US1146050A - Boiler-tube. - Google Patents

Description

F. BURKETT.

BOILER TUBE- APPLICATION FILED SEPT. 17. 1912.

1,146,,U5UB Patented July 13, 1915.

Witnesses Attorneys,

ccunuum PLANOGRAPH $0., WASHINGTON, D. c.

FRANK BURKETT, 0F IJUFKIN, TEXAS.

BOILER-TUBE.

Specification of Letters Patent.

Patented July 13, 19915.

Application filed September 17, 1912. Serial No. 720,861.

To all whom it may concern:

Be it known that I, FRANK BURKETT, a citizen of the United States, residing at Lufkin, in the county of Angelina and State of Texas, have invented a new and useful Boiler-Tube, of which the following is a specification.

The present invention relates to improvements in boiler tubes, the primary object of this invention being the provision of a noncorrodible sheet engaging end for the tube, the same being so constructed and arranged as to be readily sweated or brazed to the usual steel or iron boiler tube, such construction reducing the cost of installation and removal and at the same time a more durable securing means between the tube and sheet.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawingsFigure 1 is a sectional View through a boiler sheet with one of the boiler tubes attached thereto. Fig. 2 is a longitudinal sectional view through the boiler tube adjacent to the non-corrodible end thereof.

Referring to the drawings, the numeral 1 designates the boiler sheet and 2 the tube. The steel section 3 of the tube is slightly tapered as at 4 for the reception of the inner tapered end 6 of the non-corrodible sheet engaging tube or end 7, which is preferably made of copper or a malleable non-corrodible metal having the same qualities as copper. The meeting ends of the section 3 and end 7 are brazed by suitable brazing metal 5 and thus a homogeneous junction isproduced between the copper and steel, as clearly shown in Fig. 2. As shown in Fig. 1, the extreme outer end of the non-corrodible section 7 is expanded as at 8 and thus provides a water t1ght joint between the tube and sheet, and a means whereby the tubes may be readily removed and replaced when necessary.

Bv constructing the ends of boiler tubes as herein set forth, a strong tube is produced, and as the connection with the boiler sheet is made by expanding the malleable non-corrodible connecting end therewith, it is evident that the cost of installation as well and the initial cost of the tube is reduced.

With the present boiler tube, the sudden contraction and expansion that often cracks and breaks steel and iron tubes, does not have this bad effect, and thus this tube is more durable and inexpensive in use.

What is claimed is:

A boiler tube, including a main section having its end tapered exteriorly to a relatively thin rim, a non-corrodible boiler sheet engaging nipple, one end of which is of a reduced diameter, but the thickness of the walls of which are the same throughout, a portion of said end being inserted within and out of contact with the mouth of the main section, and a uniting brazing metal filling the circumferential space between the telescopic portion of the main section and the nipple and surrounding the nipple as a continuation of the tapered relatively thin rim of the main section, whereby a reinforced and water tight joint is provided both by the incased end of the nipple and the uniting metal about the nipple.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

FRANK BURKETT.

Witnesses:

W. L. EFFINGER, O. H. WEISE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner oflatents, Washington, I). G.

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