Automatic Governor for Starting, Stopping, and Controlling Compound Engines which are subjected to Intermittent Running.
Year: 1890

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Date of Application, '16th May, 1890
.Complete Specification Left, 5th Feb., 1891-Accepted, 28th Mar., 1891
PROVISIONAL SPECIFICATION.
Automatic Governor for Starting, Stopping, and Controlling Compound
Engines which are subjected to Intermittent Running.
JAMES ALFRED TOWLER, 31, Bismarck Street, Beeston Hill, Leeds,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:
The invention consists of a governor, an equilibrium stop-valve, an equilibrium
bye-pass & a weighted lever. The governor is of the high-speed type in which
centrifugal force is balanced by a spring, the governor spindle is attached directly
to a piston valve of the equilibrium type which is connected with the low pressure
cylinder valve chest, when the governor is stopped this valve is open, but when it
commences to revolve it closes this valve & as the speed increases it gradually
closes the main equilibrium. valve, the latter being kept open by a spring; the
connection between the governor & the main equilibrium valve being adjustable
while the governor is running thus enabling the valve to be closed at any desired
speed. The spindle of the main equilibrium valve is projected through a stuffing
box & attached to a weighted lever so that the valve may be made, to open & close
by any motion transmitted to the lever for such a purpose.
Dated this 16th day of Mov 1900
JAMES. ALFRED TOWLER.
COMPLETE SPECIFICATION.
Automatic Governor for Starting, Stopping, and Controlling Compound
Engines which are subjected to Intermittent Running.
I, JAMES ALFRED TOWLER, of. 31, Bismark Street, Beeston Hill, Leeds, 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 invention relates to an automatic governor arranged in connection with
equilibrium stop and by-pass valves and an operating lever, for starting, stopping,
and controlling a compound engine subject to intermittent running as I shall describe
referring to the accompanying drawing which is a longitudinal section partly in
elevation. G is the governor, of the high speed type in which the centrifugal force
is balanced by a spring S. The spindle of the governor is attached to a piston
valve P which governs a passage A leading to the valve chest of the low pressure
cylinder, the valve P. and the ports leading to A being so situated, that, when the
governor is at rest, the communication is open and consequently steam can then pass
from the stop valve box B to the low pressure cylinder; but when the governor is
revolving at even a moderate velocity, the valve P closes the ports of A, and con-
sequently the low pressure cylinder is not supplied with steam from B, but with the
exhaust of the high pressure cylinder.
The equilibrium or double-beat stop valve consists of the two connected valves C
and D governing the passage E to the high pressure valve chest. The valve is
urged to open by a spring T; it is internally threaded forming a nut for the screwed
spindle F, and it is prevented from turning by studs H. The spindle F passes
through a stuffing box to a hand wheel W by which it can be turned. L is a loaded
bell crank lever the short arm 1 of which is made to fork over the spindle F in front
of the boss of the wheel W. When the lever L is allowed to descend its short
arm acting against the boss of W draws back the valve rod F and closes the
valves CD, but, when L is raised by a chain M or otherwise, the spring T causes
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the valve K to open until the end of the spindle F meets the front end of the
piston valve P the position of which is determined by the governor G, this
determining the extent to which the valves C and D are opened. By turning the
hand wheel W so as to make the end of the spindle extend more or less forwards,
the extent of opening of the stop valve can be adjusted so as to vary the speed of
the engine as desired, and this can be done while the engine is in action. When the
engine is employed for pumping water to high pressure or for compressing air or
other gas, the lever L may be connected to a weight moved by the accumulator or
by a piston subject to the pressure of the water or air or gas so that, when a
predetermined pressure is attained, the lever descends and closes the stop
valve C D.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I claim :—
1. In a compound engine, in combination with a centrifugal governor, a piston
valve attached to the governor spindle governing a port supplying high pressure
steam to the low pressure valve chest, and an equilibrium stop valve governing
supply to the high pressure valve chest, this valve being urged by a spring to open,
and being closed when the piston valve is moved by the governor over an adjustable
distance, substantially as described.
2. In a valve arrangement such as is above referred to, making the stop valve to
fit as a nut on a screwed spindle that can be turned by an external handle, so as to
adjust the position at which the piston valve moved by the governor closes the stop
valve, substantially as herein described.
3. In combination with a valve arrangement such as is above referred to, a loaded
lever which, when free to descend, closes the stop valve, substantially as and for the
purposes set forth.
Deted this 5th dox of Wahov 1901
ABEL & IMRAY,
Agents for the Applicant.