A CERTAIN IMPROVEMENT OR IMPROVEMENTS ON STEAM ENGINES, BY WHICH MEANS POWER WILL BE GAINED AND EXPENCE SAVED
Year: 1824

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
VAUGHAN, of Sheffield, in the County of York, Gentleman, send greeting.
WHEREAS His present most Excellent Majesty King George the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the First day of May, in the fifth year of His reign, and in the
year of our Lord One thousand eight hundred and twenty-four, did, for
Himself, His heirs and successors, give and grant unto me, the said George
Vaughan, my exors, admors, and assigns, His said Majesty's especial licence,
full power, sole privilege and authority, that I, the said George Vaughan, my
exors, admors, and assigns, and my or their deputy or deputies, servants or
agents, or such others as I, the said George Vaughan, my exors, admors, and
assigns, should at any time agree with, and no others, might make, use,
exercise, and vend my Invention of "A CERTAIN IMPROVEMENT OR IMPROVEMENTS
ON STEAM ENGINES, BY WHICH MEANS POWER WILL BE GAINED AND EXPENCE SAVED,"
within England, Wales, and the Town of Berwick-upon-Tweed, and to have
and enjoy the whole profit and advantage arising by reason of the said
Invention during the term therein mentioned; which said Letters Patent
also contain a proviso obliging me, the said George Vaughan, to parti-
cularly describe and ascertain the nature of my said Invention, and in what
manner the same is to be performed, by an instrument in writing under my
hand and seal, and cause the same to be enrolled in His Majesty's High

page_text: Court of Chancery within six calendar months after the date or
Letters Patent.
the said
NOW KNOW YE, that in fulfilment of the said proviso, I, the said
George Vaughan, have executed this instrument, by which I do declare that
my improvement or improvements on steam engines is described and ascer-
tained in the following manner :-
In the plan hereunto annexed, Figure 1 represents a section of a cylinder
constructed according to my improvement or improvements. Figure 2 repre-
sents the same cylinder as forming part of an engine, of which only so much is
displayed as is necessary to shew its situation.
In Figure 1, A, A, A, A, is the cast cylinder, open at both ends, bored
true; B, B, a partition in the middle of the cylinder A, which may be either
cast in or bolted in afterwards; C, C, C, C, &c., is a casing cast round the
cylinder A, with a flange at the top and at the bottom, and a flange x, x, a
little below the middle to fix the cylinder in its place, which casing is for the
purpose of heating the cylinder, and keeping it hot in the usual way; two sido
rods D, D, &c., work through F, F, which are two copper or other metal
pipes fixed between the casing and cylinder, which pipes are riveted to the
top and bottom flange of the cylinder; E, E, are two cross bars connected to
the side rods at both ends, and also to the top and bottoin rods of the pistons;
the top piston is represented in the Figure nearly at the top of the cylinder; the
piston rod is connected to the cross bar by a socket in such bar, which bar is
suspended in the links to the paralel motion, as shewn in the Drawing,
Figure 2. G, G, G, G, are the two pistons and rods above alluded to, which,
when connected with the cross bars E, E, move together, producing what I call
one stroke with the two pistons. H is a cock and funnell, conveying, through
the casing and the cylinder, grease to the bottom piston. Close to the
partition B, in cylinder I, is a cock at the bottom of the casing to let out in
the usual manner the condensed steam from between the casing and cylinder.
K is the cock and pipe to convey steam from the steam pipe into the casing of
the cylinder. L, L, represent two passages, which are cast in a branch
proceeding from the cylinder and casing, the one passage communicating
above the partition B, and the other below, to convey steam in and out from
under the top and above the bottom pistons. M is a passage to convey steam
from under the slide valve into the condensor cast in the same branch in the
usual way. N is the slide valve inclosed in the steam box, having tho steam
pipe O connected with such box. The slide or other valve may be moved in
any of the known methods employed for that purpose.

page_text: The application of this cylinder to steam engines generally will be obvious
to persons acquainted with the construction of steam engines.
In witness whereof, I, the said George Vaughan, have hereunto set my
hand and seal, the Twenty-fifth day of October, One thousand eight
hundred and twenty-four.