A NEW AND USEFUL ENGINE GOVERNOR
Year: 1871

page_text: LETTERS PATENT to Stillman Boyd Allen, of the State of Massa-
chusetts, of the United States of America, for the Invention of "A
NEW AND USEFUL ENGINE GOVERNOR."-A Communication from Reuben
K Huntoon of the State aforesaid
COMPLETE SPECIFICATION filed by the said Stillman Boyd Allen at
the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 10th February 1871, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, STILLMAN
BOYD ALLEN, of the State of Massachusetts, of the United States of
America, send greeting.
WHEREAS I am in possession of an Invention of “A NEW AND
USEFUL ENGINE GOVERNOR," and have petitioned Her Majesty to grant
unto me, my executors, administrators, and assigns, Her Royal Letters
Patent for the same, and have made solemn Declaration that said
Invention was communicated to me by Reuben K, Huntoon, of the
State aforesaid.

page_text: NOW KNOW YE, that I, the said Stillman Boyd Allen, do hereby
declare that the following Complete Specification, under my hand and
seal, fully describes and ascertains the nature of the said Invention, and
in what manner the same is to be performed, in and by the following
statement, reference being had to the accompanying Drawing making
part of this Specification.
The nature of the said Invention consists in the combination of main
and auxiliary oblique winged propellers, a ribbed cylinder, and two
supporting shafts, with a close case to hold a liquid. Also, in the
governor case as made or provided with a hollow dome to aid in keeping
the case filled with the liquid and to receive the liquid during its
expansion in the hollow case. Also, in an engine governor as com-
posed of the following instrumentalities, arranged and combined with a
valve and its ease, such instrumentalities consisting not only of a closed
case (filled or to be filled with a liquid), one main oblique winged or
screw propeller, and one auxiliary oblique winged or screw propeller,
with their two separate shafts, and a hollow cylinder provided with ribs
on its internal surface and being open at its ends, and supported by the
wings of the auxiliary propeller, the said propellers and cylinder being
arranged within the case, or the liquid therein, but of a toothed pinion
or wheel, a toothed sector, and an arm and adjustable weight, all being
substantially as herein-after described.
Of the said Drawing Figure 1 is a front elevation of my Inven-
tion; Figure 2, a longitudinal section; and Figure 3 a transverse section
of it as applied to the valve of a conduit for supply of steam to
a steam engine. In such Drawings A denotes the hollow case, cylin-
drical in form, and surmounted by a dome B, opening into the case.
The purpose of such dome will be herein-after described. Extending
into the case at one end of it transversely and axially is a shaft C,
on which there is fixed inside of the case a screw propeller D,
or a series of oblique fan blades a, a, a, a, projected from a cylin-
drical hub b. A driving wheel or pulley E is fixed on the outer part
of the shaft. Encompassing the said propeller is a hollow cylinder F
which is open at its ends, and furnished on its interior periphery
with a series of ribs c arranged at equal distances asunder. Such
cylinder F is supported in position by a series of oblique blades or
flat arms d, d, d, which radiate from a common hub e arranged as
shown, and fixed upon another shaft f. This latter shaft extends

page_text: through the next adjacent end of the case A and is provided with a
pinion g fixed on that portion of the shaft which projects from the
case. There is a free space h between the auxiliary propeller or series
of blades d and the next adjacent side or head of the case A, and
there is also a similar space i between the blades of the main pro-
peller D and that head of the case which is next adjacent to such
propeller. Furthermore there is an annular space k surrounding the
hollow cylinder F and freely communicating with the spaces h, i, herein-
before named. Underneath the case A is a valve case K, which is
provided with induction and eduction openings m, n, and a hollow
cylindrical or conical valve G, all being as represented. The valve is
fixed on a shaft H that extends through one end of the case K, and
carries a wheel or what is better a toothed sector I to engage with the
pinion g. An arm p projecting from a ratchet wheel q that turns freely
on a journal r extending from the toothed sector in manner as shown,
carries an adjustable weight & provided with a set screw t for fixing
such weight to the arm. A pawl u pivoted to the sector engages with
the ratchet, all being as represented. A driving band or endless belt pro-
ceeding from some pulley of the steam engine is to pass around and give
motion to the pulley of the main propeller so as to set the latter in
revolution within the case, the said case being filled with a liquid
when the governor is in use. The action of the blades of the main pro-
peller on the liquid will not only force it tangentially against the ribs of
the auxiliary propeller but laterally against its blades thereby putting the
auxiliary propeller in revolution, and creating a circulation of the fluid
through both propellers and around the hollow cylinder F in or about
in the plane of its axis, all of which effects a very favorable action on
the auxiliary propeller, so as to cause it to operate to advantage, its
shaft and the valve actuating mechanism connected therewith. By pro-
ducing circulation of the fluid in a plane transverse to the case A instead
of in one at right angles with the axis of the case revolution of the
liquid in the direction of rotation of the parts within the case will be
more or less checked and as a consequence the power of the main
propeller to actuate the auxiliary one and its connections will be
enhanced. By means of the counterbalance weights and the arm p
the necessary leverage on the toothed sector to counteract to the requisite
degree the power of the main propeller to operate the auxiliary one
may be obtained.
The object of the hollow dome of the case A is to
enable the case to be kept full of the liquid and the latter to either

page_text: expand or contract under changes of temperature, or from other causes
also to operate to prevent the liquid. from revolving in the case in a
plane at right angles with the axis of such case. The shafts of the
two propellers are to be supported in stuffing boxes applied to the heads
of the case. The engine governor constructed as described is very
sensitive and efficient in operation.
I claim as my Invention the combination of the main and auxiliary
oblique winged propellers, the ribbed cylinder F, and their separate shafts,
with the case A to hold a liquid as described, all being substantially as
set forth.
I also claim the governor case as provided with the hollow dome to
receive the liquid during expansion of it in the case, and check its
revolution therein. I also claim the engine governor as composed of
the instrumentalities as described, arranged, and combined together,
and with the valve and its case as set forth, such consisting of the closed
case, the main and auxiliary oblique winged propellers, the ribbed hollow
cylinder F, the separate shafts of the propellers, the pinion, the toothed
sector, the arm, and counterbalance weight, all as explained.
In witness whereof, I have hereto set my signature and affixed my
seal, this Twenty-seventh day of January, A.D. 1871.
STILLMAN BOYD ALLEN. (L.S.)