Improvements in or relating to the Winding of Spring Motors for Sewing Machines and other Purposes.
Year: 1888

page_text: Improvements in or relating to the Winding of Spring Motors for
Sewing Machines and other Purposes.
I ALBERT KAHL of Graskeller No. 21 Hamburg in the Empire of Germany
Manufacturer do hereby declare the nature of this invention to be as follows:-
This invention relates to the winding of spring motors for actuating sewing
machines and other machines and its purpose is to permit of the winding of the motor
by a hand lever as easily as possible and to render the same adjustable corresponding
to the power and length of arm of the operator.
Referring to the accompanying drawings
Fig. 1 is a front elevation.
Fig. 2, a side elevation of a sewing machine provided with the motor.
Figs. 3, 4 and 5, show on an enlarged scale the adjustable winding device.
The machine illustrated may also be moved by foot. in which case the strap & is
placed on the pulley e integral with the fly wheel and actuated in the usual manner by
the treadle f.
To actuate the machine by means of the spring motor the cord is placed as
shown on the disc o rigidly connected with shaft r. The motion is then effected by
the toothed gear v vl from the motor which drives the shaft of the wheel v.
The motor with power derived from a spring is of any known construction. The
novelty of the device is in the hereinafter described winding device.
The winding is effected by the lever with handle G which may be moved to and
fro, and in both directions of movement acts in the same direction on the spring and
tensions the same. The lever has shown by Fig. 5 is loosely pivoted on the
projecting end of the shaft a of the spring box the said shaft carrying a drum D.
The lever carries the cam which is so shaped as to jam on the drum D during the
forward movement of the lever so as to move the same but to slide over the periphery
of the drum on the return of the lever. A spring q maintains the contact between
the cam and the drum.

page_text: On the side of the drum D opposite to the lever h a second lever h¹ is loosely
pivoted on the shaft a, (Fig. 5) and this lever ' carries likewise a cam l acting on the
periphery of the drum D. This cam is of a similar shape to the cam and carries
along the disc D and thereby the shaft a when it turns in the direction of the
arrow.
By an intermediate mechanism the movement of lever is dependent on that of
the lever h the arrangement being however so made that the lever h' moves in the
contrary direction to the lever h Consequently the lever ¹ turns the disc D when the
lever returns empty and the cam of the lever h¹ slides on the periphery when that of
the lever effects the rotation of the disc D.
This intermediate mechanism may consist of the two curved arms and t¹ each of
which is connected at one end with one of the levers h and h' and at the other end
with an army oscillating about a stationary pivot x. The arm is adapted to be
displaced in a slit k of the army and to be fixed at a greater or less distance from the
pivot x.
The cams and being held in continuous contact with the disc D serve at the same
time as a brake and prevent the drum from unwinding.

page_text: Manufacturer,
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the same is to be performed to be particularly described and ascertained in and
by the following statement :-
This invention relates to the winding of spring motors for actuating sewing
machines and other machines, and its purpose is to permit of the winding of the motor
by a hand lever as easily as possible and to render the same adjustable corresponding
to the power and length of arm of the operator.
Referring to the drawings filed with my provisional specification:
Fig. 1 is a front elevation.
Fig. 2 a side elevation of a sewing machine provided with the motor.
Figs. 3, 4 and 5 show on an enlarged scale the adjustable winding device.
The machine illustrated may also be moved by foot, in which case the straps is
placed on the cord pulley e integral with the fly wheel and actuated in the usual
manner by the treddle f.
To actuate the machine by means of the spring motor, the cord s is placed, as shown,
on the disc o rigidly connected with shaft r. The motion is then effected by the
toothed gear vv from the motor which drives the shaft of the wheel v.
The motor with power derived from a spring is of any known construction. The
novelty of the device is in the hereinafter described winding device.
The winding is effected by a lever with handle G, which may be moved to and
fro and in both directions of movement acts in the same direction on the spring and
tensions the same. The lever h, as shown by Fig. 5, is loosely pivoted on the projecting
end of the shaft a of the spring box, the said shaft carrying a drum D. The lever
carries the cam which is so shaped as to jam on the drum D during the forward
movement of the lever h so as to move the same, but to slide over the periphery of
the drum on the return of the lever. A spring g maintains the contact between the
cam and the drum.
On the side of the drum D opposite to the lever h, a second lever h¹ is loosely
pivoted on the shaft a (Fig. 5) and this lever carries likewise a cam l'acting on
the periphery of the drum D. This cam is of a similar shape to the cam
carries along the drum D, and thereby the shaft a when it turns in the direction of the
arrow.
and
By an intermediate mechanism the movement of lever h¹ is dependent on that of
the lever h the arrangement being. however so made that the lever h¹ moves in the
contrary direction to the lever h. Consequently the lever ¹ turns the drum D, when
the lever h returns empty, and the cam of the lever ¹ slides on the periphery when
that of the lever effects the rotation of the drum D.

page_text: This intermediate mechanisın may consist of the two curved arms t and t¹ each of
which is connected at one end with one of the levers hand and at the other end
with an arm y oscillating about a stationary pivot x. The arm t¹ is adapted to be
displaced in a slit k of the arm y and to be fixed at a greater or less distance from the
pivota.
When the lever is drawn forward from the position of Fig. 3, the arm & presses
the army outward as shown in Fig. 4 and the arm t¹ draws the lever h¹ against h, the
clamp of the same sliding. When, vice versa, h is moved upward, the lever ' turns
in the contrary direction and then its clamp acts on drum D and revolves the same.
With both movements of h therefore the shaft a is revolved in the same direction and
the spring of the motor is wound thereby. The cams and being held in continuous
contact with the drum D, serve at the same time as a brake and prevent the drum
from unwinding. As on pressing back the lever h, the work cannot be less easily
done than on pulling the lever, the lever ¹ is so arranged that its movement can be
retarded by fixing the arm t' in the slit k nearer the pivot x. If for instance t¹ were
connected at c with y, the point c would only oscillate up to c¹ and the lever h¹ would
turn short of the position illustrated in the drawing.
This manner, of adjustment allows the operator to make the displacement of the
lever and that of the lever / convenient to the length of his arm and power.
The force requisite to operate the lever h can be adjusted by simply elongating or
shortening the latter.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
1. The combination with the drum D of a spring actuated motor of a lever h with
pawl and lever h³ with said levers being connected for operation in the manner set
forth.
2. The combination with the levers hh¹ of the pivoted lever y and arms t t¹
substantially as and for the purpose described.
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