Improvements in Apparatus for Raising and Lowering Weights.
Year: 1893

page_text: Date of Application, 21st Aug., 1893
Complete Specification Left, 28th Apr., 1894-Accepted, 9th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Raising and Lowering Weights.
A communication from abroad by AUGUSTE VERLINDE, of 4, Boulevard Papin,
Lille, France, Mechanician and Manufacturer of Lifting Appliances.
I, JOHN CLAYTON MEWBURN of 55 and 56 Chancery Lane in the County of
London, Chartered Patent Agent, do hereby declare the nature of this invention to
be as follows:-
This invention has reference to apparatus for raising and lowering weights. The
improved apparatus is constructed in such manner that it is perfectly balanced or
equilibrated, that it will hold its load suspended at any point without the aid of
brakes, and that it has two alternative speeds, a slow speed for heavy loads and a
quicker speed for lighter weights.
A characteristic feature of the invention consists of a side disc in which is formed
a hollow spiral screw imparting motion to two toothed pinions placed tangentially
to the screw thread.
An endless chain, which works the apparatus, passes over a chain wheel fixed
upon one end of a shaft which carries keyed to its other extremity the side disc
above mentioned on the inner face of which is formed a hollow spiral screw with
One of these pinions
which gear two toothed pinions an upper and a lower one.
(the lower one) has cast on it a chain wheel which will lift in a continuous manner.
The other pinion can be made fast to a second chain wheel by means of an engaging
device which may consist of a bolt or pin passing through the pinion and entering a
notch or recess cast in the chain wheel; this coupling of the chain wheel with the
pinion allows of lifting small loads with great speed due to the simultaneous
movement of the two chain wheels which together raise the load.
On the other side of the second chain wheel is a notch or recess by which, when
this wheel is disengaged from its pinion, it is made fast to the pulley frame by
means of a bolt or pin working in the said frame and engaging in the notch of the
wheel which is thus made immovable; heavy loads can then be raised by means of
a single chain wheel, a slow speed being thus obtained. The chain which raises
the load passes over both chain wheels and as it is an endless one there can be a
second pulley block and fall at a convenient distance above the first; in this way
when a load has been raised the time occupied in lowering the first hook can
be utilized by raising a load with the second hook which would then be the
lower one.
When it is desired on account of the weight of the load to be raised to have one
or more pulley blocks, one or more loose pulleys can be added to the chain wheels
and an extra turn or two given to the chain.
The disc with hollow spiral screw as hereinbefore described is applicable to other
apparatus for raising and lowering weights.
Dated this 21st day of August 1893.
1101

page_text: Improvements in Apparatus for kalsing and Lowering
A communication from abroad by AUGUSTE VERLINDE, of 4, Boulevard Papin,
Lille, France, Mechanician and Manufacturer of Lifting Appliances.
I, JOHN CLAYTON MEWBURN of 55 and 56 Chancery Lane in the County of
London, Chartered Patent Agent, 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 has reference to apparatus for raising and lowering weights. The
improved apparatus is constructed in such manner that it is perfectly balanced or
equilibrated, that it will hold its load suspended at any point without the aid of
brakes and that it has two alternative speeds- -a slow speed for heavy loads and a
quicker speed for lighter weights.
A characteristic feature of the invention is a side disc in which is formed a spiral
groove which imparts motion to two pinions placed tangentially to the disc.
Figures 1 and 2 are respectively a side elevation and a front elevation of the
apparatus.
Figure 3 is a section on the line 1-2 of Figure 4 which is a plan.
Figure 5 represents the disc and the two pinions above referred to and Figure 6
is a face view of the said disc.
An endless chain C which works the apparatus passes over a chain wheel B
fixed upon one end of a shaft D which carries keyed to its other extremity
the side disc E in the inner face of which is formed a spiral groove with
which gear two pinions G and K on upper and lower shafts F and L respectively.
One of these pinions (the lower one K) has cast on it a chain wheel K¹
which will lift in a continuous manner. The other pinion G can be made fast
to a second chain wheel H by means of an engaging device which may consist
as shown of a bolt or pin J passing through the pinion and entering a notch or
recess cast in the chain wheel H; this coupling of the chain wheel H with the
pinion G allows of lifting small loads with great speed due to the simultaneous
movement of the two chain wheels H and K' which together raise the load.
On the other side of the chain wheel H is a notch or recess by which, when this
wheel is disengaged from its pinion G, it is made fast to the frame A by means of
a bolt or pin which can be slid in the said frame so as to engage in the notch T of
the wheel which is thus made immovable; heavy loads can then be raised by means
M is the chain
of the single chain wheel K' a slow speed being thus obtained.
which raises the load; it passes over both chain wheels G and K' and as it is
endless there can be a second pulley block and fall at O like those at P so that
when a load has been raised the time occupied in lowering the first hook can
be utilized by raising a load with the second hook which would then be the
lower one.
For heavier loads one or more loose pulleys can be added to the chain wheels
and one or more extra turns be given to the chain.
The disc E with spiral groove as herein before described is applicable to other
apparatus for raising and lowering weights.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me and in what manner the same is to be performed, I
declare that what I claim is :-
1. Constructing apparatus for raising and lowering weights, substantially as
hereinbefore described and represented in the annexed drawings.

page_text: 2. In apparatus for raising and lowering weights, the employment of a disc with
spiral groove such as E in combination with pinions to which it imparts motion,
substantially as set forth.
J. C. MEWBURN.