Improvements in Machinery or Apparatus for Raising and Lowering Weights.
Year: 1896

page_text: Date of Application, 2nd Apr., 1896
Complete Specification Left, 11th Dec., 1896-Accepted, 27th Feb., 1897
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Raising and Lowering
Weights.
I, JAMES SWALWELL The Lea, 29 Godfrey Road, Newport Mon. Manager of
Works, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to simplify & cheapen the construction of that
class of machinery used for raising & lowering weights and which consists of
two loose lifting wheels and a pinion gearing into the teeth of the lifting wheels;
one of the lifting wheels having one tooth more or less than the other.
In carrying out my invention I use two lifting wheels with sunken chambers
provided on each for chains, and on each lifting wheel an internal wheel is cast;
one wheel having one more tooth than the other. Upon this wheel I provide a
recess deeper than the teeth on internal wheel. This recess is to allow space for
the arms or disc of the hand chain wheel which is placed between the two lifting
wheels. This disc, which has on its periphery sunken chambers for the hand
chains, passes down between the two lifting wheels and then follows the internal
shape of the lifting wheel with the recess deeper than the depth of teeth. Upon
this disc an eccentric is fixed or cast & fills the space end ways between the two
lifting wheels. Upon this eccentric a pinion is mounted free to revolve and to
gear with the internal teeth on lifting wheels. To effect this, that part of the
web or disc which is opposite to the full side of the eccentric must be removed to
allow of the pinion passing through the web of the wheel which carries the
eccentric with the pinion upon it.
Thus, if a radial line, larger than that of the outside of pinion is struck from the
centre of the eccentric, and the web or disc cut away to that line to the same
depth as teeth on lifting wheel, the pinion can then be placed on the eccentric,
with some of its teeth projecting through the web of the wheel which carries it;
thus allowing the pinion to gear with the internal teeth on lifting-wheel.
The two lifting wheels & the hand-chain wheel with the eccentric cast on are
bored to the same size, the whole being carried on a central pin which passes
through a frame, this frame being forged or cast in one piece and suspended from
a hook in the usual manner.
Deted this 31st day of March 1896
JAMES SWALWELL.
Improvements in Machinery or Apparatus for Raising and Lowering
Weights.
JAMES SWALWELL 29 Godfrey Road Newport Mon. Manager of Works, 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 object of this invention is to simplify and cheapen the construction of that
class of machinery used for lifting and lowering of weights. And which consists

page_text: '
of two loose lifting wheels and a pinion gearing into the teeth of the lifting wheels.
One of the lifting wheels having one tooth more or less than the other.
The carrying out of my invention shewing its application to a differential pulley
block will be readily understood from the description and drawings herewith.
Fig. 1-is a vertical section.
Fig. 2 is a plan.
Fig. 3-is a side elevation shewing the application of the chains.
The same letters refer to the same parts throughout.
A and C are the lifting wheels the internal toothed wheel on A having one
tooth more than the internal toothed wheel on C the wheel A is made with a recess
deeper than the teeth on internal wheel. This recess is to allow space for the disc
or arms of the hand chain wheel B which carries the eccentric upon which the
pinion D is mounted and gears with the internal wheels on A and C.
The hand chain wheel B has one part of the flange or disc cut away to a radial
line of a larger diameter than pinion and which is struck from the centre of the
eccentric to allow the pinion D to pass on to the eccentric with some of its teeth
projecting through the flange or disc of B sufficiently to allow them to gear with
the teeth of internal wheel on A.
E is the central pin upon which A. B and C are mounted free to rotate.
F is the frame made in one piece through which the central pin E is fitted. The
frame F is also fitted with a hook from which the block is suspended.
HH is the hand chain.
II the lifting chains.
G cross head carrying bottom hook.
To raise the load the chain H is pulled in one direction and in the opposite one
to lower it.
The arrangement of the chains is the same as in other pulley blocks of that class
which consist of two loose lifting wheels and a pinion.
Having now described and particularly ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim as my improvements in that well known class of machinery for raising and
lowering weights and which consists of two loose lifting wheels and a pinion
gearing into the teeth of the lifting wheels are as follows
1. The lifting wheel having a recess deeper than the teeth on internal wheel
for the purpose of allowing space for the disc of hand chain wheel substantially as
herein before described with reference to accompanying drawings.
2. The hand chain wheel with its disc of a form to follow the inside of lifting
wheel with a part of the disc or flange cut away sufficiently to allow some of the
teeth of pinion to project through it and gear with the internal toothed wheel
substantially as hereinbefore described with reference to accompanying drawings.
3. The arrangement and combination with my improvements for the purposes
and use of a differential pulley block the whole working inside a frame made in
one piece substantially as herein before described with reference to accompanying
drawings.
Dated this 10th day of December 1896.
JAMES SWALWELL.