An Improved Mechanical Motion, being a Lever having a Shifting Fulcrum.
Year: 1889

page_text: Date of Application, 21st June, 1889
Complete Specification Left, 25th Feb., 1890-Accepted, 5th Apr., 1890
PROVISIONAL SPECIFICATION.
An Improved Mechanical Motion, being a Lever having a Shifting
Fulcrum.
I, ALBERT LOUIS GABRIEL GAUTTARD, of 33, Rue des Vinaigriers, Paris, France,
Professor of Drawing, do hereby declare the nature of this invention to be as
follows:-
My Invention consists of a combined lever and pulley together constituting a lever
having a shifting fulcrum.
P
In the accompanying drawings, I have illustrated several examples of the modes of.
application of my Invention and the purposes for which it is employed; and in.
figure 1 it consists of a lever suspended by means of a cord attached to the lever at
two points A B and passing over a pulley D hung from a fixed point, the power
being applied at point C and the load at R. Figure 2 represents the positions of the
different parts of the apparatus when the point C is lowered. Figures 3 and 4 shew
different forms of the lever. Figure 5 shews the cord or chain provided with an eye J
on one member through which the end A of the lever is passed (as in figure 6) the
other end being attached by a hook or swivel. Figures
to 14 illustrate various
applications of the apparatus.
Owing to the shifting motion of the fulcrum the leverage is increased as the long
end of the lever, to which the power is applied, is drawn down so that the same
power P will overcome a load more easily the farther the lever is moved. This result
is attained by supporting the lever at two points A B by means of the cord FF passing
over a pulley D, as above mentioned, the effect being similar to that which would be
attained by a fulcrum movable along the lever towards the end A as the end C is
depressed so that the short arm of the lever gradually diminishes, while the long arm
increases, in length whereby the same power may be made to overcome a gradually-
increasing load or resistance.
Such an apparatus is capable of many applications. For instance, a sick person
by its aid, may lift any part of his body, or patients who can only be attended to at
long intervals, be enabled to shift their positions as often as they desire and this with
the greatest ease so as to avoid any violent movements. It would also be especially
useful for persons paralysed in one arm or leg, the apparatus being in this case
operated by a handle or treadle. The apparatus is also generally applicable for lifting
weights, such as for military and naval use, bridge building, mounting heavy guns
in batteries, as well as for handling large projectiles. If a horse happened to fall
while harnessed to a vehicle, he may also be raised by means of this apparatus provided
it be slung from a jib or other support, as shewn in figure 12.
In figure 3, the point of attachment B of the cord is about the mid length of the
lever AC, the end A being cleft to facilitate the passage of the lifting cord and a
ring or eye being fixed at point B to which is attached the swivel B' of cord F. C is
a groove for the attachment of a cord C¹ provided with a hand pull.
In figure 14 the knot A¹ is generally provided with a cross pin of spherical enlarge-
ment serving as a stop to abut against the cleft end A of the lever, when the part A G
of the lifting cord is engaged therein. The ends of the cords are furnished with swivels
or S hooks, the hook G being capable of swivelling to allow of the load rotating when
the lever is held stationary

page_text: In figure 5 the cord is provided at A' with an eye J to receive the end A of
the lever (figure 4) the eye being formed by a thimble around which the cord
is passed and spliced above the thimble, the pendent part being simply twisted
as shown.
That 2:01
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1000
A. L. G. GAUTTARD.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
An Improved Mechanical Motion, being a Lever having a Shifting
Fulcrum.
I, ALBERT LOUIS GABRIEL GAUTTARD, of 33, Rue des Vinaigriers, Paris, France,
Professor of Drawing, 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 :--
My Invention consists of a combined lever and pulley together constituting a lever
having a shifting fulcrum.
In the drawings accompanying my Provisional Specification 1 have illustrated
several examples of the modes of application of my invention and the purposes for
which it is employed. In figure 1, it consists of a lever suspended by means of a cord
attached to the lever at two points A B and passing over a pulley D hung from a
fixed point, the power P being applied at point C and the load at R. Figure 2
represents the positions of the different parts of the apparatus when the point C is
lowered. Figures 3 and 4 shew different forms of the lever. Figure 5 shews the
cord or chain provided with an eye J on one member through which the end A of the
lever is passed (as in figure 6) the other end being attached by a hook or swivel.
Figures 7 to 14 illustrate various applications of the apparatus.
Owing to the shifting motion of the fulcrum the leverage is increased as the long
end of the lever, to which the power is applied, is drawn down so that the same
power P will overcome a load more easily the farther the lever is moved. This result
is attained by supporting the lever at two points A B by means of the cord FF
passing over a pulley D as above mentioned, the effect being similar to that which
would be attained by a fulcrum movable along the lever towards the end A as the
end C is depressed so that the short arm of the lever gradually diminishes, while the
long arm increases, in length whereby the same power may be made to overcome a
gradually increasing load or resistance.
Such an apparatus is capable of many applications. For instance, a sick person,
by its aid, may lift any part of his body; or patients, who can only be attended to
at long intervals, be enabled to shift their positions as often as they desire and this
with the greatest ease so as to avoid any violent movements. It would also be especially
useful for persons paralysed in one arm or leg, the apparatus, in this case, being
operated by a handle or treadle.
The apparatus is also generally applicable for lifting weights, such as for military
and naval use, bridge building, mounting heavy guns in batteries, as well as for
handling large projectiles. If a horse happen to fall while harnessed to a vehicle, he
may also be raised by means of this apparatus, provided it be slung from a jib or other
support, as shewn in figure 12.
In figure 3, the point of attachment B of the cord is at about the mid-length of
the lever AC, the end A being cleft, to facilitate the passage of the lifting cord, and
a ring or eye being fixed at point B to which is attached the swivel B₁ of cord F¹.
C is a groove for the attachment of a cord C¹ provided with a hand pull.

page_text: In figure 14, the knot A¹ is generally provided with a cross-pin or spherical
enlargement, serving as a stop to abut against the cleft end A of the lever when the
part A¹ G of the lifting cord is engaged therein. The ends of the cord are furnished
with swivels or S-hooks, the hook G being capable of swivelling, to allow of the load
rotating when the lever is held stationary."
In figure 5, the cord is provided, at A¹, with an eye J to receive the end A of the
lever (figure 4) the eye being formed by a thimble around which the cord is
passed and spliced above the thimble, the pendent part being simply twisted,
as shewn.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, 1 declare that what
I claim is;
A. lever, having a shifting fulcrum constituted by a lever coupled to a pulley by a
cord or chain attached to the lever at two points and passing round the
pulley mounted on a fixed point whereby the same power is able to overcome
a gradually increasing load or resistance the farther the lever is moved, all as
herein before described.
1000
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A. L. G. GAUTTARD.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.