Improvements in the Manufacture of Tubes and in the Machinery employed therefor.
Year: 1891

page_text: Date of Application, 4th Apr., 1891
Complete Specification Left, 1st Jan., 1892-Accepted, 13th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Tubes and in the Machinery
employed therefor.
We, JOHN WOTHERSPOON and A. & J. STEWART & CLYDESDALE LIMITED
both of 41 Oswald Street, Glasgow in the County of Lanark, North Britain, Tube
Manufacturers do hereby declare the nature of this invention to
be as
follows:-
This invention which relates to improvements in the manufacture of tubes and in
the machinery employed therefor, has for its object to produce tubes or pipes
having one or more longitudinal indentations or grooves, such grooved tubes being
for use as loom beams and for other purposes.
In carrying out our said invention we form the mandril, over which the grooved
tube is made, with one or more longitudinal indentations or grooves, into which the
metal of the pipe is pressed during the rolling operation, by means of a corre-
sponding projection or tongue provided around the circumference of the roll.
Dated this 3rd day of April 1891.
JOHNSONS,
115, St. Vincent Street, Glasgow, Petitioners' Agents.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Tubes and in the Machinery
employed therefor.
We, JOHN WOTHERSPOON, and A. & J. STEWART & CLYDESDALE LIMITED,
both of 41 Oswald Street, Glasgow in the County of Lanark, North Britain, Tube
Manufacturers, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention which relates to improvements in the manufacture of tubes and in
the machinery employed therefor, has for its object to produce tubes or pipes
having one or more longitudinal indentations or grooves, such grooved tubes being
for use as loom beams and for other purposes.
In carrying out our said invention we form the mandril over which the grooved
tube is made with one or more longitudinal indentations or grooves into which the
metal of the pipe is pressed during the rolling operation by means of a corre-
sponding projection or tongue provided around the circumference of the roll. The
said mandril and roll being used in the ordinary way of making lap welded tubes
or pipes.
But in order that our said invention may be more readily understood we will now
describe the same with reference to the annexed drawings.
Figure 1 is a section of a tube or pipe made in accordance with our invention.
Figure 2 is a half cross section of a roll and
Figures 3 and 4, a section and plan of the mandril.
Referring to the said drawings we form the said tube or pipe A with one or more
longitudinal indentations or grooves a during the ordinary lap welding operation by
means of the roll B and mandril C. The said roll B being provided with a
projection or tongue around its periphery so as to press the tube into the
longitudinal indentation or groove c of the mandril C and so form the groove a of
the tube or pipe A.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
-
1st. The manufacture of tubes or pipes having one or more longitudinal inden-
tations or grooves, substantially as described and shown.
2nd. In the manufacture of tubes or pipes, forming the roll B with a projection
or tongue b, so as to work in the corresponding indentation or groove e, of the
mandril C, substantially as and for the purposes hereinbefore described and shown
in the annexed drawings.
Dated this 31st day of December 1891
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicants' Agents.