Year: 1899

page_text: Date of Application, 14th Dec., 1899-Accepted, 23rd June, 1900
We, JOHN PETER MATHIEU, of 1605, Allegheny Avenue, in the City of
Philadelphia, State of Pennsylvania, United States of America, Leather Manu-
facturer. and WILLIAM HENRY LUCAS, and FREDERICK HENESS GLIEM. both of
1037, Ridge Avenue, in said City of Philadelphia, Machine Builders, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
This invention relates to that class of frictional driving mechanism in which
two shafts are arranged at right angles to each other, each shaft having a disc
and one of these discs having peripheral contact with the face of the other disc
so that, by moving the first named disc across the face, towards and from the
axis, of the other disc the speed of the driven disc is varied.
The object of this invention is to provide such a mechanism in which the
degree of pressure between the two discs can be readily regulated.
We will describe our invention with reference to the accompanying drawing,
in which-
Figure represents, partly in elevation and partly in section, a frictional
driving mechanism constructed in accordance with our invention;
Figure 2 is a transverse section on the line aa Figure 1; and
Figures 3 and 4. are sections illustrating modifications of the invention.
1 and 2 represent shafts at right angles to each other, either of which shafts
may be the driver, and the other the driven, shaft.
In the present instance we will presume that the shaft 1 is the driver and that
the shaft 2 is the one to be driven.
The said shaft 2 has splined upon it a disc 3, which can be moved longi-
tudinally in either direction on the shaft, by any suitable shifting device the
disc 3 being preferably provided with a grooved hub 4 for the engagement of
the said shifting device.
The shaft 1 carries a disc 5 the face of which is in contact with the periphery
of the disc 3. The said disc 5 is mounted upon the shaft 1 so that it can have
a slight amount of longitudinal play thereon, but cannot turn independently of
the shaft, this being effected by means of a spline 6, in the example illustrated.
The end of the shaft 1 is tubular and contains a coiled spring 7 which bears
upon a block 8, the latter being free to slide in the tubular end of the shaft 1.
but being preferably prevented from turning therein by reason of its square, or
other non-circular shape, or by any other suitable form of retaining device.
Bearing upon this block is a screw stem 9 which screws into a threaded axial
opening in the disc 5 so that by turning this screw stem 9 in one direction, or
the other, the tension of the spring 7 is varied and the face of the disc 5 is
caused to press, with any desired degree of force, against the periphery of the
disc 3, so that the power transmitting property of the discs may be varied to

page_text: accord with the character of the work to be performed, and ready compensation
for wear of either disc may be effected.
As both end bearings of the spring 7 rotate with the shaft 1, there is no wear
by friction upon the spring as there would be if it bore at one end upon a
rotating part and at the other end upon a fixed part.
Where simple adjustment of the disc 5 upon the shaft 1 is desired without
any provision for imparting yielding pressure to the disc the construction shewn
in Figure 3 may be employed, that is to say, the screw stem 9 may simply bear
upon the end of the shaft 1.
In Figure 4 is shewn a construction in which the adjusting screw simply
turns in the disc 3 without moving longitudinally in respect thereto, the screw
having a collar 10 fitting in a countersink at the inner end of the axial opening
of the disc and the threaded stem of the screw acting upon a nut 11 which is
free to slide in the opening in the end of the shaft 1. When this construction
is employed there will be no projection of the outer end of the screw stem 9
beyond the face of the disc 5 in any position of adjustment of the nut 8.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:
-
1. The combination in a frictional driving mechanism of a pair of shafts at
right angles to each other, one of the said shafts being a driving shaft and the
other a driven shaft, a pair of discs carried by the said shafts, one disc having
face contact with the periphery of the other disc and means for mounting the
said face contact disc upon its shaft so that it is longitudinally adjustable thereon
to compensate for wear of the discs, or regulate the pressure of one upon the
other substantially as hereinbefore described.
2. The combination in a frictional driving mechanism of a pair of shafts at
right angles to each other, one of the said shafts being a driving shaft and the
other a driven shaft, a pair of discs carried by the said shafts, one of the said
discs being longitudinally adjustable upon its shaft and having face contact
with the periphery of the other disc and a spring for forcing the said face con-
tact disc outwardly, or into contact with the periphery of the other disc sub-
stantially as herein before described.
3. The combination in a frictional driving mechanism of a pair of shafts at
right angles to each other, one of the said shafts being a driving shaft and the
other a driven shaft, a pair of discs carried by the said shafts, one of the said
discs being longitudinally adjustable upon its shaft and having face contact
with the periphery of the other disc, and a spring acting on the said face con-
tact disc so as to press the same into contact with the periphery of the other disc,
one end of the said spring having a bearing on the rotating shaft and the other
on a rotating part carried by the disc substantially as herein before described.
4. The combination in a frictional driving mechanism of a pair of shafts
at right angles to each other, one of the said shafts being a driving shaft and
the other a driven shaft, a pair of discs carried by the said shafts, one of the
said discs being longitudinally adjustable upon its shaft and having face contact
with the periphery of the other disc, a spring for forcing the said face contact
disc outwardly, or into contact with the periphery of the other disc, and means
for varying the tension of the said spring, substantially as herein before described.
5. The combination in frictional driving mechanism of a pair of shafts at
right angles to each other, one of the said shafts being a driving shaft and the
other a driven shaft, a pair of discs carried by the said shafts, one of said discs
being longitudinally adjustable upon its shaft and having face contact with
the periphery of the other disc, a spring contained in a recess in the end of the
shaft which carries the face contact disc, a block free to slide in the said recess,
and bearing upon the spring, and a set screw engaging with the disc and block
and serving to adjust the latter, substantially as hereinbefore described.

page_text: 6. The combination in frictional driving mechanism of a pair of shafts at
right angles to each other, one of the said shafts being a driving shaft and the
other a driven shaft, a pair of discs carried by the said shafts, one of said discs
being longitudinally moveable on its shaft and having face contact with the
periphery of the other disc, a spring contained in a recess in the end of the
shaft which carries the said face contact disc, a nut bearing upon the said spring,
and a screw stem carried by the disc and engaging the said nut, substantially
as herein before described.
7. The several improvements in frictional driving mechanism herein before
described and illustrated in Figures 1 and 2, Figure 3 and Figure 4 of the
accompanying drawings.
Dated this 14th day of December 1899.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.