AN IMPROVED REGULATOR OR GOVERNOR FOR STEAM PROVISIONAL SPECIFICATION
Year: 1868

page_text: LETTERS PATENT to Francis Wirth, of the Firm of Wirth and
Company, Patent Agents, Frankfort-on-the-Maine, Germany, for
the Invention of "AN IMPROVED REGULATOR OR GOVERNOR FOR STEAM
PROVISIONAL SPECIFICATION left by the said Francis Wirth at
the Office of the Commissioners of Patents, with his Petition, on
the 26th May 1868.
I, FRANCIS WIRTH, of the Firm of Wirth and Company, Patent
Agents, Frankfort-on-the-Maine, Germany, do hereby declare the nature
of the said Invention for "AN IMPROVED REGULATOR OR GOVERNOR FOR
STEAM AND OTHER ENGINES," a communication, to be as follows:-
This regulator is based on the following principle:-Suppose an axis
is put in rotation by a pair of wheels, the power which causes the
rotation acts in two directions, first, it turns the axis; secondly, it tends
to move the axis in the direction of the rotation.
The whole mechanism is mounted upon a column, which is provided
at its upper end with a plate; this plate supports two small bearings.

page_text: At one side of the column is another plate, provided with an arm
which also supports two bearings. These bearings have all a common
centre line, and the two outer bearings have journal boxes of brass.
In the two inner bearings a lever moves provided with screws at its
ends. On these screws are moveable counterweights.
On starting the machine the great wheel of the regulator is moved,
causing a vane also to rotate, but owing to the resistance of the air
part of the power tends to displace the axis of the said vane and of
course also the lever (to which it is attached) by raising it. To regulate
the motion of this lever at the end of the same a bar is connected
which at the raising or lowering of the said lever moves a float. This
float is immersed in water so that air can either pass through the small
cock on the cover or be sucked in. This arrangement prevents too
great sensibility of the regulator. The charged engine is now regulated
by hand to its nominal velocity and the counterweights so fixed that
the lever is horizontal; another lever is then connected with the
throttle valve. This is the normal position of the regulator. Suppose
that the velocity of the engine is by any cause increased, then the
pressure is greater on the teeth of the two wheels and the equilibrium
is interupted, the larger part of the power displaces the axis, raising
therefore the screwed lever which works by the other lever upon the
throttle valve and so regulates the engine. If the velocity of the
engine is diminished, the equilibrium is also disturbed and the lever
works upon the throttle valve the other way.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Francis Wirth in the Great Seal Patent
Office on the 26th November 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FRANCIS
WIRTH, of the Firm of Wirth and Company, Patent Agents, Frankfort-
on-the-Maine, Germany, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of May, in the year of
our Lord One thousand eight hundred and sixty-eight, in the thirty-first
year of Her reign, did, for Herself, Her heirs and successors, give

page_text: and grant unto me, the said Francis Wirth, Her special licence
that I, the said Francis Wirth, my executors, administrators, and
assigns, or such others as I, the said Francis Wirth, my executors,
administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, usc, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention of "AN IMPROVED REGULATOR OR
GOVERNOR FOR STEAM AND OTHER ENGINES," upon the condition (amongst
others) that I, the said Francis Wirth, my executors or administrators,
by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be per-
formed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Francis Wirth, do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in
and by the following statement, reference being had to the accompanying
Drawings forming a part of this Specification :-
This regulator is based on the following principle:-Suppose an
axis is put in rotation by a pair of wheels, the power which causes the
rotation acts in two directions, first, it turns the axis; secondly, it tends
to move the axis in the direction of the rotation.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan of my improved regulator; Figure 2 is a side
elevation of the same; Figure 3 is a section on the line A, B, Figure 1;
Figure 4 shows a detached portion drawn to a reduced scale.
The whole mechanism is mounted upon a column A provided at its
upper end with a plate B which, supports two small bearings C, D. At
one side of the column is another plate provided with an arm E which
also supports two bearings F, G. These bearings have all a common
centre line, and the two outer bearings C, G, have journal boxes of
brass. In the two inner bearings D, F, a lever I moves provided
at its ends with screws J. On these screws are movable counter-
weights K.

page_text: On starting the machine the great wheel M. of the regulator is moved
in the direction of the arrow and through the wheel or pinion on the
axis N causes the vane O to rotate, but owing to the resistance of the
air part of the power tends to displace the axis N of the said vane, and
consequently also the lever I to which it is attached by raising it. To
regulate the motion of this lever I a bar S is connected to the end of
the same, which at the raising or lowering of the said lever moves a
float T which is immersed in water so that air can either pass through
the small cock on the cover or be sucked in. This arrangement prevents
too great sensibility of the regulator. The charged engine is now
regulated by hand to its nominal velocity, and the counterweights K so
fixed that the lever I is horizontal; another lever P is then connected
with the throttle valve. This is the normal position of the regulator.
Suppose that the velocity of the engine is by any cause increased then
the pressure is greater on the teeth of the two wheels and the equilibrium
is interrupted, the larger part of the power displaces the axis N, raising
therefore the lever I which works by the other lever P upon the throttle
valve, and so regulates the engine. If the velocity of the engine is
diminished the equilibrium is also disturbed and the lever I works upon
the throttle valve the other way.
Having thus described my said Invention, I claim,-
First. The wheel M and axis N supported by the rocking lever I,
substantially as described.
Second. The vane O connected with the wheel on the axis N and the
lever I, substantially as described.
Third. The lever P connected with the lever I, substantially as
described.
Fourth. The bar S and float T connected with the lever I, substantially
as described.
In witness whereof, I, the said Francis Wirth, have hereunto set my
hand and seal, this Twentieth day of November, in the year of our
Lord One thousand cight hundred and sixty-eight.
FRANCIS WIRTH. (L.S.)