Improvements in Winding Mechanism for Hoists and like purposes.
Year: 1893

page_text: Date of Application, 10th Feb., 1893
Complete Specification Left, 9th Nov., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Winding Mechanism for Hoists and like purposes.
I, WILLIAM HENRY LINDSAY, of The Shaw Engineering Works, Ashton
Gate, Bristol, Manager, do hereby declare the nature of this invention to be as
follows:-
The winding mechanism is composed of a drum with flanged ends similar to those
in ordinary use in crabs and winches whereon a chain or rope is to be wound. The
drum is mounted upon an axis which at its ends is carried by fixed standards. On
each end of the drum or barrel is cast a recessed chamber. A. cone is made to
project into each of these chambers-one of these cones projects from the hub of a
driving pulley which turns loosely around the axis at one end of the barrel the
other is fast with the standard by which the opposite end of the axis is carried.
The annular space between each cone and the sides of the chamber that it enters
into is filled with a number of split metallic rings placed together side by side-the
inner circumference of each ring is turned conical to fit the cone and the rings
being split radially can expand slightly.
The rings also have notches in their outer circumference into which feathers
fast with the interior of the chambers enter to keep the rings from turning within
the chambers. The barrel is free to be moved endwise to and fro a short distance
along the barrel by means of a lever. The lever is acted upon by a strong spring
which tends always to turn it in a direction to move the barrel away from the
driving pulley. When it is held over in this direction it is disengaged from the
driving pulley and the split rings which are contained in the chamber at the opposite
end of the barrel are forced along the fixed cone which they embrace-the cones
are in this way made to grip the cone tightly and act as a brake to lock the barrel
and keep it from turning.
When the barrel is forced endwise in the opposite direction by means of the
lever the rings embracing the fixed cone are drawn towards the smaller end of the
cone and so disengaged from it and then the split rings at the opposite end of
the barrel which embrace the cone on the hub of the driving pulley are forced along
this cone and similarly made to grip it and so the barrel is locked to the pulley and
driven by it.
When the barrel is held by the lever in an intermediate position the barrel is
free both from the fixed cone and from the cone on the driving pulley and can turn
freely around the axis.
The rings may either be flat or they may be dished so as to overlap one another
and give increased holding power.
Dated thin 7th 10 of Wah 1902
COMPLETE SPECIFICATION.
Improvements in Winding Mechanism for Hoists and like purposes.
I, WILLIAM HENRY LINDSAY, of The Shaw Engineering Works, Ashton Gate,
Bristol, Manager, 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 :-
The winding mechanism is composed of a drum with flanged ends similar to those
in ordinary use in crabs and winches whereon a chain or rope is to be wound.
The drum is mounted upon an axis which at its ends is carried by fixed standards.

page_text: On each end of the drum or barrel is cast a recessed chamber. A cone is made to
project into each of these chambers-one of these cones projects from the hub of a
driving pulley which turns loosely around the axis at one end of the barrel the
other is fast with the standard by which the opposite end of the axis is carried.
The annular space between each cone and the sides of the chamber that it enters
into is filled with a number of split metallic rings placed together side by side-the
inner circumference of each ring is turned conical to fit the cone and the rings
being split radially can expand slightly.
The rings also have notches in their outer circumference into which feathers
fast with the interior of the chambers enter to keep the rings from turning within
the chambers. The barrel is free to be moved end wise to and fro a short distance
along the barrel by means of a lever. The lever is acted upon by a strong
spring which tends always to turn it in a direction to move the barrel away from
the driving pulley. When it is held over in this direction it is disengaged from
the driving pulley and the split rings which are contained in the chamber at the
opposite end of the barrel are forced along the fixed cone which they embrace-
the rings are in this way made to grip the cone tightly and act as a brake to lock
the barrel and keep it from turning.
When the barrel is forced endwise in the opposite direction by means of the
lever the rings embracing the fixed cone are drawn towards the smaller end of
the cone and so disengaged from it and then the split rings at the opposite end of
the barrel which embrace the cone on the hub of the driving pulley are forced
along this cone and similarly made to grip it and so the barrel is locked to the
pulley and driven by-it.
When the barrel is held by the lever in an intermediate position the barrel is
free both from the fixed cone and from the cone on the driving pulley and can turn
freely around the axis.
The rings may either be flat or they may be dished so as to overlap one another
and give increased holding power. Other clutch mechanism may also be substituted
for the split rings.
The drawings annexed shew winding mechanism constructed according to my
invention.
Figure 1 is a longitudinal section of one arrangement of the winding mechanism.
Figure 2 is a cross section of the same.
A is the winding drum, B a fixed axis around which the drum can revolve freely.
CC are standards by which the axis B is carried. A' A¹ are hollow chambers in
the ends of the drum A. D is a cone fixed to one standard C and projecting into
the chamber A' at one end of the drum and E is a cone projecting into the
chamber A¹ at the other end of the drum and forming part of the hub of a pulley
or wheel F which can turn freely around the axis B and is driven continuously by
a band or otherwise. GG are split metallic rings interposed between the
cones D, E and the sides of the chambers A'. One of the rings is shewn separately
at Figure 3. A2 are feathers projecting from the sides of the chambers A¹ and
entering notches in the split rings to prevent them turning within the chambers.
A³ is a groove formed around the exterior of the flange at one end of the
drum A.
H is a three armed lever turning on a fulcrum at H¹-the end of one arm enters
the groove A³ a strong spring I is connected to the opposite arm and tends always
to move the drum towards the standard C which carries the fixed cone D-the
third arm serves as a hand lever for moving the drum endwise in the opposite
direction or for holding it in a central position as above explained.
In Figure 4 I have shewn how the split rings may be dished in place of being
flat as shewn in Figure 1. In place also of the rings being slit radially as shewn
in Figure 3 they may be formed with their ends overlapping as shewn at Figures 5,
6 and 7. Each then forms a portion of a coil-or each assemblage of split rings
might be replaced by one single coiled bar which at its inner end was secured to
the chamber A¹.

page_text: Other forms of friction clutch mechanism may also be used in place of the split
rings and cone. For example a single dished disc slit radially may as shewn at
Figures and be fixed to the end of the drum which is towards the driving
pulley or wheel F so that when the drum is moved endwise towards this wheel the
disc is flattened and its circumferential edge forced against the interior of the rim
of the wheel as in the clutch mechanism described in another application for Patent
made by me No. 2998 of 1893.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what
I claim is :-
1. Winding mechanism composed of a winding drum capable of being moved
endwise along its axis a wheel to be driven continuously mounted on the axis close
up to one end of the drum-friction clutch surfaces at the two ends of the drum―
those at one end to lock the drum to the revolving wheel-those at the other to
lock the drum to a fixed support-a spring or weight acting to move the drum
away from the wheel and a lever or other mechanism for shifting the drum endwise
either to keep it engaged with the driving wheel or to hold it in a central position
with neither set of clutch surfaces in action.
2. The construction of winding mechanism substantially as herein before
described and illustrated in the drawings annexed.
Dated this 9th day of November 1893.
W. H. LINDSAY.