Year: 1895

page_text: Date of Application, 24th Sept., 1895
Complete Specification Left, 15th June, 1896-Accepted, 18th July,
1896
I, AUGUST BUCKEL of Soest, in the German Empire, Manufacturer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to an apparatus for bending pipes and especially thin,
cylindrical pipes.
Until now such pipes have been bent after previous filling with colophony, lead,
zinc &c., which filling had to be removed by melting after bending. Pipes so
bent have an unsightly appearance and require to be cleaned or redressed
occasioning extra work, expense and loss of material.
The present invention is intended to remove these defects, so that the bending
will be easily and quickly done, in perfect form, without creases and without
needing subsequent labour.
The bending is done by mechanical insertion of a flexible piece in the pipe-part
requiring bending, which flexible piece consists of single plates or rings of suitable
cross-section placed on a flexible rod after which the pipe is bent together with
the inserted piece against a suitable abutment and the inserted piece is afterwards
extracted mechanically.
The apparatus required for this work has the following form
On a ground plate a rod can be moved to and fro in a groove by means of a
lever, the front-end of which rod is fitted with a flexible piece, such as a wire-rope,
chain, metal-band or such-like. On this piece are strung small plates or rings,
lying loosely together, which must exactly correspond to the cross-section of the
pipe and they are held in front by means of a block fitted with a roller in such a
manner, that this piece with plates may be easily bent. Above these plates is
fitted one (or more) spring-tongues which prevent the plates from penetrating into
the pipe during the bending and admit also of an easy removal of the inserted
piece. The rod moves in a movable socket, the position of which can be altered
by means of the lever and the socket moves again in a fixed socket and in the
groove of a fixed directing part. Below the end of the last named part is fitted
a roller around the centre of which a lever may be turned which has above the
end of the groove of the directing part a bending roller and also a secondary
bending roller carried by an arm.
Dated this 24th day of September 1895.
HERBERT HADDAN & Co.,
Agents to Applicant.
Improved Apparatus for Use in Bending Pipes.
1, AUGUST BUCKEL, Manufacturer, of Soest, in the Empire of Germany, 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
0 statement :-
This invention relates to an apparatus for bending pipes and especially thin
cylindrical pipes, for instance, such as are used in storm lanterns without, as

page_text: hitherto usual, previous filling with a mass-such as colophony, lead or the like and
it consists especially in an apparatus for performing the bending and a flexible
piece which can be pushed into the tube to he bent and then again taken out.
The apparatus is shown in the annexed drawing in which
Fig. 1 is a diagrammatic plan or elevation of the whole.
Figs. 2, 3 and 4 sections illustrating successive stages in the process of
introducing the core and bending the tube, and
Fig. 5 an.enlarged-sectional view showing more particularly the construction of
the core.
Upon a bed plate a a rod b can be moved to and fro in guides by means of the
lever c and link d; on the front end of this rod is fitted a flexible part e such as a
wire rope, chain, metal band or the like. On this piece e are strung small plates
or rings which, lying loosely together, are held in front by means of a block g
provided with arroller in such a manner that this piece e carrying the plates may
Le easily bent. The plates or rings which are intended to fill out the tube to be
bent must correspond in their form to the cross-section of the interior of the pipe.
Above these plates is fitted one or more spring-tongues which prevent the plates,
moving apart at their edges, from penetrating the pipe-wall during the bending,
'the tongue covering the spaces between the plates. The rod a with the inserted
piece e, f, moves in a movable socket the position of which can be altered by
means of lever and socket 1, moves again in a fixed socket and in the groove
of a fixed directing part h. Below the end of the last named part is fitted a
roller m the centre of which is also the fulcrum point for a lever n which carries
-above the end of the groove of the directing part ha bending roller o and also a
secondary bending roller p carried by an arm.
The operation is as follows:-The pipe is introduced between the rollers m, o,
into the groove of the part until it touches the socket 1 (Fig. 2). Then the
lever c is moved into the position whereby the rod b with the part e, f, is pushed
into the tuber. (Fig. 3). Then the lever n is moved towards the position n',
whereby the rollers o, p, bend the tube with its inserted piece round the roller m
(Fig. 4).
After the lever n has been moved back into its previous position and the inserted
part e, f, by moving back the lever c, has been drawn out of the bent tube, the
latter is free and the lever k is now moved into the position k¹, the socket lis
moved thus forwards and pushes the tube out of the groove of the part h
whereupon it can be easily taken out and replaced by another after the lever k has
been moved back again.
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 what
claim is :-
An improved apparatus for use in bending pipes and especially thin cylindrica
pipes, having a core piece which is to be pushed into the tube to be bent and whic
consists of plates, rings for the like strung loosely upon a flexible core e an
covered in the front by a spring-tongue this core-piece being fixed on a rod
movable by means of a levere and link d and guided by a movable socket / an
the groove of a fixed tube guide and being adapted to be turned together wit
the pipe by means of a lever provided with rollers moving round a stationar
roller.
Dated this 15th day of June 1896.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to the Applicant..