US429263A - Hiram edwards - Google Patents

Description

(No Model v H. EDWARDS. MACHINE FOR READING THE ENDS 0F BOILER TUBES.

UNITED STATES PATENT OFFICE.

HIRAM EDl/VARDS, OF AURORA, ILLINOIS, ASSIGNOR OF ONE-HALF TO IVALT HOOVER, OF SAME PLACE.

MACHINE FOR BEADING THE ENDS OF BOILER-TUBES.

SPECIFICATION forming part of Letters Patent No. 29,263, dated June 3, 1890.

Application filed April 29, 1889.

Serial No- 309,046. (N0 model.)

To all whom it may concern.-

Be it known that I, HIRAM EDWARDS, of Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Machines for Beading the Ends of Boiler-Tubes; and I do hereby deelare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to novel devices adapted to be employed for beading the ends of boiler-tubes.

The object of the invention is to provide a device of this character whereby both ends of boiler-tubes may be beaded simultaneously after the same have been arranged in position and expanded within the flue-sheets.

The invention consists in the details of construction and combinations of parts hereinafter fully described, and pointed out in the appended claims.

In the drawings, Figure 1 is a vertical 1011- gitudinal sectional view of a device embodying my invention and represented as applied to one of a plurality of boiler-tubes secured at their opposite ends in flue-sheets. Fig. 2 is a vertical transverse sectional view taken on the line 2 2 of Fig. 1.

As shown in said drawings, A A are fluesheets of a boiler provided with correspondingly-located circular openings, into which boiler-tubes A A are inserted and suitably expanded, so as to be securely fixed therein.

My improved beading device comprises a shaft B, which is intended to pass through the tubes to be beaded and is somewhat longer than the same.

B B are guide-rings formed with central openings having notches or feather-ways Z) I), by which they may be passed over splines or feathers O O and held upon the shaft between the collars b b and pins b b and thus support said shaft B centrally with the tubes to be beaded.

O C are heads mounted loosely upon the ends of the shaft B and provided interiorly with notches or feather-ways c c, which receive splines or feathers O (3, formed on the end portions of the shaft 13. It will thus be seen that the heads O O are capable only of alon gitudinal movement upon said shaft. Near the ends of said shaft B, exterior to the splines or feathers O O, are screw-threaded portions 1) 1), upon which nuts 11 b are adapted to fit to hold the heads 0 0 upon the shaft. The extreme ends 11 19 of the shaft are squared to receive a crank B by means of which said shaft may be revolved; but it will be obvious that other forms of cranks or similar devices for revolving the shaft may be employed, as this forms no part of my invention. The inner face of each head 0 is provided with an annular recess or groove 0 having a ridge or rib c in its bottom.

D D are grooved rollers mounted uponradial pins d d, which pass through said recess or groove, and are so arranged that the grooves of the rollers will bear upon the ridge or rib c of the recess, and thus relieve the strain on the pins, and also prevent a lateral movement of the rollers. It will be obvious that after continued use the portion of the head in the rear of the rollers will be worn away, in which event new holes can be bored for the bearing-pins and the position of the rollers thus changed, so that they .will bear against other parts of the rib. It will also be manifest thatby means of the nuts I) b the heads C C may be carried or forced toward each other. I have shown in the drawings the said head provided with four rollers or headers, which number may be varied, if desired.

The parts of my invention being constructed and assembled as described, the operation is as follows: hen it is desired to bead the end of a boiler-tube, one of the heads 0 is removed and the shaft is passed through the tube, when said guide-rings will hold it centrally therein. The head is then replaced, and the heads are drawn against the proj ecting ends of thetubes to be beaded by means of one or both ofthe nuts 11 o .The heads are then revolved by means of the cranks, and the said rollers are caused to travel around said ends of the tubes. Either one or both of the nuts 11 b are moved slightly inward as the rollers revolve, so as to maintain a sufficient pressure of the rollers upon the

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