A MEANS OF ADDING POWER TO THE STEAM ENGINE AND OTHER MACHINERY
Year: 1843

page_text: ELLIO
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
ELLIOTT, of 17, Tower Royal, in the City of London, Engineer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Eighteenth day of November, in the seventh of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Edward Elliott, my executors, administrators, and assigns, Her especial
licence, full power, sole privilege and authority, that I, the said Edward
Elliott, my executors, administrators, and assigns, or such others as I, the
said Edward Elliott, my executors, administrators, and assigns, should at
any time agree with, and no others, from time and at all times during the
term of years therein expressed, should and lawfully might make, use,
exercise, and vend, within that part of the United Kingdom of Great Britain
and Ireland called England, Her Dominion of Wales, and Town of Berwick-
upon-Tweed, and in the Islands of Jersey, Guernsey, Alderney, Sark, and
Man, and also in all Her said Majesty's Colonies and Plantations abroad, my
Invention of "A MEANS OF ADDING POWER TO THE STEAM ENGINE AND OTHER
MACHINERY;" in which said Letters Patent is contained a proviso obliging me,
the said Edward Elliot, by an instrument in writing, my hand and seal, par-
ticularly to describe and ascertain the nature of my said Invention, and in
what manner the same is to be performed, and to cause the same to be enrolled
in Her said Majesty's High Court of Chancery within six calendar months
next and immediately after the date of said in part recited Letters Patent, as
in and by the same, reference being thereto had, will more fully and at
large appear.

page_text: The machine I have chosen in this Specification to illustrate my Invention
is an ordinary cylinder steam engine, the piston of which carries a cross head
with two side rods, and the parts which relate more immediately to my Inven-
tion are tinted with blue and yellow colour.
Figures 1 and 2 represent a side elevation and end view of an engine with
my improved mechanism attached. A denotes a segment of a drum mounted on
the shaft B, which works in the plummer block C; on the end of the shaft B is
keyed the crank D, represented as broken off in Figure 1, so as not to obstruct
the view of the chain. F indicates an ordinary crank as generally used, which
is keyed on the shaft of the fly wheel G; the cranks D and F are united by
the connecting rod H. To the cross head I of the piston rod J, are fixed the
two connecting rods K, K, which are connected to the chain frame L. The
chains as shewn in the Drawing, have one extremity bolted to the frame L,
and the other to the drum A, thus producing, when the piston rod is in action,
a vibrating motion in the drum, and consequently in the crank D, which crank
D being longer than the crank F, causes the crank F to rotate under cir-
cumstances which assist it over the dead points.
Now, whereas it is evident that ropes or leather bands might be substituted
for the chains herein-before described, or a rack acting against a toothed
drum, as shewn at Figure 3, and that many other means may be used for
giving the reciprocating motion to the drum A; and whereas I do not confine
myself in the application of my mechanism to prime movers, such as steam
engines, water engines, &c. but it may be employed in all cases where right
line, vibrating, or reciprocating motion has to be converted into rotary motion;
and I claim as my Invention the combination of a drum and chains, or any
suitable substitutes for the same for giving reciprocating motion to the crank
D, with two cranks placed after the manner herein set forth, one of the said

page_text: cranks being longer than the other, so that only one of the same performs an
entire revolution, and whereby the crank F is helped over the dead points;
and such my Invention being, to the best of my knowledge and belief, entirely
new, and never before used within that part of Her said Majesty's United
Kingdom of Great Britain and Ireland called England, Her Dominion of
Wales, and Town of Berwick-upon-Tweed, nor in the Islands of Jersey,
Guernsey, Alderney, Sark, and Man, nor in any of Her said Majesty's Colonies
and Plantations abroad, I do hereby declare this to be my Specification of the
same, and I do verily believe that this my said Specification doth comply in all
respects, fully and without reserve or disguise, with the proviso in the said herein-
before in part recited Letters Patent contained; wherefore I claim to maintain
exclusive right and privilege to my said Invention.
In witness whereof, I have hereunto set my hand and seal, this Four-
teenth day of May, in the year of our Lord One thousand eight
hundred and forty four
Inrolled the Eighteenth day of May, in the year above written.