IMPROVEMENTS IN APPARATUS FOR RAISING WEIGHTS
Year: 1866

page_text: LETTERS PATENT to William Eades and William Thomas Eades, of
Birmingham, in the County of Warwick, Machinists, for the Invention
of "IMPROVEMENTS IN APPARATUS FOR RAISING WEIGHTS."
PROVISIONAL SPECIFICATION left by the said William Eades and William
Thomas Eades at the Office of the Commissioners of Patents, with their
Petition, on the 22nd June 1866.
We, WILLIAM EADES and WILLIAM THOMAS EADES, of Birmingham, in the
County of Warwick, Machinists, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN APPARATUS FOR RAISING WEIGHTS," to be as
follows, that is to say:-
Our Invention consists in an improved pulley block constructed after the
following manner :-We employ a pulley having sinkings or chambers upon
its periphery to receive the links of a single chain, which chain hangs with
both ends loose and terminating with hooks, so that whilst one end of the
chain is on the ascent the other is on the descent; this pulley is attached
to or formed upon a toothed wheel having cogs or teeth inside the periphery
or rim of the wheel, in which cogs or teeth another toothed wheel works;
the second or inside wheel has one tooth, or more than one less than the

page_text: outside wheel. The inside wheel works loose upon an eccentric, by the
action of which it is caused to play within the outside toothed wheel, and
being fixed to an oscillating plate attached to the arm or side of the block it
has no circular motion. The revolution of the eccentric causes the outside
toothed wheel to advance one or more teeth, and as that wheel is part of or
is attached to the pulley on which the chain is worked it causes the chain
pulley to rotate with itself. The eccentric is caused to revolve by means of a
pulley worked by an endless chain, a rope, and spocket wheel, or any other
convenient means. The toothed wheels may if preferred be reversed, the one
formed on the chain pulley may be the smaller, the outside one working on
the eccentric may be the larger. A compound pulley of this description is
formed by repeating the gearing on the opposite side of the chain pulley, and
employing a double spindle one within the other, by which means a still
further reduced speed may be gained.
To apply our Invention to a crane or hoist of any description we simply
mount the improved pulley block on the beam of the crane or hoist, and work
it by means of an endless chain or band, by pulley and winch handle, or by
any other convenient means.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filod
by the said William Eades and William Thomas Eades in the Great Seal
Patent Office on the 21st December 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
EADES and WILLIAM THOMAS EADES, of Birmingham, in the County of
Warwick, Machinists, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-second day of June, in the year of our Lord
One thousand eight hundred and sixty-six, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said William Eades and William Thomas Eades, Her special license that
wc, the said William Eades and William Thomas Eades, our executors,
administrators, and assigns, or such others as we, the said William Eades
and William Thomas Eades, our executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ircland, the Channel Islands, and Isle of Man, an Invention for

page_text: par-
"IMPROVEMENTS IN APPARATUS FOR RAISING WEIGHTS," upon the condition
(amongst others) that we, the said William Eades and William Thomas
Eades, by an instrument in writing under our hands and seals, should
ticularly describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed in
the Great Scal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said William Eades and William Thomas
Eades, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, reference being had to the Drawings
hereunto annexed, and to the letters and figures marked thereon (that is to
say):-
-
Our Invention consists in an improved pulley block constructed after the
following manner:-We employ a pulley having sinkings or chambers upon
its periphery to receive the links of a single chain, which chain hangs with
both ends loose and terminating with hooks, so that whilst one end of the
chain is on the ascent the other is on the descent. This pulley is attached to
or formed upon a toothed wheel having cogs or teeth inside the periphery or
rim of the wheel, in which cogs or teeth another toothed wheel works; this
second or inside wheel has one tooth or more than one less than the outside
wheel. The inside wheel works loose upon an eccentric, by the action of which
it is caused to play within the outside toothed wheel, and being fixed to an
oscillating plate attached to the arm or slide of the block it has no circular
motion. The revolution of the eccentric causes the outside toothed wheel to
advance one or more teeth, and as that wheel is part of or is attached to the
pulley on which the chain is worked it causes the chain pulley to rotate with
itself. The eccentric is caused to revolve by means of a pulley worked by an
endless chain, a rope, and spocket wheel, or any other convenient means.
The toothed wheels may if preferred be reversed, the one formed on the chain
pulley may be the smaller, the outside one working on the eccentric may be
the larger. A compound pulley of this descripton is formed by repeating the
gearing in the opposite side of the chain pulley, and employing a double
spindle one within the other, by which means a still further reduced speed
be gained.
may
To apply our Invention to a crane or hoist of any description we simply
mount the improved pulley block on the beam of the crane or hoist, and work
it by means of an endless chain or band, by pulley and winch handle, or by
any other convenient means.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 represents a part elevation of one side of the block, shewing the
oscillating bar in dotted lines; Figure 2, a part elevation of the opposite side;
Figure 3, a vertical section; Figure 4, a similar section of a compound pulley
block constructed according to our Invention; and Figure 5, a vertical section
of a modified form of our improved pulley block.
Over the pulley (g) is worked a chain (a), which chain is not fastened to
the pulley, but takes its hold by the links of the chain fitting into or engaging
in chambers on the pulley (9). The chain (a) is a single chain having the
loose ends furnished with hooks. The pulley (b) is worked by the hand
chain (h), which passes over it and works upon that pulley in the same way
as the chain (a) upon the pulley (9), but the chain (h) is a double or endless
chain. The pulley (9) revolves upon the spindle (i), upon which spindle
is also fixed or formed an eccentric (d), and upon the periphery of this
eccentric (d) are placed frictionless rollers (a). Upon the outside of these
rollers (d) is hung a toothed wheel (f), which is kept in position by
projections (f) on its outer surface engaging on the arms of the plate (e),
thus allowing a sideways motion to the wheel (f). The plate (e) has
a vertical motion, and is kept in place by the frame of the block, and
thus the toothed wheel (f) has no circular motion, but is free to work
laterally with the eccentric (d). Motion is obtained by reason of the toothed
wheel (c), within which the toothed wheel (f) works, having one tooth more
than the wheel (f), thus causing it on each revolution of the eccentric to
advance one tooth. A compound pulley block of this description can be
formed, as shewn in section (Figure 4), by repeating the toothed wheel
gearing on the opposite side of the chain pulley, and employing a double
spindle; and this form of pulley can be worked by an endless rope running in
the forks (j) of a spocket wheel, which thus imparts motion through the
eccentric (7) and toothed wheel (m) held by the plate (n), as described in
(Figure 3), to the toothed wheel (o) fixed upon a hollow spindle (p) working
round the spindle (k). Upon the spindle (p) is fixed another eccentric (9)
operating in exactly similar manner to that already described on the other side
of the block through the toothed wheel (r,) held in place by the plate (s),
driving the toothed wheel (t), and thus giving motion to the chain pulley (v)
at a much reduced speed.
In applying our Invention to a crane or hoist of any description it is simply
necessary to mount this improved pulley block on the beam of the crane or

page_text: hoist, and work it by means of an endless chain or band by pulley and winch
handle, or other convenient means.
Figure 5 exhibits a modified form of pulley block, which consists of making
the eccentric (d) to revolve loose upon the spindle (i), instead of being fixed
thereto or forming part of the same.
By another modification we make the block with a different arrangement
of similar parts, and form the large toothed wheel a fixture to the side of the
frame of the block, and the small wheel is worked by the eccentric round the
inside of the larger whecl at a much reduced speed, and this motion is com-
municated to the lifting wheel by means of a cross-shaped plate, two of the
arms of which plate work in a suitable recess in the small toothed wheel, the
other two arms working in a recess in the lifting wheel, which gives the lifting
wheel a continuous motion.
Although we have described a single chain having a hook at each end, as
shewn at (Figure 2), we also attach or fasten, if required, one or both ends of
the chain to the block at the top, and place a snatch block in the loop thus
formed, which gives an increased amount of power.
Having thus described the nature of our said Invention, and the manner in
which the same is to be carried into effect, we claim, without limiting our-
selves to these precise details, the within described improved apparatus for
raising weights, as herein fully set forth and specified.
In 'witness whereof, we, the said William Eades and William Thomas
Eades, have hereunto set our hands and seals, this Twentieth day of
December, in the year of our Lord One thousand eight hundred and
sixty-six
WILLIAM EADES.
(L.S.)
WILLIAM THOMAS EADES. (L.S.)