Improved Machinery for Shrinking Hoops Round Pipes and the like.
Year: 1898

page_text: Date of Application, 26th July, 1898
I, LEON LUCIEN MORANE, of 23, Rue Jenner, Paris, in the Republic of France,
Constructor, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in machines for tyre setting, hooping or
the like, such as West's.
In West's machines for the application of tyres to wheels the construction com-
prises a frame work receiving a rim supporting movable cylinders arranged upon
fixed pistons provided with sectors and actuated in their return movement by
springs and forming together a circular table the sections thereof working towards
the centre upon the circumference of the tyres movable wedges or jaws being
used.
This disposition being proper for wheels is not however applicable to water or
other pipes of raw iron and of considerable length and provided at distances with
circular flanges round which hoops are to be applied.
For applying these hoops it is necessary that the table and the movable sections
should be removed and that the backward movement of the pistons be modified and
the form of the wedges and jaws must be different.
In this invention the machine is constructed to hoop the pipes in a cold state.
On a circular piece carried by a circular bearing foot a suitable number of
cylinders are arranged wherein pistons move which are connected together by
movable sectors and guided by the guides.
The pistons are moved forward in a radial manner by means of water pressure
introduced through tubes, and drawn backwards by springs.
Detachable wedges are arranged fitting to the pistons in order that pipes of
different diameters may be hooped.
The working of the machine is the same as that for wheels with the only differ-
ence that the pipe instead of lying on a table changes its positions in order to
present to the action of the pistons each of its flanges to be hooped.
Dated this 26th day of July 1898.
HERBERT HADDAN & Co.,
Agents to Applicant.
Improved Machinery for Shrinking Hoops Round Pipes and the like.
I, LEON LUCIEN MORANE, of 23, Rue Jenner, Paris, in the Republic of France,
Constructor, do hereby declare the nature of this invention and in what manner
[Price 8d.]

page_text: the same is to be performed to be particularly described and ascertained in and
by the following statement:-
Hitherto the hoops required to reinforce pipes, the parts of which they must
especially maintain in case of breakage are put on when hot in a similar manner
to that habitually done in tiring wheels in carriage factories. This method does
not give sufficient molecular adherence so that the hoops round the circular flanges
of these pipes often slide and consequently fulfil their purpose very imperfectly.
In order to obtain a better result I hoop the metal tubes cold by means of
machinery described hereinafter, consisting in compressing the hoop in the cold
state enough to embrace intimately the pipe, by means of hydraulic pistons work-
ing radially and whose action is rendered constantly equal for all by sectors which
join each piston with that following and preceding it.
The essential parts of this machine are shown in Figs. 1 and 2 of the annexed
drawings, Fig. I being a sectional elevation of the machine and a pipe thereon.
Fig. 2 a plan of the machine. Figs. 3 and 4 are modifications hereinafter
referred to.
Un a circle A carried by a circular bearing foot B, cylinders C are fastened
wherein move the pistons D which are connected together by movable sectors E
and guided by the guides F.
The pistons D are moved forward in a radial manner by means of water pressure
injected through pipes H; the pistons are brought back by recoil springs R.
Detachable wedges or blocks K are fitted to the pistons in order that pipes of
different diameters may be hooped. The pipe to be hooped can move vertically
to the centre of the machine in order to present each of its flanges to the action
of the pistons.
This new mode of hooping allows also of adopting hollow forms of flanges as
shown in Figs. 3 and 4 which hold the hoop securely, these forms would be im-
practicable for hot hooping.
Having now particularly described and ascertained the nature of this said
invention and in what manner the same is to be performed I declare that what
I claim is:
A new or improved machine for hooping in a cold state metal pipes of all kinds
comprising the combination of pistons moving radially, maintained and guided by
sectors with injecting apparatus, recoil springs and removable wedges or blocks
the whole arranged on a circular frame which allows the free passage in its centre
of the pipes to be hooped.
Pattu
this 20th day of April 1899.
HERBERT HADDAN & Co.,
Agents to Applicant, 11, Buckingham Street, Strand, W.C.,