Improvements in Hoisting and Winding Machinery.
Year: 1890

page_text: Date of Application, 11th June, 1850
Complete Specification Left, 10th Mar., 1891-Accepted, 2nd May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Hoisting and Winding Machinery.
I EDWARD SHAW of Canons Marsh City & County of Bristol Engineer, do
hereby declare the nature of this invention to be as follows:-
The use of a very simple form of friction clutch which being attached directly or
indirectly to a hoist barrel or drum can be made to couple on to a driving pulley
or to a brake rim. Thus constituting with suitable arrangements a hoist.
construct my hoist by fixing a shaft to a frame, at one end of this shaft is centred.
the driving pulley, the rim of which is turned true inside & overhangs on the side
towards the barrel. At a little distance, say one inch, from this edge of the pulley
is a strong brake ring, with true bore, similar to that of the pulley rim, attached to
the frame and fixed centrally with the shaft. The barrel sliding freely on the
shaft carries at the end adjacent to the pulley & ring one or more pivots or joints
whose axes are perpendicular shaft, and lie roughly speaking in a plane midway
between the adjacent edges of the pulley rim and brake ring, on these joints hinge
blocks; these blocks extend outwards and have an outer cylindrical surface of
metal, wood or suitable material, which extends laterally through the brake ring
in one direction and inside the overhung pulley rim in the other. Projecting from
this outer face of the block is a suitable lug which is prevented from lateral motion
by the adjacent pulley & brake rims. An axial motion given to the barrel in one
direction towards the pulley causes the block to swing on its axis and its outer
surface recedes from the brake rim and approaches and presses against the pulley
rim thus connecting together the driving pulley and barrel; while movement of the
barrel in the other direction causes the block to swing over and press outwards
against the brake rim thus constituting a brake. An intermediate position of the
barrel leaves it free and connected neither to the driving pulley nor to the brake.
The barrel may be on another shaft and in that case it is connected by gearing, the
pinion sliding on the fixed shaft and carrying the block or blocks and the spur
wheel being attached to the barrel.
D 10th 1900
EDWARD SHAW.
COMPLETE SPECIFICATION.
Improvements in Hoisting and Winding Machinery.
EDWARD SHAW Ashton Gate Bristol (formerly of Canons Marsh), Bristol 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:
My invention is for the employment of a very simple form of friction clutch
which being attached directly or indirectly to a hoist barrel or drum can be made
to couple on to a driving pulley or to a brake rim. Thus constituting a hoist.
I construct my hoist by fixing a shaft A to a frame B, at one end of this shaft
is centred the driving pulley C, the rim of which is turned true inside & over-
hangs on the side towards the barrel D. At a little distance say one inch from
the edge of the pulley is a strong brake rim E, with true bore similar to that
of the pulley rim, attached to the frame B and fixed centrally with the shaft A.
The barrel D is made to slide freely endways on the shaft by means of the lever F.
and carries at the end adjacent to the pulley C. and ring E. one or more pivots or
joints whose axes are perpendicular to the shaft, and lie roughly speaking in a

page_text: plane midway between the adjacent edges of the pulley rim C and brake ring E,
on these joints hinge blocks G, these blocks G extend outwards and have an outer
cylindrical surface of metal, wood or suitable material, which extends laterally
through the brake ring E in one direction & inside the overhung pulley rim in the
other. Projecting from this outer face of the block is a suitable lug which is
prevented from lateral motion by the adjacent pulley C and brake E. rims. An
axial motion given to the barrel D in one direction towards the pulley C causes
the block G to swing on its axis and its outer face recedes from the brake rim and
approaches & presses against the pulley rim thus connecting together the driving
pulley C and barrel D while movement of the barrel D in the other direction
causes the block G to swing over and press outwards against the brake rim E thus
constituting a brake. An intermediate position of the barrel leaves it free &
connected neither to the driving pulley nor to the brake. The barrel D. may be
on another shaft & in that case it is connected by gearing, the pinion sliding
on the fixed shaft & carrying the block or blocks, & the spur wheel being attached
to the barrel.
Having now particularly described & ascertained the nature of my said inven
tion & in what manner the same is to be performed I declare that what I
claim is
1. The use of one or more blocks free to work on axes and arranged in com-
bination with a driving and brake rings so that an end movement of the axis causes
the block to come in frictional contact with one or other of the rings substantially
as described.
Dated that
1 1001
EDWARD SHAW.