Steam and other Engines or other Motors by Electricity.
Year: 1886

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Date of Application, 10th Apr., 1886.
Complete Left, 10th Jan., 1887.
Complete Accepted, 11th Feb., 1887.
Steam and other Engines or other Motors by Electricity.
We JOHN RICHARDSON of the firm Robey and Co. of Lincoln, Engineer, and RALPH
HENRY CHRISTOPHER NEVILE of Wellingore Hall, near Grantham, Lincolnshire do.
hereby declare the nature of this invention to be as follows:-
This invention relates to an improved method of controlling the speed of Engines or
other motors by means of electricity.
The apparatus generally is similar to that described in Specification of Letters
Patents Numbers 288 of 1881 and 941 of 1882 granted to one of us, but instead of
the core of the solenoid acting direct upon a throttle valve thus varying the pressure
of steam, or acting upon the link of an ordinary expansion gear it is made to control
the position of the releasing apparatus of a trip gear such as a Pröell Gear, Corliss.
Gear, or any other similar arrangement. The solenoid may either control the releasing
gear directly by means of levers or other suitable apparatus, or by moving the valve
of a steam or hydraulic cylinder, the piston of which controls the releasing gear.
H. GARDNER,
166, Fleet Street, London,
Agent for the said J. Richardson and
R. H. C. Nevile.

page_text: Steam and other Engines or other Motors by Electricity.
We, JOHN RICHARDSON of the firm Robey & Co., Lincoln, Engineers, and RALPH
HENRY CHRISTOPHER NEVILE of Wellingore Hall, near Grantham Lincolnshire 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 method of controlling the speed of Engines or
other motors by means of electricity. The apparatus generally is similar to that described
in Specification of Letters Patents Nos. 288 of 1881 and 941 of 1882 granted to one of us,
but instead of the core of the solenoid acting direct upon a throttle valve thus varying the
pressure of steam, or acting upon the link of an ordinary expansion gear it is made to
control the position of the releasing apparatus of a trip gear such as a Pröell Gear,
Corliss gear, or any other similar arrangement. The solenoid may either control the
releasing gear directly by means of levers or other suitable apparatus, or by moving
the valve of a steam or hydraulic cylinder, the piston of which controls the releasing
gear.
The way in which the solenoid is made to act upon the trip or releasing gear will
be clearly understood by reference to the annexed drawings in which Figures 1 and 2
are side and end elevations respectively of the improved apparatus for controlling the
speed of a steam engine. a is a solenoid which may be double as shown, or single it
is connected by the lever whose fulcrum is at e to the rod d by means of which it
raises the collar e upon which the tripper levers ff rest. The short arms of the
tripper levers ff, raise alternately the levers and g¹ (whose fulcrums are at h
and respectively) by means of the arm i which is connected to the engine excentric or
by means of any well known or suitable mechanism driven, from the engine. The
levers and g operate upon their valve rods ; to admit steam through a valve k at
alternate ends of the cylinder 7.
As the collar e is raised by the solenoid the short arms of the levers and fare
drawn inwards in the direction of the arrows and thus the levers y and y₁ are raised
earlier and the cut off of steam takes place at an earlier part of the stroke. m is an
electro magnet in the same electric circuit with the solenoid a and n a weight forming
the armature to the same so that if the electric circuit be accidentally broken at any
part thereof, the weight falls and by means of the lever p raises the trippers f and f
and cuts off the steam. A similar arrangement of solenoid and levers may be applied
to Prüell, Corliss, or other engines.
Figure 3 shows a modification with intermediate action of a steam or hydraulic

page_text: cylinder. In this arrangement the lever moves the valve 7 (which may be of slide,
piston, or other form) of a hydraulic or steam cylinder r, the pistons of which is on
the rod d carrying the collar e upon which the tripper levers rest as in the method
hereinbefore described.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed we declare that what we claim is :-
1. The method of adjusting the tripping arrangement of steam engines or other
motors by the application of a direct acting solenoid to the releasing or trip expansion
gear.
2. The improved method and apparatus for controlling the speed of steam engines
or other motors by electricity hereinbefore described and substantially as shown on the
annexed drawings.
H. GARDNER,
166, Fleet Street, London,
Agent for the said J. Richardson and
R. H. C. Nevile.