Year: 1897

page_text: Date of Application, 18th May, 1897-Accepted, 31st July, 1897
I, EDWIN DUNBAR BANGS, of No. 1522 Cedar Street, in the city and county of
Milwaukee, State of Wisconsin, United States of America, Manufacturer, 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 has for its main object to prevent racing of a propeller wheel
when the same comes out of water while in rotation, and further to automatically
reduce the steam supply to the engine, independent of the throttle, whenever the
propeller-wheel shaft attains a greater speed than what has been predetermined,
even though said wheel should not come out of the water, and to these ends the said
invention consists in certain peculiarities of construction and combination of parts
constituting a governor mechanism, all as hereinafter set forth with reference to
the accompanying drawings and subsequently claimed.
DESCRIPTION OF THE DRAWINGS:
Figure 1 represents a partly sectional view of a governor-mechanism constructed
according to my invention, and Figure 2, a view taken on the plane indicated by
line 2-2 in the preceding figure.
Referring by letter to the drawings A represents a suitable support for a base B,
and while this base is shewn adjustably secured to said support it may be otherwise
connected thereto. The base is provided with a hanger b that extends through the
support A, and a horizontal spindle C, having its bearing in the hanger, carries a
pulley c for a belt D that also runs on another pulley E fast on the shaft F for a
propeller-wheel. The spindle C also carries a bevel-pinion G in mesh with a
similar pinion H fast to a governor-shaft I that turns in a bearing d constituting
part of the base B on the aforesaid support.
Splined on the shaft I is the usual sliding sleeve J connected by links e with
ball carrying arms K in pivotal connection with a cross-head f on said
shaft. Each of the governor-balls L is shown provided with a wing 7, and a
pivotal latch-bar M is held up by a spring h to come in the path of the wings when
said balls are lifted to a predetermined elevation. In order that the ball-wings
may operate upon the latch-bar at a greater or less elevation, any suitable provision
may be made to vary the set of said bar, and as herein shown the base B may be
adjusted on its support, but this operation necessitates a corresponding adjustment
of the belt-pulley E on the propeller-wheel shaft, and therefore I have also shown
the aforesaid bar pivoted in a bracket N adjustable on a flange-extension i of the
base-support. This bracket has an arm ; connected to the latch-bar M by the
spring h, and a screw-stop k may be arranged in said bracket for the purpose of
obtaining a fine axial adjustment of said bar.
The latch-shoulder m on bar M serves as a support for a lever P connected by a

page_text: link P to a casting Q of a gate-valve R that controls the passage of steam through
a pipe S, employed in practice to connect a boiler with the engine by which the
propeller-wheel shaft is driven, and the valve has a stem n in pivotal connection
with the lever. A weight T is suspended from the lever and a cord p, or its
equivalent, run over suspension pulleys 7, connects said lever with a drum U having
its arbor V arranged in bearings r on the base B above specified. A hand-cords,
or its equivalent, may be joined to the one p and suspended by pulley as herein
shown. Fast on the drum-arbor V is a bevel-pinion W, and a similar pinion X
on the governor-sleeve comes in and out of mesh therewith. Arranged on the
arbor Vintermediate of the pinion W and a washer u, adjacent to one of the
bearings r, is a spiral spring and hence while said pinion is normally held in
position to mesh with the one X provision is had for longitudinal yield of said
arbor to automatically effect a disengagement of said pinions should the governor-
sleeve J not lift at the time the valve-lever P is brought to normal position by the
winding of cord p on the drum U, above specified.
In practice, when the speed of the shaft F increases, incidental to the propeller-
wheel coming out of water, the governor-balls L will lift and thus bring their
wings in position to push back the latch-bar M thus releasing the weighted
lever P whereby the valve R is run down to check the steam-supply from boiler
to engine, it being preferable to notch said valve, as herein shown, so as to permit
the passage of enough steam to keep said engine running. The steam-supply
having been checked and the speed of said shaft decreased, the governor-sleeve
pinion X will by gravity engage the arbor-pinion W, and thereby cause a wind of
the cord p to automatically bring the valve and its lever into normal position, as
shown in Fig. 1, or the same result may be obtained by an operation of the hand-
cords, the latch-shoulder m of bar M coming under said lever to support the same.
From the foregoing it will be understood that the reduction of steam supply to
the engine is always automatic and independent of the throttle, the operation
taking place whenever the propeller-wheel shaft attains a speed greater than what
has been predetermined, even though said wheel should not come out of the water.
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 combination of a propeller-wheel shaft, a speed-governor geared to the
shaft, a steam-supply pipe for the shaft-driving engine, a gate-valve for the pipe,
a weighted valve-lever, a supporting latch for the lever arranged to be retracted
by action of the governor-bails, a winding-drum having its arbor provided with a
pinion, another pinion carried by the governor-sleeve to come in and out of mesh
with the one aforesaid, and a suitably suspended flexible connection between said
valve-lever and drum.
2. The combination of a propeller-wheel shaft, a speed-governor geared to the
shaft, a steam-supply pipe for the shaft-driving engine, a gate-valve for the pipe,
a weighted valve-lever, a supporting latch for the lever arranged to be retracted
by action of the governor-balls, a winding-drum having the arbor thereof arranged
to have longitudinal play in its bearings, a pinion on the arbor, another pinion
carried by the governor-sleeve to come in and out of mesh with the one aforesaid,
a spiral-spring arranged intermediate of an arbor bearing and the arbor-pinion,
and a suitably suspended flexible connection between said valve-lever and
winding-drum.
3. The combination of a propeller-wheel shaft, a speed-governor geared to the
shaft, a steam-supply pipe for the shaft-driving engine, a gate-valve for the pipe,
a weighted valve-lever, a supporting latch for the lever arranged to be retracted
by action of the governor-balls, a winding-drum co-operative with the governor-
sleeve, a suitably supported flexible connection between said lever and drum, and
a suitably supported hand-cord, or its equivalent joined to said flexible connection.
4. The combination of a propeller-wheel shaft, a speed-governor geared to the

page_text: shaft, a steam supply-pipe for the shaft-driving engine, a partial cut-off gate-valve
for the pipe, a weighted valve-lever, a supporting latch for the lever arranged to
be retracted by action of the governor-balls, and suitable mechanism co-operative
with the governor-sleeve to effect automatic lift of the valve.
101 1
1007
EDWIN DUNBAR BANGS.