Improvements in or in connection with the Manufacture of Metallic Tubes.
Year: 1895

page_text: Date of Application, 14th Sept., 1895
Complete Specification Left, 2nd Apr., 1896-Accepted, 4th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in or in connection with the Manufacture of
Metallic Tubes.
We WILLIAM PILKINGTON, CHARLES THOMAS BISHOP, ANDERSON
BROWNSWORD and ARTHUR PILKINGTON trading as "The Birmingham Climac
Steel Tube Company" Catherine Street Aston Birmingham Manufacturers do
hereby declare the nature of our said invention to be as follows:-
Our invention has reference to the manufacture of metallic tubes and refers to
the freeing or releasing of the mandril or bar from the tube in a ready and effective
manner.
It is well known that when tubes are made upon a mandril, bar or core, which
extends through their length, the tubes will adhere to the mandril by friction so
much that considerable force has to be used in order to withdraw the mandril or
bar from the tube.
The object of our invention is to effect such withdrawal by a new or improved
method consisting of the construction and combination of mechanical parts to be
now described.
We will describe our invention thus Opposite the opening between the rolls
whence the tube on its mandril or bar emerges after rolling or drawing-we
provide a fixed frame. In this frame are two jaws, one fixed, but adjustible within
certain limits and the other capable of being moved to or from the fixed jaw by
means of a lever and cam or some equivalent mechanical device so that the space
between the jaws may be larger or smaller as may be required.
Extending from this frame in the direction remote from the tube rolls, is a
trough of convenient length, and at the end of this trough farthest from the rolls
we provide a barrel on which a chain can be wound, this barrel is mounted on a
shaft carried by proper bearings, and it may be caused to revolve by any convenient
source of mechanical power acting through suitable gearing. The gearing revolves
continuously and the barrel is caused to revolve with it when desired by means of
a clutch the barrel being free on the shaft.
We provide a gripping piece for the end of the mandril or bar, this gripping
piece we form preferably of a strong disc of metal with a slot in one side (similar
in shape to the loose weights used in ordinary platform weighing machines) the
slot in this disc fits over two grooves which are slotted opposite to each other in
the mandril and near to its leading end and this can be easily engaged and
disengaged.
To this gripping piece we attach the one end of a chain of the proper length
and strength, and the other end of the chain we make fast to the above mentioned.
barrel.
The action of the apparatus is as follows:-
The tube baving been rolled, or drawn with the mandril or bar inside it, the
end of the mandril is pushed through between the jaws in the fixed frame. These
aws are so set by the lever and cam acting on the moveable jaw that the space
between the jaws is just wide enough to allow the mandril or bar to pass between
hem, but not to allow the tube to do so.
17.
Having pushed the end of the mandril through the jaws we secure the "gripper
o it and then by means of a hand lever acting on the clutch we throw the winding

page_text: barrel into gear. The barrel then revolves and winds on the chain, this pulls the
mandril or bar out of the tube and through the jaws in the fixed frame. A weight
then comes into action which acting through a chain led over a pulley and lever
throws the clutch out of gear these freeing the barrel. We then free the gripper
from the mandril and draw back the chain, thus bringing the parts back to their
first position ready for drawing the mandril or bar of another tube.
We e may use this apparatus for the above described purpose in connection with
any method of manufacture of tubes in which such tubes are formed with a mandril
or bar inside them.
Dated 14th Sentember 1895
THOS. KENDRICK,
3 Cherry Lane, Birmingham, Agent.
CODI LEIE DI DUITIVATION.
Improvements in or in connection with the Manufacture of
Metallic Tubes.
We WILLIAM PILKINGTON, CHARLES THOMAS BISHOP, ANDERSON
BROWNSWORD and ARTHUR PILKINGTON trading as "The Birmingham Climax
Steel Tube Company" Catherine Street Aston Manufacturers, do hereby
declare the nature of our said invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
Our invention has reference to the manufacture of metallic tubes, and refers to
the freeing or releasing of the mandril or bar, from the tube in a ready and
effectual manner. When tubes are made upon a mandril, bar, or core, which
extends through their length, they adhere thereto by friction, and great force is
required to withdraw the mandril or bar from the tube.
The object of our invention is to effect such withdrawal by a new or improved
method consisting of the construction and combination of mechanical parts to be
now described by the accompanying specification, and illustrated by the sheet
of drawings.
Figure 1, is a plan of the whole machine.
Figure 2, is a section on the line A. A.
Figure 3, is a side elevation of the machine.
Figure 4, is a plan of jaws at end of trough.
Figure 5, is a front elevation of end of trough.
Figure 6, is a front elevation of gripper.
Figure 7, is a side elevation of gripper.
Figure 8, is a front elevation of a plate with hole.
Figures 4, 5, 6, 7 are to a larger scale than Figures 1, 2, 3.
The same letters of reference denote the same parts in every figure in which
they occur.
a is the mandril, provided with slots a¹ a'. 6 the tube, c. c' ordinary tube rolls,
d, d¹ jaws for preventing the tube passing along a mandril, d being set by screw f,
and d¹ by the eccentric cam e; e, is the eccentric cam for adjusting jaw d¹, e', the
spindle actuating the cam e. es the handle or lever actuating the spindle e¹; fis
a set screw for adjusting the jaw d. d is a plate with hole d³ which may be used
instead of the jaws d d' for effecting the same purpose. g is a gripper with slot g¹
for gripping mandril a, h, chain for drawing mandril a, by means of gripper g,
, the chain barrel, j, the trough, k, is the main shaft carrying the chain barrel i,
k', k', bearings for shalt k, l, half of clutch secured to worm wheel m, l', half of
clutch, sliding on feather on main shaft k, the hand lever for actuating the
fork, the fork for throwing the clutch in and out of gear the lever for

page_text: throwing the clutch out of gear, the chain to weight, 16, the pulley
to throw clutch 11, out of gear, m, the worm wheel revolving loose on shaft k,
the weight
n, the worm actuating worm wheel m. o is the shaft to which the worm n is
secured, o¹ and o' are fast and loose pulleys on shaft o, o³, is the fly wheel, o o are
5 bearings for worm shaft o, p is the framing of the machine, the gearing revolving
continually.
We will now describe the mode of operating the parts for effecting the release
of the mandril, or bar, from the tube according to our invention.
After the tube b, has been rolled or drawn with the mandril or bar a inside it by
the rolls c, the extending end of a, is passed between the jaws d d which are so-
set by the lever or handle e and the cam e acting on the moveable jaw d' that a.
space is for:ned sufficient to allow the mandril or bar a, to pass through, but not
to allow the tube b to pass.
The end of the mandril or bar a, being now through
the space in the jaws d, d' a required distance the slot g¹ of the gripper 9 is
engaged with the slots a', al of the mandril a and by means of the hand lever
and the fork the half clutch slides on its shaft and engages with the half
clutch, imparting motion to the winding or chain barrel i, the one end of the
chain h, being secured thereto, and the other end to the gripper g, the chain-h is
thus wound upon the now revolving barrel i, this effects the pulling or drawing
the mandril or bar a out of the tube b. During this operation the hand lever lis
held back, but upon releasing this lever the weight and chain working over
the pulley, to the lever throws the half clutch out of gear thus freeing the
chain barrel i, the gripper g is now removed from the mandril or bar a lying in
the trough j. The chain h and its gripper 9 can now be employed for drawing the
mandril or bar a from another tube and so on continuously.
We would observe in conclusion that we do not limit ourselves to these drawings.
being merely illustrative of our invention but contemplate necessary or desirable
changes either in the construction, or application without departing essentially from.
the principle of our said invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed we declare that what
we claim is :-
"In improvements in or in counection with the manufacture of metallic tubes."
1. The combination, the jaws d, d¹, screw, cam e, spindle e¹ and handle e, or
their equivalent d' with hole d³ substantially as and for the purpose herein before
lescribed and illustrated by the drawings.
2. The combination, the gripper g with slot gl the slots a' a' of the mandril a,.
he chain h with chain barrel i substantially as and for the purpose herein before
escribed and illustrated by the drawings.
3. The combination, the half clutches 1. the hand lever with fork l
ubstantially as and for the purpose herein before described and illustrated by the
rawings.
4. The combination, the lever with chain pulley weight substantially as.
nd for the purpose herein before described and illustrated by the drawings.
5. The combination, the worm wheel m with worm
bstantially as and for the purpose herein before described and illustrated by the
n pulley wheels o' o³.
rawings.
6. The general construction and combination of parts substantially as herein.
efore described in the foregoing specification and illustrated on the accompanying:
eet of drawings.
Dated 2nd April 1896.
THOS. KENDRICK,
3 Cherry Street, Birminghamn, Agent.