Year: 1887

page_text: Date of Application, 5th Apr.. 1887:
Complete Left, 6th Sept., 1887 ·
Complete Accepted, 11th Oct., 1887
I, REGINALD HADDAN of the firm of Herbert & Co., Patent Agents, of 67 Strand,
London, in the County of Middlesex, Civil Engineer, lo hereby declare the nature of
this invention, a communication to me from abroad by Messrs. Oldenhoff and
Uhlig, of 15 Tempelhofer Ufer, Berlin, in the Empire of Germany, to be as follows:
This invention consists in certain improvements in the manufacture of pipes and
has for its purpose the production of pipes curved where necessary, and in the required
direction.
Over a suitable feed reservoir containing the liquid or other material of which the
pipe is to be composed, is arranged a chamber of preferably truncated conical form,
the said chamber being open above and in communication with the reservoir below.
Centrally within the said chamber is fixed a cylindrical or other conveniently shaped
block, the said block and chamber being so shaped and relatively placed at their upper
ends, that a space is left between the wall of each, said space being everywhere of an
equal breadth, and in shape equivalent to the cross section of the pipe to be formed.
Below the said opening is arranged to slide in the chamber a horizontal plate having
a perforation of suitable size and shape through which the central block passes. This
perforation may be exactly equal in shape and size to the upper opening of the
chamber.
Suitable means are arranged for adjusting and holding the said plate with regard
to the central block.
The liquid or other feed material being pressed upward into the chamber passes
between the plate and the central bore, upward and out of the mouth of the chamber
where it forms the pipe in the usual manner. By however suitably adjusting the

page_text: plate, the edges of the perforation therein are correspondingly set with regard to the
central block so that less material passes upon the one side and correspondingly more
on the other side of the latter.
Since however the upper opening of the chamber is always fixed, less material will
be formed into pipe on the one side and more on the other, so that the latter will be
more quickly formed than the former and a curved pipe will be the result, the curva-
ture depending therefore both in direction and amount on the position of the adjustable
plate with regard to the central block. The plate may be suitably operated from
without by eccentric or cam devices operated by a hand lever, or by other suitable
mechanical means.
Dated this 5th dow of Anvil 1997

page_text: 1, REGINALD HADDAN of the firm of Herbert & Co., Patent Agents, of 67 Strand,
London, in the County of Middlesex, Civil Engineer, do hereby declare the nature of
this invention, a communication to me from abroad by Oldenhoff and Uhlig of
15 Tempelhofer Ufer, Berlin, in the Empire of Germany, and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
This invention consists in improvements in the manufacture of pipos, and has for
its purpose the production of pipes curved where necessary and in the required
direction.
Referring to the accompanying drawings:
Fig. 1 is a vertical section of the apparatus.
Fig. 2 a plan view thereof.
H is the reservoir containing the material of which the pipe is to be formed. Over
the mouth of the reservoir is fixed a chamber B preferably of truncated conical or
pyramidal form open below to the mouth of the reservoir and above to form a
mouth of a diameter equivalent to that of the pipe to be formed. Centrally in said
chamber B is rigidly fixed by suitable means the core A of cylindrical, prismatic or
other convenient shape. This core A terminates above lovel with the mouth of tho
chamber B and in such a shape that between the edge of the inner wall of the chamber
and the outer wall of the core A a space everywhere of equal breadth is left equivalent
to the thickness of the wall of the pipe to be formed. At a short distance below the
mouth of the tube is arranged a plate C sliding in slots cut in the walls of the
chamber B. In said plate is a perforation exactly equal in size and shape to
the mouth of the chamber, the core A passes through said perforation.
The liquid or other feed material being pressed upward from H into the chamber B
passes between the plate C and the central core A, upward and out of the mouth
of the chamber B where it forms the pipe in the usual manner. By however suitably
adjusting the plate C, the edges of the perforation therein are correspondingly set
with regard to the central core A so that less material passes up on the one side and
correspondingly more on the other side of the latter. Since however the upper
opening of the chamber B is always fixed, less material will be formed into pipe on
the one side and more on the other, so that the latter will be more quickly formed
than the former and a curved pipe will be the result, the curvature depending
therefore both in direction and amount on the position of the adjustable plate with
regard to the central core A.
The mechanism for operating the plate C may vary, but the following construction
is convenient since it is strong and rigid and minute adjustment of the plate C may
be attained thereby.

page_text: Two pins fixed or formed on each side of the plate C are connected by links or
rods D D with pins e e excentrically placed on a shaft adapted to be turned by a
lever E, said shaft being journalled in bearings F F firmly attached to some rigid
part of the apparatus. On moving the lever E, the pins e cause the links D to move
the plate C towards or from the lever E.
The chamber B is so attached to the reservoir H as to be easily removable, for this
purpose it may be provided with a flange at its foot secured upon the rim of the
reservoir H by the plate G placed thereon and connected to said flange of the reservoir
by bolts and nuts I as shown in Fig. 1.
Having now particularly described and ascertained the nature of said invention
and in what manner the same is to be performed, I declare that what I claim is
For the manufacture of curved pipes:
1. The combination with pressure feed apparatus of the chamber B having outlet a
the core A in said chamber terminating level with and centrally in said outlet and
the plate C having perforations equal to the outlet said plate passing around the
core A and adapted to be adjusted in a plane vertical to the axis of said core.
2. The combination with the plate C of the lever E and eccentrics e and rods D
substantially as set forth.