AN IMPROVE- MENT IN CRANES
Year: 1856

page_text: LETTERS. PATENT to Richard Archibald Broomán, of 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of "AN IMPROVE-
MENT IN CRANES" A communication from Camille Raymond Nenstadt.
Sealed the 24th October 1856, and dated the 9th May 1856.
PROVISIONAL SPECIFICATION left by the said Richard Archibald
Brooman at the Office of the Commissioners of Patents, with his
Petition, on the 9th May 1856.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for "AN IMPROVEMENT IN CRANES," (communicated to me by Camille Raymond,
Neustadt, a foreigner residing abroad,) to be as follows:-
This Invention consists in substituting for the drum.and. chain ordinarily
employed in cranes, a pitch chain and. chain wheel, with a case or guide for
causing the chain to gear into the wheel. The Inventor proposes to employ.
the chain wheel and pitch chain with every description of crane, whether
stationary or moveable.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 8th November 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Ninth day of May, in the year of our Lord One
thousand eight hundred and fifty-six; in the nineteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Richard Archibald Brooman, Her special licence that I, the said Richard
Archibald Brooman, my executors, administrators, and assigns, or such others
as I, the said Richard Archibald Brooman, my exccutors, administrators,
and 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 "AN IMPROVEMENT IN CRANES," (communicated to me by Camille Raymond
Neustadt, a foreigner residing abroad,) upon the condition (amongst others) that
I, the said Richard Archibald Brooman, my executors or administrators, by an
instrument in writing under my, or their, or one of 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 I, the said Richard Archibald Brooman, 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 in and by the following
statement thereof, reference being had to the Drawings annexed, that is
to say:
This Invention consists in substituting for. the drum and chain, ordinarily
employed in cranes, a pitch chain and chain wheel, with a case or guide for
causing the chain to gear into the wheel. The Inventor proposes to employ
the chain wheel and pitch chain with every description of crane, whether
stationary, moveable, or travelling.
By way of exemplification of the manner in which the Invention is carried
into effect, the annexed Drawings illustrate the improvement as applied to a
pivot crane.

page_text: Figure 1 is a back view, and Figure 2 a side elevation of such a crane,
with the improvement applied; Figure 3, a view of the pitch chain and chain
wheel detached. A is the chain wheel, and Y, the pitch chain; B, C, D, E,
F, G, a case or guide for forcing the chain to gear into the wheel, and follow
the direction of the post T, until it leaves the post at G, where it is unrolled
and hangs freely, or it may be brought back, if preferred, to the inside of the
post. The break works in the usual manner, being acted on by a lever X.
The crane is worked by one or more crank handles Z, in the usual manner.
The other parts of the crane are similar to those of cranes generally in use.
Figure 4 is a sectional elevation of a travelling railway crane constructed
according to this Invention. A is the chain wheel, used instead of a drum and
the pitch chain; B, C, D, E, case or guide for forcing the chain to gear in
the teeth of the wheel; F, G, H, I, a case or frame fixed between the cheeks
of the crane carriage, on to which the chain passes on leaving the guide
B, C, D, E.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim the employment
in cranes of a pitch chain and chain wheel, with a case or frame for guiding
the chain, instead of the drum and chain now ordinarily used.
In witness whereof, I, the said Richard Archibald Brooman, have here-
unto set my hand and seal, this Thirtieth day of October, One thousand
eight hundred and fifty-six.
R. A. BROOMAN. (L.S.)