Improvements in Machines for Making Curved Metal Pipes.
Year: 1889

page_text: Date of Application, 23rd July, 1889
Complete Specification Left, 31st Dec., 1889-Accepted, 22nd Feb., 1890
PROVISIONAL SPECIFICATION.
[Communicated from abroad by OSCAR KNAPP, of 133, South Ninth Street, Brooklyn,
State of New York, United States of America, Manufacturer.]
Improvements in Machines for Making Curved Metal Pipes.
1, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
My improvement consists in forming sinuous lead or analogous pipe by means of a
head block provided with a cavity for receiving molten metal a plunger acting in the
cavity and a second plunger operating alternately to withdraw from and inject metal
into the cavity and it further consists in a core piece arranged in an outlet above the
aperture through which the pipe issues.
By my improvement I am enabled to form sinuous piping for plumbers waste traps
very rapidly and almost continuously, while obviating waste of material.
I use a piston which is adapted to be moved to and fro within a cylinder. This
piston has secured to its outer end by any desirable means, a plunger, the other end
of which extends into a cavity formed in a head block.
The head block and the
cylinder before mentioned are connected by bolts or posts.
The cavity in the head block extends entirely through the head block and arranged
above it, secured to the head block, is a cap piece provided with a aperture.com-
municating with the cavity in the head block.
This aperture is slightly greater in diameter at its lower end than is the cavity
through the head block, and from its lower end the aperture tapers inwardly to near
its upper end where it is curved or flared outwardly.
Within the aperture of the cap piece is arranged a spreader. This spreader is
provided at one end with a knoblike or rounded head, below which the shanklike
portion tapers gradually to its lower end.
Extending radially from the shank portion are wings of gradually increasing width
from their upper to their lower extremities. These wings in fact conformn
approximately to the conical form of the aperture, and when within the aperture, the
wings rest upon a flangelike portion of the head block, which flangelike portion is due
to the greater diameter of the aperture at its lower end than the diameter of the cavity
through the head block. Lead or other suitable metal having been poured into the
cavity of the head block through the aperture in the cap piece, is forced outward
through the aperture by the action of the plunger which is operated by the piston
receiving its motion by hydraulic or other suitable pressure.
The lead, upon being forced outwardly, is caused to assume a sinuous form. The
pipe of lead thus formed may be cut into suitable lengths to form plumbers traps for
waste water. In order to cause the pipe of metal as it issues from the aperture, to
assume automatically the curve to which I have referred, I reduce the pressure on the
body of metal upon one side of the pipe as it issues from the aperture, or 1.thicken it
upon one side as occasion may require.
In order to do this I employ a small plunger extending to a piston. operated in a
cylinder which is secured to the head block by means of screws or otherwise,
and extends downwardly at an angle thereto. The piston may be operated by
hydraulic pressure.
The small plunger reciprocates in a cavity in the head block, which has its inner
opening at the upper extremity of the cavity first mentioned.
It is obvious that by an inward movement of the small plunger molten metal will
be forced to increase the pressure at one side of the issuing pipe, or by an opposite

page_text: movement of the small plunger a portion of metal will be drawn away from the pipe
thus reducing the pressure at that side.
It is to be understood that the main cavity is first filled with molten metal.
T: 021
0
1000
HASELTINE LAKE & Co
45, Southampton Buildings, London, Agents for the Applicant.
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Machines for Making Curved Metal Pipes.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Sonthampton Buildings in the County of Middlesex, 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 :-
My improvement consists in forming sinuous lead or analogous pipe by means of a
head block provided with a cavity for receiving molten metal, a plunger acting in the
cavity and a second plunger operating alternately to withdraw from and inject metal
into the cavity, and it further consists in a core piece arranged in an outlet above the
aperture, through which the pipo issues.
By my improvement I am enabled to form sinuous piping for plumbers' waste traps
very rapidly and almost continuously, while obviating waste of material.
I use a piston which is adapted to be moved to and fro within a cylinder. This
piston has secured to its outer end by any desirable means, a plunger, the other end of
which extends into a cavity formed in a head block. The head block and the cylinder
before mentioned are connected by bolts or posts.
The cavity in the head block extends entirely through the head block and arranged
above it, socured to the head block, is a cap piece provided with an aperture commu-
nicating with the cavity in the head block.
This aperture is slightly greater in diameter at its lower end than is the cavity
through the head block, and from its lower end the aperture tapers inwardly to near
its upper end where it is curved or flared outwardly.
Within the aperture of the cap piece is arranged a spreader. This spreader is pro-
vided at one end with a knoblike or rounded head, below which the shank like
portion tapers gradually to its lower end.
Extending radially from the shank portion are wings of gradually increasing
width from their upper to their lower extremities. These wings in fact conform
approximately to the conical form of the aperture and when within the aperture the
wings rest upon a flangelike portion of the head block, which flangelike portion is due
to the greater diameter of the aperture at the lower end than the diameter of the
cavity through the head block. Lead or other suitable metal having been poured
into the cavity of the head block through the aperture in the cap piece, is forced out-
ward through the aperture by the action of the plunger which is operated by the
piston receiving its motion by hydraulic or other suitable pressure.
The lead, by being forced outwardly, is caused to assume a sinuous form. The pipe
of lead thus formed may be cut into suitable lengths to form plumbers' traps for
waste water. In order to cause the pipe of metal, as it issues from the aperture, to
assume automatically the curve to which I have referred, I reduce the pressure on the
body of metal upon one side of the pipe as it issues from the aperture, or
upon one side as occasion may require.
thicken it
In order to do this, I employ a small plunger extending to a piston operated in a
cylinder which is secured to the head block by means of screws, or otherwise, and
extends downwardly at an angle thereto. The piston may be operated by hydraulic
pressure.
The small plunger reciprocates in a cavity in the head block which has its inner
opening at the upper extremity of the cavity first mentioned.
It is obvious that by an inward movement of the small plunger molten metal will
be forced to increase the pressure at one side of the issuing pipe, or by an opposite

page_text: movement of the small plunger or piston of metal will be drawn away from the pipe
thus reducing the pressure at that side.
It is to be understood that the main cavity is first filled with molten metal.
In the accompanying drawings, Figure Ĭ is a longitudinal section of a machine
embodying my improvement. Figure 2 is a transverse section thereof taken on the
plane of the dotted lines Figure 1. Figure 3 is a side view in detail of a core
employed in the machine. Figure 4 is a bottom view of the same. Figure 2 is
drawn to a smaller scale than Figure 1 and Figures 3 and 4 are drawn to a larger
scale that Figure 1. Similar letters of reference designate corresponding parts in all
the figures.
A designates a piston. This piston is adapted to be moved to and fro within a
cylinder A. Secured to the outward end of the piston A as here shown by means of
screws a is a plunger B. The other end of the plunger B extends into a cavity B¹,
formed in a head-block (. The head-block C and the cylinder A' are secured together
as here shown by means of bolts b. Above the head block in this example of
my improvement is a cap-piece C¹. The cap-piece constitutes in effect a portion
of the head-block. This cap-piece is provided centrally with an aperture c.
This
aperture is in communication with the cavity B¹, and is shown of slightly greater
diameter at its lower end than is the cavity B. The aperture c tapers upwardly
from the cavity B¹ and at its outer end is shown as curved or flaring. The cap-
piece is secured to the head block by means of screws d. D designates a
core. This core is provided at one end with a knob-like or rounded head e.
Below the knoblike or rounded head e is a shank e¹ which shank, in the example
of my improvement shown, tapers downwardly to the lower end of the core.
Extending outwardly from the shank e¹ are wings e². These wings are of gradually
increasing width from their upper to their lower extremities.
When the core is
within the aperture c in the cap-piece C¹ the wings e of the core are in contact with
the wall of the aperture and rest upon a flange-like portion of the head block C
which flange-like portion is due to the greater diameter of the aperture c at its
lower end than the diameter of the cavity B. The wings e act as steadiments to
the core D. It will be observed that the lower end of the core, D, is approxi-
mately in a horizontal line with a curving device, hereinafter described, so that the
core is above the curving device.
"
'13 "
Lead or other suitable metal having been poured into the cavity B' through the
aperture c in the cap-piece C' is forced outwardly through the outer end of the
cavity c by the action of the plunger B, the plunger B being operated by the piston A
which latter in the present example of my improvement shown is moved outwardly by
hydraulic pressure applied through the apertures g in the cylinder A' and against the
head of the piston A.
In the class of inventions to which my improvement relates, the lead, upon being
forced outwardly is caused to assume a sinuous form upon cooling. The pipe of lead
thus formed may be cut into suitable lengths as desired to form plumbers traps for
waste water. In order to cause the pipe of metal as it issues from the aperture c to
assume automatically the curve to which I have referred, in performing this operation,
I employ a plunger E, which plunger is secured to a piston E operating in the
cylinder E. The cylinder E' is secured to the head block C by means of bolts h and
extends to one side of the bead-block, and in the present example of my improvement,
downwardly and at an angle thereto. The plunger E works in a cavity F formed in
the head-block C, and opening at its inner end into the cavity B₁ at the extremity of
the latter. The piston E' is operated by hydraulic pressure acting against the head
of the piston and applied through an aperture in the cylinder E' in manner similar
to that of the piston A.
I have shown the plunger E withdrawn approximately to its farthest position.
Assuming that the machine is to be put into operation, the plunger E is forced into the
cavity F until it substantially closes the same. The cavity B' having been filled with
molten metal the plunger B is operated to cause the metal to flow through the open
outer end of the cavity B. When it is desired to cause the metal which forms the

page_text: pipe to curve to one side the plunger E is withdrawn, thereby causing a flow of metal
into the cavity F. The cooled pipe then formed in passing out at the other end of the
cavity B will curve to one side because a portion of the metal is withdrawn from one
side of the pipe, and there being consequently less metal upon the side of the pipe
upon which the portion is withdrawn than upon the other. It is next desirable to
cause the pipe to curve in the opposite direction in order to form sinuosities in the
pipe. The plunger E is then forced inward thereby causing an excess of metal to
be imparted to the adjacent side of the pipe about to issue from the cavity B, whereby
the pipe is caused to curve in the other direction.
It is to be understood that the plunger B moves continuously upward until all the
metal is discharged from the cavity B, and that the plunger E makes a number of
excursions to.and fro during each upward movement of the plunger B.
By my improvement I have been able to form sinuous piping for the manufacture
of plumbers waste traps very rapidly and almost continuously, while at the same time
there is no leakage nor waste of material, nor is it necessary in my improvement that
there should be different streams of metal delivered at different velocities whereby the
sides of the pipe are thickened or thinned as desired.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign Correspondent I declare that what I claim is:
1. In a machine for forming curved lead pipes, the combination with a head-block
provided with a cavity for receiving molten metal, and an aperture beyond said cavity
through which the metal may be ejected, of.a plunger acting in said cavity, a core for
forming the interior of the pipe and a second plunger operating alternately to with-
draw metal from the said cavity and to inject it into the same near said discharge
aperture, substantially as specified.
2. In a machine for forming curved lead pipe, the combination with the cap-piece,
the head-block and the curving device, of the core located wholly above said curving
device, and consisting of the central piece, laterally extending wings of gradually
increasing width from top to bottom, said wings.commencing at a point below the
top of said core, the core above said point being of the form of the interior of the
pipe to be produced, substantially as specified.
3. In a machine, for forming curved lead pipe, the combination with a head block
provided with a cavity for receiving molten metal and an aperture beyond said cavity
through which the metal may be ejected, of a core, a plunger acting in said cavity, a
piston for operating said plunger, a second cavity in the head block, a plunger acting
in said second cavity, and a piston operating the second named plunger to alternately
withdraw metal from the said cavity and inject it into the same near the discharge
aperture, substantially as specified.
4. In a machine for forming curved lead pipe, the combination with a recessed.cap-
piece, of a block having a cavity for containing the molten metal in communication
with the recess of the cap-piece, a plunger within said cavity, a second cavity in said
block opening into said first cavity at a point near where it communicates with the
recess of the cap-piece and a plunger operating in said second cavity, substantially as
'specified.
5. In a machine.for forming curved lead pipe, the combination of a cylinder and
head-block secured thereto, said head-block being provided with two plungers, cavities
and a core wholly above the cavities, a plunger operated by the piston of the cylinder
supporting the head block within one cavity of the head-block, and a second cylinder
supported by said head-block and operating the plunger within the other cavity
of said head-block at an angle to the first named plunger, substantially as specified.
Datad this 21st day of Decombe 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant,