US104196A - Improved sheet-metal-fife forming and theeadzng-machxne - Google Patents

Description

tatrrl mes M. K, PIERCE, OF CALAHANS RANCH, CALIFORNIA.

Letters Patent No. 104,196, datedY June 14, 1870.

IMPROVED SHlElEIll/IEIAIi PIIIPE FORMING- AND THREADINGMACHINE.

The Schedule referred to in these Letters Patent and making part of the same..

To all whom. it may concern:

Be it known that I, M. K. PIERCE, of Calahans Ranch, in the county of Siskiyou and State of California, have invented a new and improved Sheet-metalpipe Forming and Threading-Machine; and I do-hereby declare that the following is a full, clear, and ex! act description thereof, which will enable others skilled oblique grooves and ribs along each margin, of a forming-roller, having spiralgrooves and projections at the ends, so corresponding to those ou the bed that, when placed thereon, its projections ,will lit in the grooves ofthe bed, and the projections of the latter will tit in the grooves of the former, and operating gear for` pressing the roller down upon a sheet placed between it and the bed,and attached at one endito the roller, and rolling the latter along the bed, to impart, by lthe said grooves and'projecting spiral threads to the sheet, which is rolled up atthe same time into tubular form, and forced upon punches, which are so arranged in the bed as to punch the lapping edges of the plate, to form the rivet-holes for connecting them.

Figure l a sectional elevation of 4my improved machine.HA

Figure 2 is a transverse section of the same, and

Figures 3 and 4 are details.

Similar letters of reference indicate corresponding parts.

A is a table or bed, supported in a strong rectangular framing, B, and having on each side a plate or bar, O, with grooves and projections corresponding to the grooves and projections of the screw-thread required on the pipe to be formed. These grooves and projections are pitched obliquely to the longitudinal axis of the table, according to the pitch reqniredfor thev screw. D is a cylinder, having ou each end spiral threads or grooves and projections, so arranged relatively to the plates C that the prejections of one tit the grooves of the other. This cylinder has gear-teeth E, frictionwheels F, and projecting axles G G', the latter being longer than the former.

0n each side of the table A is a toothed rack, H, in which the teeth E of the cylinder are designed to work, and above these racks are other racks, I, also designed for the said teeth to gear with, and arranged to slide back and forth on beams K, by which they are sup ported. They also gear with pinons L on theshaft M, at the end of the machine, on which is a large tooth ed wheel, by which the operating force is applied. These beams K 'are supported on a frame, N, snspended by a rod, from a lever, I, at the top of the frame, between vertical guides Q R, so asto be lowered down upon lthe cylinder to impart the pressure,'or to be raised to admit the roller to he raised for applying the plates to be formed and to remove those act-ed upon, the said pressure being applied to the fra-me N by the screws S and blocks T, which are screwed down upon the frame after the plate has been placed under the roller,'forcing the parts K' of the beams K down upon the frictionrollers F. i y

The frame N is raised byv the lever P and rod O by forcing the said lever down; the latter is held down and the frame up by swinging it tothe right previous to forcing-it down, to engage it with the hook P'.

In order to provide space under-the blocks T for thus raising the frame N, I have provided sliding bars Tl on the frame N, under the blocks, and connected them by bars T2 to pins or arms T3 on'the rod O, bywhioh, when thc lever is turned around, as above described, to engage with the hook I", the bars T will be drawn from under the blocks. After the frame is let down, the lever I is turned back to the left, thereby forcing the plates back under the blocks.

The projecting axles G- G of the roller are connected to bars G2, suspended from a lifting device at the top for raising thc cylinder off the bed for shifting the plates.

The lifting device consists of a sliding-bar, Hl, arranged in afgroove or racc in a transverse beam, H2, and a vibrating and lifting lever, H5, the` said beam being provided with -vertical holes for the passage ot' the bars G2, and the sliding bar I-I, having pins H, arranged to be forced through holes in the bars Gr2 by the lever H3, when they are caused to stand vertically by suitably adjusting the roller, so that, by pressing thelong arm ot' the lever Hi down over its fulornm, after the pins have been thrust in the holes in the said bars, the roller will be raised. This 4lever is engaged withthe catch H5 for holding the roller up.

The latter is provided with a longitudinal groove in its surface for thc reception of a clamping-bar, D, which is secured by small screws t' passingr 'through the radial longitudinal rib s, said bar being designed for holding the end of the sheet to be formed, which is inserted between the wall of the groove and the bar,

and the latter is secured or otherwise pressed againstl the said end.

The said roller is also provided with a row of holes, D?, for the reception of the punches Il, iixed in the bed, and adjusted relatively to the roller, for punching the sheet at the parts where the two ends lap, to form the holes for riveting-them together.-

The roller, after having thev sheet attached as described, isi-placed in position on the bed, and in con-v nection with the toothed racks, care being taken to so place it that, when it has performed one revolution,

the holes D2 will arrive at and coincide with the punches torreceive them in punching theholes.. The frameN is then let down in the manner described, andthe wheel'ou the shaft M set in motion, to draw the rackba'rs I, and rollthe cylinder along, by which thethreads will be formed in the sheet, and thelatter will .be bent up to form the tube.

For makingdiierent sizes of tubes, cylinders D, of

'diieren't sizes, are used, and the screws S are adj ustwith an adjusting-screw, M2, and adjusting-nut, M3.

I propose to arrange the punches D in the bed for adjustment along the samev as may be required for rollers of diti'erent sizes.

Having thus described my invention,

I claim as new and`desire to secure by Letters Patent-'- l.

1. v'lhe combination of the bed A, plates G with oblique grooves and projections, and cylinder D with grooves and projections fitting those in the plates C, all arranged for operation substantially as speciiied.

. tially as specified.

2. The combination with the bed A, plates C, spirally-groovedcylinderD and the toothed racks H I, pinion's E, and friction-rollers, substantially as specified.

- 3. The combination with the spirally-grooved cylinder D, and toothed racks I of ,the guide-beams K, and pressing-trame N, substantially'as specified. 4.. The combination IWith the frameN ofthe sliding plates T1, adjusting screws lS, blocks. T, arms T2, liftas'speciied. i n l 5. The combination with the spirally-grooved cylinder D ofthe lifting bars GZ, beam Hz, lever H3, all substantially. as specified. I

6. The combination, with the lack-bars I and adjustable frame' N, of the -v verticallyadjustable frame M1, driving-shaft M, and pinions L, all substantially as specified. p

7. The combination, with the bed A," plate C, and spirally-grooved rollerkD, ofthe punches D, substan- 8. The cylinder D, provided with the projecting axles Gr1 G1, punch-holes D2, clampingbar D1, and clamping-screws, all substantially as specified.

M. K. PIERCE. Witnesses:

J. W. BLACKBURN, '1. A. DENNY.

ing and oscillating rod 0, and' lever P, substantially bars H1, and l

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