AN IMPROVED ROTARY MOTION OR ENGINE TO COMMUNICATE POWER TO MACHINES
Year: 1806

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
LESTER, of Piccadilly, in the County of Middlesex, Engineer, send greeting.
WHEREAS His most Excellent Majesty King George the Third, in and
by His Letters Patent under His Great Seal of the United Kingdom of
Great Britain and Ireland, bearing date at Westminster, the Nineteenth
day of June, in the forty-sixth year of His reign, for Himself, His heirs
and successors, did give and grant unto me, the said William Lester, my
executors, administrators, and assigns, His especial licence, full power, sole
priviledge and authority, that I, the said William Lester, my executors,
administrators, and assigns, and every of them, by myself and themselves, or
by my and their deputy or deputies, servants or agents, or such others as I,
the said William Lester, my executors, administrators, or assigns, should at
any time agree with, and no others, from time to time and at all times there-
after, during the term of years therein expressed, should and lawfully might
make, use, exercise, and vend, within that part of His said Majesty's United
Kingdom called England, His Dominion of Wales, and Town of Berwick-
upon-Tweed, my Invention of "AN IMPROVED ROTARY MOTION OR ENGINE TO
COMMUNICATE POWER TO MACHINES;" in which said Letters Patent there is con-
tained a proviso obliging me, the said William Lester, by an instrument in
writing under my hand and seal, particularly to describe and ascertain the
nature of my said Invention, and in what manner the same is to be per-
formed, and to cause the same to be inrolled in His said Majesty's High
Court of Chancery within four calendar months next and immediately after

page_text: the date of the said in part recited Letters Patent, as in and by the same,
relation being thereunto had, may more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
William Lester, do hereby declare that my said Invention is fully described
and ascertained by the following description, and the Drawings hereto
attached:-
Plate the 1st.-A, A, the shafts or levers to which the horses or oxen aro
yoked; B, B, cast-iron sockets in which the levers are fixed, in the center of
which is a female screw, Figure 8, into which the male screw E works, which
prevents the shafts dragging the horses forward when they stop suddenly,
when it is attached to a machine that has great velocity. D, a cylinder of
cast iron bolted to B, which is bored to receive the screw E, and turned to
work in the cylinder C, C, which is also made of cast iron and bored, to which
the step 10 is bolted to receive the toe of the screw E; F, F, a horned wheel
made of cast iron, round which the rope or chain G works, also round the
horned pinion H, which is cast on the back of the bevel wheel to give the
vertical motion J; I, a cast-iron chair fixed upon the portable tripod L;
K, a horned wheel working vertically, round which the rope O works, also
round a horned pinion which is fixed upon the machine to which the power
is communicated; L, L, portable tripods which expand and contract to
raise or lower the engine to the size of the horse, also to contract into less
space to facilitate its removal from place to place; M, M, six gages of iron to
prevent the legs of the tripods from flying out; N, N, a beam of timber
to keep the rope or chain tight, which is regulated by the holes 6, 6;
1, 2, the coupling brasses which fit in the chair I; 3, 3, 3, 3, handles to lift
about the tripods; 4, 4, 4, 4, 4, 4, iron spikes to prevent the tripods slipping;
5, 5, 5, 5, bolts to which the legs are fastened to the chairs, and must be
slackened when the engine is took down for removal, and screwed tight before
it is put to work; 7, 7, 7, 7, bolts that fasten the levers.
Plate the 2d. A, A, the shafts; D, a cylinder to receive the screw shaft
as above, but cut off at 8, and cast hollow to receive the clutch end of the
axis T; K, K, horned wheels which carry the rope or chain O, one of which
is fixed on the machine to which the power is communicated, and are varied
in size in proportion to the velocity required; P, P, a cast-iron chair bolted
to the beam of timber Q, Q; R, a foot that supports the screw shaft, the
steel toe of which turns in the chair S, S; V, the tumbling shaft, on the end
of which is fixed the clutch X, which greatly facilitate the hanging the
wheels K, K; 7, 7, bolts that fasten the shafts A, A, in the boxes B, B.
'The screw E working in the box D, which is bolted to B, B, prevents the

page_text: horses from receiving any injury by stopping suddenly, as the instant the
mpelling power ceases, the shafts A, A, are at rest.
In witness whereof, I, the said William Lester, have hercunto set my
hand and seal, the Eighteenth day of October, in the forty-sixth year
of the reign of our Sovereign Lord George the Third, by the Grace
of God of the United Kingdom of Great Britain and Ireland King,
Defender of the Faith, and in the year of our Lord One thousand
eight hundred and six.