Improvements in Machinery for Rolling Metal Bars or Tubes.
Year: 1890

page_text: Date of Application, 16th Jan., 1890
Complete Specification Left, 16th Oct., 1890-Accepted, 16th Feb., 1891
[Communicated from abroad by HERMANN MOERCHEN, of Alten, in the German
Empire.]
Improvements in Machinery for Rolling Metal Bars or Tubes.
I, HAROLD IMRAY, of No. 28, Southampton Buildings, Chancery Lane, in the
County of London, Fellow of the Institute of Patent Agents, do hereby declare
the nature of this invention to be as follows:-
For rolling metal bars or tubes, it is usual to arrange several pairs of rolls, some
horizontal, some vertical, in a row, so that the bar or tube passes through them in
succession. These pairs of rolls are usually driven by gearing from one motor, and
therefore their respective speeds do not accommodate themselves to the greater or
less extension of the metal, so that sometimes the metal between one pair of rolls
and the next tends to buckle or to become upset when the speed of the second pair
is too small, sometimes the metal is too much drawn out when the speed of the
second pair is too great. The strain on the machinery is thus often rendered
excessive.
In order to provide against this, instead of working all the rolls by gearing from
one motor, I provide each pair with a separate motor, which may be a steam or
other engine or may be driven by friction or other slipping gear with power limited
to that necessary for passing the bar or tube through the pair of rolls, independently
of any extending or compressing strain produced by the pairs of rolls before or
behind. Each pair of rolls and their motor can thus accommodate their speed to
that of the passing metal, without imposing any excessive extending or compressing
strain on the parts of the bar or tube between that pair and the next pair on
either hand.
In many cases, especially when thi ntubes are rolled over a stationary mandril, it
is of advantage to apply, beyond the rolls, a positive drag as in a draw bench, with
or without dies or tribletts. I drive the draw bench by a separate motor, and the
rolls being also driven as above described by separate motors, the speed of each pair
accommodates itself to that of the metal as determined by the draw bench.
Dated this 16th day of January 1890
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Machinery for Rolling Metal Bars or Tubes.
I, HAROLD IMRAY, of No. 28, Southampton Buildings, Chancery Lane, in the
County of London, Fellow of the Institute of Patent Agents, 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:-
For rolling metal bars or tubes, it is usual to arrange several pairs of rolls, some
horizontal, some vertical, in a row, so that the bar or tube passes through them in
succession. These pairs of rolls are usually driven by gearing from one motor, and
therefore their respective speeds do not accommodate themselves to the greater or
less extension of the metal, so that sometimes the metal between one pair of rolls
and the next tends to buckle or to become upset when the speed of the second pair
is too small, sometimes the metal is too much drawn out when the speed of the
second pair is too great. The strain on the machinery is thus often rendered
excessive.

page_text: In order to provide against this, instead of working all the rolls by gearing from
one motor, I provide each pair with a separate motor, which may be a steam or
other engine or each pair may be driven by any known friction clutch or other
slipping gear with power limited to that necessary for passing the bar or tube
through the pair of rolls independently of any extending or compressing strain
produced by the pairs of rolls before or behind. Each pair of rolls and their motor
can thus accommodate their speed to that of the passing metal, without imposing
any excessive extending or compressing strain on the parts of the bar or tube
between that pair and the next pair on either hand.
In many cases, especially when thin tubes are rolled over a stationary mandril, it
is of advantage to apply, beyond the rolls, a positive drag as in a draw bench, with
or without dies or tribletts. I drive the draw bench by a separate motor, and the
rolls being also driven as above described by separate motors, the speed of each
pair accommodates itself to that of the metal as determined by the draw bench.
Figure 1 of the accompanying drawings is an elevation partly in section shewing
two pairs of horizontal rollers A and B arranged in combination with a pair of
vertical rollers C so as to operate on one continuous bar or tube; Figure 2 is a side
view partly in section of the rollers A. These rollers A are driven by a shaft D
from any suitable motor and the rollers B are similarly driven by another motor.
Also the rollers C are driven by bevil gear from a shaft E. The three motors are
independent of one another, and when additional sets of rollers are arranged to
operate on the one bar, they are in like manner driven by independent motors as
above described.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
Working the sets of rollers which operate successively on a bar or tube, each set
by an independent motor, as and for the purpose herein set forth.
Dated this 16th day of
1800
A EL & IMRAY,
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