IMPROVEMENTS IN FRICTION APPARATUS FOR COMMUNICATING ROTARY MOTION FROM ONE SHAFT TO ANOTHER
Year: 1881

page_text: LETTERS PATENT to Jacob Walter, of Leadenhall Street, in the City of
"
London, Merchant, for an Invention of IMPROVEMENTS IN FRICTION
APPARATUS FOR COMMUNICATING ROTARY MOTION FROM ONE SHAFT TO
ANOTHER." A communication from abroad by Monteiro Hime & Co., of
Rio de Janeiro, in the Empire of Brazil.
PROVISIONAL SPECIFICATION left by the said Jacob Walter at the Office
of the Commissioners of Patents on the 15th February 1881.
"
JACOB WALTER, of Leadenhall Street, in the City of London, Merchant.
IMPROVEMENTS IN FRICTION APPARATUS FOR COMMUNICATING ROTARY MOTION
FROM ONE SHAFT TO ANOTHER." [A communication from abroad by Monteiro
Hime & Co., of Rio de Janeiro, in the Empire of Brazil.]
"
The object of this apparatus is to enable the speed of a machine worked by
either steam, water, or gas power to be regulated at pleasure without shifting the
driving band.
For this purpose the driving band passes over a pulley on the same axle with a
cone. The latter by means of the friction of an india rubber covered friction
wheel drives a second cone placed parallel with but opposite to the first cone.
Upon the axle of second cone is fixed a pulley from which the machine is driven.
The axle of the friction wheel is free to move longitudinally in its bearings, and is
embraced at one end by the forked end of a bent lever actuated by a treddle fixed
to the machine.
By depressing the treddle the axle, and with it the friction wheel, is moved
longitudinally between the two cones, and the machine in consequence is driven
faster. The friction wheel is made to return to its original position when the
pressure on the treddle is withdrawn by a spring. In this way the friction wheel
can be placed in any desired position (in the direction of its axle) between the
cones; and thus either a faster or slower action of the machine can be produced.
The plumber blocks of the first cone are mounted on a movable axle which can
be turned by a set screw. The cone can consequently be more or less pressed
against the friction wheel.
The apparatus is especially applicable to sewing machines.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Jacob Walter in the Great Seal Patent Office on the 11th August
1881.
JACOB WALTER, of Leadenhall Street, in the City of London, Merchant.
"IMPROVEMENTS IN FRICTION APPARATUS FOR COMMUNICATING ROTARY MOTION
FROM ONE SHAFT TO ANOTHER." A communication from abroad by Monteiro
Hime & Co., of Rio de Janeiro, in the Empire of Brazil.
The object of this apparatus is to enable the speed of a machine worked by
either steam, water, or gas power to be regulated at pleasure without shifting the
driving band.
cone.
For this purpose the driving band passes over a pulley on the same axle with a
The latter by means of the friction of an india rubber covered friction wheel
drives a second cone placed parallel with but opposite to the first cone. Upon the
axle of second cone is fixed a pulley from which the machine is driven.
axle of the friction wheel is free to move longitudinally in its bearings, and is
embraced at one end by the forked end of a bent lever actuated by a treddle fixed
to the machine.
The
By depressing the treddle the axle, and with it the friction wheel, is moved
longitudinally between the two cones, and the machine in consequence is driven
faster. The friction wheel is made to return to its original position when the
pressure on the treddle is withdrawn by a spring. In this way the friction wheel
can be placed in any desired position (in the direction of its axle) between the
cones, and thus either a faster or slower action of the machine can be produced.
The plumber blocks of the first cone are mounted on a moveable axle which
can be turned by a set screw. The cone can consequently be more or less pressed
against the friction wheel.
The apparatus is especially applicable to sewing machines.
In order that the said Invention may be most fully understood and readily carried
into effect I will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan, and Figure 2 is an elevation of friction driving apparatus
constructed in accordance with the Invention.
a is any convenient support, to which is clamped the table b. Upon the table b
there is fixed bearings c, and in these bearings the axis d is able to turn. e, e, are
arms upon the axis d, and these carry another axis f; g is a cone fixed upon the
axis f. The axis d also has an arm d¹ fixed to it, and this is connected with the
table b by the adjusting screw h. By means of this screw an adjustment can be
effected of the distance between the surface of the cone g and that of the cone to
which motion is to be transmitted. is a belt pulley upon the axis f, and by a
driving belt passing around this pulley the cone g is kept constantly in rotation
whilst the apparatus is in use; k, k, are standards fixed upon the table b, in which
are bearings for an axis m. This axis carries the cone n, and also a pulley o to
receive the endless cord by which the sewing machine or other mechanism to be
controlled is driven. q, q, are other standards fixed upon the table b, in which are
bearings for the axis s; this axis is able to slide longitudinally in its bearings.
The sliding motion is imparted to it by means of a fork t which is received between
two collars upon the axis. The fork is carried upon one end of a bell crank lever u
which bas its fulcrum at a¹. The other arm of the lever u is connected by a rod
with a treddle in such manner that as the treddle is depressed the axis & is drawn

page_text: forward. When the treddle is released the axis 8 returns, being drawn back by a
spring a projecting from the support a. v is an india rubber covered wheel carried
upon the axis 8.
The cones g and n are adjusted to such a distance apart that the wheel when
it is between them bears with sufficient pressure upon each to convey the motion
of g to n without slipping.
The speed of the axis m will be greater or less than that of the axis f according
to the position occupied by the wheel v under the control of the operator by means
of the treddle.
Details of the mechanism are shewn by the Figures on Sheet 2 of the Drawings,
these Figures being marked with the letters of reference do not require to be
further described.
Having thus described the nature of the said Invention and the manner of
performing the same, I would have it understood that I claim,-
The friction apparatus, substantially as described, for communicating rotary
motion from one shaft to another, and in varying the speed of rotation by the
means of transmission.
In witness whereof, I, the said Jacob Walter, have hereunto set my hand
and seal, this Twenty eighth day of July, in the year of our Lord One
thousand eight hundred and eighty one.
JACOB WALTER. (L.S.)