Year: 1897

page_text: I, JULES AUGUSTE GUSTIN, of Deville sur Meuse (Ardennes) in the Republic of
France, do hereby declare the nature of this invention to be as follows:-"
The invention relates to an arrangement of differential tackle enabling the chain
carrying the hook supporting the weight to be acted upon directly, when no load is
suspended so as to bring the hook very rapidly to the desired level.
My invention consists in principle, in mounting the pulleys of the tackle in an
independent manner on the axle carrying them, and in arranging on their adjacent
faces helicoidal cams or inclines so that the engagement of the pulleys and of the
driving wheel is produced by wedge action obtained by the action of the weight of
the load and the disengagement is effected when no charge is suspended, by acting
upon the large pulley in the contrary direction to that of the load.
In order that the invention may be clearly understood I have in the accompanying
drawings represented an example of the application of my invention to that class of
tackle provided with a worm and worm wheel. Fig. 1 is a front view, Fig. 2 an
edge or side view in the position of disengagement. Fig. 3 is a similar view to
Fig. 2 but in the position of engagement. Figures 4, 5 and 6 are detail views
showing by front and edge views the arrangement of helicoidal cams or inclines of
the driving wheel and pulleys.
In all the figures like parts are indicated by similar letters of reference.
In my new arrangement of tackle, the two differential pulleys ab are completely
independent and are mounted loosely on the axle c carrying them.
The pulleys a and b may be single as shown in the drawings or they may have
two or more grooves of different diameters like ordinary differential pulleys,
provided that each pulley be furnished with similar cams to those shown in the
drawings.
The driving wheel d which is acted upon by the worm e is also loose on the
shaft c.
The pulley b and the wheel d bear at each end, the one on an enlargement or
collar of the axle of the tackle, the other on a nut forming an abutment, and the
pulley a, on the contrary, is capable of being moved along the axle c between the
wheel d and the pulley b.
The large pulley a has on its two sides one, two or several helicoidal cams or
inclines g h with which correspond the cams or inclines i jarranged on the adjacent
sides of the driving wheel & and the pulley b.
These different helicoidal cams or inclines are arranged so that by the action of
the load suspended by the lower hook k the pulley a, caused to turn in the contrary
direction to the pulley b, is pushed by the helicoidal cam or incline i from the
wheel d towards the pulley 6 and the cam or incline h locks with the cam or
inclinej of the latter, the two pulleys ab are thus locked together, further the
weight of the load has the effect of holding the cam or incline g constantly applied
to the cam or incline i, in such manner that the pulley a always turns with the
wheel d.

page_text: The working of my improved tackle is similar to that in ordinary use.
By acting upon the driving chain in the direction of the arrow, the cam or
incline i pressing against the cam or incline g of the pulley a carries the latter with
it by friction in its rotary motion (Fig. 3) and the raising of the weight is effected
as with the ordinary differential tackle.
If the driving chain is pulled in the contrary direction, the cam or incline g
moving in the contrary direction permits the palley a to turn by the action of the
weight of the load, and the descent of the load is thus effected without any effort
on the part of the workman.
With the ordinary tackles when it is required to lower the load, the workman has
always to overcome the resistance due to the friction of the chain upon the pulleys and
this resistance is consequently greater in proportion as the weight is heavier; with
my arrangement, on the contrary, the workman, whatever may be the weight of the
load, has always to overcome only a very slight resistance, because he has only to
turn the driving wheel, which has no effort to overcome.
The load being brought to the desired point is removed from the hook k, to bring
back the latter to the height of the new load to be moved, it is only necessary to
turn the pulley a in the opposite direction to that of the arrow represented in the
drawing; the cam or incline h then slides against the cam or incline j of the pulley b
and this latter forces the pulley a to move towards the left, which action causes the
disconnection of the two pulleys (Fig. 2).
The pulley b being rendered independent of the pulley a, the workman can then
directly rotate the lower or running pulley without the intervention of the
differential, which enables him very rapidly to bring the hook k to the desired level,
by causing it to rise or fall.
My arrangement therefore has the two following advantages.
1. A great rapidity of operation to bring the empty hook to the desired
point.
2. A great smoothness of working to lower loads.
My invention is applicable to differential tackle of all kinds, whatever may be
their method of driving, the dimensions and accessory arrangements of my improved
tackle being modified according to circumstances.
Da 100 Doomben 1907
An Improved Differential Tackle.
I, JULES AUGUSTE GUSTIN, Junior, Engineer, of Deville sur Meuse (Ardennes), in
the Republic of France, 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 invention relates to an arrangement of differential tackle enabling the chain
carring the hook supporting the weight to be acted upon directly, when no load is
suspended, so as to bring the hook very rapidly to the desired level.
My invention consists, in principle, in mounting the pulleys of the tackle in an
independent manner on the axle carrying them, and in arranging on their adjacent
faces helicoidal cams or inclines so that the engagement of the pulleys and of the
driving wheel is produced by wedge action obtained by the action of the weight of
the load and the disengagement is effected, when no charge is suspended, by acting
upon the large pulley in the contrary direction to that of the load.

page_text: In order that the invention may be clearly understood I have in the drawings
accompanying my provisional specification represented an example of the applica-
tion of my invention to that class of tackle provided with a worm and worm wheel.
Figure 1 is a front view, Figure 2 an edge or side view in the position of dis-
engagement. Figure 3 is a similar view to Figure 2 but in the position of engage-
ment. Figures 4, 5 and 6 are detail views showing by front and edge views the
arrangement of the helicoidal cams or inclines of the driving wheel and pulleys.
In all the figures like parts are indicated by similar letters of reference.
In my new arrangement of tackle, the two differential pulleys ab are completely
independent and are mounted loosely on the axle c carrying them. The pulleys a
and b may be single as shown in the drawings or they may have two or more grooves
of different diameters like ordinary differential pulleys, provided that each pulley be
furnished with similar cams to those shown in the drawings.
The driving wheel d which is acted upon by the worm e is also loose on the
shaft c.
The pulley b and the wheel d bear at each end, the one on an enlargement or
collar of the axle of the tackle, the other on a nut forming an abutment, and the
pulley a, on the contrary, is capable of being moved along the axle c between the
wheel d and the pulley b.
The large pulley a has on its two sides or faces one, two or several helicoidal
cams or inclines g h with which correspond the cams or inclines i ; arranged on
the adjacent sides or faces of the driving wheel & and pulley b.
These different helicoidal cams or inclines are arranged so that by the action of
the load suspended by the lower hook k, the pulley a, caused to turn in the
contrary direction to the pulley b, is pushed by the helicoidal cam or incline i
from the wheel d towards the pulley b and the cam or incline h locks with the
cam or incline ; of the latter, the two pulleys a and b are thus locked together,
further the weight of the load has the effect of holding the cam or incline g con-
stantly applied against the cam or incline i, in such manner that the pulley a
always turns with the pulley d.
The working of my improved tackle is similar to that in ordinary use.
By acting on the operating chain
intermediary of the pulley m, to the
to the driving wheel d.
rotary motion is communicated, by the
endless screw e which latter gives motion
By pulling upon the driving chain in the direction of the arrow, the cam or
incline pressing against the cam or incline g of the pulley a carries the latter
with it by friction in its rotary motion (Figure 3) and the raising of the weight is
effected as with the ordinary differential tackle.
If the driving chain is pulled in the contrary direction, the cam or incline g
moving in the contrary direction permits the pulley a to turn by the action of the
weight of the load, and the descent of the load is thus effected without any effort
on the part of the workman.
With the ordinary tackles when it is required to lower the load, the workman
has always to overcome the resistance due to the friction of the chain upon the
pulleys and this resistance is consequently greater in proportion as the weight is
heavier; with my arrangement, on the contrary, the workman, whatever may be
the weight of the load, has always to overcome only a very slight resistance because
he has only to turn the driving wheel, which has no effort to overcome.
The load being brought to the desired point is removed from the hook k. To bring
back the latter to the height of the new load to be moved, it is only necessary to pull
on that part of the chain marked n. so as to turn the pulley at in the opposite direction
to that of the arrow represented in the drawing; the cam or incline h then
slides against the cam or incline j of the pulley b and this latter forces the
pulley a to move towards the left, which action causes the disconnection of the two
pulleys (Figure 2).
The pulley b being rendered independent of the pulley a, the workman can then
directly rotate the lower running pulley without the intervention of the differential,

page_text: which enables him very rapidly to bring the book k to the desired level, by causing
it to rise or fall.
My arrangement therefore has the two following advantages: :-
1. A great rapidity of operation to bring the empty hook to the desired point.
2. A great smoothness of working to lower loads.
My invention is applicable to differential tackle of all kinds, whatever may be their
method of driving the dimensions and accessory arrangements of my improved tackle
being modified according to circumstances.
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. An arrangement of differential tackle characterised by the fact that the
differential pulleys a and b are mounted, on the axis which carries them,
independently of each other, and are provided on their adjacent faces with
helicoidal cams whilst similar cams are also provided on the adjacent faces of
the driving wheel d and pulley a, so as to effect the coupling of the pulley a
with the driving wheel by wedging or friction and with the pulley by locking
or gearing under the action of the weight of the load, this locking or gearing
ceasing and consequently the pulley b being disengaged in view of the rapid
descent or ascent of the hook, when the pulley a is caused to turn in a direction
opposite to that of the rotation determined by the action of the load.
2. In differential tackle the combination of a suitable frame f, axle c, driving
wheel d, endless screw e, pulley m, operating chain l, differential pulleys a band
chain passing around the latter, the said driving wheel d and differential
pulleys ab being loose on the axle c and provided with coacting helicoidal inclines
or cams g h i j on their faces or sides the whole operating in manner as herein
described and for the purpose stated.
921
CT
1000
5433U THID
Line ra fon ma
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.