US254890A - wheeleb - Google Patents

Description

I (No Model.) 4 Sheets-Sh eet 1. W. A. WHEELER. MACHINE FOR FORMING GIRGUMFERENTIALURIMPS IN SHEET METAL PIPES.

Patented Mar. 14,1882.

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(No Model.)

4 Sheets-Sheet. 2.

W. A. WHEELER. CHINE FOR FORMING OIRGUMPERENTIAL GRIMPS INSHEET METAL PIPES.

,890. Patented Mar. 14,1882.

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(N0 Mode l.) 4 sneetb-snet s. W. A. WHEELER. MACHINE FOR FORMING OIRGUMPERENTIALOEIMPS IN SHEET METAL I PIPES.

Patented Mar. 14,1882.

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(No Model.) H 4 Sheefs-Sheet 4.

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MACHINE FOR FORMING OIRGUMPERENTIAL CRIMES IN SHEET METAL PIPES No. 254,890. 'Patelited Max:1 1, 1882.

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. ters Patent No. 221,974were fication.

UNITED STATES PATENT OFFICE.

WILLIAM A. \VHEELER, OF INDIANAPQLIS, INDIANA.

MACHINE FOR FORMING CIRCUMFERENTIAL CRIMPS IN SHEET-METAL PIPES.

SPECIFICATION forming part of Letters Patent No. 254,890, dated March 14, 1882. Application filed November 14, 1881. (No model.)

of the city of Indianapolis, county of Marion,

and State of Indiana, have invented certain new and useful Improvements in Machines for Forming Circumferential Orimps in Sheet- Metal Pipes, of which the following is a speci- My saidinvention consists of a machine for forming circumferential crimps in sheet-metal pipes; and it is in some particulars an improvement upon the invention for which Letgranted me, hear ing date February 24, 1880.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a side elevation of a machine embodying my improvements, portions of the frame-work being broken away to show the mechanism more clearly; Fig. 2,a vertical section thereof on the dotted line a a; Fig. 3, a top or plan view of the machine; Fig. 4, an underside plan of the'top portion of the machine as seen when looking hpwardly from the dotted line 21 c,- Fig. 5, a top or plan view of the central portion containing'the crimping-wheel's, the inside stationary rest for the pipe-section being removed; Fig. 6, a detail section on the dotted line to w,- Fig. 7,a detail view as seen when looking to the left from the dotted line or m; Fig. 8, a detail view as seen when looking to the left from the dotted line y y,- Fig. 9, a detail section on the dotted line a 2,- Fig. 10, a plan view of those portions of the machine below the table as seen when looking downwardly from the dotted line o o, and Fig. 11 a front elevation of the bottom portion of the machine as seen when looking at the same from the dotted line at the left of Fig. 1.

in said drawings, the portions marked A, A,

A ,and B represent the framework of the machine; O, the table thereon; D, sliding clamps on said table; E, a circular disk underneath said table, by which the sliding clamps are actuated; F, an inside clamp or rest for the pipe-section; G, an inside stationary rod on which the clamp F is secured; H. a hollow revolving shaftsurroundingthe rod G,and which operates a portion of the mechanism; I, a

drivingshaft which drives the shaftH through the block L up past the shaft bearing on the frame-work B, and which, as it rests closely against said frame-work, between lugs thereon, is prevented from any but a vertical movement; N, a sleeve supported bythearmM upon the upper portion of the hollow shaft H,

which is adapted to be moved vertically bysaid arm, and which forms part of a toggle- -joint mechanism for expanding the revolving formers or crimping-wheels; (),a circnlarhead secured to and revolving with the shaft H, which carries the crimping-wheels; P, the crimping-wheels or revolving formers, which form the crimps in the section of pipe; and Q, a treadle by which a detent is released and the Working parts put in operation.

Theframe A A A B is preferably composed of cast-iron parts bolted rigidly together. The parts A A serve as bridge-trees and carry the hearings in which the vertical shafts rest,

I as also the part B, which is in the form of a wing on said parts A A Upon the part B are the bearings for the horizontal shafts I J.

The table 0 rests directly upon the upper ends of the frame'parts A, and is rigidly secured thereto. It is provided with adjustable dovetailed slides, (composed of the parts 0 c and adjusting-screws 0 which pass through bosses 0 as shown.) in which the clamps D move. Brackets (3 are secured to the upper side thereof and sustain a ring, 0 upon which or projecting points thereon the section of pipe rests when placed in the machine. These brackets are rendered adjustable by the adjustingscrews 0 which operate as indicated most plainly in Fig.2.

The clamps D are each formed of two parts, as shown, one of which is adjustable on the other by means of adjusting-screws d, which pass through bosses d upon one part and against the ends of or projections upon the other. I

The disk E rests inside a flange, c, which projects downwardly from the under side of the table 0, and is capable of a rotary move ment therein so far as the mechanism will permit. Slots 6, which are formed at an angle with the radii of the disk, are formed therein, down through which project studs 61 from the lower side of the clamps D. Thus when said disk is rotated said clamps are forced toward or from each other, according to the direction in which the disk is moved.

The inside clamp or rest, F, is secured to the top of the central stationary rod, G. It serves as an inside rest for the section of pipe while it is in the machine and being operated uponi Its lower edge should consist of steel sections,.which are secured to the upper orcastiron parts. By means of the inside threaded sleeve,f, and the cone-shaped nutf thereon, the sections f can be expanded as they wear by simply turning said nut, and thus add greatly to the durability of these heads F.

The rodGris held in place by being screwed into the stirrup (don the frame part A, and which practically forms a part thereof. It is adapted to be adjusted up or down by being turned in said stirrup, and when in right position is prevented from moving therefrom by the lock-nut g, which is shown as having a handle for convenience.

The hollow shaft H rests and turns upon a sleeve, H in the frame part A, and is secured from rising out of its seat in said cylinder by a nut, h thereon. This shaft is adjustable vertically by means of the bell-crank lever H and its screw 7L the operation of which will be readily understood by reference to Fig. 2.

The shaftI is an ordinary driving-shaft and runs in hearings on the frame part B. It bears the tight and loose pulleys 1 1 by which it is driven, the spin-gear 1 and the bevel-gearl, or their equivalents. for the purposes specified. The counter-shaft J also rests in bearings on the frame part B. It carries the two camwheels J and J the loose combined gear and clutch wheel J and the clutch part J As the wheel J is loose on this shaft, said shaft only revolves when the clutch is thrown into gear.

The construction and operation of the clutch J J are as follows:

The part J has projections j on its inner face, (see Fig. 2,) and the part J has a springbolt, j, which engages therewith as the wheel J revolves, and thus rotates the shaft J. Pivoted to the outside of the part J by the pivot j is the lever J which engages with a projecting stud,j ,on the spring-bolt wherebysaid spring-bolt can be withdrawn from contact with the studs j Pivoted to the frame partB by a pivot, I), is a vibrating arm, B, which is operated by the treadleQan'd treadle-rod Q, and carries the detent b, which is or may be rendered ad justable by means of a setscrew, N.

This detent engages at all times with thelever J except when forced up by the action of the treadle, and thus holds the spring-boltj back outofenga gement with the projections-j", thereby allowing the wheel J to revolve loosely on the shaftJ and said shaft to remain motionless. When it'is desired to revolve the shaft J the detent is forced up out of'engagement with the lever by means of the treadle, the springbolt flies forward into engagement, and the shaft is thus rotated. As for the purposes of this invention it is only desirable that the shaft J should make one revolution at a time, the detent is allowed to drop back into place immediately after being raised, and thus catches the lever as the parts arrive for the first time at the position from which they started, and disengages the clutch, thereby stopping the motion of the shaft and the parts actuated thereby until such time as it is desired it should revolve again, when the detent is again raised and the operation repeated.

The vibrating lever K is provided with pivots k, which rest in bearings projecting from the frame part B, and is operated by the cam; wheel J on the shaft J, as will be best understood by reference to Fig. 8. This cam-wheel has its flat side up when the shaft J is at rest, and therefore the lever K occupies at most times a substantially vertical position. The drawings, however, show the detent I) raised and the shaft starting on its revolution. Gonsequently this lever, like the other parts, is shown in operated position. The leveris con nected to the'disk E by a connecting-rod, K which is jointed to both, and to the former preferablyby a form of universal joint, as is shown most plainly in Fig. 2, and when it is forced out of vertical position by the camwheel thus forces the disk E around a certain distance, and as before explained, by means of the angling slots 0 in said disk, closes in the clamps D upon the srction of pipe which is being operated upon.

The sliding block or sleeve L is operated by the cam-wheel J on the shaft J, which comes in contact with the anti-friction truck L which is secured to said sleeve by the stud-shaft 1 Like the cam-wheel J, this cam-wheel has its flat side up when the shaft ,J is at rest, and consequently the sleeve Lremains at the lowest point of its movement while the detent b is engaged with the lever J The arm M is secured to the sleeve L by means of the machine-screw m, and is or may be rendered adjustable by means of having the hole. through which said screw passes elongated, as shown, and providing an adjustingscrew, m. This arm is held in position laterally by the projections to on the frame parts A between which projections it passes, and which serve as the sides of a slide therefor.

The sleeve N rests in a socket in the upper branch of the arm M, as shown, and is permitted to revolve freely therein, (with the shaft H, to which it is secured by a spline,) while it is as freely permitted to move vertically on said shaft. Uponthis sleeve arcvlips 'n, to which are pivoted arms n, which are jointed at their other ends to the laterally-movable arms P which are rigidly connected to the shafts P upon which are the arms P, upon which the crimping-wheels or formers 1 are mounted. Thus an upward movement of the sleeve N (which, as hereinbet'ore explained, is caused by the cam-wheel L and the sleeve L and arnill/I) will force out the arms a, and

through them the arms P and P and the crimping-wheels P, which are thus enabled, as the whole device is continually rotating when the machine is in operation, to bear against the material of the section of pipe which is at the time in the machine, and form a circumferential crimp near the end of said pipe, the shape and size of which are determined by the shape, size, and position of said crimpingwheels or formers.

The circular head 0 is secured rigidly to the hollow vertical shaft H and revolves therewith. Its principal service is to carry the crimping-wheels and the parts which are immediately connected therewith. Slots 0 are preferably formed therein, through which the bearin gs wherein the wheels or formers P rest project, and by which the lateral movement of the same is defined.

The crimping-wheels or revolving formers 1? rest in sockets p, which in turn rest in bearings in the arms P. Said wheels are capable of revolving independently of each other and of the shaft G, and are all revolved about said shaft, as indicated. They are held back close to the center of the machine, when notexpand ed by the means described, by the springs p, as shown in Figs. 4 and 6. Except in the means of being operated they are not dissimilar to those shown in my Patent No. 224,974, before referred to, and in that are only different in employing a different form of togglejoint mechanism.

The treadle Q is for the purpose of enabling the operator to readily operate the detent b, as has been before explained. It is pivoted to a depending piece, a5, from the frame part A by a pivot, q, and has an upwardly-projecting rod, Q, attached thereto by the pivot g, which extends up and is attached to the arm 13 by the pivot q".

The operation of my invention may be recapitulated as follows: A section of sheet-metal pipe is inserted in the machine, one end passing down between the inside clamp or rest, F, and the outside clamps, D. The treadle is then operated to disengage the detent b. The shaft I being continually in motion during the operation of the machine, this puts the shaft J in motion, which, through the cam-wheel J, lever K, and disk E, throws the clamps D inwardly, firmly clasping the outside of the pipe. The same shaft, through the cam-wheel J sleeve L, arm M, sleeve N, and head 0, containing the-toggle-joint mechanism, expands the revolving formers or crimping-wheels P against the inside of the lower portion of the pipe-section, thus forming a circumferential crimp therein almost instantaneously. As soon as the cam-wheels come around so that their flat surfaces come in contact with the other parts against which they are intended to operate, the crimping-wheels recede, thcjaws D open, and the pipe-section is removed.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a machine for forming circumferential crimps in sheet-metal pipes, a driving-shaft, a counter-shaft, a loosely-running clutch-Wheel thereon, which is driven by a wheel on the first shaft, a clutch part on said counter-shaft, provided with a spring-bolt adapted to engage with the clutch-wheel, a lever adapted to disengage said bolt, a detent adapted to operate said lever to effect and maintain such disengagement until purposely withdrawn from'contact with said lever,acam-wheel on said coun tershaft, a lever adapted to be operated by said cam-wheel, and a plate, E, adapted to be operated by said lever, said several parts operating in combination with each other, substantially as set forth.

2. The combination, in a machine for forming circumferential crimpsin sheet-metal pipes, of a shaft adapted to rotate intermittently, having a cam-wheel thereon, a vibrating lever operated by said cam-wheel, and adisk adapted to be partially rotated by said lever and connected with the clamps D, which are thereby operated, substantially as set forth. 3. In a machine for forming circumferential crimps in sheet-metal pipes, a disk adapted to partially revolve, and which is provided with slots running at an angle to the radii thereof, through which project points from the clamps D, whereby said clamps, as said disk is turned, are caused to move toward and from a common center, in combination with the lever K and means, substantially as described, for operating the same, substantially as specified, and for the purposes as set forth.

4. The combination, in a machine for formin g circumferential crimps in sheet-metal pipes, of a horizontal shaft having a cam-wheel and adapted to revolve intermittently, a vertical shaft having a vertically-moving sleeve thereon, with which (or an an ti-friction truck thereon') said cam-wheel will engage, a toggle-joint mechanism, means for connecting said sleeve and said mechanism when they are some distance apart, and a set of revolving formers or crimping-wheels adapted to be expanded from each other by said toggle-joint mechanism, substantially as set forth.

5. The combination,with the crimping-wheelexpanding mechanism of a machine for form- IIS 7. The combination of the clamping mechanism of a machine for forming circumferential crimps in sheet-metal pipes, the shaft whereby said mechanism is driven, the clutch parts J J, the spring-bolt j, which is the means of engagementbetween said two parts, a lever, J for withdrawingsaid bolt, and a detent, b, for operating said lever, substantially as set forth.

8. The combination with the adjustable segments f, of the inside sleeve, f, and cone shaped nut f whereby said segments can be expanded and the size of the working portion of the inside clamp or rest, F, thus increased to compensate for the wear incident to its use or varied to accommodate variationsin the size of the pipe to be operated upon, substantially as set forth.

9. The combination, with the ring 0 upon which the pipe section rests while in the machine, of the adjustable brackets G, which sustain said ring, and by which the position thereof can be varied, substantially as setforth.

In witness whereof I have hereunto set my hand and seal at Indianapolis, Indiana, this 12th day of November, A. D. 1881.

WILLIAM A. WHEELER. s.]

In presence of O. BRADFORD,

O. L. THURBER.

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