IMPROVEMENTS IN MACHINERY FOR REGULATING THE SPEED OF MOTIVE-POWER ENGINES
Year: 1868

page_text: LETTERS PATENT to Moses Savery Maynard and Robert Grime, both
of Preston, in the County of Lancaster, Cotton Spinners, for the
Invention of "IMPROVEMENTS IN MACHINERY FOR REGULATING THE SPEED
OF MOTIVE-POWER ENGINES."
Scaled the 11th June 1869, and dated the 19th December 1868.
PROVISIONAL SPECIFICATION left by the said Moses Savery Maynard
and Robert Grime at the Office of the Commissioners of Patents,
with their Petition, on the 19th December 1868.
We, MOSES SAVERY MAYNARD and ROBERT GRIME, both of Preston,
in the County of Lancaster, Cotton Spinners, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN MACHINERY FOR REGU-
LATING THE SPEED OF MOTIVE-POWER ENGINES," to be as follows:-
Our Invention consists in combining the actions of two governors, one
of which becomes stationary only at the required speed, but continually
changes its position so long as that speed is deviated from, and is there-
fore commonly called an isochronal governor, and the other takes a

page_text: definite position corresponding to and depending on the rate of speed,
a type of which is to be found in the ordinary ball governor.
One arrangement of parts for performing our Invention consists of
a lever, one part of which is attached to or otherwise connected with
the throttle or other valve or starting gear. A second part of the same
lever is similarly connected with the first-named or isochronal governor,
and the third part of the lever is also similarly connected with the last-
named or ordinary ball governor. By this means the throttle or other
valve or starting gear partakes of the joint motion of both these
governors, thereby securing a better governing action.
A second arrangement consists of a weight placed upon a horizontal
lever attached to the rocking shaft connected with the ordinary governor,
this weight being made to slide or change its position upon the horizontal
lever by the action of the isochronal governor, thus assisting the ordinary
ball governor to rise or fall, and so move the throttle or other valve or
starting gear as may be required.
The above arrangements may be modified without departing from the
peculiar character of our Invention, as described in the first paragraph.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Moses Savery Maynard and Robert Grime in 2
the Great Seal Patent Office on the 18th June 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, MOSES
SAVERY MAYNARD and ROBERT GRIME, both of Preston, in the County
of Lancaster, Cotton Spinners, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of December, in the
year of our Lord One thousand eight hundred and sixty-eight, in the
thirty-second year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto us, the said Moses Savery Maynard
and Robert Grime, Her special license that we, the said Moses
Savery Maynard and Robert Grime, our executors, administrators, and
assigns, or such others as we, the said Moses Savery Maynard and
Robert Grime, our executors, administrators, and assigns, should at

page_text: 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 Inven-
tion for "IMPROVEMENTS IN MACHINERY FOR REGULATING THE SPEED OF MOTIVE-
POWER ENGINES," upon the condition (amongst others) that we, the said
Moses. Savery Maynard and Robert Grime, our executors or adminis-
trators, by an instrument in writing under our, or their, or one of our
or their hands and seals, 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 Office
within six calendar months next and immediately after the date of; the
said Letters Patent.
NOW KNOW YE, that we, the said Moses Savery Maynard and
Robert Grime, do hereby declare the nature of our said Invention,
and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement (that is to,
say):-
Our Invention consists in combining the actions of two governors,.
one of which becomes stationary only at the required speed, but con-
tinually changes its position so long as that speed is deviated from and.
is therefore commonly called an isochronal governor,, and the other
takes a definite position corresponding to and depending on the rate-
of speed, a type of which is to be found in the ordinary ball governor.
One arrangement of parts for performing our Invention consists of a
lever hereafter described as the "combination lever," one part of which
is attached to or otherwise connected with the throttle or other valve.
or starting gear. A second part of the said lever is similarly connected.
with the first-named or isochronal governor, and the third part of the
said lever is also similarly connected with the last named or ordinary
ball governor. By this means the throttle or other valve or starting
gear partakes of the joint motion of both these governors, thereby
securing a better governing action.
A second arrangement consists of a weight placed upon a horizontal
lever attached to the rocking shaft connected with the ordinary governor,
this weight being made to slide or change its position upon the horizontal:
lever by the action of the isochronal governor, thus assisting the balls:

page_text: of the ordinary ball governor to rise or fall, and so move the throttle or
other valve or starting gear as may be required.
And in order that our Invention -may be fully understood we will
proceed to describe the accompanying Sheet of Drawings.
Figure 1 shows an arrangement of machinery for combining the action
of two governors with a throttle or other valve.
A is the combination lever working on a stud projecting from the
valve lever B; the end A¹ of the combination lever A is connected by
the link or rod C, with the isochronal governor D, this isochronal
governor being fully described in the Specification of Letters Patent
granted to us on the Twenty-second day of April, One thousand eight
hundred and sixty-eight, No. 1302, but an isochronal governor of any
other description may be used, the other end A2 of the said combination
lever A. being similarly connected by the link or rod E with the ordinary
ball governor F or any governor acting in the same or in a similar
manner.
From the foregoing description and Drawing it is evident that the
valve lever B is influenced by the combined action of the two governors
D and F, and consequently if both governors act in unison the valve
lever will be either raised or lowered accordingly; also that if the
governors act to an equal amount in opposite directions no motion is
communicated to the valve lever, but that a slight motion is given to
the valve lever when the governors act in opposite directions, and one
governor operates in excess of the other.
Figure 2 represents a modification of our Invention. In this arrange-
ment A is the combination lever, one end of which works on a stud
projecting from the valve lever B. The combination lever is connected
with the two governors by the rods C and E at the positions marked A¹
and A respectively.
Figure 3 represents another modification of our Invention. This
arrangement is very similar to that shewn in Figure 2, but in this
case the combination lever A is placed over or to one side of the
valve lever B.
In all the above arrangements the combination lever A is shewn and
described as acting upon the lever of the throttle or other valve; but
we wish it to be understood that it may be made to act on the starting

page_text: gear of the engine to be governed. We would also remark that although
we have shewn in the Drawing the combination of an isochronal and a
ball governor, any two governors of the descriptions referred to in
describing the nature of our Invention, may be combined to act in a
similar manner.
The above arrangements are simple and readily described, but we do
not confine ourselves to these nor to any other particular arrangement or
position of the various parts so long as two governors and the throttle
or other valve or starting gear are connected by any levers, wheels, or
pulleys, so arranged as to cause cach of the two governors to act as
fulcrum to the other; the action and effect of this combination lever
being determined by the movements of the two governors D and F it
is evident that the throttle or other valve or starting gear must partake
of the joint action of both.
Figure 4 represents another of our improvements in machinery for
regulating the speed of motive-power engines. In this arrangement
the lever of the isochronal governor D is connected by the rod C to
the elbow lever G, the vertical arm of which is connected by the rod H
to the weight I, which is capable of sliding freely on the lever J fixed
to a rocking shaft to which the short lever K is fixed or otherwise con-
nected by the rod E' to the ball governor F. The outer end of the
lever J is connected by the rod E to the lever B of the throttle valve or
starting gear, the action and effect of this arrangement being that the
isochronal governor causes the weight I to slide upon the lever J con-
nected to the ball governor, so as to assist the balls of the said governor
to expand or contract as required, and thereby giving them increased
power to act quickly and to maintain a more uniform rate of speed.
Having thus stated the nature of our Invention, and described several
modes of carrying the same into operation, we wish it to be understood
that we do not intend to limit ourselves to the details given; but that
we claim,―
First. The combining the action of two governors of different descrip-
tions by the aid of a lever or levers, wheels, or pulleys, so arranged that
the valve or starting gear is attached to one part, the isochronal governor
to a second part, and the ball or any governor acting in a similar
manner to the third part of the said lever or levers, wheels, or pulleys,
as described in reference to Figures 1, 2, and 3.

page_text: Secondly. The using the isochronal governor to assist the ball governor
by moving a sliding weight on a lever connected to the ball governor, as
described and shewn in Figure 4.
In witness whereof, we, the said Moses Savery Maynard and
Robert Grime, have hereto set our hands and seals, this Sixteenth
day of June, One thousand eight hundred and sixty-nine.
MOSES SAVERY MAYNARD. (L.S.)
ROBERT GRIME.
(L.S.).