Improvements in Means or Apparatus for Regulating and Controlling the Admission of Steam or other Fluid to Capstan and other Engines.
Year: 1895

page_text: Date of Application, 31st May, 1895
Complete Specification Left, 18th Feb., 1896-Accepted, 28th Mar.,..1896
PROVISIONAL SPECIFICATION.
Improvements in Means or Apparatus for Regulating and
Controlling the Admission of Steam or other Fluid to
Capstan and other Engines.
We DAVIS & COMPANY LIMITED of 12 Fenchurch Street, in the City of
London, Engineers, and WILLIAM ROBERT GARDEN HAY of Garford Street
Engineering Works, Garford Street, Poplar, in the County of Middlesex, Director
and Manager of the said company do hereby declare the nature of this invention
to be as follows:
:
This invention relates to valve apparatus for regulating and controlling the
admission of steam, or it may be other fluid, to capstan engines and engines for
other purposes, so as to render the revolutions of the capstan engine, or engine for
other purpose regular and uniform, by the operation of the parts themselves
without interference of an attendant.
The apparatus consists of a hollow central piston having an open end and two, or
other number of ports, one port or set of ports being for admission of steam-to
this piston and the other or others for its outlet. These outlet and inlet ports
are arranged to come opposite corresponding passages through the sides of a shell
or body of the apparatus.
The chamber in this shell (in which this piston is capable of 'sliding, guided by
a stem formed on the closed end of said piston) also contains a suitable coiled, or
other spring, and the stem on the end protruding from the shell has a cross bar or
other suitable handle.
The inlet opening is so formed that in its normal or reduced pressure position
only a small fluid way is left open, whilst on the pressure in the piston becoming
increased the piston is forced out overcoming the spring pressure and bringing an
enlargement of fluid way into use and the steam passes to the engine by the outlet
port and passage and the engine is started and run away but as soon as the
pressure becomes relaxed the spring reasserts itself, causes the piston to recede
aud diminishes the size of port for inlet and regulates the revolutions of the
engine.
The stem and handle serve as means for moving the valve piston in case of. need
and by removal of the screwed cap or end of the shell access to the chamber for
the spring and to the piston can be obtained.
By turning the piston by its stem and handle it can be made to serve as a stop
or a free way valve if desired.

page_text: COMPLETE SPECIFICATION.
Improvements in Means or Apparatus for Regulating and
Controlling the Admission of Steam or other Fluid to
Capstan and other Engines.
We DAVIS & COMPANY LIMITED of 12 Fenchurch Street, in the City of
London, Engineers, and WILLIAM ROBERT GARDEN HAY of Garford Street
Engineering Works, Garford Street, Poplar in the County of Middlesex, Director
and Manager of the said company, 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 :-
This invention relates to valve apparatus for regulating and controlling the
admission of steam, or it may be other fluid, to capstan engines and engines for
other purposes, so as to render the revolutions of the capstan engine, or engine
for other purpose regular and uniform, by the operation of the parts themselves
without interference of an attendant, as will hereinafter be fully described, reference
being had to the accompanying drawings.
DESCRIPTION OF THE DRAWINGS.
:
Fig. 1 shows by a vertical sectional view the steam controlling apparatus
according to our present improvements.
Fig. 2 is an elevation looking on the face of the inlet port or passage.
The apparatus consists of a hollow central piston F having an open end F¹ and
two, or other number of ports, one port H, or set of ports, being for admission of
steam to this piston F and the other, I, or others, for its outlet. These outlet and
inlet ports are arranged to come opposite corresponding passages through the
sides of a shell or body A of the apparatus, B being the inlet passage and C the
outlet.
"
The chambers A¹ in this shell A (in which this piston F is capable of sliding,
guided by a stem K formed on the closed end F of said piston) also contains a
suitable coiled, or other spring E and the stem K on the end protruding from the
shell has a cross bar or other suitable handle. L.
The inlet opening H is so formed that in its normal or reduced pressure position
only a small fluid way is left open, whilst on the pressure in the piston becoming
increased the piston is forced out overcoming the spring pressure and bringing an
enlargement of fluid way into use and the steam passes to the engine by the outlet
port I and passage and the engine is started and run away-but as soon as the
pressure becomes relaxed the spring E reasserts itself, causes the piston to recede
and diminishes the size of port H for inlet and regulates the revolutions of the
engine.
•
The stem K and handle L serve as meaus for moving the valve piston in case of
need and by removal of the screwed cap or end of the shell D access to the
chamber A for the spring and to the piston can be obtained.
By turning the piston by its stem K and handle L it can be made to serve as a
stop or a free way valve if desired.
Fig. 3 shows by a vertical sectional view one of other forms of modifications in
the arrangement and proportion of the parts of the apparatus. In this fig. the cap D
is shown extended so as to provide for a longer spring being used.
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. The construction and arrangement of apparatus for regulating and controlling

page_text: the admission of steam or other motive fluid to engines for actuating capstans or
other apparatus (doing its work intermittently or where the load varies) whereby
when the engine is at rest, the piston is kept at its lowest position by spring
pressure so as only to admit a small quantity of steam through a small leading
port, and so that as this pressure increases owing to the outlet being choked by the
engine running slowly, the pressure of steam forces the piston up, overcoming and
compressing the spring, opening the inlet port and admitting more steam, and as
soon as the engine begins to run away a diminution of pressure occurs, and
the spring then forces down the piston shutting the port, substantially as set forth.
2. The construction or arrangement and use of apparatus for regulating and
controlling the admission of steam or other fluid to capstan or other engines, as and
for the purpose set forth and with reference to the drawings.
66
Dated the 17th day of February 1896.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants..