IMPROVEMENTS IN WINCHES AND OTHER HOISTING PROVISIONAL SPECIFICATION
Year: 1883

page_text: LETTERS PATENT to William Clarke of the firm of Clarke Chapman and
Company, of Victoria Works Gateshead-on-Tyne in the County of Durham
for an Invention of "IMPROVEMENTS IN WINCHES AND OTHER HOISTING
PROVISIONAL SPECIFICATION left by the said William Clarke at the Office
of the Commissioners of Patents on the 20th December 1883.
WILLIAM CLARKE of the Firm of Clarke Chapman and Company of Victoria
"IMPROVEMENTS IN
Works Gateshead on Tyne in the County of Durham
WINCHES AND OTHER HOISTING MACHINERY"
According to my Invention I construct a Winch or hoist as follows:—
On the Engine or Power Shaft a pinion is formed or fixed and on the same shaft
alongside the pinion is mounted a disc loose on the said Shaft and carrying a
pinion or pinions each mounted loosely on a pin or gudgeon fixed to or formed on
the Disc. This Pinion or these pinions gears or gear into an internal toothed wheel
cast on or keyed to the lifting barrel of the Winch or Hoist-Alongside the loose
disc a clutch is fitted so that it can be slidden along the shaft to engage with the
loose disc above mentioned and cause it to revolve with the said Shaft.
Around the rim of the said loose disc an ordinary brake is fitted and round the
rim of the internal spur wheel an ordinary brake is also fitted.
By the alternate application of these brakes and Clutch the Barrel of Hoist can
be made to lift at various speeds and lower at will and by sliding the clutch in,
the barrel can be made to revolve at the same speed as the power shaft.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Clarke in the Patent Office on the 20th June 1884.
WILLIAM CLARKE of the firm of Clarke Chapman and Company of Victoria
Works Gateshead on Tyne in the County of Durham Engineers "IMPROVEMENTS
IN WINCHES AND OTHER HOISTING MACHINERY
According to my Invention I construct a winch or hoist as follows reference
being had to the accompanying drawing which represents in end view (figure 1)
and longitudinal section (figure 2) so much of a winch or hoist as is necessary to
illustrate my Invention.
On the Engine or Power shaft A a pinion A³ is formed or fixed and on the same
shaft and at the side of the pinion is mounted a disc B loose on the said shaft A
and carrying a pinion or two or more pinions-In the drawing I have shewn two
such pinions marked C. Each said pinion is mounted loosely on a pin D or
gudgeon fixed to or formed on the disc B. The pinion or pinions C gears or gear
into the pinion A2 and an internal toothed wheel E cast on or keyed to the lifting
barrel F of the winch or hoist-Alongside the loose disc B a clutch G may be
fitted so that it can be slidden along the shaft A to engage with the said loose
disc B to cause it to revolve with the said shaft A
Around the rim of the said loose disc B an ordinary brake is fitted and round
the rim of the internal spur wheel E an ordinary brake is also fitted.
By the alternate application of these brakes and the clutch G the Barrel F of
the winch or hoist can be made to lift at various speeds and lower at will, and by
sliding the clutch G so that it engages with the disc B the said Barrel F can be
made to revolve at the same speed as the power shaft.
I can also at will dispense with the brake on the rim of the spur Wheel E for
comparitively light lifts
Having now described and particularly ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and original
and therefore claim as the Invention secured to me by the hereinbefore in part
recited Letters Patent is:-
In winches or other hoisting machinery the arrangement and combination of
parts substantially as and for the purpose hereinbefore described and illustrated by
the accompanying drawing.
In witness whereof I the said William Clarke have to this my Specification set
my hand and seal this eighteenth day of June One thousand eight hundred and
eighty four.
WILLIAM CLARKE (L.S.)