Improvements in Driving Mechanism for Cranes, Crabs, Winches and the like.
Year: 1899

page_text: Date of Application, 8th May, 1893 -Accepted, 17th June, 1899
COMPLETE SPECIFICATION.
Improvements in Driving Mechanism for Cranes, Crabs, Winches
and the like.
We, THOMAS BAXENDALE, of 225, Lyons Lane, GEORGE BAXENDALE, of
17, Victoria Street, Machine Makers, and JAMES GENT, of 42, Gillibrand Street,
Manager, all of Chorley, in the County of Lancaster, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement, that
is to say:
It relates to improvements in driving mechanism for cranes, crabs, winches
and the like, and consists in so arranging and constructing same that the load
or weight being raised may be held at any altitude as may be required, and
may be lowered from such position at any desired speed, while further said means
or mechanism are simple in construction and easy of operation.
In order that our said invention may be readily understood we have hereunto
appended a sheet of drawings illustrative thereof, to which, by figures and
letters, reference is made in the following description.
Fig. 1 is a front elevation of a sufficient portion of a crane as will illustrate the
application thereto of our improved driving mechanism.
Fig. 2 is an end elevation of parts shown by Fig. 1.
Figs. 3, 4 and 5 are detail drawings of the sleeve and parts connected thereto
as hereinafter described.
Figs. 6, 7 and 8 are detail drawings of the driving pinion hereinafter described.
Similar figures and letters of reference indicate similar parts throughout the
several views.
In carrying our invention into effect we mount the pinion a which drives the
gear wheel band (by means of the shaft 6) the crane or like barrel c, to revolve
loosely upon a sleeve d, said sleeve rotating on the shaft c mounted in the frame-
work of the crane or the like. The sleeve d is provided with a ratchet wheel g
which may be fixed thereto or formed integrally therewith and having teeth g
into which takes the pawl or ratchet h mounted on the framework f. The said
sleeve d is also provided with a washer or brake part formed of indiarubber,
leather or other suitable substance, and has also formed on a portion of its
periphery, as shown, a screw thread, into which meshes an internal thread
formed in the boss of the handle k.
Instead of fixing the ratchet wheel g to the sleeve d, and allowing them to
revolve loosely on the shaft e, we may fix the bush and ratchet wheel g
separately and at any convenient distance apart, on the shaft e, in which case
said shaft e will revolve in its bearings.
From the foregoing description it will be seen that when the handle is
rotated in the direction for raising a load or weight the boss k¹ will move on
the sleeve by means of the screwed part and into contact with the pinion a
causing the face a¹ of said pinion a to be pressed against the brake part d', thus
the handle k, sleeve d and pinion ɑ become locked and will move together, con-

page_text: sequently the wheel b and barrel c will be driven by the pinion a and the weight
raised as desired.
The weight is held at any required altitude by means of the pawl or ratchet h
dropping into contact with the teeth g¹ of the ratchet wheel g, and thus preventing
its rotation in the reverse direction to that described, however should it be
desired to lower the weight or load, then the handle is rotated slightly in the
opposite direction to that required when raising the load, by this means the
pinion a will be released from the brake part d and can revolve loosely on its
sleeve d, the weight thus being allowed to descend. By regulating the amount
of rotation of the handle k in the reverse direction as above described, the amount
of friction between the face a¹ of the pinion a and the brake part & may also be
regulated, hence the load may be lowered at any desired speed, or it may be
stopped at any part of its descent by tightening or locking the several parts
together by means of the handle & as when raising the weight as above described.
If desired we may fix a cap or stop-piece m on the shaft e (as shown by Figs. 1
and 2) or on the framework f, in order to limit the motion of the handle k when
same is being reversed for lowering the load.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what
we claim is:-
-:
1. In driving mechanism for cranes, crabs, winches and the like, the several
parts arranged in combination substantially as herein specified.
2. The improved driving mechanism for cranes, crabs, winches and the like
the same being constructed and arranged to operate substantially as herein
specified.