Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 19th day of June 1897.
I, JOHN IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Consulting Engineer and Chartered Patent Agent, do hereby
declare the nature of this invention to be as follows:-
In the Specification of my foreign correspondent No. 3371 of 1891 was described
the step by step rolling of tubes on a mandrel by giving the work a step by step
movement between gapped rollers revolving or reciprocating in stationary bearings.
According to the present invention the rollers themselves are made to move
to and fro longitudinally along the work which has either a continuously advancing
movement or periodic to and fro movements.
The rolls are mounted in standards that are caused by cranks eccentrics or the
like to rock forwards and backwards.
Toothed ares on the axis of the rolls, roll along toothed racks which are
also caused to move, preferably in a direction opposite to that in which the
standards move, the rolls being thus made to roll forwards and backwards along
the work.
The rolls may revolve always in one direction whilst they are making their
forward and backward longitudinal movements, and instead of rolls eccentric
segments may be employed.
Two pairs of rolls with vertical and horizontal arcs may respectively operate
upon the work the one pair acting on it above and below, the other on the right
and on the left, in which case it is unnecessary to turn the work round its own
axis.
Dated
18th
1000

page_text: COMPLETE SPECIFICATION (AMENDED).
Improvements in the Process of Rolling Tubes, and Apparatus
therefor
I, JOHN IMRAY, of No. 28, Southampton Buildings, Chancery Lane, in the
County of London, Consulting Engineer and Chartered Patent Agent, 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:
In the Specification of my foreign correspondent No. 3371 of 1891 was described
the step by step rolling of tubes on a mandrel by giving the work a step by step
movement between gapped rollers revolving or reciprocating in stationary
bearings.
According to the present invention the rollers themselves are made to continu-
ously revolve and move to and fro longitudinally along the work which has either
an intermittent advancing movement or periodic to and fro movements.
The rolls are mounted in standards that are caused by cranks eccentrics or the
like to rock forwards and backwards.
The rolls,may be made to revolve continuously, while the frame carrying
them reciprocates as shewn in the longitudinal section Fig. 1 and sectional plan
Fig. 2. In this case the crank shaft by means of bevel and spur gear drives a
countershaft o which by means of a bevel wheel free to slide on a feather on the
shaft drives one of the rolls which are geared together.
In
By adopting the arrangement shewn in longitudinal and transverse sections
Figs. 3 and 4 the object operated on is left free during the backward motion.
this case a forward and backward rolling motion of the tools is effected but only
during the forward motion are they brought in contact with the object, while
during the backward motion they are raised away therefrom, so that the object
is then free to be moved forward and turned.
The shaft c carries the eccentric-shaped enlargement e' working in an eccentric
loop piece which constitutes the working tool. The pin on the latter is
prevented from being carried round by the eccentric by means of the rod y which
is pivoted to a fixed pin and the working tools are consequently made to
perform a motion whereby during the rotation of the shafts c c, they first roll upon
the object g and mandrel f, and then, during the backward motion they move away
from the object. The motion of the shafts ce is best effected by spur gearing
causing them to revolve in one direction.
Figs. 5 and 6,shew a modification wherein only a single shaft c is provided with
an eccentric with a loop shaped working tool c².
The support which, in Figs 3 and 4 was constituted by a second eccentric and
tool, is in this case formed by an anvil B.
The form hereof is best made to coincide with the form of the object operated
upon, at the part where it is being worked. The anvil B consequently supports
the object at the part where it is still thick and almost unworked, up to the part
where it is finished. The anvil is therefore made with a semi-trumpet shaped
groove.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that I am aware
of Price's specification No. 6283 of 1894 and I make no claim to any, part of the
invention described therein, but what I claim is:-
1. For rolling tubes upon mandrels, the use of rolls or equivalent rolling tools
revolving continuously in one and the same direction and receiving a to and fro

page_text: motion over the tube operated on, in combination with a mandrel on which the
tube is elongated by a step-by-step action, substantially as described.
2. The construction of the several apparatus for working tubes and other
hollow objects in the manner herein set forth, arranged and operating as herein
described with reference to the drawings.
Dated this 18th day of December 1896.
ABEL & IMRAY,
Agents for the Applicant.