US524554A - Machine for lap-seaming sheet-metal tubes - Google Patents

Description

5 (NoModel.) M

F. B. `LOTZE.

MACHINE EOE LAP SEAMING SHEET METAL TUBES. No. 524,554. Patented Aug. 14, 1894.

I m Z UNITED STATES PATENT OFFICE.

FREDERICK B. LOTZE, OF AVONDALE, OHIO.

MACHINE FOR LAP-SEAMING SHEET-METAL TUBES.

SPECIFICATION forming part of Letters Patent No. 524,554, dated August 14, 1894.

Application filed December 16, 1593. Serial No. 493,831. (No model.)

the hot air pipes of furnaces. i

The invention will be first fully described in connection with the accompanying drawings, and then particularly referred to and pointed out in the claims.

Referring to the drawings in which like parts are indicated by similar reference letters wherever they occur throughout the various views-*Figure l is a side elevation of a machine embodying myimprovements. Fig. 2 is a vertical section of the same through line Fig. l looking to the left. Fig. 3 is a detail view in axial section upon an enlarged scalel of the seam formingwheels. Fig. 4 is a detail view in vertical section of the front and end of the upper bracket arm and bearing for the forming wheels shaft. Fig. 5 is a front elevation of the gage and support for the inj 11er end of the tube while the seam is being formed. Fig. 6 is a detail view in edge elevation ofthe bearing or restfor the opposite end of the tube. Figs. 7, 8 and 9 are sectional views of a portion of the tube illustrating the different-steps in forming the joint or seam which unites the sections.

The head stock of the machine is mounted in a hollow column A, which is secured in any suitable manner upon the stand B, the head bracket C', and on top of the head stock is a `similar bracket C2, these brackets furnish the supports for the outer bearings of the shafts D. and E, the upper one D, carrying the forming wheels F. and G. and the lower one carrying the plain anvil wheel H, the rearbearings d, and e, for'the shafts D. and E. having their edges grooved to fit the V shaped bearings in the rear upright c', of the head stock C, the

upper box of the bearing e, and the lower box of the bearing d, being united by rods d. The shafts D. and E. are geared together by the cog wheels e', and d2, which are secured upon the rear ends of the shaftsD, and E.

The bearings for the shaft E, are fixed, while the front bearing cl3, of the shaft D, is arranged to slide vertically between lugs c2, which project downwardly from the forward end of the bracket arm O2, the bearing has an inwardly projecting lug d, to overlap the end of the spring c3, which is secured underneath the arm C2, the pressure of the spring being upward.

Tapped in the forward end of arm C2, is a tail screw c", the 4diminished lower end of which enters the perforation in the bearing cl3, by means of this 4'screw the bearing is forced downwardly to bring the wheels F. and G. in the direction of the wl1eel H,when the screw c4, is turned backward the spring c3, forces the bearing up and separates the seam forming wheels.

The adjacent `faces of the seam forming wheels F, and G, are formed the one counter to the other, the face of thej wheel` F, being dished or concave, the opposite face of the wheel G, is convex or beveled counter to the inwardly inclined bevel of the wheel F. The wheel G, is secured upon the end of the shaft D. As shown the end of the shaft is screw threaded and the wheel G, tapped and screwed up tightly against the washer g, ,the screw being a left hand one so that in use the tendency is to tighten the wheel upon the shaft. The wheel F, is splined upon the shaft D, and the bore of both wheels is enlarged to receive a strong spiral spring I, the office of which is to hold the wheel F, firmly against the collar f, when the shaft is forced forward in its bearing to separate the wheelsF and G.

The shaft D is arranged to slide longitudinally in its bearings for the purpose of forcing the wheel G, away from the wheel F, or drawing it nearer to said wheel F. The shaft D, is moved longitudinally by a lever J, the opposite ends of which are coupled to loose collars d5, and lr., which are held respectively on the shafts D, and K, between fixed collars d, and 7c', the arms of the lever IOO tical web by the fulcrum pin j.

Vthe flange of the bracket and have their diminished ends screw threaded to receive nuts to hold the bed plate firmly in position. The

center of the bed plate arches over the shaft` E. Upon this bed plate is iitted to slide a gage M, which is formed of segments of dif ferent diameters and has a rearwardly pro-Y jecting rod m, which passes through the arm. l', which projects up from the bed plate and has a set screw m', to hold the gage M, in

any desired position on the bed plate. The purpose of the rod m, and set screw m', is to adjust the gage to the different lengths of tubes which are to be united.

Secured upon the stand B, is a hollow column N, and n, is a shaft of 4 a yoke n', which 3 shaft fits into the hollow column N, and is vertically adjustable by means of perfora-l tions passing through both the column and; the shaft to receive a pin by which the yoke v is elevated or lowered, the yoke n', is fitted with vulcanite or fiber friction wheels fm2, upon which ithe tube rests. There are differ-v ent sizes of these yokes to accommodate the different sizes of tubes to be seamed or united upon the machine.

The operation of the machine is as follows`:--Two sections of tube to be united,V

having had their opposite ends formed by the machines now in common use, are placed together as shown in Fig. 7, the two parts are then placed in position to be operated upon'` by the machine, the inner end of one tube resting upon the larger segment m2, and the opposite end resting in the support n. The wheels F, and G, are separated sufficiently to permit ithe bead on the end of the tube to pass between them, the wheels F, and G, are

then brought down upon the wheel H, wheels 1 F, and G, are then brought together by turning the small hand wheel h4, until the parts embraced by the wheels are brought together as shown in Fig. 8. The shaftsD, and E, are then revolved by the crank E', revolving the tubes at the same time and closing the joints entirely around at an inclination to the axis of the tube as seen in Fig. 8. The wheels F,

and G, are then separated and elevated by means of thc tail screw c4. The inner end of the tube is, then placed upon the smaller segment lmi", and the grooved portion g', of the wheel brought over the inclined seam of the tube, thepwheel G, is then brought down over 'the inclined seam pressing it down flat as seen in Fig. 9, thenby revolving the crank the seam is fiattened down and the joint completed.

It is obvious that the column A,head stock C, and the brackets C', and C2, may be cast in a single piece, and that many other merely mechanical changes may be made in the device without' departing from the spirit and scope of my invention.

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

1. In a tube scanning machine the combination of the supporting column, the head stock having fixed brackets projecting laterally from one side thereof, and parallel with each other, the parallel shafts D, E,n1ounted in said head stock the said shaft D, being adjustable longitudinally in its bearing and at its forward end to and from the shaft E, the cog wheels gearing the shafts together, the plain wheel H, on the end of shaft E, the forming wheels F, and G, on the end of shaft D, said wheel G, being fixed to move longitudinally with the shaft and the wheel F, splinedto permit -the shaft to move longitudinally through it,

and means such as shown to move the shaft D, longitudinally in its bearings and vertically to close and separate the seam forming wheels F, G, H. A

2. The combination of the head stock, the fixed shaft F., having wheel H, secured thereon the longitudinal adjustable shaft D, mounted in said head stock parallel with shaft E, and above it, the cog wheels e', d2, gearing the shafts together, said shaft D, being longitudinally adjustable in its bearings and its forward end vertically adjustable in relation to wheel H, the wheel G, grooved around its periphery and beveled upon its inner face said wheel being secured upon the end of the shaft E, and the wheel F, having its face concave and splined upon shaft D, the bearing d3, of the outer end of the shaft D, fitted to slide vertically in the head stock, the screw shaft K, the lever L, fulcrumed in the head stock and connected to shafts K, and D, to move the shaft D, longitudinally in its bearings and the tail screw c4, to adj ust the forming wheels to or from the wheel H, substantially as shown and described.

3. The combination of the head stock the parallel shafts mounted therein, one of said shafts being fixed and the other one movable, the wheel H, mounted upon the fixed shaft and the wheels F, G, upon the movable shaft, the bearing d3, fitted to slide in the head stock, the tail screw for forcing the bearing down and bringing -theforming wheels in the direction of the wheel H, the spring c3, to force the bearing up when the tail screw is reversed, the bed plate'L, and the adjustable seg mentalbearing M, fitted to slide upon the bed plate L, and support the inner end of the tube while the seam is being formed,substantial1y as shown and described. l

4. The combination substantially as hereinbefore set forth in a tube seaming machine, of "a pair of seam forming rolls, having their IOO ITO

Isc,

adjacent faces inclined in relation with their axes and movable to and from each other for the purpose of uniting the opposite ends of two tube sections, and inclining the partially formed seam atan angle to the tube, one of said rolls having a grooved periphery counter to the ridge formed by the completed seam for the purpose set forth.

5. The combination of the shafts D, E, geared together, the rolls F, G, H, on the ends of said shafts, the bed plate L, and the segmental support M, adjustable upon said bed plate, substantially as shown and described.

6. The combination of the stand, the sup-

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