Improvements in or relating to Belt Mounting Devices for Pulleys and the like.
Year: 1898

page_text: Date of Application, 17th May, 1898-Accepted, 18th June, 1898
COMPLETE SPECIFICATION.
Improvements in or relating to Belt Mounting Devices for Pulleys
and the like.
EUGENE FRANÇOIS MICAULT, of 61, Rue de Lourmel, Paris, in the Republic of
France, Engineer, 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 for its object an articulated portable and extremely simple
device for mounting belts on pulleys and the like endling a belt which has fallen or
been taken off to be replaced on its pulley easily and without any danger.
In the accompanying drawings which illustrate the invention by way of example,
Fig. 1 is an elevation of the improved belt mounting device the chain-lines
showing the bent lever in its folded position.
Fig. 2 is a side elevation of Fig. 1.
Fig. 3 a diagrammatic view illustrating the manner of using the apparatus.
Fig. 4 shows a front and side elevation of the stop-wedge.
Fig. 5 is an elevation of a modified construction of the belt mounting apparatus.
Fig. 6 a section on the line 6-6 of Fig. 5.
Fig. 7 an elevation, partly in section on the end-bar.
Figs. 8 and 9 are respectively sections on the lines 8-8 and 9-9 of Fig. 5, and
Fig. 10 is a diagrammatic view of the manner of using the apparatus shown in
Figs. 5 to 9.
The belt mounting apparatus shown in Figs. 1 to 4 comprises a part A formed
preferably in one with a socket A¹ to which is secured the end of a wooden or other
handle B of any desired length. The part A is cut away centrally so as to form a
slot or fork, between the ends of the branches is pivoted a bent lever C carrying a
bar D mounted at right angles to the free end of the lever. A strong spring E
placed in the fork of the part A presses against the heel of the lever C and tends to
prevent its rotation.
When the lever is opened out (Fig. 1) it rests by means of a stop C¹ against the
upper edge of the part A, and thus can be inclined or moved only in one direction.
In order to raise and mount a belt with this apparatus the bent lever C is lowered
and passed below the transmission shaft so as to bring the latter between the lever C
and the part A (Fig. 3). Then the bar D is introduced at the bottom of the curvilinear
angle formed by the periphery of the pulley and by the inner surface of the lower
portion of the belt, if the pulley rotates in the direction of the arrow f. If the pulley
turns in the opposite direction the apparatus must be placed in the other direction so
as to introduce the bar D between the periphery and the inner surface of the upper
portion of the belt. The apparatus having been placed as described the handle B is
pulled or it is swung by pressing it or the part A against the transmission shaft. The
lever C also bears against said shaft and also noves round thus causing the bar D to
move along the circumference of the pulley until the belt resumes its place upon the
pulley as the handle D is moved, as will be easily understood.
In order to avoid the friction of the bar D on the circumference of the pulley and
on the belt which would produce a certain amount of resistance it may be surrounded
by a roller D¹ free to rotate about it.

page_text: In the construction shown in Figs. 5 to 10 the part A which is attached to the
operating rod B consists of a socket formed with a projection A¹ to which the end of
the spring E is secured, say by screws. The lever C is constituted by a T-iron
pivoted in a recess or slot in the socket A and has its flanges removed at this point.
To the web and at the same end of the bent lever C there is secured a cam G per-
forated in the centre so as to afford passage to the hinge pin of said lever the spring E
returns against the straight vertical face of said cam thereby preventing the rotation
of the lever C in a backward direction.
To the free end of the latter there is secured a part D supporting the bar D¹ by
means of which the belt to be raised is operated. This bar is constituted by a rod
secured to the part D on which rod a sleeve D2 provided with a rubber covering and
secured by means of a collar or nut D³ can rotate.
To the bent lever C may be secured by means of a set-screw H¹ a plate H for the
purpose hereinafter specified.
In order to raise a belt with this apparatus the bar D is placed as described in the
preceding case and the plate H is pressed against the shaft (Fig. 10). Then
the handle B is pulled so as to raise the bar D and with it the belt which quickly
and easily resumes its position on the pulley.
In order to perform this operation, care must first be taken to turn the lever
about its hinge and to place the plate H at a distance from the bar D, depending on
the radius of the pulley on which the belt is to be replaced.
The apparatus may be also used as an ordinary belt mounted by not turning down
the lever C and acting directly with the bar D to engage the belt and replace it in the
usual manner.
For this purpose the bent lever C of the second construction, instead of having
somewhat the shape of a swan's neck as in the first example has a more flattened shape
so that the centre of the bar D is on the inside of the axis of the handle B, so that
it does not tend to rotate about its axis during use.
In order to use the apparatus shown in Figs. 1 to 4 as an ordinary belt mounting
apparatus it is necessary to prevent the lever C from turning downwards on its pivot.
To this end there is placed between the lever and the part A a wedge H (Fig. 3)
which engages between the taper flanges of the end of the lever C and the upper
edges of the two branches of the part A. This wedge engages at its lower end in
recesses A2 in the part A and is secured to the lever C by a pin H¹ whereby the lever
is prevented from rotating.
According to the arrangement of transmission gear and pulleys, it may be found
useful to place the bar D to the right or to the left of the lever C. For this purpose
the bar is detachable and can be mounted on either side as desired.
It is advisable to have several bars D of different lengths to suit the different
widths of pulleys.
The pivoted attachment of the lever C in the first construction is effected by
means of a detachable bolt G so as to enable the lever C to be exchanged and replaced
by a smaller or larger one according to the size of the pulleys.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. A belt mounting device comprising a bent lever hinged to a part carrying the
handle of the apparatus and provided at the end with laterally projecting bar which
is caused to engage when the lever is lowered, between the inner surface of the belt
and the periphery of the pulley and which is caused to rise together with the
belt by pressing the lever against the transmission shaft substantially as described.
2. In a belt mounting device of the character described a wedge engaging between
the bent lever and the part on which it is mounted, in order to render the lever rigid
with its support to enable the apparatus to be used as an ordinary belt mounting
device substantially as described.

page_text: 3. In a belt mounting device of the character described the arrangement on the
bent lever of a movable plate adapted to be fixed at any point on the lever to serve
as a fulcrum to the latter on the transmission shaft substantially as described.
4. In a belt mounting device of the character described the use of a spring
opposing to a certain extent the movement of the lever about its pivot and
enabling the apparatus to be used as an ordinary belt mounting device substantially
as described.
5. The combination and arrangement of parts constituting the complete belt
mounting device substantially as described and illustrated in Figures 1 and 2 or in
Figure 5 of the accompanying drawings.