US325244A

US325244A - Habeisost hayes

Info

Publication number: US325244A
Authority: US
Publication date: 1885-09-01
Anticipated expiration: 1902-09-01

Description

UNITED STATES PATENT OFFICE.

HARRISON HAYES, OF PORTLAND, MAINE.

TUBE-EXPANDER.

SPECIFICATION 'forming part of Letters Patent No. 325,244, dated September 1, 1885.

(No model.)

o all whom it 'may concern:

Be it known that I, HARRISON HAYES, a citizen of the United States, residing at Portland, in the county of Cumberland and State oi' Maine, have invented a new and useful SteanrBoiler-Tube-Fastening Tool, of which the following is a specilication.

My invention relates to improvements in steam-boilertube-fastening tools, in which three or more single rolls are used to fasten the tube in the tube-sheet of steam-boilers; and the object of my improvement is to form a shoulder each side ol' the tube-sheet and at the same time force the tube rmly against the tubesheet between the shoulders, so as to produce a fastening stronger and better' than can be obtained by the use of a tooll with sin gle rolls. I attain this object by the use of the tool illustrated in the accompanying drawings, in which- Figure l is a side View of the tool; Fig. 2, an end view of the same; Fig. 3, a sectional View on the line df, Fig. l. Fig. 4 is a view of the head of the mandrel; and Fig. 5, a sectional View ofthe tool on the line g h, Fig. 2, and of a tube and tube-sheet after being fastened.

Similarletters refer to similarparts througlr out the several views.

A represents the stock of the tool, in one end of which are three slots at equal distances from each other, and each of which contains three hardened steel rolls, a b c, of varying diameters and lengths, according to the size of the shoulders required and the thickness of the tube-sheet. a and c are slightly larger in diameter than the roll b, and the length of b is proportioned to the thickness of the tubesheet.

The three slots in which the rolls a I) c are placed are elongated, so that the rolls have a little motion forward and back from the center, but cannot fall from the slots laterally. They are put in the slots at the end and held in place by the ring D, which is fastened to the stoel: A by the machine-screws e e e.

B is a tapering mandrel to be driven into the central hole of the stock A, so as to iorce the rolls a b c into position to fasten the tube. Said mandrel is provided with holes, as at F, Fig. et, in its largest end, in which to insert a rod for the purpose of revolving the tool and completing the fastening.

The operation of this tool is as follows: The stock A, Fig. 5, is placed in the end of the tube C, so that the rolls Z1 b-b shall be opposite the tube-sheet E, the tapering mandrel is then driven into the stock A until the rolls b I) b are pressed firmly against the tubesheet E and the rolls a a e c e c have formed a shoulder each side of the same, then a rod is pnt in the hole F, Fig. et, and the whole revolved, forming a strong, even fastening, as shown. The advantages of these sets of rolls ce a a b Z b c c o over single rolls are greater strength in the tool and a better fastening of the tubesfgreater strength because of three short bearings on the mandrel, instead ofl one long one, and abetter fastening because of the shoulder each side of the tube-sheet.

Having fully described my invention, what I desire to claim and secure by Let-ters Fatent is- The combination, in a steam boiler tube fastening tool, of three ormore sets of rolls, a b c, in a stock, A,with a tapering mandrel, B, having a hole or holes in its largest end for the purpose of inserting a rod to revolve the tool, all as shown, described, and specified.

HARRISON HAYES.

'Witnessesz A. M. MILLETT, WILsoN SPRAGUE.