Improvements in the Means or Mode of Tapering, Reducing, and Ornamenting Metallic Tubes.
Year: 1889

page_text: Date of Application, 24th Aug., 1889
Complete Specification Left, 24th May, 1890-Accepted, 16th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Means or Mode of Tapering, Reducing, and
Ornamenting Metallic Tubes.
I WILLIAM HENRY BUTLER, of 1 Lombard Street, Birmingham, Machinist do
hereby declare the nature of my said invention to be as follows:-
My invention is for the purpose of tapering, reducing the size, or ornamenting the
surface of metallic tubes, or for combinations of these processes.
In carrying my invention into effect I provide a pair of rolls, with the ordinary
housings and chocks and I gear these rolls together by means of suitable toothed
wheels so that when one roll rotates the other must also. I give the ordinary
motion of rotation to these rolls in any usual well known manner. The distance
of the rolls apart from centre to centre can be adjusted as usual.
In tapering tubes by my invention I cut away, a flat part on each roll, and on
that part of each roll which is left cylindrical, which may be termed the acting
part, I form a tapering groove, the groove extending circumferentially around the
cylindrical part of the rolls.
The rolls are so geared together that the large ends of these grooves are in
juxtaposition and form an opening into which the leading end of the tube to be
tapered is inserted. The rolls are then caused to revolve in such a direction, and
with such a pressure as to advance the tube between the rolls. As the rolls con-
tinue to rotate, the aperture between them formed by the juxtaposition of the
tapered grooves becomes smaller and smaller in cross section area, the tube itself
which is passing between the rolls has to accommodate itself to the lessening size
of the aperture, and consequently, assume a taper shape; that is to say, its
dimensions in cross section become less and less. This process continues until by
the rotation of the rolls the flats previously mentioned come into juxtaposition;
this enlarges the aperture between the rolls to a very considerable extent, and the
tube which has now been tapered falls out finished.
Instead of forming the grooves of one uniform taper they may be parallel but
of different sizes in different parts of their length thus reducing the size of the tube
step by step instead of by uniform taper. Or I may use a combination of different
kinds or degrees of taper, or of taper and parallelism in different parts of the length
of the grooves.
I may cut or engrave ornamental designs in these grooves or in parts of them and
then the tube on passing through the rolls will be ornamented wholly or in part as
well as tapered or reduced.
More than one pair of grooves may be cut in each pair of rolls for graduated
rolling if desired and the sizes of the flat parts may differ in different parts of the
length of the rolls.
Dated the with A1000
COMPLETE SPECIFICATION.
Improvements in the Means or Mode of Tapering, Reducing, and
Ornamenting Metallic Tubes.
I WILLIAM HENRY BUTLER of 1 Lombard Street Birmingham Machinist, do
hereby declare the nature of my said invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:
My invention is for the purpose of tapering reducing the size or ornamenting the
surface of metallic tubes or for combinations of these processes.

page_text: In carrying my invention into effect I provide a pair of rolls with the ordinary
housings and chocks and I gear these rolls together by means of suitable toothed
wheels so that when one roll rotates the other must also. give the ordinary motion
of rotation to these rolls in any usual well known manner.
rolls apart from centre to centre can be adjusted as usual.
The distance of the
For tapering tubes by my Invention I cut away a flat part on each roll and
on that part of each roll which is left cylindrical of which may be termed the
acting part I form a tapering groove the groove extending circumferentially
around the cylindrical part of the rolls.
The rolls are
so geared together that the large ends of these grooves are in
juxtaposition and form an opening into which the leading end of the tube to be
tapered is inserted. The rolls are then caused to revolve in such a direction and
with such a pressure as to advance the tube hetween the rolls, as the rolls continue
to rotate the aperture between them formed by the juxtaposition of the tapered
grooves becomes smaller and smaller in cross section area, the tube itself which is
passing between the rolls has to accommodate itself to the lessening size of the
aperture and consequently assumes a taper shape that is to say its dimensions in cross
section become less and less. This process continues until by the rotation of the rolls
the flats previously mentioned come into juxtaposition. This enlarges the aperture
between the rolls to a very considerable extent and the tube which has now been
tapered falls out finished.
Instead of forming the grooves of one uniform taper they may be parallel but of
different sizes in different parts of their length thus reducing the size of the tube
step by step instead of by uniformi taper. Or I may use a combination of different
kinds or degrees of taper or of taper and parallelism in different parts of the length of
the grooves.
I may cut or engrave ornamental designs in these grooves or in parts of them and
then the tube on passing through the will be ornamented wholly or in part as well as
tapered or reduced.
More than one pair of grooves may be cut in each pair of rolls for graduated
rolling if desired and the sizes of the flat parts may differ in different parts of the
length of the rolls.
And in order that this my said Invention may be more fully understood I shall now
proceed more particularly to describe the same and for that purpose I shall refer to
the several figures in the sheets of drawings hereunto annexed the same letters of
reference indicating corresponding parts throughout all the figures.
No. 1 SHEET OF DRAWINGS.
Fig. 1 is a view front elevation of a pair of rolls provided with the tapering grooves
mounted in frame with toothed wheel gearing.
Fig. 2. is a view in elevation of the same.
Fig. 3. is a section of view of roll for tapering as Fig. 1.
Fig. 4. is a plan view of roll developed.
Fig. 5. is a section of view of roll for reducing the tube in size step by step.
Fig. 6. is a view of tube reduced and ornamented by roll as Fig. 5.
No. 2 SHEET OF DRAWINGS.
Fig. 7. is a view front elevation of a pair of rolls provided with helical grooves
tapering to be mounted as Fig. 1.
Fig. 8 is a plan view of roll Fig. 7 developed.
Fig. 9 is a view front elevation of a noir of walla non-ital
1
1

page_text: tapered in passing to the entering end e-the rolls a a rotating and advancing the
tube and tapering it until the flats b. b. are again reached and are opposite one
another and such space formed as to allow the tapered tube to fall from the
leaving end f. 9 are steps for producing a diminishing tube in size by parallel
stages as Fig. 6 and ornamenting (1 being plain, 2 reeded, 3 ornamented).
In Fig. 7. 8. I shew a modification being a pair of rolls a a with a spiral
tapering groove c upon the cylindrical surface of each.
The tube to be tapered enters at e and leaves at f.
In Figs. 9. 10. 11 I shew my mode of ornamenting tubes during the process
of tapering, the tapered groove c in rolls a a are engraved or impressed by the
usual means with any suitable design. A difficulty would arise in producing the
ornament clear upon each of the sides on leaving the rolls if constructed as above set
forth but to remedy this I make the rolls a a divisible at h while the rolls a¹ are
secured to the axis i, the rolls a slide in the groove; thus permitting a² to be
brought from a' where the ornamentation is effected, and well defined.
The above being my said invention I wish it to be understood in conclusion
that I do not confine myself to the precise details or arrangement of parts as shewn on
the accompanying of sheets of drawings but that I hold myself at liberty to alter
or modify the same without departing essentially from my said invention.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what 1
claim is
1st. The construction and application of two rolls a a with the flats b b the
cylindrical surface provided with one or more tapering grooves c as Figs. 1. 2. 3. 4 for
tapering tubes, or two rolls a a as Fig. 9. 10. 11. for tapering and ornamenting
tubes, or two rolls a a as Fig. 5 provided with steps g for reducing and ornamenting
as Fig. 6. Or two rolls a a as Figs. 7. 8. with spiral tapering grooves c, substantially
for the purpose as hereinbefore set forth and described.
2nd. The general construction combination and arrangement of parts as herein-
before described in the foregoing Specification and illustrated on the accompanying
sheets of drawings the whole forming :-"Improvements in the means or mode of
tapering reducing and ornamenting metallic tubes."
Dated 24th May 1890.
THOMAS KENDRICK,
Agent for Applicant.