Improvements in Machinery for the Manufacture of Sanitary Pipes.
Year: 1893

page_text: Date of Application, 10th Nov., 1893
Complete Specification Left, 7th Aug., 1894-Accepted, '8th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in Machinery for the Manufacture of Sanitary Pipes.
JOHN SAMUEL PULLAN and WILLIAM HUTCHINSON MANN, The Cambrian
Works, Elland Road, Leeds Engineers and Brick Machine Makers do hereby.
declare the nature of this invention to be as follows :—
The object of this invention is to apply to direct acting steam power sanitary
tube making machines an arrangement whereby steam of a reduced pressure is
used for the up stroke of the piston, as it is well known that comparatively little
force is required for that purpose. The machines hitherto constructed use the
same pressure of steam for the up stroke as for the down stroke & consequently
are very wasteful in the consumption of steam. Now the object of this invention
is to save waste & to do this we employ firstly a reducing valve for reducing the
steam to about of the pressure used for making the pipes; secondly a special
admission valve having suitable steam & exhaust ports & an inner chamber & ports
for admitting & exhausting the reduced steam distinct & separate from the high
pressure steam; or we may use instead two separate steam chests with a valve in
each, one at the top of the cylinder for the high pressure steam & one at the
bottom of the cylinder for the reducing pressure steam or the same object may be
accomplished. in any other convenient manner.
Dated this 9th day of November 1893.
:
J. S. FULLAN.
"WM. H. MANN.
COMPLETE SPECIFICATION.
Improvements in Machinery for the Manufacture of Sanitary Pipės.
We, JOHN SAMUEL PULLAN, and WILLIAM HUTCHINSON MANN, The
Cambrian Works, Elland Road, Leeds, Engineers and Brick. Machine Makers,
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 object of this invention is to apply to direct acting steam power sanitary
tube making machines, -an arrangement whereby steam of a reduced pressure is
used for the return or up stroke of the piston, as it is well known that com-
The machines hitherto
paratively little force is required for that purpose.
constructed use the same pressure of steam for the return or up stroke as for the
down stroke and consequently are very wasteful in the consumption of steam. The
object of this invention is to save the aforesaid waste.
DESCRIPTION OF DRAWINGS.
Fig. 1, is a section of part of cylinder and piston with our special admission and
exhaust valve applied.
Fig. 2, is a plan of slide special admission and exhaust valve.
Fig. 3, shows section of cylinder with two separate steam chests, one for high
pressure and the other for low.
.
(Figs. 1 and 2.) A is part of a steam cylinder in section, B is the piston, C is
the steam chest, high pressure steam being admitted at C, D is the slide valve

page_text: having high pressure admission ports E, E', (a lesser or greater number of these
ports may be used) leading to the main port H, F is the low pressure admission
port, G is the exhaust. Any ordinary reducing valve is placed at the low pressure
admission end to reduce the steam to about + of the ordinary pressure used for
pipe making machines, or to the pressure required to lift the piston with its
attachment to the top or return of its stroke.
Or in place of taking the steam through a reducing valve from the same source
as the high pressure steam is taken, the reduced steam may be taken direct
(without using a reducing valve) from a separate boiler or other source working
at a lower pressure.
The low pressure admission port F, leads to the inner chamber in the slide
valve D, H is the main port of the low pressure end of cylinder, J is the
exhaust chamber of the valve.
High pressure steam is admitted to the steam chest at C¹ and low pressure steam
at F, the slide valve moves forwards and admits the high pressure steam through
the admission chambers E and E¹, and drives the piston forwards, the low pressure
exhaust is now open, the slide then moves back, opens the high pressure exhaust,
and admits low pressure steam which returns the piston.
Or in lieu of above two separate chests L, L, (see Fig. 3) with a valve in each
are employed, one being for high pressure steam and the other for low pressure
steam.
The steam is admitted to the low pressure steam chest by means of any ordinary
reducing valve, or separate boiler, as before described.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. In sanitary pipe making machines the application of low or reduced pressure
for the return or up stroke of the piston for the purposes described.
2. The combination of a reducing valve and special admission valve D with
steam admission ports E, E', exhaust chamber J, and inner chamber K, sub-
stantially as shown and described.
:
3. Constructing the cylinder with two separate steam chests L L and valves,
one for high pressure, and the other for low pressure, substantially as shown and
described.
Dated this 3rd day of A nonst 1844
Dated Ln18 3rd day of A nonst. 1891
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent to the Applicants.