Improvements in Mechanism for Regulating the Speed of Motive Power Engines.
Year: 1885

page_text: Improvements in Mechanism for Regulating the Speed of Motive
Power Engines.
I SAMUEL BUTTERWORTH, of 7 Rushcroft Road, High Crompton, near Oldham
in the County of Lancaster, Engineer do hereby declare the nature of the said
invention for "IMPROVEMENTS IN MECHANISM FOR REGULATING THE SPEED OF
MOTIVE POWER ENGINES, to be as follows:-
My invention consists in an improved apparatus to be placed on any convenient
rod between the governor and the expansion or throttle valve to assist in regulating
the speed of the steam or other motive power engine the slide valve being worked
from the ordinary eccentric.
In performing my Invention I connect one of the rods from the governor to
a bush which is screwed or tapped at the other end into which the other part of
the rod connected to the valve is screwed; on the outer surface of the bush are two
ratchets with teeth cut in opposite directions, the bush rests in a sleeve which
covers or may cover the ratchets when the engine is running at its normal speed.
The sleeve has a shank or stem which is supported in a bearing carried by the
engine frame and on the sleeve are fitted two bushes connected at their adjoining
sides to a lever which receives an oscillating movement from any convenient part
of the engine; at the other end of each bush is a spring pawl and when a variation
of speed in the engine lengthens or shortens the rod thereby moving the bush
partly out of the sleeve one or other of the ratchets is exposed to the action of its
pawl by which means the bush is turned to shorten or lengthen the rod and bring
the engine back to its normal speed.
To the screwed end of the rod that goes to the valve is connected an extra rod
which is so placed and shaped that when the first named rod has been moved a
certain distance by the governor, the extra rod lifts the pawl out of gear with its
ratchet thereby avoiding over winding of the apparatus and preventing the engine
from running away.

page_text: COMPLETE SPECIFICATION.
Improvements in Mechanism for Regulating the Speed of Motive
Power Engines.
I SAMUEL BUTTERWORTH, of 7 Rushcroft Road, High Crompton, near Oldham,
in the County of Lancaster, Engineer, do hereby declare the nature of said
Invention for IMPROVEMENTS IN MECHANISM FOR REGULATING THE SPEED OF
MOTIVE POWER ENGINES, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
My invention consists in an improved apparatus to be placed on any convenient
rod between the governor and the expansion or throttle valve to assist in regulating
the speed of the steam or other motive power engine, the slide valve being worked
from the ordinary eccentric.
In performing my Invention I connect one of the rods from the governor to
a bush which is screwed or tapped at the other end into which the other part of
the rod connected to the valve is screwed; on the outer surface of the bush are two
ratchets with teeth cut in opposite directions, the bush rests in a sleeve which
covers or may cover the ratchets when the engine is running at its normal speed.
The sleeve has a shank or stem which is supported in a bearing carried by the
engine frame and on the sleeve are fitted two bushes connected at their adjoining
sides to a lever which receives an oscillating movement from any convenient part
of the engine; at the other end of each bush is a spring pawl and when a variation
of speed in the engine lengthens or shortens the rod thereby moving the bush
partly out of the sleeve one or other of the ratchets is exposed to the action of its
pawl by which means the bush is turned to shorten or lengthen the rod and bring
the engine back to its normal speed.
To the screwed end of the rod that goes to the valve is connected an extra rod
which is so placed and shaped that when the first named rod has been moved a
certain distance by the governor, the extra rod lifts the pawl out of gear with its
ratchet thereby avoiding overwinding of the apparatus and preventing the engine
from running away.
And in order that my Invention may be fully understood and readily carried
into effect I will describe the accompanying Sheet of Drawings, reference being
had to the figures and letters marked thereon.
Figures 1 and 2 are side elevations of my improved mechanism for regulating
the speed of a steam engine Fig. 3 is a plan of the same and Fig. 4 a sectional view
of part of Fig. 1.
În these views.-a represents the rod from the governor which rod is connected
at a¹ to one end of a long bush or sleeve b, to the other end of which is secured
a brass or other nut o and into this nut c is screwed one end of a rod d connected
to the valve for regulating the admission of steam to the engine. The rods a and d
are thus coupled together by the bush 6 by means of which the length of the said
rods can be adjusted so as to cause more or less steam to be admitted to the engine.
The bush 6 is supported in a stationary sleeve e which is provided with a stem or

page_text: shank e which is fitted into a bracket f secured to the engine frame g. On each
side of the centre of the bush b and round its periphery are formed or secured two
ratchets 61 63 the teeth of which are cut in opposite directions to one another and
when the engine is running at its normal speed, the ratchets are covered by the
sleeve e; on the ends of the sleeve e are fitted two bushes h h¹ which are connected
together and to a lever i by a stud j. An oscillating or reciprocating movement
is imparted to the lever i and so to the bushes h h¹ by means of the elbow lever k
which is pivoted at ¹ to a bracket secured to the engine frame and the elbow
lever receives its motion from a rod l secured to the crosshead or other convenient
reciprocating part of the engine. To each of the bushes h and h¹ is pivoted a
spring pawl n n¹ which acts upon one or other of the ratchets b¹ 6 when the speed
of the engine varies. On the rod d is secured a bracket d¹ which carries a sinall
rod o the end of which passes through holes in projections h³ h³ on the bushes h h¹
and near the upper end at o¹ the rod o is shaped or bevelled off so as to take up
the pawl n and raise it clear of its ratchet b¹ as occasion requires.
The operation of the mechanism is as follows:-The rods a and d are set or
adjusted in the first place by hand, when the engine is running at its desired or
normal speed by simply turning the bush b until the ratchets 61 63 are covered by the
bushes h h on the sleeve e and the spring pawls n n¹ on the latter are out of gear.
The rod moves to and fro with the crosshead or other reciprocating part and so
by the elbow lever k and lever i transmits an oscillating movement to the
bushes h h and pawls n n¹ and so long as the engine runs at its normal speed the
pawls move to and fro but do not act upon their ratchets. When, however, the
speed of the engine increases or diminishes the governor balls rise or fall and so
move the rod a which causes the bush b to slide in the stationary sleeve c.
movement of the bush exposes one of the ratchets b¹ b¹ to the action of its pawl n
or n¹ by means of which the bush b and the nut c secured to it are turned thus
lengthening or shortening the rod d and effecting the earlier or later cut off of the
admission valve.
This
When the engine has by these means regained its normal speed the movement
of the governor balls will have been transmitted by the rod a to the bush b and
the ratchets 61 62 will have resumed their normal position, i.e., free of the pawls n n¹
and covered by the bushes h h¹ on the sleeve e.
The function of the rod o is to prevent the apparatus from being over wound
and consequently damaged when the steam pressure falls below a given point.
In the arrangement shown as steam pressure decreases the governor rod a is
shortened and the ratchet b' is brought under the pawl n which turns the bush b
and nut c and alters the length of the rod d so as to admit more steam to the
engine; but if the steam pressure has fallen too low for this to be effected the
ratchet b¹ with the bush b and nut c will be turned further and further so that
the projection o¹ on the rod o comes into contact with the pawl n and raises it out
of gear with the ratchet b¹ until the speed of the engine again increases and the
action of the governor lengthens the rod a thereby moving down the bush b, nut c,
and rod d and with the latter the rod o. As the rod o is lowered it carries down
the pawl n into gear with the ratchet b¹ and the mechanism is actuated as already
described until the engine has regained its normal speed.
I have described my Invention as applied to a steam engine but it is obviously
applicable to other motive power engines.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1. The construction, combination, and general arrangement of parts forming
my improved mechanism for regulating the speed of steam or other motive power
engines, substantially as herein shown and described.
2. In mechanism for regulating the speed of motive power engines a rod
actuated from the governor and secured to a bush supported in a stationary

page_text: bearing or sleeve and a rod connected to the expansion or throttle valve and screwing
into said bush on which are formed or secured two ratchets with teeth cut in
opposite directions in combination with two bushes which are connected together
and carry spring pawls for said ratchets and receive an oscillating movement by
means of suitable mechanism from any convenient reciprocating part of the engine,
substantially in the manner herein set forth for the purposes specified.
3. The combination with the mechanism defined by the second claiming clause,
of the rod o, or its equivalent, secured to or actuated from the rod connected to the
expansion or throttle valve, substantially as and for the purposes described.
D
ليم
ст
1000