Improvements in Cranes and Winches.
Year: 1887

page_text: Date of Application, 4th Mar., 1887
Complete Left, 8th Nov., 1887
Complete Accepted, 9th Dec., 1887
Improvements in Cranes and Winches.
WILLIAM JAMES 8 Lightfoot Street Chester, Engineer, and JOHN JONES, Cwm
Penmachno, Carnarvonshire, Quarry Manager, do hereby declare the nature of this
invention to be as follows:-
:-
On the same axle as the barrel upon which the chain or rope coils, we fix a worm
wheel, in which works a worin, with suitable spur or bevil gearing for revolving the
worm wheel, and consequently the barrel, the load being self sustaining in any position,
preventing the accidents so frequently occurring with existing arrangements, through
the running down of the weight being lifted. To allow of uncoiling rapidly when
unloaded, we provide for the barrel being revolved independently of the worm, as
follow-One end of the barrel shaft is curved, the other end working in a step, to
which is attached a screw, by which the worm wheel can be drawn out of, or put in
gear with, the worm, or a wedge may be used instead of the screw.
The same object may be attained by inserting the ends of the shaft in eccentric
bushes, provision being made for revolving these. Or the worm wheel may be loose
on its shaft, a sliding clutch working on same shaft, by which the worm wheel can
be made to revolve with the shaft when desired. These improvements are specially
suitable for Derrick Cranes in use at Slate and other quarries, also to Cranes and
Winches generally.

page_text: Improvements in Cranes and Winches.
WILLIAM JAMES 8 Lightfoot Street Chester, Engineer, and JOHN JONES, Cwm
Penmachno, Carnarvonshire, Quarry Manager, do hereby declare the nature of our
invention for IMPROVEMENTS IN CRANES AND WINCHES and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement:--
The drawings shew our invention as applied to a Hand Derrick Crane, figure 1
being a side elevation, and figure 2 a front elevation, the machinery being carried by
the frames KK (which are shewn broken) upon which is fixed a pulley over which
the chain passes to the winding barrel A. Our invention is applicable to other
hand, or steam cranes, but is intended chiefly for hand derrick cranes for use in Slate
and other quarries, to prevent the frequent accidents occurring through the slipping of
the breaks and catches on the existing cranes.
Similar letters on the two drawings
refer to different views of the same object.
A is the Winding barrel upon which the chain coils; B Barrel shaft; C Worm
Wheel D Worm or Screw; E Bevil pinion; F Bevil Wheel; G Handle Shaft with
Squares at each end to receive handles H Sliding Block for carrying one end of
Barrel Shaft; I Quick thread Screw; J Hand Wheel; K K Derrick frame, and
L Cross piece.
By means of handles at its ends the shaft G is caused to revolve, upon which is
keyed the Bevil Wheel F, gearing into pinion E, keyed on screw D, which works
into Worm Wheel C, this being fast upon Shaft B, upon which is also fastened the
chain barrel A, causes it to revolve coiling or uncoiling the chain according to the
direction in which the handle Shaft G is turned, lifting or lowering the weight with
perfect safety, the weight being self sustained in any position. When, no weight is
attached to the chain, and it is desired to wind or unwind same rapidly by hand,
wheel J is turned which by means of screw I and Block H, draws Worm Wheel C
out of gear with Worm D, the opposite end of shaft being barrel shape to admit of
this being done when the barrel can be turned independently by hand.
We do not confine ourselves to this mode of drawing Worm Wheel out of gear
with Screw or Worm, which may be accomplished by mounting the ends of the shaft
in eccentric bushes, means being provided for revolving these bushes.
Or the Worm Wheel may be loose on the shaft, a Sliding Clutch of the ordinary
description being used for causing the wheel to revolve with the shaft or not, as
desired.
Having now particularly described and ascertained the nature of our invention,
and in what manner the same is to be performed, we claim
The Construction of Cranes and 'Winches, substantially as. herein described and
llustrated by the accompanying drawings.
Dol
1
WILLIAM JAMES.
JOHN JONES.