IMPROVEMENTS IN SPRING MOTORS FOR SEWING MACHINES
Year: 1884

page_text: I CARL FRIEDRICH THEODOR NOELLNER of the firm of Kable and Noellner of
Rio de Janeiro, Empire of Brazil, Merchant, do hereby declare the nature of my
invention for "IMPROVEMENTS IN SPRING MOTORS FOR SEWING MACHINES" to be as
follows:-
:
The Invention relates to improvements in spring motors for driving sewing
machines; and the objects of my improvements are first to facilitate the winding-
up of the driving spring, second to provide a suitable brake to the motor, and
third to connect the motor and the machine in a more perfect manner.
To effect this I give the winding-up lover the form of an angle, the two arms of
which are inclined towards each other under nearly 30 degrees.; the end of the ono
arm is connected with the ratchet wheel which is fixed to the spindle of the
driving spring; the free end of the other arm is provided with a handle.
This form of the winding up levor is proferably suited to the tables of sowing
machines, as it allows the winding up of the driving spring by a very short.
motion, which may easily be executed by the operator sitting before the machine
obviating the necessity for him to quit his seat, and without interupting his work.
The brake, of which I make use according to my invention consists of an angle-
lever, one arm of which is drawn downwards by a spring, thus forcing the other
arm which is connected with the braking block against the braking disc, so the
motor is braked ordinarily. To withdraw the brake, I employ a lever provided
with an incline which may bo easily pushed under a corrosponding inclined surface
of the arm of the angle lever whoreto the spring is attached; thus regulating the
velocity of the motor in the most precise manner.
The crank which communicates the motion of the motor to the sowing machine,
is attached to the same shaft, whereon the braking disc is fixed. It is composed of
two arms connected by a hinge and kept in proper rectangular position by a spring
fastened to the one arm and engaging into a projection of the other arin engaging
into the space between two spokes of the ly wheel of the sewing machine. A
spring bolt is provided at one side of this horizontal arm, which pressing against
one spoke of the fly wheel of the sewing machine keeps the opposite surface of the
horizontal arm in proper contact with the adjacent spoke thus preventing all
shaking and dead running of the crank.

page_text: COMPLETE SPECIFICATION.
I, CARL FRIEDRICH THEODOR NOELLNER, of the firm of Kahle and Noellner, of
Rio de Janeiro, Empire of Brazil, Merchant, do hereby declaro the nature of my
invention for "IMPROVEMENTS IN SPRING MOTORS FOR SEWING MACHINES," and
in what manner the same is to be perforined, to be particularly described and
ascertained in and by the following statement :—
The invention relates to improvements in spring motors for driving: sewing
machines ; and the objects of my improvements aro, first; to facilitate the winding
up of the driving spring; second, to provide a suitable brake to the motor; and
third, to connect the motor and the machine in a more perfect manner.
I attain these objects by the mechanism illustrated in the accompanying
drawing, in which
Figure 1 is a side elevation of my improved motor as applied to the table of a
sewing machine; fig. 2 is a side elevation, partly in section, of the motor on a
larger scale; fig. 3 is a front view, partly in section, of the same; fig. 4 is an
elevation winding-up handle; fig. 5 is a plan of the braking device; and fig. 6, a
detailed view of the crank connecting the motor with the fly-wheel of the sewing
machine.
Similar letters refer to similar parts throughout the several views.
The winding-up lever, a b, is of the form of an angle, the two arms of which are
inclined towards each other under nearly 30 degrees; the end of the one arm, a, is
connected with the ratchet wheel d, which is fixed to the spindle of the driving
spring; the free end of the other arm, b, is provided with a handle, c. This form
of the winding-up lever is proferably suited to the tables of sewing machines, as it
allows the winding-up of the driving spring by a very short motion, which may easily.
be executed by the operator sitting before the machine, thus obviating the necessity
of his quitting his seat, and without interrupting his work. In fig. 1 of the
drawing, the two extreme positions of the angle lever are represented-the highest
position by dotted lines.
The brake, of which I make use according to my invention, consists of a bell
crank, ef, the one arm, e, of which is drawn downwards by a spring, i, thus
forcing the curved prolongation, f', of the other arm, f; which is connected with
the braking block, f¹, against the braking disc, h; so the motor is braked
ordinarily. To withdraw the brake, I employ a lover, k, provided with an incline k',
which may be easily puslied under a corresponding inclined surface of the arm c,
of the angle lever, whereto the spring, i, is attached; thus regulating the velocity
of the motor in the most precise manner.
The crank, mn, which communicates the motion of the motor to the sewing
machine, is attached to the same shaft, l, whereon the braking disk, h, is fixed.
It is composed of two arms, 'm and n, connected by a hinge, and kept in proper
rectangular position by a spring, o, fastened to the arm, m, and engaging into a
projection, n, of the other arm, n, which engages into the space between two spokes
of the fly-wheel of the sewing machine. A spring bolt, p, is provided at one side
of this horizontal arm, n, and is pressed by the spring, q, against one spoke of tho

page_text: Ay-wheel of the sewing machine; it thereby keeps the opposite surface of the
horizontal arm in proper contact with the adjacent spoke, thus preventing all
shaking and dead running of the crank.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. In spring-motors for sewing machines, the combination of the V-shaped
lever, a b, with the mechanism for winding.up the driving spring substantially as
specified.
2. In spring-motors for sewing machines, the combination of the braking
block, f, with the bell crank, ef, the spring'i, and the lever k, provided with the
incline, ; substantially as set forth.
3. In spring-motors for sewing machines, the combination of the crank, m n,
with the spring bolt, p, substantially as and for the purpose specified,
Dated this 3rd day of July 1885.
PHILLIPS & LEIGH,
Patent Agents,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.