Improvements in or relating to Motors for Operating Sewing Machines and the like.
Year: 1890

page_text: Date of Application, 12th Sept., 1890
Complete Specification Left, 13th May, 1891-Accepted, 15th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Motors for Operating Sewing
Machines and the like.
I, LOUIS EYNARD of 2 Rue Anthony Paris in the Republic of France,
Mechanic, do hereby declare the nature of this invention to be as follows:-
The motor mechanism is enclosed in a box closed at its ends by two covers each
provided with lugs by which the motor may be fixed to the underside of the table
by means of screws-or the like.
A coiled spring is contained in a spring-box or case and one of its extremities is
fixed to a shaft (herein termed the spring shaft) and the other to the wall of the
sp; ing-box which is mounted loosely on the said shaft. The spring-box at one side
carries an internally toothed wheel or ring which gears with a pinion preferably
cast in one with another wheel which gears with a pinion similarly cast in one with
another wheel which transmits the movement to a pinion keyed or otherwise
secured to one end of the driving shaft carrying at its other extremity a grooved
driving-wheel which transmits motion from the motor to the machine to be operated
by a band or other equivalent means; the wheels and pinions mentioned above are
all loose on their respective shafts excepting the pinion secured on the driving
shaft. The spring-shaft rotates in bearings formed in the two covers and on each
of its extremities is secured a grooved pulley. Two arms designated by the name
of stirrup-levers are forked at their upper ends where they are pivotted on the
spring-shaft and between the two cheeks or prongs of each arm is one of the before-
mentioned grooved pulleys. On each of the stirrup-levers is a spring-controlled
catch or pawl the free end of which engages in the groove of one of the pulleys.
Each of the before mentioned covers has also pivotted on it a catch or pawl, the
free end of which engages in the same manner in the groove of one of the pulleys.
To one of the covers is fixed a bracket or support terminating at its extremity in
a socket and carrying an arm to which is jointed a lever by which the brake of the
motor is controlled or operated.
To the front of the box may be secured a fork each of the prongs of which
terminates in a lug which like the lugs on the box-covers may be fixed to the
table.
The motor operates as follows;―
The operator applies his feet to the stirrup-levers which may preferably each
terminate in a loop, for the reception of the feet, and pushes on cach of them either
alternately or simultaneously so that by means of the catches or pawls carried on
the stirrup-levers both the grooved pulleys and the spring-shaft on which they are
secured will be rotated and the spring will be coiled around the shaft and will
impart rotary motion to the spring-box. The two motions namely that of the
spring-shaft and that of the spring-box are independent of each other these being
connected by the spring. The catches or pawls on the covers prevent backward
rotation of the shaft after each movement of the stirrups. The pressure which the
spring thus coiled around its shaft exercises on the spring-box is transmitted to the
machine by means of the gearing above described. This movement is checked by
means of a brake which is described further on, and which the operator works
by the aid of the before mentioned brake lever on which he exercises a pressure
with his knee in proportion to the speed with which he desires the machine to
work. This brake both moderates or retards the speed and stops the machine,
and is constructed with a cup which is carried by the before-mentioned bracket, a
socket which is rotated with the driving shaft by means of a pin which can be
moved longitudinally in a slot in the said shaft, a disc which serves as the retarding

page_text: medium by being pressed against the interior of the before-mentioned cup and a
preferably coned sleeve which serves for stopping the machine by being pressed
into frictional contact with the cup. Springs tend always to hold in their
inoperative positions the disc and sleeve which are both mounted so that they may
be moved longitudinally towards the cup when the brake lever is moved by the
knee of the operator. Such a movement of the brake lever communicates motion
to the socket on the shaft and in turn to the sleeve by means of one of the springs.
The outer face of the disc is plain and comes into contact with the correspondingly
plain face of the cup which is stationary, the friction caused thereby retards the
rotation of the driving shaft, the brake in this case acting as a moderator. If the
operator desires to stop the machine he has only to move the brake lever further
so that the exterior conical face of the sleeve which until then has remained apart
from the cup will come into contact with the correspondingly internally coned
surface of the stationary cup against which it is pressed by one of the springs
which action will stop the machine immediately.
In order
When the motor is thus stopped the brake lever is retained by means of a
catch or pawl pivotted to it, and which during the pushing of the said lever moves
over a preferably inclined plane provided with a recess or notch and with a stud or
pin projecting up from the bottom of the said recess. When the brake is being
moved so as to stop the machine the catch or pawl on the brake lever slides along
the inclined plane and its free end descends into the notch which arrests it and thus
retains the lever in the position necessary to keep the machine at rest.
to start the machine again it is sufficient to give a sharp blow to the brake lever
so that the back of the catch will strike against the stud or pin in the recess or
notch which raises the free end of the catch or pawl and in consequence releases
it from the recess; on account of the instantaneousness of the movement and by
the action of the springs the brake lever returns to its inoperative position, thus
withdrawing the parts of the brake out of frictional contact and allowing the
machine to operate at the desired speed.
Dated this 12th day of September 1890.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Motors for Operating Sewing
Machines and the like.
I, LOUIS EYNARD of 2 Rue Anthony Paris in the Republic of France,
Mechanic, 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 :-
The invention will be best understood by reference to the accompanying drawings
in which
Fig. 1 is a vertical section,
Fig. 2 a side elevation and
Fig. 3 a plan of the motor and
Fig. 4 is a detail view of portion of the brake mechanism thereof.
Like letters indicate like parts throughout the drawings.
The motor mechanism is enclosed in a box A closed at its ends by two
covers B B each provided with lugs C C¹ by which the motor may be fixed to
the underside of the table by means of screws or the like.
A coile spring D is contained in a spring-box or case E and one of its
extremities is fixed to a shaft F (herein termed the spring shaft) and the other
to the wall of the spring-box E which is mounted loosely on the said shaft F.
The spring-box E at one side carries an internally toothed wheel or ring G which
gears with a pinion H preferably cast in one with another wheel I which gears

page_text: with a pinion J similarly cast in one with another wheel K which transmits the
movement to a pinion L keyed or otherwise secured to one end of the driving
shaft M carrying at its other extremity a grooved driving-wheel N which transmits
motion from the motor to the machine to be operated by a band or other equivalent
means; the wheels and pinions mentioned above are all loose on their respective
shafts excepting the pinion L secured on the driving shaft M. The spring-
shaft rotates in bearings formed in the two covers B B' and on each of its extremities
is secured a grooved pulley O O¹. Two arms P P designated by the name of
stirrup-levers are forked at their upper ends where they are pivotted on the spring-
shaft F and between the two cheeks or prongs of each arm is one of the before-
mentioned grooved pulleys. On each of the stirrup-levers P P is a catch or
pawl QQ the free end of which is pressed into engagement with the groove
of one of the pulleys 001 by a spring R or R. Each of the before mentioned
covers B B has also pivotted on it a catch or pawl S S' the free end of which
engages in the same manner in the groove of one of the pulleys O O¹.
To the cover B' is fixed a bracket or support T terminating at its extremity in a
socket and carrying an arm U to which is jointed a lever V by which the brake of
the motor is controlled or operated as hereinafter explained.
To the front of the box A may be secured a fork each of the prongs C of
which terminates in a lug which like the lugs C' on the box-covers may be fixed
to the table.
The motor operates as follows;-
The operator applies his feet to the stirrup-levers P P¹ which as shown in Fig. 1
may preferably each terminate in a loop, for the reception of the feet, and pushes
on them either alternately or simultaneously so that by means of the catches or
pawls QQ carried on the stirrup-levers both the grooved pulleys O O¹ and the
spring-shaft F on which they are secured will be rotated and the spring D will be
coiled around the shaft F and will impart rotary motion to the spring-box E. The
two motions namely that of the spring-shaft F and that of the spring-box E are
independent of each other these being connected by the spring D. The catches
or pawls S S¹ on the covers B B' prevent backward rotation of the shaft F after
each movement of the stirrups P P. The pressure which the spring D thus coiled
around its shaft F exercises on the spring-box E is transmitted to the machine by
means of the gearing above described. This movement is checked by means of a
brake which is described further on, and which the operator works by the aid of
the before mentioned brake lever V on which he exercises a pressure with his knee
in proportion to the speed with which he desires the machine to work. This brake
both moderates or retards the speed and stops the machine, and is constructed with
a cup a which is carried by the before mentioned bracket T, a socket b which is
rotated with the driving shaft M by means of a pin c which can be moved longitudinally
in a slot d in the said shaft, a slotted sleeve e terminating in a disc e¹ which latter
serves as the retarding medium by being pressed against the interior of the before
mentioned cup a and a preferably coned sleeve which serves for stopping the
The sleeve e
machine by being pressed into frictional contact with the cup a.
may be moved longitudinally on the shaft M but is prevented from having inde-
pendent rotary motion thereon by the pin c. Springs g and the former of which
is weaker than the latter, tend always to hold in their inoperative positions the
sleeves e and f which are both mounted so that they may be moved longitudinally
towards the cup a when the brake lever V is moved by the knee of the operator.
Such a movement of the brake-lever moves the socket and then through the
spring g, first moves the sleeve e and next by means of the spring / the sleeve f.
The outer face of the disc e¹ is plain and when it comes into contact with the corre-
spondingly plain face of the cup a which is stationary, the friction caused thereby
retards the rotation of the driving shaft M, the brake in this case acting as a
moderator. If the operator desires to stop the machine he has only to move the
brake lever V further so that through the spring 1, the exterior conical face of
the sleeve which until then has remained apart from the cup a will come into

page_text: contact with the correspondingly internally coned surface of the stationary cup a
against which it is pressed by the spring which action will stop the machine
immediately.
When the motor is thus stopped the brake-lever V is retained by means of a
catch or pawl m pivotted to it, and which during the pushing of the said lever moves
over a preferably inclined plane n provided as shown in Fig. 4 on an enlarged scale
with a recess or notch o and with a stud or pin p projecting up from the bottom of
the said recess. When the brake is being moved so as to stop the machine the
catch or pawlm on the brake lever V slides along the inclined plane n and its free
end descends into the notch o which arrests it and thus retains the lever V in the
position necessary to keep the machine at rest. In order to start the machine again.
it is sufficient to give a sharp blow to the brake lever V so that the back of the
catch m will strike against the stud or pin p which raises the free end of the catch m
and in consequence releases it from the recess o; on account of the instantaneous-
ness of the movement and by the action of the springs h and g the brake lever V
returns to its inoperative position, thus allowing the parts of the brake to clear
themselves and allowing the machine to operate at the desired speed.
No special means are provided for withdrawing the flat face of e¹ from the flat
face of a because there being nothing to keep them specially in contact they will
naturally fall apart sufficiently for working purposes.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what I
claim is;
1. In a motor the combination with the motor spring and spring shaft of apparatus
such as two grooved wheels 00¹ secured on the shaft one or two stirrup levers P P¹
one or more frictional driving catches or pawls Q Q' and one or more frictional
retaining catches or pawls S S₁ substantially as described and illustrated in the
accompanying drawings.
2. In the brake mechanism of a motor the combination with the driving shaft of
apparatus such as a fixed cup a socket b pin c slot d slotted sleeve and disc e e¹
sleeve springs g and hand brake lever V substantially as described and illustrated
in the accompanying drawings.
3. In the brake mechanism of a motor the combination with the brake lever of
a pawl such as m inclined plane n recess or notch o and pin or stud such as p
substantially as described and illustrated in the accompanying drawings.
4. In a motor the combination with the motor spring and spring-box or case
of an internally toothed wheel G pinions H J L and wheels I and K substantially
as described and illustrated in the accompanying drawings.
5. The combination and arrangement of parts constituting the complete motor
substantially as described and illustrated in the accompanying drawings.
Dated this 13th day of May 1891.
W. P. THOMPSON & BOULT,
Agents for the Applicant.