IMPROVEMENTS IN THE CONSTRUCTION OF SHEET METAL ELBOWS OR CURVED PIECES FOR PIPES OR TUBES
Year: 1870

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, for the Invention of
"IMPROVEMENTS IN THE CONSTRUCTION OF SHEET METAL ELBOWS OR CURVED
PIECES FOR PIPES OR TUBES."-A communication from abroad by
Frederick Hoeltge, of Covington, Kentucky, United States of
COMPLETE SPECIFICATION filed by the said George Haseltine at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 30th November 1870, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," Southampton
Buildings, London, send greeting.

page_text: WHEREAS I am in possession of an Invention for "IMPROVEMENTS IN
THE CONSTRUCTION OF SHEET METAL ELBOWS OR CURVED PIECES FOR PIPES OR TUBES,"
and have petitioned Her Majesty to grant unto me, my executors,
administrators, and assigns, Her Royal Letters Patent for the same, and
have made solemn Declaration that it has been communicated to me 5
from abroad by Frederick Hoeltge, of Covington, Kentucky, United
States of America.
NOW KNOW YE, that I, the said George Haseltine, do hereby declare
that the following Complete Specification, under my hand and seal,
fully describes and ascertains the nature of the said Invention, and in 1
what manner the same is to be performed, in and by the following
statement, reference being had to the accompanying Drawing forming
a part of this Specification.
This Invention relates to a pipe elbow, and consists in the formation
from one piece of sheet metal of an elbow for stove and other pipes.
DESCRIPTION OF THE DRAWING.
Figure 1 is a perspective view of the improved elbow; Figure 2 is a
longitudinal section of the same. To construct this elbow a piece of
sheet metal of the desired length and width is bent in the form of a
cylinder, the lapping edges are connected together at each end by 1
rivets a, a, it is then placed upon a former by means of which the metal
upon one side of the cylindrical pipe is caused to buckle outwardly,
forming the ribs or corrugations A upon the surface of least curvature.
These corrugations extend radially over one-half or two-thirds of the
curved section of the elbow. The surface B of greatest curvature of the 1
elbow is smooth. The ends C, C¹, are devoid of corrugations, they enter
or receive the straight lengths of pipe which being at an angle with each
other are connected together by the elbow.
The usual manner of constructing elbows is to crimp together short
segments of cylindrical pipe, a tedious and lengthy operation when
compared with the manner of forming the elbow from one piece of sheet
metal, as herein shown and described.
This corrugated pipe elbow has the advantage over those of different
construction in strength and duribility, as well as in economy of time
and material.

page_text: Having thus described the said Invention as communicated to me
by my foreign correspondent, I claim, the corrugated pipe elbow
constructed substantially as herein shewn and described.
In witness whereof, I, the said George Haseltine, have hereunto
set my hand and seal, this Thirtieth day of November, in the
year of our Lord One thousand eight hundred and seventy.
Witness,
W. J. LOWE.
GEORGE HASELTINE. (L.S.)