US1360815A - Boiler and tank spud - Google Patents

Description

I A. G. SUTTILL.

BOILER AND TANK SPUD.

APPLICATION FILED SEPT. 9. 1919.

1,360,815, Patented NOV. 30, 1920.

' B W jz 3 flbe/vf. Sufi/ll UNITED STATES PATENT OFFICE.

ALBERT G. SUTTILL, OF WATERTO'WN, MASSACHUSETTS, ASSIGNOR TO RIVERSIDE BOILER WORKS, INC., OF CAMBRIDGE, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

BOILER AND TANK SPUD.

Application filed September 9, 1919. Serial No. 322,740.

To all whom it may concern:

Be it known that I, ALBERT G. SUTTILL, who have taken out my first papers of citizenship in the United States, residing at Watertown, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvemenets in Boiler and Tank Spuds, of which the following is a. specification.

The present invention relates to boiler and tank manufacture, and has more particular reference to the structure and installation of spuds used for subsequently tapping or connecting pipes or the like in the boiler or tank.

An object of this invention is to so construct and install a spud in a tank or boiler as to offset leakage and displacement of the spud in the boiler plate during the tapping or threading of the spud and during the screwing of a pipe or the like into the spud, which tapping and securing of the pipe in the spud is done after the spud has been secured or installed in the tank or boiler.

Another object of the invention resides in so constructing and positioning a spud in the boiler plate as to have all of the advantages derived from a welded boss, which is sometimes used but which has disadvantages in the manufacture of the boilers and tanks. I

' The above, and various other, objects and advantages of this invention will be in part described in, and in part understood from,

the following detailed description of one embodiment of the invention, the same being illustrated in the accompanying drawings, wherein- Figure l is an end elevation of a spud constructed according to the present invention.

Fig. 2 is a side elevation of the same.

Fig. 3 is a longitudinal section taken through the spud as applied to a boiler plate and prior to being set.

Fig. 4 is a similar view showing the spud set and after the same has been tapped and a portion of pipe secured therein.

Fig. 5 is a transverse section taken on the line 55 of Fig. 4 and showing the polygonal opening in the boiler plate to receive the spud.

Referring to the drawing, wherein like parts are designated by similar numerals of reference throughout the several views, 10 designates the shoulder, flange or head of a spud which is provided with a shank 11 ex- I tral opening 12 therethrough which is of substantially the desired diameter and which is usually unthreaded. The inner end of the shank 11 has a flared inner wall 13 which forms a flaring end to the opening 12 and presents an inclined annular face facilitating the swaging or upsetting of theinner end of the shank as will be hereinafter pointed out.

That portion of the shank 11 adjacent to the shoulder 10 is provided, in the present embodiment, with a plurality of projections of angular formation which provide angularly-disposed faces which extend from the shoulder 10 and which are ofa width equal substantially to the thickness of the boiler plate, through which the shank 11 is adapted to extend. As shown in the drawing these angularly-disposed faces are designated at 14.

For the purpose of installing the spud according to this invention the boiler plate 15 is provided with a polygonal opening corresponding in shape to the cross section of the shank 11 at that portion thereof upon which the fiat faces 14 are formed, the faces 14: being adapted to fit snugly-in the polygonal opening, as shownin Fig. 5 to prevent turning of the spud in the boiler plate.

When the spud is positioned through the boiler plate with the shoulder 10, lying against one side thereof, the outer end of the shank 11 is swaged or upset by being hammered down by hand, air machine, or drop hammer until a leak-proof joint is formed. This spreading and overturning of the end of the shank is facilitated by the conical extremity of the shank incident to the flaring wall 13 and the spud, when thus upset, is rigidly sealed in the boiler plate 15, as shown in Fig. 4, and is held from turning there in even when the hole though the spud is tapped and when the pipe connection is made in the spud.

It has heretofore been found in practice with the usual form of spud that the latter, during the tapping operation, frequently turns in the boiler plate, and that the spud also" frequently turns during the screwing in of the threaded end of a pipe. When the spud is thus turned under either of these conditions, it causes the spud to become loosened in the boiler plate to such an extent as to leak and it is diflicult, if not impossible,

- to stop such leakage unless the spud be reto this invention such leakage cannot take place as the spud is locked in the boiler plate from turning and there is no danger of dis turbing the relative positions of the shoulder and the'svvaged end of the spud against the opposite sides of the boiler plate.

It is of course understood that various changes and modifications may be made in the above specifically-described embodiment of this invention Without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claim.

What is claimed is: v

A spud for use in boilers and tanks, comprising a shouldered head adapted to lie against the face of the Wall of a boiler" or for insertion through a polygonally formed opening in said wall of the boiler or tank,

- said shank having exterior polygonal faces corresponding to said opening in the boiler or tank Wall and extending from said shouldered head and being of a Width substantially equal to the thickness of said boiler or tank Wall and adapted to fit in the polygonal opening thereof to hold the shank from turning in the opening, the outer portion of the shank being substantially cylindrical and having an endwise flaring inner wall, the bottom of the latter being adapted to lie substantially in line with the surface of the boiler or tank Wall, reducing the thickness of the end of the shank, Wherebysaid reduced and cylindrically formed end of the shank niay be easily and uniformly swaged and rounded over against the opposite face of said boiler or tank Wall. I ALBERT Gr. SUT TILL.

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