Improved Device for Bending Metal Pipes in the Cold State.
Year: 1898

page_text: [Communicated from abroad by G. BRANDT, of Kochstrasse 4, Berlin, S.W., in
the German Empire, Patent Agent.]
Improved Device for Bending Metal Pipes in the Cold State.
I, CARL BOLLÉ, of 57, Barton Arcade, Manchester, in the County of Lancaster,
Consulting Engineer, 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.
The subject of this invention is a device which will permit metal pipes to be
bent in a cold state without cracking or splitting them and preserve the circular
section of the pipe during the process of bending.
In the accompanying drawings, which illustrate my invention, Fig. 1 repre-
sents a top view of several shaping templets, secured on top of each other so as
to form one solid piece.
Fig. 2 shows a top view of the bottom plate serving as support for the shaping
templets in Fig. 1;
Fig.
is a side view showing the shaping templets of Fig. 1 mounted on
bottom plate Fig. 2;
Fig. 4 shows a single shaping templet in top view;
Fig. 5 shows a bottom plate suitable for this shaping templet;
Fig. 6 shows in side view both parts Fig. 4 and Fig. 5 united.
The whole device is intended to be brought as a portable tool to any install-
ation where such metal pipes are employed to enable the plumber to bend the
metal pipes to suit the local conditions of the place of installation and to fit
them into any shape that the installation may require.
The bottom plate A has a semicircular shape to adapt it to the reception of
the shaping templets; it is provided with lugs a, a so that it can be fastened
with screw bolts to a workbench or to the wall. The shaping templets are held
in place on the bottom plate by means of pins placed into the holes b. The
shaping templets may be single, suitable for bending only one curve on one size
of pipe, as shewn in Figures 4 and 6, or there may be number of shaping temp-
lets for different radius and different diameter cast in one piece, as shewn in
Figs. 1 and 3.
Each shaping templet is provided on its periphery with a groove of semi-
circular section so as to nicely fit the size of pipe to be hent.
By means of an eccentric clamp d, pivotted on a holt e, as shewn by Figs. 5
and or as shewn in Fig. 3 by a back rest f, one end of the pipe to be bent is
held tightly in position, while the pipe is bent round the shaping templet by
hand, being embraced for one half its section by the semicircular groove of the
shaping templet, whereby the circular section of the pipe is maintained.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to he performed, I declare that what
I claim is: -
1. An improved device for bending metal pipes in the cold state, consisting

page_text: of a bottom plate A with lugs a for fastening the same on a workbench, with
one or more shaping templets B, having semicircular grooves on their periphery
and provided with an excentric clamp d or a back rest f to hold the pipe to
be bent during the process of bending, substantially as herein before described
and illustrated by the drawings.
2. An improved device for bending metal pipes in the cold state substantially
as, specified in Claim One, having shaping templets with semicircular grooves on
their periphery for the purpose of receiving the metal pipe to be bent and by
this means preserving the circular shape of the pipe and avoiding any flattening
of the pipe during bending, without the aid of a bending core, substantially as
herein before described and illustrated by the drawings.
Dated the 13th day of December 1898