Improvements in Lifting Appliances.
Year: 1891

page_text: Date of Application, 3rd Jan., 1891
Complete Specification Left, 3rd Oct., 1891-Accepted, 28th Nov., 189
PROVISIONAL SPECIFICATION.
Improvements in Lifting Appliances.
I, WALTER AGUSTUS FEY of Lothair Villas, South Ealing in the County of
Middlesex Engineer do hereby declare the nature of this invention to be as
follows:-
This invention relates to the manner in which I construct and arrange a differential
pulley block or appliance for raising and lowering heavy bodies, whereby I am
enabled to more effectively manipulate the hand lifting chain or lowering chain
than is at present possible with the systems of construction now in ordinary use.
I mount a
In carrying my invention into effect I construct a pulley block with a pair of
outside frames or side plates made of metal or other suitable material and between
these plates I mount a number of wheels for raising and lowering the load chain and
for receiving the motion from the hand chain in a special manner.
central spindle which I call my chain wheel spindle between the side plates or
frames and I place upon the outside ends of this spindle, collars or nuts or any other
usual fastening for securing the plates to the pin; the pin I also recess down to
form a shoulder or collar preferably at each end, as a distance piece to keep the
side plates correctly placed and thus to prevent friction upon the sides of the wheels
within. Upon the central spindle I place two chain grooved wheels having recesses
or projections formed upon them to receive a chain of usual or ordinary construction
for such purposes: one wheel being slightly larger than the other to permit of the
chain being lowered from the one at a different rate to the raising effect of the other.
Upon each of the independent chain wheels which I thus mount upon the central
spindle I cast or place in any well known manner a toothed, driving wheel and thus
I allow each chain wheel with its separate or self contained tooth wheel to be free
to revolve upon the central shaft or spindle.
Between the side frames I also mount a second spindle or a series of spindles to
carry suitable tooth wheels, or ordinary gearing wheels to transmit the motion from
one of the chain wheels to the other thus the ratio of the wheels I alter or arrange
to suit any particular load that is to be raised or lowered.
Instead of making the chain wheels of different diameters I sometimes make them
of equal size and proportion, the gearing to suit any desired difference of speed
between the motion of the two wheels. The chain I prefer to use in the form of a
loop or endless length by means of a falling or bottom block having a hook to
receive the load while the free end of the chain I employ as my hand or manipulating
chain. By means of the peculiar position of my chain wheels, I am enabled to
draw the hand chain portion of the loop or length of chain away from the line of
travel of the load and thus to operate upon the same with greater convenience than
is at present obtained with the employment of the ordinary differential pulley
block.
I do not always employ my improved arrangement of gearing and chain wheels
to cases where loads are to be raised by means of a single hook, but sometimes
arrange each chain wheel to act as a lifting and a lowering wheel; thus obtaining a
double lifting and lowering device.
I construct the hooks and other portions of my improved pulley blocks in any
usual or ordinary manner and I place intermediate plates or frames between the
side plates or frames together with chain guides or rollers to suit any particular
load that is to be carried, raised, or lowered.
I employ my improved arrangement of gearing and chain wheels to any ordinary

page_text: hoisting appliance constructed for any peculiar purpose, in the manner hereinbefore
described when constructing a differential or chain pulley block.
Dated this 2nd day of January 1891.
CLERK & MARKS,
13, Temple Street, Birmingham, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Lifting Appliances.
I, WALTER AUGUSTUS FEY, of Lothair Villas, South Ealing, in the County of
Middlesex, 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 :-
This invention relates to the manner in which I construct and arrange a
differential pulley block or appliance for raising and lowering heavy bodies, whereby
I am enabled to more effectively manipulate the hand lifting or lowering chain
than is at present possible with the systems of construction now in ordinary use.
In carrying my invention into effect, I construct a pulley block in one manner as
illustrated in the accompanying sheet of explanatory drawings,
Figure 1 being a sectional elevation, Figure 2 an end elevation, and Figure 3 a
sectional end elevation on the line xx.
I arrange a pair of outside frames or side plates A, A' made of metal or other
suitable material, and between these plates I mount intermediate strengthening
plates B, B to enclose a number of wheels C, D, E, F, G, for raising and lowering
the load chain H, and for receiving the motion from the hand end of the chain H
in a special manner. I mount a central spindle O, which I call my chain wheel'
spindle, between the side plates or frames, and I place upon the outside ends of this
spindle, collars or nuts N or any other usual fastening; the pin I also recess down
to form a shoulder or collar preferably at each end, as a distance piece to keep the
side plates correctly placed and thus to prevent friction upon the sides of the wheels
within. Upon the central spindle I place two chain grooved wheels C¹; G¹ having
recesses or projections formed upon them to receive a chain H of usual or ordinary
construction for such purposes; one wheel being sometimes slightly larger than the
other to permit of the chain being lowered from the one at a different rate to the
raising effect of the other.
The chain wheel C¹ I secure to the central spindle O, and I also secure to the same
spindle the toothed gearing wheel C so that the chain wheel C' and the gearing
wheel C may revolve together; the other chain wheel G¹ I cause to run loosely
upon the spindle O and to drive the gearing wheel G by means of a projecting
bush which I cast upon either the chain wheel G¹ or the wheel G, the bush g
having one wheel keyed or secured to it in any ordinary manner.
I cause the wheel C to give motion through the idle wheel D running on the
spindle d, to the upper pinion wheel cast with the wheel F mounted upon the
spindle. The wheel F in turn driving the wheel G connected to the chain
wheel G upon the central spindle O.
By this arrangement of gearing I am enabled by pulling the chain loop H¹ on
the ends of the chain wheels C₁, G¹ to cause the hook on the bottom block M to be
raised or lowered at will. The wheels C', G¹ revolving in opposite directions, the
chain is lowered from the one and taken up upon the other, the rate at which each
chain wheel gives out or takes up the chain wound off or wound on to its opposite
companion wheel being determined by the ratio of the gearing wheels C, E, F, G,
which I proportion to suit any desired load that is to be raised.
When arranging my improved pulley block to raise a load of 3 tons; I prefer to
proportion the wheels C, E, F, G as follows, in order that a fair pull upon the
chain H shal. raise the block M the desired distance.-The first chain wheel G³
drives the wheel G having IB teeth which gears into the wheel F Having 17 teeth,

page_text: thereby driving the connected pinion E having 14 teeth; the pinion F drives
through the intermediate wheel D the wheel C having 13 teeth, thus causing the
chain wheel C¹ connected to C to revolve and lower out the chain while the wheel G¹
takes it up, and as the ratio of the wheels occasion the chain to be raised at a
quicker rate than it is lowered the heavy load upon the hook is raised with a
moderate pull upon the hand chain or loop end of the chain.
Instead of making the chain wheels of different diameters I sometimes make them
of equal size, and proportion the gearing to suit any desired difference of speed
between the motion of the two wheels.
The chain I prefer to use in the form of a loop or endless length, by means
of a falling or bottom block having a hook to receive the load; while the free
end of the chain I employ as my hand or manipulating chain. By means of
the peculiar position of my chain wheels, I am enabled to draw the hand chain
portion of the loop or length of chain away from the line of travel of the load
and thus to operate upon the same with greater convenience than is at present
obtained with the employment of the ordinary differential pulley block.
I construct the hooks L, M, and other portions of my improved pulley blocks
in any usual or ordinary manner, and I place intermediate plates or frames
between the side plates or frames, together with chain guides K or rollers to
suit any particular load that is to be carried or raised or lowered.
I sometimes arrange the falling block M to work with my improved arrange-
ment of gearing by causing the chains to cross the chain wheels, that is, one to
lift on one side, and the other to lower from the opposite side of the frame, so
as to reduce the number of wheels employed between the frames.
I employ my improved arrangement of gearing and chain wheels to suit any
ordinary hoisting appliance constructed for any peculiar purpose, and to raise
any desired load constructed similarly to the manner hereinbefore described for
a differential or chain pulley block.
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)-The construction and arrangement of pulley blocks having two chain
wheels revolving in opposite directions and working one from the other by means
of intermediate gearing, substantially as and for the purposes herein described
and illustrated in the accompanying drawings.
(2) The construction of appliances for lifting and lowering heavy bodies
having two independent chain wheels revolving in opposite directions and
mounted upon one central spindle substantially as and for the purposes herein-
before described.
Dated this 2nd day of October 1891.
CLERK & MARKS,
13, Temple Street, Birmingham, Agents for the Applicant.