, the, to different lengths, greatly decreasing the time and labor of shearing.

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

1. In rotary shears, the combination, with a bed or frame, of cutter-shafts journaled therein, cutters secured to said shafts, and a bracket projecting out over the upper cutter and having a depending arm carrying a roller, said roller being adapted to press upon the upper face of the sheet, plate, &c., being cut, substantially as and for the purposes set forth.

2. In rotary shears, the combination, with the frame, of cutter-shafts journaled therein, the one above the other, and a wedge-shaped key engaging a flange on a bushing surrounding the lower cutter-shaft, said key aetingto force back the said cutter-shaft and prevent any longitudinal movement on the part of the cutter secured thereto, substantially as and for the purposes set forth.

3. In rotary shears, the combination, with the frame, of the lower cutter-shaftj', a bushing 0, having the flange n, the wedge 72, the plate 19, secured to the shaftj', the cutter m, and nut 19, substantially as and for the purposes set forth.

In testimony whereof I, the said SAMUEL TRETHEWEY, have hereunto set my hand.

SAMUEL TRETI'IEWEY.

Witnesess:

Rom. D. TorrnN, J. N. CooKE.