Iм- PROVEMENTS IN GOVERNORS FOR MARINE ENGINES
Year: 1874

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields,
in the County of Middlesex, Gentleman, for the Invention of "Iм-
PROVEMENTS IN GOVERNORS FOR MARINE ENGINES."-A communication
from abroad by Caldwell Culberson Jenkins, of Philadelphia, and
Charles Barrington Lee, of Westchester, Chester County, both in
PROVISIONAL SPECIFICATION left by the said John Henry Johnson
at the Office of the Commissioners of Patents, with his Petition,
on the 17th September 1874.
1, JOHN HENRY JOHNSON, of No. 47, Lincoln's Inn Fields, in the
County of Middlesex, Gentleman, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN GOVERNORS FOR MARINE ENGINES," a com-
munication to me from abroad by Caldwell Culberson Jenkins, of
Philadelphia, and Charles Barrington Lee, of Westchester, Chester

page_text: County, both in the State of Pennsylvania, United States of America,
to be as follows:-
The object of this Invention is the application to marine engines of a
ball governor, and further, the ready adjustment of the governor when
circumstances demand such adjustment.
The spindle which may be adapted to any suitable form of ball
governor, but which in the present instance carries the governor for
which Letters Patent were granted to George Davies on the 21st of
August 1862, No. 2337, is driven directly from the propeller shaft of the
engine by a belt, and revolves with the same governor in bearings on
suitable standards secured to a base plate. On this spindle works the
sliding sleeve of the governor, to which sleeve motion is communicated
by the action of the balls in motion.
The throttle valve chest of the steam engine or engines in the present
instance is situated on a pillar secured to and communicating with the
steam chest of the engine. A horizontal rock shaft is adapted to suitable
bearings, one of which is secured to the said base plate, the other being
´at any fixed point on the engine.
The throttle valve spindle has an arm connected by a rod to an arm
on the rock shaft, to which is secured another arm, the latter being con- 2
nected by a rod to one arm of a lever, the other arm of which embraces
and is connected to a loose collar on the above mentioned sliding sleeve
of the governor.
Marine engines differ to such an extent in their construction and in
their arrangement within the holds of the vessel that the positions of 2
the governors must also be varied, the position of the governor in the
engine room in respect to the steam chest and throttle valve depending
upon such convenient localities as may present themselves.
By the employment of the intermediate or countershaft the adjust-
ment of the entire governor from or towards the throttle valve is much 3
facilitated, the simple lengthening or shortening of the shaft without
any alteration of other parts of the mechanism in most cases sufficing to
insure the attachment of the base plate of the governor in some
permanent and convenient position in the engine room.
It is important in connection with marine engine governors that these 3
instruments should admit of such ready alteration in their action as
circumstances may suggest to the experienced engineer.

page_text: In order to afford facilities for quickly altering or adjusting the action
of the governor we secure to the countershaft a third arm having a
counterbalance weight which can be readily adjusted to any desired
position on the said arm and secured after adjustment by a set screw,
the effect of the governor on the throttle valve being more or less
dependent on the position of this weight.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HENRY JOHNSON, of 47, Lincolns' Inn Fields, in the County of Middlesex,
Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of September, in the
year of our Lord One thousand eight hundred and seventy-four, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John Henry Johnson, Her
special license that I, the said John Henry Johnson, my executors;
administrators, and assigns, or such others as I, the said John Henry
Johnson, my executors, administrators, or 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, use, exercise, and vend, within the United Kingdom of
Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "IMPROVEMENTS IN GOVERNORS FOR MARINE ENGINES," a com-
munication to me from abroad by Caldwell Culberson Jenkins, of
Philadelphia, and Charles Barrington Lee, of Westchester, Chester
County, both in the State of Pennsylvania, United States of America,
upon the condition (amongst others) that I, the said John Henry
Johnson, my executors or administrators; by an instrument in writing
under my hand and seal, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent

page_text: Office within six calender months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said John Henry Johnson, 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 t
in and by the following statement, reference being had to the accom-
panying Drawings, and to the letters and figures marked thereon, that
is to say:-
-
The said Invention has for its object the application to marine engines
of a ball governor, by preference of the description for which Letters 1
Patent were granted to George Davies, August Twenty-first, One thousand
eight hundred and sixty-two, No. 2337, and also the ready adjustment
of the governor when circumstances demand such adjustment, which
objects are attained in the manner herein-after described!
And in order that the said Invention may be fully understood, I shall 1
now proceed more particularly to describe the same, and for that purpose
shall refer to the several Figures on the annexed Sheet of Drawings, the
same letters of reference indicating corresponding parts in both the
Figures.
Figure 1 is a plan of the governor, throttle valve, and connections; 2
and Figure 2 a side view of the same.
A is the spindle carrying in the present instance the governor, for
which Letters Patent were granted to George Davies, No. 2337, 1862,
as aforesaid. The said governor being so fully-described in the Specifi-
cation of the said Patent it will only be necessary to refer to the sliding
sleeve a to which motion is communicated by the action of the balls
in motion. The governor spindle is driven directly from the propeller
shaft B by a belt D, and revolves in bearings on suitable standards b, b¹,
and d, secured to a plate H.
2
J is the chest of the throttle valve of the steam engine or engines, 3
this chest being in the present instance situated on a pillar K secured to
and communicating with the steam chest of the engine. A rock shaft M
is adapted to suitable bearings, one of which e is secured to the plate H,
the other being at any fixed point on the engine.
The throttle valve spindle N has an arm ƒ connected by a rod / to an 3

page_text: arm i on the rock shaft. M, to which is secured another arm j, the latter
being connected by a rod k to one arm of a lever P; the other arm of
which embraces and is connected to a loose collar on the above.
mentioned sliding sleeve a of the governor.
: :
Marine engines differ to such an extent in their construction and in
their arrangement within the holds of the vessel that the positions of the
governors must also be varied, the position of the governor in the engine
room in respect to the steam chest and throttle valve depending upon
such convenient localities as may present themselves..
By the employment of the intermediate or countershaft M the adjust-
ment of the entire governor from or towards the throttle valve is greatly.
facilitated, the simple lengthening or shortening of the shaft without any
alteration of other parts of the mechanism in most cases sufficing to
insure the attachment of the base H of the governor in some permanent
and convenient position in the engine room."
It is important in the case of marine engine governors that these
instruments should admit of such ready alteration in their action as
circumstances may suggest to the experienced engineer.
In order to afford facilities for quickly altering or adjusting the action
of the governor, according to this Invention, there is secured to the
countershaft M an arm T having a weight W which is capable of being
readily adjusted to any desired position on the arm, and secured after
adjustment by a set screw v, the effect of the governor on the throttle
valve being more or less dependent on the position of this weight.
.
Having now described and particularly ascertained the nature of the
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that what I consider to
be novel and original and therefore claim as the Invention secured to
me by the herein-before in part recited Letters Patent is,―-
First. The combination of the countershaft M with the throttle valve
of a marine engine and with the sliding sleeve of a governor, and with
intermediate mechanism, whereby the motion of the said sleeve is trans-
mitted to the valve through the said countershaft, all substantially as
herein-before described and illustrated by the accompanying Drawings.

page_text: Second. The countershaft M of a marine governor in combination
with the arm T and sliding weight W, substantially as herein-before
described and illustrated by the accompanying Drawings.
In witness whereof, I, the said John Henry Johnson, have to this
my Specification set my hand and seal, this Twelfth day of 5
March, One thousand eight hundred and seventy-five.
J. HENRY JOHNSON. (L.S.)