Improvements in Marine Steam Engine Governors.
Year: 1895

page_text: Date of Application, 4th June, 1895
C
AL
4805
Annanta
Otat Dan
4006
Date of Application, 4th June, 1895
Complete Specification Left, 15th Nov., 1905 Accepted, 21st Dec., 1906
PROVISIONAL SPECIFICATION.
Improvements in Marine Steam Engine Governors.
I JOHN PATON of 29 Newry Street Holyhead Engineer do hereby declare the
nature of this invention to be as follows:-
The object of this invention is to prevent accidents arising from racing. And
in order that my invention may be clearly understood I refer to the accompanying
sheet of drawings in which A represents a spindle driven at a high speed by the
engine to be governed-Z and Z, the bearings-V, a small toothed wheel fitted
loose on the spindle-F and F, friction collars to give the wheel a tendency to
revolve along with the spindle-W, a larger toothed wheel gearing with V-
T, a crank pin and connecting rod to shut and open the throttle valve-
E, an escapement to controll the movements of the wheel W-H H a centrifugal
force generator and C, a compressed spring. The pressure of the spring ballances
the centrifugal force when the speed is normal; the instant racing begins the.
increased centrifugal force adds to the compression of the spring and moves the
escapement allowing the wheel W to make the first half of a revolution thereby
instantly shutting the throttle valve the instant racing ends the unbalanced.
pressure of the spring moves back the escapement allowing the wheel to complete
the revolution opening the throttle valve and so on continuously.
Dated this 3rd day of June 1895.
I, JOHN PATON of 29 Newry Street Holyhead, County of Anglesey 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 :-
The object of this invention is to prevent accidents arising from racing without
reducing the speed of the ship more than is really necessary.
I accomplish this object by means of a governor designed not to anticipate
racing by shutting off the steam before it begins but to anticipate a return to the
normal speed by letting on the steam a little before it is reached.
The accompanying drawing Figure 1, represents a view of a governor according
to my invention. AA, is a rigid iron frame made to revolve on suitable gudgeons
by the engine to be governed everything within the frame revolves along with it
and the whole is accurately ballanced about the axis which I prefer to be vertical.
f and F, are iron balls. C F, is a centrifugal force generator, it is fitted so as to
be capable of revolving easily in suitable bearings, its axis cuts the axis of the
frame at right angles, its centre of gravity lies in the point of section and its
movements are limited by the stop T. E, is a spring opposing the generated force
and ballancing it when the generator does not touch the stop. Z, is a bar fitted so
as to slide easily within the gudgeon H, a cam c is formed on one side of it, it is
moved by the generator as shown in the drawing and its weight is ballanced by the
SD 037

page_text: ball W, so that its movements cannot be affected by the rolling of the ship.
L, is a lever for shutting off and letting on the steam, it divides into 2 arms m
and n so situated that the cam c, in revolving shall come into contact with the one
or the other of them when it comes into contact with m the steam is immediately
let full on, when it comes into contact with n the steam is immediately shut off.
Figure 2 represents a bird's eye view of the lever L.
The size of governor represented by the drawing has a speed of 100 revolutions
per minute when the engine is going full speed, the generated centrifugal force
1002 × 6 × 60
is
5870
=
= 68-16 pounds and the resistance of the spring to ballance this
136.32, showing that a strain of 136.32 pounds must be put on the
spring before the governor is started.
is 68.16 × 2 =
A speed of 103 revolutions per minute will cause the generator to fly round until
the ball comes into contact with the stop T, moving the cam so that it shall come
into contact with the arm n shutting off the steam almost instantly; the centri-
1032 x 1.16 x 60
5870
fugal force will become
126.4 pounds and the resistance of the
spring to ballance this is 126.4 x 2 = 252.8 showing that the spring must be
constructed to carry 252-8 pounds with an elongation of 3.35 inches.
When the speed again becomes less than 103 the unballanced force of the spring
will move the cam e so as to come into contact with the arm n letting on full steam,
and so on continuously.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is―
The device for confining racing within safe limits without needlessly reducing
the speed of the ship substantially the same as herein described and shown by the
drawing.
Dated this 14th day of November 1895