IMPROVEMENTS IN APPARATUS FOR STARTING, STOPPING, AND REGULATING THE MOTION OF SEWING, EMBROIDERING, PINKING, AND OTHER MACHINES OR APPARATUS
Year: 1881

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields, in the
County of Middlesex, Gentleman, for an Invention of "IMPROVEMENTS IN
APPARATUS FOR STARTING, STOPPING, AND REGULATING THE MOTION OF
SEWING, EMBROIDERING, PINKING, AND OTHER MACHINES OR APPARATUS."
A communication from abroad by Victor Gustave Jurion, of Lille (Nord), in
the Republic of France.
PROVISIONAL SPECIFICATION left by the said John Henry Johnson at the
Office of the Commissioners of Patents on the 27th January 1881.
JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman. "IMPROVEMENTS IN APPARATUS FOR STARTING, STOPPING, AND
REGULATING THE MOTION OF SEWING, EMBROIDERING, PINKING, AND OTHER
MACHINES OR APPARATUS." A communication from abroad by Victor Gustave
Jurion, of Lille (Nord), in the Republic of France.
This Invention relates to an improved apparatus for starting, stopping, or
regulating the motion of machinery, the said apparatus being applicable to all
machines which are actuated by power, and the speed of which requires to be
suddenly slackened, or the machine stopped instantaneously, such as sewing,
embroidering, pinking machines, and the like.
In carrying out this Invention a brake is employed for controlling the speed of
the machine in combination with an oscillating arm or lever pivotted or suspended
at one extremity on one side of the support or frame of the machine. Motion is
communicated to the machine by means of a suitable driving shaft revolving in
bearings carried by the supports of the machine. A pulley fast on one extremity
of the said shaft is provided for the purpose of receiving motion direct from any
suitable motor, whilst a grooved pulley fast on the opposite extremity of the shaft
serves to transmit this motion by means of a cord or band to an intermediate
pulley with two grooves turning upon a countershaft, the latter being carried by
[Price Gd3

page_text: the oscillating arm or lever.
One of the grooves of the said pulley with two
grooves receives the cord or band hereinbefore described, whilst the other groove
receives a cord or band which serves to transmit motion to the machine.
A forked lever is attached to a pedal by a screw, and serves to cause the
oscillating lever hereinbefore referred to to move towards or away from the driving
shaft. This oscillating lever is provided at about the middle of its length with
two short arms formed with slots which work over headed screws or studs screwed
into the support, and serve to steady the oscillating lever without impeding its
oscillating motion towards and from the driving pulley and stationary brake.
curved blade spring corresponding to a smooth surface formed upon one side of the
intermediate pulley and acting as a brake wheel is attached at one extremity
by two screws to the brake, which in turn is attached to the support of the
machine.
A
The oscillating lever is connected to one extremity of a helical spring, the other
extremity of which is attached to the support. This spring tends to draw the
lever towards the pulley on the driving shaft in one direction, and consequently
slacken the band which transmits motion from the driving pulley to the intermediate
pulley, and at the same time to press the brake wheel on the latter pulley against
the curved blade spring on the brake, thereby reducing the speed or stopping the
machine as required.
When it is desired to start the machine it is simply necessary to apply pressure
upon the extremity of the pedal in a suitable direction, whereby the forked lever
is moved so as to cause the oscillating lever to turn upon its pivot and move the
intermediate pulley away from the stationary brake and driving pulley (thereby
tightening the band transmitting motion to the intermediate pulley) so that the
brake wheel only touches the free extremity of the blade spring. The speed of the
machine may then be increased by applying more pressure on the pedal so as to
still further tighten the band and move the brake wheel altogether out of contact
with the stationary brake and spring.
In order to diminish the speed of the machine the movements hereinbefore
described must be reversed, that is to say, the pressure must be gradually removed
from the pedal, whereupon the helical spring draws the oscillating lever so as to
produce friction between the extremity of the curved blade spring on the brake
and the brake wheel, whilst at the same time the band transmitting motion to the
intermediate pulley is slackened by degrees until it is only capable of making one,
two, or three stitches as required. In order to stop the machine instantaneously
when running at its highest speed it is sufficient to quickly withdraw the pressure
applied by the foot from the pedal, whereupon the helical spring suddenly acts
upon the oscillating lever and presses the brake wheel on the intermediate pulley
against the blade spring and the stationary brake. Hence it is evident that the
machine may in all cases be started or stopped suddenly or gradually at pleasure,
and that all jerks or shocks are prevented.
It is also evident that the apparatus is capable of a great variety of applications,
and that it may be adapted to machines of all descriptions employed for any
purpose.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Henry Johnson in the Great Seal Patent Office on the
26th July 1881.
JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman. "IMPROVEMENTS IN APPARATUS FOR STARTING, STOPPING, AND
REGULATING THE MOTION OF SEWING, EMBROIDERING, AND OTHER MACHINES OR
APPARATUS." A communication from abroad by Victor Gustave Jurion, of Lille
(Nord), in the Republic of France.
The said Invention relates to improvements in apparatus for starting, stopping,
or regulating the motion of machinery, the said apparatus being more particularly
applicable to machines which are actuated by power, and the speed of which
frequently requires to be suddenly slackened or the machine stopped instantaneously,
such as is the case in sewing, embroidering, and pinking machines, and the like.
Machines of this class are usually driven at a high rate of speed, and it is
occasionally necessary to suddenly reduce the speed or stop the machine instanta-
neously according to the nature of the work. This Invention enables these
conditions to be complied with in a practical manner.
And in order that the said Invention may be fully understood, I shall now
proceed more particularly to describe the same, and for that purpose shall refer to,
the several Figures on the annexed Sheet of Drawings, the same letters of reference
indicating corresponding parts in all the Figures.
Figure 1 of the accompanying Drawings is an end elevation, and Figure 2 a
front elevation of the apparatus applied to the stand or framing of a sewing or
other analogous machine.
The apparatus is constructed with a stationary brake P hereinafter described in
combination with an oscillating arm or lever K pivotted or suspended at L to the
stand B of a sewing or other machine not shewn in the Drawing. Motion is
communicated to the machine by means of a shaft E revolving in bearings D
carried by the stand or support B, a pulley F fast on one extremity of the said
shaft being provided for the purpose of receiving motion direct from any suitable
motor, whilst a grooved pulley G fast on the opposite extremity of the shaft serves
to transmit this motion by means of a cord or band Y to an intermediate pulley H
turning upon a stud D' carried by the lever K. The pulley H is provided with
two grooves, one of which receives the cord or band Y, whilst the other groove
receives a cord or band Z serving to transmit the motion directly to the machine.
A lever M is attached to a pedal N.by a screw H' (Figure 2), and serves to
cause the lever K to swing or oscillate upon the point of suspension L. This
lever K is provided at about the middle of its length with two short arms O formed
with slots O¹ which work over guide pins I screwed into the side of the stand B
and serve to steady the said-lever without impeding its oscillating motion towards
and from the driving pulley G and stationary brake P. A curved blade spring R
corresponding to the periphery of a brake wheel W arranged at one side of the
intermediate pulley H is attached at one extremity by two screws S to the brake P,
which in turn is attached to the stand or support B.
The lever K is connected to one extremity of a counter spring T, the other
extremity of which is attached to the stand B. This counter spring tends to draw
the lever K towards the pulley G in the direction indicated by the arrow T¹,
thereby slackening the band Y, and at the same time pressing the brake wheel W
against the spring R on the brake P in such a manner as to reduce the speed or
stop the machine as required.
In order to start the machine it is simply necessary to apply pressure by the foot,
for example, at N' upon the extremity of the pedal N in the direction indicated by

page_text: the arrow U, whereby the lever M is moved in the direction indicated by the
arrow V so as to cause the lever K to turn upon its pivot L and move the
intermediate pulley H in the direction indicated by the arrow V or away from
the stationary brake Pand driving pulley G (thereby tightening the band Y) so that
the brake wheel W lightly touches the blade spring R at its extremity x.
The
- speed of the machine may then be increased at will by applying more pressure on
the pedal N so as to still further tighten the band Y and move the brake wheel W
altogether out of contact with the spring R on the brake.
When it is required to diminish the speed of the machine the movements
hereinbefore described must be reversed, that is to say, the pressure must be
gradually removed from the pedal N, whereupon the counter spring T draws the
lever K in the direction indicated by the arrow T¹ so as to produce friction between
the extremity of the spring R and the periphery of the brake wheel W, whilst
at the same time the band Y is slackened by degrees until the speed of the machine
is reduced to the required extent. In order to stop the machine altogether and
instantaneously when running at its highest speed it is sufficient to quickly
withdraw the pressure from the pedal N, whereupon the counter spring T
immediately acts upon the oscillating lever K, presses the brake wheel W against
the spring R on the brake P, and slackens the band Y. Hence it is evident that
the machine may at any moment be started or stopped suddenly or gradually, and
its speed regulated at pleasure, and that all jerks or shocks are obviated.
It is also evident that the apparatus is capable of a great variety of applications,
and that it may be adapted to machines of all descriptions employed for any
purpose.
Having now described and particularly ascertained the nature of the said
Invention, and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what I consider to be novel and original,
and therefore claim as the Invention secured to me by the hereinbefore in part
recited Letters Patent is,--
First. The improved arrangement of apparatus for starting and stopping sewing
and other similar machines constructed and operating substantially as herein before
described and illustrated in the accompanying Drawings.
Secondly. The employment for regulating the speed of machinery of the brakeing
apparatus constructed as hereinbefore set forth with an oscillating lever carrying
the intermediate or driving pulley in such a manner that the band imparting
motion to the said pulley is rendered capable of being tightened or slackened at
will, substantially as herein before described and illustrated in the accompanying
Drawings.
In witness whereof, I, the said John Henry Johnson, have to this my.
Specification set my hand and seal, this Twenty fifth day of July, One
thousand eight hundred and eighty one