In- STEAM GUVERNURS
Year: 1875

page_text: LETTERS PATENT to Daniel La Forest Chase, of Boston, of the State
of Massachusetts, of the United States of America, for the In-
STEAM GUVERNURS.
ATT STATT TANNY
VEMEN
ΤΟ ΠΟΤΑΤΙΟΑ
Scaled the 11th Junc 1875, and dated the 21st April 1875.
COMPLETE SPECIFICATION filed by the said Daniel La Forest Chase
at the Office of the Commissioners of Patents, with his Petition
and Declaration, on the 21st April 1875, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS MAY COME, I, DANIEL
LA FOREST ОHASE, of Boston, of the State of Massachusetts, of the
United States of America, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS IN
STEAM GOVERNORS," and have petitioned Her most Excellent Majesty
Queen Victoria to grant unto me, my executors, administrators, and
assigns, Her Royal Letters Patent for the same, and have made solomn
Declaration that I am the first and truc Inventor thereof.

page_text: NOW KNOW YE, that I, the said Daniel La Forest Chase, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following Specification, reference being had to the accompanying
Drawings and to the letters and figures marked thereon (that is to
say) :—
The object of my Invention is to increase the sensitiveness of the
centrifugal governor. This I effect by dispensing with steam packed
· valve stems, jointed arms, etc., and thus avoid the friction consequent on
the use thereof, and my Invention consists,-
-
First. In constructing a steam governor with a steam chamber pro-
vided with induction and eduction ports, and locating in such chamber a
rotary steam conductor or conductors provided with valve ports, and
having valves which shall close such ports by the direct action of their
contrifugal force.
1
Second. In constructing a steam governor with a steam chamber pro-
vided with induction and eduction ports, and locating in such chamber a
stationary steam conductor provided with valve ports, and having a
valve which shall close such ports by the centrifugal action of balls or
weights attached to a spring affixed to the driving shaft, and having its a
ends connected with the valve on opposite sides thereof.
The essential parts of the governor consist of a hollow steam chamber
having a removable cover or part and the enclosed centrifugal
mechanism herein-after explained, the arrangement of the centrifugal
mechanism within the said steam chamber constituting the main feature
of the Invention, and making it possible to dispense with steam packed
valve stems.
In the accompanying Drawing Figure 1 is a vertical and longitudinal
section, and Figuro 2 and end view of the interior working parts of a
steam governor constructed in accordance with the first part of my In-
vention. Figure 3 is a transverse section taken on line Y, Y, of
Figure 2 to show the cylindrical form of the valve and valve arm, such
form however being merely preferable but not essential.
In the Drawing A denotes a hollow steam chamber, the same being
stationary and provided with a cover A'. The revolving parts of the
device are the shafts S, S¹, the hollow arms or conductors B, B, and the

page_text: sleeves or valves V, V, sliding on the arms B, B, the whole being driven
by the pulley P in the usual manner. The part S' of the shaft is hollow,
and of sufficient size for the required steam passage, and communicates
with the hollow arms B, B. The hollow arms are closed at their outer
ends, but have holes O, O, O, O, through them opening into the interior
of the chamber A, these holes being the valve ports of the governor.
The steam, in the direction as shown by the arrows on Figure 1, enters
the hollow shaft S' through a steam pipe supposed to be screwed into
the hub D of the cover A', thence into the hollow arms. or con-
ductors B, B, and through the ports O, O, O, O, into the interior of the
chamber A, from which it escapes by the eduction passage C in the base
flange of the machine.
Figure 2, as before stated, is a view of the interior parts (the cover A¹,
shown in Figure 1, being removed in order to show the same), The
valves V, V, are furnished with springs E, E, E, E, which are attached
to the valves and to the shaft S¹ in such a manner that the valves are
drawn inward by the springs toward the shaft. The valves V, V, arc of
suitable length, so that when drawn back to the shaft the ports (O) of
the arms or conductors B, B, are left entirely open, but when the
machine is running the centrifugal forco causes the valves to slide out-
ward on the arms and close the ports, cither partially or entirely,
according to the varying speed of the shaft.
In Figures 1 and 2 of the said Drawing the upper pair of ports aro
shown as entirely open, while the lower pair appear as partially closed
by the valve moving outwards.
It will be evident that a single hollow arm or conductor or any con-
venient number of such arms or conductors might be used instead of the
pair described, and also that the particular course of the steam indicatod
is not essential, as the same might with equal facility be made to enter
at C and pass out at D.
It will also be evident that the particular form of valves and springs
represented are not essential, as various other balanced valves might be
employed with like results without changing the character of my In-.
vention.
L
In Figures 4 and 5 I have represented a modified form of this part of
my Invention, Figure 4 denoting a central and vortical section, and
In this modified
Figure 5 a vertical and transverse section of the same.

page_text: form a single steam conductor or hollow drum, having a removable cover,
is employed in the steam chamber A, A', the same having two series of
holes or ports Ò, 0, 0, 0, disposed in the heads of the drum or con-
ductor and on opposito sides of the shaft, each pair of ports of such
drum having a valve V of an equal width with the interior of the drum.
Each of such valves is connected by means of a bar spring E with the
interior of the drum, such springs operating to draw the valves away
from the ports, and the valves being caused to close the port holes of the
conductor or drum by direct centrifugal action, and in accordance with
the speed of the machine as 'before.
In Figure 6 I have represented a central and vertical section of a
governor constructed in accordance with the second part of my In-
vention. In this Figuro A. denotes the steam chamber, and A' its
removable cover. S is the driving shaft, and P the pulley. D is tho
induction, and C the eduction port of the steam chamber. The eduction
port C has a stationary hollow arm or conductor B extending up into
the interior of the chamber A, such arm being closed at its upper end,
and having four or any other desirable number of ports (O), which open
into the interior of such chamber. V is a valve, which slides on the
said hollow arm, and is connected at its opposite sides 'to the ends of a
flat curved bow shaped spring E, which is suspended at its middle part,
and is at such point connected by means of a screw S with the driving
shaft. Attached to the inner face of the spring, on opposites sides
thereof and at right angles to its point of suspension, are two balls or
weights E, E, which when the shaft is rotated are caused by centrifugal
force to move outward, and thereby move the valve upward or over the
ports O, O, so as to close or partially close them in accordance with the
speed of the shaft.
Having described my Invention I would remark that I disclaim all
novelty in the form of the valves and valve ports when the same are
detached from other parts of the apparatus.
From the above it will be seen that by the arrangement of the centri-
fugal mechanism within the steam chamber of the governor I am
enabled to dispense with packed valve stems, jointed arms, etc., thereby
avoiding the consequent friction, and producing a governor of far greater
sensitivenesss than those of the ordinary construction..
What I claim as my Invention is as follows:-
First. The combination in a steam governor of a steam .chamber

page_text: baving induction and eduction ports, with a steam conductor or con-
ductors disposed within said chamber, and provided with steam ports
and valves arranged to close such ports by direct centrifugal action, sub-
stantially as set forth.
Second. In a governor for steam engines, etc., the combination of the
case A, A¹, provided with induction and eduction ports D, C, the driving
shaft S, S', provided with hollow arms or conductors B, B, having
ports O, O, the centrifugal valves V, V, and springs E, E, E, E, substan-
tially as shown and described.
Third. The combination of the centrifugal valves V, V, with the
hollow arms or conductors B, B, provided with ports O, O, and tho
casing A, A', substantially as shown and described.
Fourth. In a steam governor the arrangement of a centrifugal
mechanism within the steam chamber of the governor, substantially as
and for the purpose set forth.
In witness whereof, I, the said Daniel La Forest Chase, have
hereunto set my hand and seal, this Thirtieth day of March,
1875