IMPROVEMENTS IN OR APPLICABLE TO HYDRO-EXTRACTORS
Year: 1875

page_text: LETTERS PATENT to Thomas Broadbent, of Huddersfield, in the
County of York, Engineer, for the Invention of "IMPROVEMENTS IN
OR APPLICABLE TO HYDRO-EXTRACTORS."
Scaled the 28th September 1875, and dated the 30th March 1875.
PROVISIONAL SPECIFICATION left by the said Thomas Broadbent at
the Office of the Commissioners of Patents, with his Petition, on
the 30th March 1875.
I, THOMAS BROADBENT, of Huddersfield, in the County of York,
Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN OR APPLICABLE TO HYDRO-EXTRACTORS," to be as follows:-
My Invention consists,―
Firstly. In constructing the spindle of the cage with or applying
thereto a crank for the connecting rod of a steam or other motive-power
engine to be attached to, so as to drive direct from the piston rod. For
this purpose the framework is suitably constructed for a small engine to
be fixed thereto, and form part of the machine; also an eccentric is -

page_text: either formed on or fixed to the cage spindle for working the valve, and
both the crank and eccentric are properly balanced by fixed weights.
Secondly. In applying a valve to the said engine for regulating the
admission of steam so constructed and governed as to gradually increase
the speed or rotation of the cage up to a certain speed, when the steam
is cut off and the cage runs for sometime by momentum; it is then
stopped by a brake.
Thirdly. In having the necks and bushes for the bearings of the spindle
of conical form, the bushes being screwed into the bearings so that they
can readily be set or adjusted to compensate for wear caused by the 1
engine; also in having the bearings split, and provided with a screw bolt,
so that when the bushes are set or adjusted they can be made fast or
secure, and readily loosened for adjusting.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Broadbent in the Great Seal Patent
Office on the 30th September 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
BROADBENT, of Huddersfield, in the County of York, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of March, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Thomas Broadbent, Her
special licence, that I, the said Thomas Broadbent, my executors,
administrators, and assigns, or such others as I, the said Thomas
Broadbent, my executors, 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 "IMPROVEMENTS IN OR APPLICABLE TO HYDRO-EXTRACTORS,"
upon the condition (amongst others) that I, the said Thomas
Broadbent, my executors or administrators, by an instrument in writing

page_text: framework F. On the spindle B is also an eccentric G, to which is
connected the valve rod H of the engine. Both the crank C and
eccentric are balanced by means of weights J and K attached to the
spindle. L are the fixings in which the conical bushes for the spindle
bearings are secured; these fixings are split, and provided with screw
bolts M, by means of which the bushes can be readily adjusted.
Fig. 2 illustrates the second part of my Invention. It consists of a
valve a attached to the steam chest, for the purpose of shutting the
steam off when the full speed of the machine has been attained; 6 is the
inlet and c the outlet part of the valve, which is opened and shut by
means of the spindle d attached to the lever c, hinged at f, the other
end being supported by the bell-crank lever g, attached to the governor
spindle by the arm g¹. When it is required to set the apparatus in
motion the valve a is opened by lifting up the lever e, and supporting it
by the bell-crank lever g. The valve is thus opened, and remains so until
the engine has attained its greatest speed, when the bell-crank lever is
removed by the governor spindle from beneath the end of the lever e,
which thus falls and closes the valve.
In witness whereof, I, the said Thomas Broadbent, have hereunto
set my hand and scal, this Twenty-fifth day of September, in
the year of our Lord One thousand eight hundred and seventy-
five.
Witness,
J. W. TASKER,
Patent Agent,
Halifax.
THO³. BROADBENT. (L.s.)