Year: 1894

page_text: Sweden),
Date of Application" (in United Kingdom), 28th July, 1894
Complete Specification Left, 17th. Apr., 1895-Accepted, 18th July, 1895
- I, CARL GUSTAF PATRIK DE LAVAL of 16 Handtverkaregatan, Stockholm,
Sweden, Doctor of Philosophy and Engineer, do hereby declare the nature of this
invention to be as follows:
This invention relates.to.a.mode of regulating steam,motors and.is characterized
by the arrangement of a piston working easily in a cylinder and connected: to..the
appliance which determines the steam-admission and which in every position is
balanced by the steam pressure-extant by the pressure of..a.liquid in constant.flow,
and by a spring or analogous appliance. In the liquid conduit are inserted.one.or
more throttling devices or valves or cocks.which determine the, pressure action..of
the feed water upon the piston, and one of these cocks is connected to..the motor
governor. All according to the movements of this governor the pressure of the
liquid upon the one side of the piston will thus vary and thereby the position of the
piston in the cylinder is varied and adjusts accordingly the..steam admission
device.
On the accompanying drawing is shewn an arrangement which..illustrates, the
invention. A is a cylinder with a piston B working easily therein. The latter.is
on one side acted upon by the pressure of the steam which is let in by the inlet
pipe E, and let out to the motor:. by the pipe F, and. on the other side, the
piston is acted on by the spring S, and by the pressure of.. aliquid flowing
through the cylinder which is let in through the pipe Dand let..out
through the pipe .G. This liquid may suitably consist of the feed water
to the steam boiler. The inlet pipe D is provided with a throttling.device..the
tap L for instance which is so set that the liquid pressure on the piston can, be
varied within desired limits by opening or closing a throttling device, the tap,H.for
instance on the outlet pipe. G. This tap is connected, directly or indirectly, with the
motor governor.
From this arrangement it is evident that as the tap. His opened or throttled by the
governor, so, will the pressure on, the piston of the liquid flowing through the cylinder
be decreased. or increased and the piston will thus, move in one direction or the other
till the power of the spring establishes equilibrium increasing or decreasing during
this movement. The mechanism. for admitting the driving fluid will thereby be
influenced accordingly.
The spring S may. of course be, arranged on the other side of the piston B, acting
as. a pressure spring. Or other arrangements may be substituted. The chief.and
material thing is that a. pressure is.to be produced. having the quality of increasing
or decreasing. by the movement of the piston in reverse. directions. Hence for the
spring S may be substituted any other elastic body, solid or gaseous such..for
instance as air or other gas enclosed by a piston in a cylinder.

page_text: Finally it should be noted that especially in such cases where the motions of the
steam inlet appliance are small a diaphragm may be used, a membrane or
analogously working mechanical element, instead of the piston B.
Dated this 28th day of July 1894.
Improvements in means for Governing Swa.
I, CARL GUSTAF PATRIK DE LAVAL of 16A Handtverkaregatan, Stockholm,
Doctor of Philosophy and 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 :-
This invention relates to a mode of regulating steam motors and is characterized
by the arrangement of a piston working easily in a cylinder and connected to the
appliance which determines the steam admission to the motor in question and which
in every position is balanced on the one hand by the steam pressure extant on the
other hand by the pressure of a liquid in constant flow, together with a spring or
analogous appliance. In the liquid conduit are inserted one or more throttling
devices or valves or cocks which determine the pressure action of the feed water
upon the piston, and one of these throttling devices is connected to the motor
governor. All according to the movements of this governor the pressure of the
liquid upon the one side of the piston will thus vary, and thereby the position of the
piston in the cylinder is varied and adjusts accordingly the steam admission to
the motor.
On the accompanying drawing is shewn an arrangement which illustrates the
invention. A is a cylinder with a piston B working easily therein. The latter is
on one side acted upon by the pressure of the steam which is let in by the inlet
pipe E and let out to the motor by the pipe F, and on the other side the piston is
acted on by the spring S and by the pressure of a liquid flowing through the
cylinder which is let in through the pipe D and let out through the pipe G. This
liquid may suitably consist of the feed water to the steam boiler. The inlet pipe D
is provided with a throttling device, the tap L, for instance, which is so set that the
liquid pressure on the piston can be varied within desired limits by opening or
closing a throttling device, the tap H for instance on the outlet pipe G. This
throttling device is connected directly or indirectly with the motor governor. From
this arrangement it is evident that as the tap H is opened or throttled by the
governor, so will the pressure on the piston of the liquid flowing through the
cylinder be decreased or increased, and the piston will thus move in one direction
or the other till the power of the spring establishes equilibrium increasing or
decreasing during this movement. The mechanism for admitting the driving fluid
to the motor through the pipe F will thereby be influenced accordingly.
The spring S may of course be arranged on the other side of the piston B, acting
as a pressure spring. Or other arrangements may be substituted. The chief and
material thing is that a pressure is to be produced having the quality of increasing
or decreasing by the movement of the piston in reverse directions. Hence for the
spring S may be substituted any other elastic body, solid or gaseous such for
instance as air or other gas enclosed by piston in a cylinder.
Finally it should be noted that specially in such cases where the motions of the
steam inlet appliance are small a diaphragm may be used, a membrane or
analogously working mechanical element instead of the piston B.

page_text: Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In means for regulating steam motors the combination of a piston, working
easily in a cylinder connected to the appliance which determines the steam admission
to the motor, said piston being acted upon one side by the pressure of the steam and
on the other side by a spring or its equivalent together with the pressure of a
liquid, flowing through the cylinder and in the conduit for which liquid is inserted
a throttling device, connected to the motor governor substantially as and for the
purpose set forth.
2. The construction of apparatus described with reference to the accompanying
drawing.
Dated this 17th day of April 1895.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.