Improvements in Governors for Controlling the Speed of Engines or other Machinery.
Year: 1891

page_text: Date of Application, 22nd Dec.. 1891
Complete Specification Left, 22nd Sept., 1892-Accepted, 3rd Dec.. 1892
PROVISIONAL SPECIFICATION.
Improvements in Governors for Controlling the Speed of Engines or
other Machinery.
WILLIAM HORNSBY Spittlegate Iron Works Grantham Engineer ROBERT
EDWARDS Spittlegate Iron Works Grantham, Engineer do hereby declare the
nature of this invention to be as follows:
This invention relates to improvements in governors such as are used for controlling
the speed of engines and the like.
The governor is constructed with a central spindle which is run in a suitable
guide or bearings at its lower end. Immediately above the guide a cross arm is
keyed on the spindle & pivoted at the ends of this cross arm are bell cranks the
lower arms of which project downwards and have balls on them. The other arms
project in a horizontal direction towards the governor spindle & have rollers on the
end of them.
A coiled spring is placed round the spindle resting on the top of the cross arm.
A sleeve encircling the spindle &.spring is placed on the top of the spring & this is
carried down and the rollers of the bell cranks rest on a projection from it; this
sleeve is then further carried down outside the cross arm and encircles the spindle
guide, a groove or the like being made in its bottom part so that a fork or ring
can be placed in the groove to convey the up & down motion of the sleeve
as the governor works, but still allow the sleeve to revolve with the governor.
By putting a cross arm on the governors close to the guide, the weight of the
cross arm & balls is brought very close down to the guide thus avoiding all top
heavy weight some distance away from the guide as is usual in most governors.
December 16th 1891.
WILLIAM HORNSBY.
R. EDWARDS.
COMPLETE SPECIFICATION.
Improvements in Governors for Controlling the Speed of Engines or
other Machinery.
We, WILLIAM HORNSBY and ROBERT EDWARDS, both of Spittlegate Iron
Works, Grantham, in the County of Lincoln, Engineers, 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 improvements in centrifugal governors such as are used
for controlling the speed of engines and the like.
In carrying out the invention we provide a central spindle which runs in a suitable
guide or bearing. Immediately above this guide or bearing a cross-frame is keyed
on the spindle and pivotted at each end of this cross-frame is a bell-crank lever,
one arm of which projects downwards and has a ball thereon whilst the other arm
projects towards the governor spindle and has a roller on its end.
A coiled spring is placed around the spindle and bears at one end on the top of
the cross-frame whilst the other end bears against the cap of a sleeve enclosing the
spindle and spring. This sleeve is provided with a projecting flange upon which
the rollers of the bell-crank levers rest and is carried down outside the cross-frame
and provided with a grooved ring or the like at its lower end so that a fork or ring
can be placed in the groove to transmit the up and down motion of the sleeve to a
lever or the like as the governor works.
By using a cross-frame on the governor spindle close to the guide or bearing
Price T

page_text: the weight of the cross-frame and balls is brought very close down to the guide,
thus avoiding all top heavy weight some distance away from the guide or bearing
as is usual in most governors.
To enable our invention to be fully understood we will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is a sectional front elevation of a governor constructed according to our
invention:
Figure 2 is a side elevation of the same, certain parts being removed; and,
Figure 3 is a plan :
Figures 4, 5 and 6 are views similar to Figures 1, 2 and 3 respectively illustrating
a modification of our invention.
Similar letters of reference indicate corresponding parts in the several figures.
a is the spindle of the governor, and the guide or bearing in which the said
spindle is rotated. c is the cross-frame which is secured to the spindle by the
key d and at the outer ends of which the bell-crank levers e, e are pivotted ;
each of which levers is provided with a ball on one arm and with a roller
upon the other arm.
h is the spring surrounding the spindle a and is the sleeve enclosing the same,
the said sleeve having at its upper end a cap against which the spring / bears
at one end and having its lower part extended downwards into proximity to
the bearing b as at k, k, slots being formed in the sleeve to allow it to pass over the
arms of the cross-frame c. 7 is the flange which is formed upon the sleeve i and
upon which the rollers 9, 9 of the bell-crank levers e, e rest. m is the grooved
ring which is secured to the lower ends of the downwardly extending portions k, k
of the sleeve, and n is a ring located in the groove of the ring m and having
connected to it the lever o through the medium of which the movements of the sleeve
are transmitted to the throttle or other regulating valve.
With the construction herein before described it will be obvious, assuming the
parts to be in the position shewn in Figure 1, that when the governor rotates the
balls will fly outwardly and thereby move the bell-crank levers e, e to draw down
the sleeve against the pressure of the spring and so impart motion to the lever
the spring serving to return the balls towards or into their normal positions as
the speed decreases or the governor stops.
وف
In the arrangement of the invention shewn in Figures 1 to 3 the projecting
portions k, k of the sleeve i extend down so far that the ring m will encircle the
bearing, thereby enabling the cross-frame c to be in close proximity to the said
bearing. In the arrangement shewn in Figures 4 to 6, however, the ring m is
adapted to slide upon the spindle a instead of upon the bearing ; in which case it
is necessary to provide a greater space between the cross-frame e and the bearing b,
as shewn.
Having now particularly described and ascertained the nature of our said inven-
tion and in what mauner the same is to be performed, we declare that what we
claim is :-
1. A centrifugal governor having the balls attached to the downwardly projecting
arms of bell-crank levers, the other arms of which act on a sleeve controlled
by a spring, whereby the cross-frame carrying the said bell-crank levers can be
brought nearer to the bearing in which the spindle rotates, substantially as
described.
2. The manufacture and use of a centrifugal governor substantially as herein-
before described and illustrated in Figures 1 to 3 and Figures 4 to 6 of the
accompanying drawing.
Dated this 22nd day of Coutanchion 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.