Year: 1898

page_text: I, FREDERIC EASTMEAD, of 39, Victoria Street, Westminster, London, S.W., do
hereby declare the nature of this invention to be as follows:
-
This invention consists of an arrangement to be used as part of a hoisting
machine driven by belting.
+6
open
"and one 86
On the first motion shaft of the hoisting machine I place three pulleys the
centre one being of a width to suit the driving belt and being secured to the shaft
and those on either side of it being about double this width and being bored so
as to revolve loosely upon the shaft without rotating it.
The machine is driven by two belts one
'crossed" and when
not lifting or lowering its load, the two belts are running one on each loose pulley.
When it is desired that the machine should raise or lower its load the belts are
moved laterally that is in a direction parallel with the axis of the shaft suffi-
ciently to bring one of the belts upon the centre or driving pulley.
The arrangements whereby the belts are controlled are as follows A sliding
cradle is placed in a suitable position near the peripheries of the pullies, sufficient
space being left between it and the pullies for the belts to run. This cradle can
move laterally a sufficient amount to bring either belt upon the centre pulley its
motion being guided by suitable slides attached to the framework of the machine.
Suitably shaped arms are attached to this cradle and are carried completely or
partially round the pullies in such a manner as to control the belts in whatever
direction they may be approaching the machine.
The lateral motion of the cradle is imparted to it as follows;-One end of one
of the shafts of the machine, preferably the shaft carrying the drum has cut on
it a screw thread, a wheel or lever having its boss suitably cut to engage this
screw thread runs loosely thereon, the handrope or similar operating device by
which the machine is controlled being attached as may be required to this wheel
or lever and around another portion of this wheel or lever passes a chain or rope
or similar suitable flexible contrivance, one end of this being carried round a
pulley fixed to the frame of the machine on the same side as the screwed end of
the shaft and attached to the sliding cradle, the other end of this being carried
round another pulley on the aforesaid frame of the machine, carried across the
machine to a similar pulley fixed to the frame on the opposite side, round this
pulley and then attached to the sliding cradle. Locknuts clips or other suitable
devices are placed on the screwed end of the shaft on either side of the wheel or
lever mentioned in such a manner that they can be adjusted laterally so that after
the drum has turned through the desired number of revolutions the aforesaid
wheel or lever on the shaft, which though not rotating has been compelled by the
screw to move laterally will be engaged by one or the other of them and rotated

page_text: in a suitable direction and to a sufficient amount to replace the belts in their
normal positions, one on each loose pulley.
This invention may also be used for controlling one belt on a hoisting machine
if desired.
Dated this Twenty-third day of June 1898.
Improvements in Hoisting Apparatus.
I, FREDERIC EASTMEAD, of 39, Victoria Street, Westminster, S.W., Engineer,
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:—
In order that my invention may be more readily understood I have caused 1
sheet of drawings to be made in which Fig. 1 is an elevation and Fig. 2 a plan of
my invention.
The invention consists of an arrangement to be used as part of a hoisting
machine driven by belting.
On the first motion shaft A of the hoisting machine I place three pulleys B
Fig. 1 the centre one being of a width to suit the driving belt and being secured
to the shaft, and those on either side of it being about double this width and
being bored so as to revolve loosely upon the shaft A Fig. 1 without rotating it.
The machine is driven by two belts one open and one crossed and when not
lifting or lowering its load the two belts are running one on each loose pulley.
When it is desired that the machine should raise or lower its load the belts are
moved laterally that is in a direction parallel with the axis of the shaft sufficiently
to bring one of the belts upon the centre or driving pulley.
to run.
The arrangements whereby the belts are controlled are as follows: A sliding
cradle C Fig. 1 and Fig. 2 is placed in a suitable position under the peripheries
of the pullies, sufficient space being left between it and the pullies for the belts
This cradle C can move laterally a sufficient amount to bring either belt
upon the centre pulley its motion being guided by suitable slides 1 and 11 Fig. 2
attached to the framework E of the machine. Suitably shaped arms F Fig. I are
attached to this cradle C and are carried completely or partially round the pullies
in such a manner as to control the belts in what ever direction they may be
approaching the machine.
The lateral motion of the cradle C is imparted to it as follows:-One end of
one of the shafts of the machine, preferably the shaft G earring the drum H Fig. 2
has cut on it a screw thread I Fig. 2. A wheel or lever J having its boss suitably
cut to engage this screw thread runs loosely thereon; The handrope or similar
operating device by which the machine is controlled being attached as may be
required to this wheel or lever J and around another portion K of this wheel or
lever J passes a chain rope or suitable flexible contrivance L Fig. 2, one end of
this is carried round a pulley M Fig. 2 fixed to the frame E of the machine on
the same side as the screwed end of the shaft I and passes through the frame E
and is attached to the cradle C by means of an eyebolt N. Fig. 2. The other end
of this chain L is carried round another pulley O Fig. 2 on the aforesaid frame E
of the machine, passes through the frame E and is carried across the machine
passing through the other frame E at a hole P Fig. 1 to another pulley R Fig. 1
and 2 fixed to the frame E' on the opposite side round this pulley R through the
frame E¹ at a hole S Fig. 1 and then attached to the sliding cradle C by an
eyebolt T. Locknuts clips or other suitable devices UU Fig. 2 are placed on the

page_text: screwed end I of the shaft G on either side of the wheel or lever J in such a
manner that they can be adjusted laterally so that when the drum H has turned
through the desired number of revolutions the aforesaid wheel or lever J on the
shaft G which though not rotating has been compelled by the screw I to move
laterally, will be engaged by one or the other of the locknuts U U and rotated in
a suitable direction and to a sufficient amount to replace the belts in their normal
position, one on each loose pulley.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The use of belt shifting arms carried right round the pulleys so as to control
the belts in whatever direction they may be approaching the pulleys.
2. The attachment of these arms to a sliding cradle substantially as described.
3. The combination of a screwed shaft chain and rope wheel (or lever) chain
and pulleys to actuate the cradle and stop the machine automatically, substantially
as described.
4. The combination of a screwed shaft chain and rope wheel (or lever) chain;
pulleys, sliding cradle and belt shifting arms substantially as described and illus-
trated in the accompanying drawings.
Dated this 04th
1 1000