US1088336A - Tube expander and flanger. - Google Patents

Description

W. 0. PROME. TUBE BXIANDER AND PLANGER. APPLICATION IILED I'EB517, 191a.

Patented Fb.24,19'14.

. dinally 'Wataga,

compound tool or two tools,

UNITED STATES PATENT orrron.

WILLIAM O. FROIVIE, OF WATAGA, ILLINOIS.

TUBE EXPANDER. AND FLANGER- To all whom it may concern Be it known that I, WILLIAM O. FRoMn, a citizen of the United States, residing at in the county of Knox and State of Illinois, have invented a new and useful Tube Expander and Flanger, of which the following is a specification.

My invention relates to devices for expanding that portion of boiler flues which lie beyond or inward of the flue-sheet, and for flanging or swaging the end portions of the flues which lie exterior thereto.

To some little extent boiler tubes or flues expand or contract as they are heated or cooled. The expansion is both longitudinal and transverse of the flue. With these basic facts in view the primary object of the invention is to provide an expander which will enlarge that portion of the flue which lies just beyond the flue-sheet in such manner that it forms a taper or wedge, which when the flue is heated will in expanding longituforce itself (after the fashion of a wedge) into the aperture provided in said sheet; and as it is crowding itself longitudinally thereinto, the transverse expansion will force it even more ture.

Minor objects will be in part definitely pointed out and in part obvious.

In the accom )anying drawing, illustrates a pre erred embodiment of the invention :Figure 1 is a longitudinal, central sectional view; Fig. 2, a similar view, the rollers reversed, from the positions shown in Fig. 1,and some of the parts not shown; Fig. 3, a plan, seen from the front end of the device, the parts in the same relative positions as in Fig. 1; and Fig. 4, an elevation, a fraginental detail. Fig. 1 illustrates the position of the rollers for expanding the inner portions of the fines; Fig. 2, the positions whlch they occupy in flaring the fine ends.

I have sought to provide a casingand rollers having novel relationship-the slots and rollers being of such relative sizes and outlines that a portion of the latter may project bodily therethrough, but another portion, being of slightly greater cross-section or diameter the width of the slots, will project only slightly therethrough. In these slots the rollers may be reversed or turned end-for-end in order that the two operations, heretofore requiring either a may be per Specification of Letters Patent.

tightly into the aperwhich- Patented Feb. 24, 1914.

application filed February 17, 1913. Serial No. 748,851.

casing having an annular flange 3 and an axial bore 5. Its Wallis provided with oblong rectangular slots 4.

6 designates a loose collar having bosses 7 9 is a restraininv ring, preferably of wire. These parts are old in the art and to them specifically I make no claim.

10 is a tapered mandrel having a ratchetfaced head 11 and a constricted tip 12, the latter threaded for the engagement of a nut 13.

14 is a tubular collar having internal threads 15 which receive a threaded plug 16' having a ratchet face 17 which is adapted to engage the face 11 in the manner of such devices.

18 is a coil spring for holding the-ratchet faces in engagement.

19 is a hand-lever loosely seated in the plug 16.

20 designates either one of a suitable number of rollers loosely and removably seat-ed in the casing 2.' Each has a hemispherical head portion 21 and preferably a similarly shaped foot portion 22. By reference to Fig. 1 it will. be seen that the contact of the head 21 against the casing wall, especially the front portion thereof, and thereby the friction, is, because of the hemispherical form thereof, much reduced. ,Each roller is tapered, the degree thereof being greater than that of the mandrel, so that when the rollers are occupying the positions shown in Fig. 1 a circle described by their points of greatest diameter, would be greater than that in any lower plane with the device considered as standing in the position shown in Fig. 1. The smaller end of the roller 'is of such diameter that it may pass bodily In operation, the fore end of the device is inserted into the end of a flue 23 until the bosses 7 rest against the flue-sheet 24, whereupon the operator will force the mandrel forward until it is sufficiently' tight, and will then operate it by means of the lever 19 which will impart rotary movement to the plug 16 to move the ratchet l1-l7 in l formed in an efficient manner andwith dessuch-a manner as to turn the mandrel, the friction'ot' which will rotate the rollers, each on its axis, and the rollers Will cause the casing to turn. The mandrel being forced forward the rollers will gradually expand that portion of the flue which lies just inward of the flue-sheet, until it assumes the conic contour shown at 11:. As thetflue is expanded (in use, by the heat) it Will elon- 3 said casing and said rollers being reversible in said slots and the smaller portion of each less in diameter than the width of the slot in which it lies and its taper greater than that of the mandrel, a ratcheted head on said mandrel, and ratcheted means for rotating said head.

2. Combined in a device of the character described, a tubular casinghaving slots in its wall, tapered rollers loosely arranged one in each slot, a tapered mandrel Working in said casing and adapted to actuate said rollers, the smaller end of each roller being of less diameter than the width of the slot in which it lies and its taper greater than that of the mandrel, a ratcheted head on said mandrel, and ratcheted means for rotating said head.

In Witness that I claim the foregoing I hereunto affix my signature, in presence of two subscribing witnesses.

WILLIAM O. FROME.

Witnesses:

H. M. RICHARDS, WEBB A. HERLOCKER.

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