An Improved Engine-governor.
Year: 1890

page_text: Date of Application, 22nd May, 1890
Complete Specification Left, 23rd Feb., 1891-Accepted, 11th Apr., 1891
PROVISIONAL SPECIFICATION.
An Improved Engine-governor.
I, ARTHUR BENTALL COLLIS, of The Oddwell, Gestingthorpe, Halstead, in the
County of Essex, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved construction of governor, adapted for
automatically regulating the supply of steam or other fluid under pressure to
motor engines and presenting considerable advantages in comparison with the
ordinary centrifugal governor and throttle-valve, both as regards cost of con-
struction and promptness of action.
An engine-governor constructed according to my invention consists of a disc-
valve mounted to slide freely upon a stem or spindle and arranged within a
conical chamber through which the steam or other fluid under pressure passes
to the engine. The steam enters at the larger end of the conical chamber,
passes round the edge of the disc-valve, and escapes at the smaller end of the
chamber. The pressure of the incoming steam tends to force the valve towards
the smaller end of the chamber, and thus to diminish the area of the annular
passage around the valve. The movement of the valve is, however, resisted by
a spiral spring, which may be mounted upon the spindle and so arranged as to
be capable of manual adjustment from the exterior of the apparatus. The extent
of the valve's motion is limited in one direction by a boss extending from the
casing, and in the opposite direction by a grid, which, notwithstanding the seating
of the valve, allows the passage of steam in sufficient quantity to work the engine
at its minimum power.
Dated 1141 ay of May 1890
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Engine-governor.
1, ARTHUR BENTALL COLLIS, of The Oddwell, Gestingthorpe, Halstead, in the
County of Essex, 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 an improved construction of governor, adapted for
automatically regulating the supply of steam or other fluid under pressure to motor
engines, and presenting considerable advantages in comparison with the ordinary
centrifugal governor and throttle-valve, both as regards cost of construction and
promptness of action.
An engine-governor constructed according to my invention is represented in
longitudinal section in Fig. 1 of the accompanying drawings. Fig. 2 is a similar
view shewing a modification; Fig. 3 being a corresponding view, partly in section,
in a plane at right angles to the plane of Fig. 2.
The improved governor comprises a disc-valve a mounted to slide freely upon a
stem or spindle 6 and arranged within a conical chamber c through which the
steam or other fluid under pressure passes to the engine. The steam, which is

page_text: admitted by way of the pipe to the steam space, enters at the larger end of the
conical chamber, passes round the edge of the disc-valve, and escapes at the smaller
end of the chamber, through the cylindrical part e, into the pipe e.
The pressure
b
of the incoming steam tends to force the disc or valve towards the part e', and thus
to diminish the area of the annular passage between the valve and the sides of the
conical chamber. The movement of the valve is however resisted by a spiral
spring, which may be mounted upon the spindle b, as shewn, and so arranged as
to permit of its being adjusted from the exterior of the apparatus. I prefer to
adjust the spring by causing the spindle to move longitudinally. In the con-
struction shewn, by way of example, in Fig. 1, the spindle 6 works through packing
in a stuffing-box and gland on the cover of the casing, which is extended to form
a stop g for limiting in one direction the motion of the valve a.
The cover g
carries a cross-bar h, supported by rods . The outer part of the spindle is
screw-threaded and engages with a screw-thread cut in a hole in the cross-bar.
The end of the spindle is provided with a hand-wheel. The spindle locked in
any desired position by a back-nut ², which is screwed up against the cross-bar h.
After loosening the back-nut 2, the spindle can, by means of the handle, be
turned so as to bring the nut * nearer to or take it further from the valve a,
according to whether it be desired to increase or lessen the tension on the spring f.
When the valve a enters the cylindrical part e, the supply of steam, except by
leakage, is entirely cut off. The movement of the valve a, as previously explained,
is limited in one direction by the stop or collar g'; its movement in the other
direction may be limited by a grid or seating or a series of projections at the end
of the part so made as not to prevent the passage of steam in sufficient quantity to
work the engine at its maximum power. Or the valve and seating may be so
formed as to throttle the supply of steam, or even to cut it off in the event of a
pipe between the governor and the engine bursting.
b
In Figs. 2 and 3, instead of the valve a, a balanced valve a' a" is shewn. Steam
enters by way of the pipe dx and passes out to the slide-jacket of the engine
through the pipe ex. It will be seen that the pressure of the steam on the larger
part a tends to close the valve, whereas the pressure of the steam on the smaller
part a tends to open it; such construction enabling extreme sensitiveness to be
attained.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, I claim :-
1. The improved engine-governor adapted for automatically regulating the
supply of steam or other fluid under pressure, substantially as described with
reference to the accompanying drawings; the same comprising a disc or valve
working against the action of a spring in the steam supply passage, and serving
to diminish the effective area of the passage when the quantity of steam supplied
is excessive or to increase the effective area thereof when the quantity is deficient.
2. In an engine-governor adapted for automatically regulating the supply of
steam or other Huid under pressure, the combination of a disc or valve, such as a,
with a conical passage, such as c, substantially as and for the purposes set forth.
3. In an engine-governor adapted for automatically regulating the supply of
steam or other fluid under pressure, the combination of a disc or valve, such as a,
with a spindle, such as b, and a spring, substantially as and for the purposes set
forth.
4. In an engine-governor adapted for automatically regulating the supply of
steam or other fluid under pressure, the combination of a dise or valve, such as a, a
spindle and a spring f with a conical passage, such as c, substantially as and for
the purposes set forth.
5. In an engine-governor adapted for automatically regulating the supply of
steam or other fluid under pressure, the combination of a disc or valve, such as a, a

page_text: screw-threaded spindle & passing through and engaging with a cross-bar h, and a
spring with a conical passage, such as c, substantially as and for the purposes
herein set forth.
DL: 101 1 of Wober 1801
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Agent for the Applicant.