IMPROVEMENTS IN ENGINE GOVERNORS
Year: 1884

page_text: COMPLETE -SPECIFICATION.
I, JOHN LORING HEALD, of Crockett, county of Contra Costa, State of
California, one of the United States of America, Gentleman, do hereby declare
the nature of my invention for IMPROVEMENTS IN ENGINE GOVERNORS; and in
what. manner the same is to bo performed, to be particularly described and
nscertained in and by the following statement:
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My invention relates to certain improvements in-governors, which act by
centrifugal force, and, it consists of a pair of weighted arms crossing each other
dingonally to a central vertical line, and having their, lower ends hinged to a
horizontally rotating disk or table.
To the sides of this table, steel springs are secured behind each arm so as to
curve abovḍ them, the upper ends of the springs being connected by links with
the upper weighted ends of the arms, so that their tendency is to counteract the
centrifugal action of the arms when in motion.
The arms act upon a vertical adjustable central stem, which connects with
double balanced valve, all of which will be more fully explained by reference to
tho accompanying drawings, in which,
Figure 1 is a perspective view of my governor..
Figure 2 is a vertical section of the disk Q, and connected parts.
Figure 3 is a view of guide-sleeve G.
Figures 4 and 5 are views of spring and shackle.
Figure 6 is a side elevation of governor, and section of valves.
Figure 7 is an end elevation of governor.
Figure 8 is a horizontal section of valve chamber.
1]
Figures 9. 10. 11. 12. are detached views of arms and disk. j..
F
A is the casing, within which the valve is contained. This valve is similar to
a piston-valve, and consists of four disks or flanges B upon a central stem O, which
passes through the two inner seats or casings D D..
These casings are bored through the top and bottom, the openings being of such
size that the disks B will just fit within and close then when the valve is closed.
The interior of the casings connect with the boiler through a passage and pipe b,
so that steam is 'received into their interior, and when tho valve is closed the
disks occupying the openings at top and bottom will receive an equal pressure and
be balanced.
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When they are opened the steam will escape equally upward and downward
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into the larger and within the outer can A which surrounds the valvonta D

page_text: and the valves will still remain balanced. The steam passes from the casing A to
the cylinder through the passage d.
A stem E screws into the upper part of the valve or its stem, and extends up
through a stuffing-box F and into a sleeve G, into which it is screwed as shown.
Arms H project from a collar I, which is secured to the stem E below the sleeve G, 5
and serve as lovers by which to turn the stem and screw it into or out of the
sleeve, and thus adjust the valve up or down to suit the speed at which the engine
is to run.
I is a lock-nut with similar arms, this nut locking against the lower part of the
sleeve G to hold the stem E at the desired point. The sleeve G has an arm G¹ 1
extending to one side from it, and the end of this arm slides upon a pin a, by
which the sleevo and the stem are provented from being rotated by the rotation
of the governor arms.
A stem J extends upward from the sleeve G through the part K, which is
supported by an arm L from the top of the valve-casing as shown. A horizontal 1
sleevo M is also supported from K by arms N; and the driving-shaft passes
through this sleeve having a pulley upon its outer end, and a bevel-gear O upon
its inner end, to mesh with and drive the gear P which is secured to the horizontal
disk or table Q.
Upon this table are lugs R, between which the hubs S of the arms T are pivoted
or hinged. From these hubs short arms U extend inward and press upon the top
of the stem J which connects with and actuates the valve. This stem extends up
into a head V, which is free to turn loosely about it, and has spaces or slots at each
side into which the rounded ends of the arms U enter, and when the governor acts,
these arms raise or lower the head V, valve-stems, and valve.
The arms T extend upward and diagonally across each other, and a central
vertical line about which the disk rotates, and their upper ends have weights W
upon them.
To the edge of the disk Q, springs X are fixed in a line behind each of the
arms T, and these springs are curved over above the arms T and weights W.
Links Y connect the upper ends of the springs with the outer ends of the
weighted arms, so that they may move in unison.
The operation will then be as follows:-
The valve is set so that it will be open when the governor is at rest, when it is
set in motion the centrifugal force causes the arms T to move downward, pulling
the springs with them, and the short arms U act to press the valve-stem down
and close the valve. If the engine slows up, the springs act to draw the arms T
up again and open the valve.
The valve is well balanced, the adjustment may be easily made without stopping,
and the peculiar arrangement and relation of the diagonally crossed and weighted
arms, and the connected springs, make it extremely sensitive. The two arms T
move in planes a little on each side of the centre, which leaves room for the
stem J and its head V, through which connection is made with the arms U.
I am aware that single pairs of valves united by bars have been fitted to seats
in the top and bottom of a horizontal steam pipo, so that when opened the steam
could escape above and below, and also that such a valve has been connected
by an adjustable stem with a governor, and I do not claim broadly such a
mechanism.
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. In an engine governor, the centrifugally acting weighted arms, and vertically
moving valve-stem, in combination with a valvo, consisting of the pairs of
horizontal disks, and the corresponding steam and valve chambers with openings
into and out of which the disks may be moved to close or open a steam passage,
and an exterior casing with passages through which steam is admitted to and
discharged from the inner chambers, substantially as herein described,
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page_text: 2. In an engine governor, the centrifugally acting weighted arms, vertically
moving adjustable valve-stem and valve, in combination with the sleeve with its
guide-arm and pin, substantially as herein described.
3. In an engine governor, the weighted arms crossing each other diagonally,
and having their lower ends hinged or journaled at opposite sides of a horizontal
rotary disk or table, in combination with short arms oxtending inwardly from the
lower ends of the diagonal arms, and connecting with a vertically moving valvo-
stem and valve, substantially as herein described.
4. In an engine governor, the weighted arms crossing each other diagonally, and
having their lower ends hinged at opposite sides of a horizontal rotary disk, and
short arms extending inwardly and connecting with a vertically moving valve
through its stem, in combination with flat springs secured to the edges of the disk
behind the diagonal arms curving over them, and connected with their upper ends
by links, substantially as herein described.