IMPROVED APPARATUS FOR DRIVING BY SPRING POWER SEWING MACHINES AND OTHER MACHINES REQUIRING A LIMITED AMOUNT OF MOTIVE POWER
Year: 1877

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, of the Firm of J. Brandt
and G. W. von Nawrocki, Civil Engineers and Patent Agents, of No. 2, Koch
Strasse, Berlin, in the German Empire, for the Invention of " IMPROVED
APPARATUS FOR DRIVING BY SPRING POWER SEWING MACHINES AND OTHER
MACHINES REQUIRING A LIMITED AMOUNT OF MOTIVE POWER." A commu-
nication by Joseph Schreiber, of Vienna, in the Empire of Austria.
Sealed the 18th December 1877, and dated the 3rd August 1877.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 3rd August
1877.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W.
von Nawrocki, Civil Engineers and Patent Agents, of No. 2, Koch Strasse, Berlin,
in the German Empire. " IMPROVED APPARATUS FOR DRIVING BY SPRING POWER
SEWING MACHINES AND OTHER MACHINES REQUIRING A LIMITED AMOUnt of
MOTIVE POWER." [A communication by Joseph Schreiber, of Vienna, in the Empire
of Austria.]
According to the present Invention a shaft carried in bearings on a framing has
fixed to it the inner end of a spiral spring, the outer end of which is connected to a
barrel mounted with a boss loose on the shaft. On the boss is a worm wheel, in
gear with which is a worm on a spindle that is rotated by means of a hand wheel
and power-increasing gearing for the purpose of turning the said barrel, and thus
winding up the spring, whereby rotary motion is imparted to its shaft.
this shaft is a second spiral spring, also enclosed by and connected to a barrel, so
that the shaft imparts its rotary motion to this barrel through the second spring,
and the barrel imparts its motion through a toothed rim to a pinion on a shaft
connected by suitable speed-increasing gearing to a fly wheel shaft; this in its turn
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page_text: is connected by a pulley and strap to a shaft connected by bevil gearing to the
driving shaft of the sewing machine or other machine to be driven. From this
arrangement it will be seen that while the first above-named spring is being wound
up by the worm and worm wheel the second spring is also wound up by the conse-
quent rotation of the shaft carrying them, and thus the two springs are both caused
to act simultaneously in driving the sewing machine.
If a reduction of the power is required at any time this is effected by means of a
break applied to the shaft carrying the springs, so that by stopping its rotation more
or less the power of the first spring is more or less entirely taken off.
For further limiting the power of the machine, or for stopping its action entirely,
a spring break block is caused by means of an eccentric to bear with more or less
force against the periphery of the before-mentioned fly wheel, the shaft of which is
geared by a strap to the sewing machine. This shaft also carries a governor of any
suitable known construction for regulating the motion, the action of the governor
being increased by a lever connected thereto and to a spring counteracting the
governor balls.
By the above-described action of the two driving springs it will be seen that the
winding up of the machine may be effected from time to time without stopping the
motion of the sewing machine or other machine driven thereby.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed by
the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Office on
the 1st February 1878.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W.
von Nawrocki, Civil Engineers and Patent Agents, of No. 2, Koch Strasse, Berlin, in
the German Empire. IMPROVED APPARATUS FOR DRIVING BY SPRING POWER
SEWING MACHINES AND OTHER MACHINES REQUIRING A LIMITED AMOUNT OF
MOTIVE POWER." A communication by Joseph Schreiber, of Vienna, in the Empire
of Austria.
According to the present Invention a shaft carried in bearings on a framing has
'fixed to it the inner end of a spiral spring, the outer end of which is connected to a
barrel mounted with a boss loose on the shaft. On the boss is a worm wheel, in
gear with which is a worm on a spindle that is rotated by means of a hand wheel
and power-increasing gearing for the purpose of turning the said barrel, and thus
winding up the spring, whereby rotary motion is imparted to its shaft. On this
shaft is a second spiral spring also enclosed by and connected to a barrel, so that
the shaft imparts its rotary motion to this barrel through the second spring, and the
barrel imparts its motion through a toothed rim to a pinion on a shaft connected
by suitable speed-increasing gearing to a fly wheel shaft; this in its turn is connected
by a pulley and strap to a shaft connected by bevil gearing to the driving shaft of
the sewing machine or other machine to be driven. From this arrangement it will
be seen that while the first above-named spring is being wound up by the worm
and worm wheel, the second spring is also wound up by the consequent rotation of
the shaft carrying them, and thus the two springs are both caused to act simulta-
neously in driving the sewing machine.
If a reduction of the power is required at any time, this is effected by means of a

page_text: brake applied to the shaft carrying the springs, so that by stopping its rotation
more or less the power of the first spring is more or less entirely taken off.
For further limiting the power of the machine, or for stopping its action entirely,
a spring break block is caused by means of an eccentric to bear with more or less
force against the periphery of the before-mentioned fly wheel, the shaft of which is
geared by a strap to the sewing machine. This shaft also carries a governor of any
suitable known construction for regulating the motion, the action of the governor
being increased by a lever connected thereto and to a spring counteracting the
governor balls.
By the above-described action of the two driving springs it will be seen that the
winding up of the machine may be effected from time to time without stopping the
motion of the sewing machine or other machine driven thereby.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a front view; Fig. II., a section on A, B, (Fig. V.); Fig. III., a section
on C, D, (Fig. V.); Fig. IV. is a plan with the cover removed; Fig. V., a sectional
plan taken on the level of the spring spindle; and Fig. VI. is a back view of
spring motor apparatus according to this Invention suitable for driving a sewing
machine.
The apparatus is contained in a casing between the cover A with the bottom
plate B. The movement is given by the two springs C and D, which are fixed on
the spindle E, and are contained in barrels C and D, which are free on the spindle.
The barrel Ci has a boss, on which is fixed the worm wheel R, as shewn in the
Figures; it is preferred however for the sake of strength to secure the wheel R to
the face of the barrel C¹ by screws, with a suitable washer interposed. The worm R¹
which gears with the wheel R is on a spindle connected by gearing S, S', to the
hand wheel T and crank T₁, by which the springs are wound. The barrel D' of the
second spring D has teeth F gearing with the pinion F¹ on the spindle G, and this
spindle by the multiplying gear H, H', and the oblique toothed wheel K¹ and
worm K drives the upright spindle K. A pulley L on this spindle works by a
band the pulley O, which through bevil gear P¹, P, drives the machine shaft Q. The
upright spindle K has on it the fly wheel M and governor N, the lever f of which is
connected by a rod b to a spring d. The break g can when required be pressed
against the wheel M by the eccentric h worked by the handle i; also the break
band y can be drawn up by the screw Z having a nut m worked by the handle l, so
as entirely to stop the spindle E, whilst the spring D continues to operate.
Having thus described the nature of the said Invention, and in what manner the'
same is to be performed as communicated to me by my correspondent, I claim, the
herein-before described spring motor apparatus wherein two springs are fixed on
one spindle, the barrel of the one being moved by worm-winding gear, and the
barrel of the other working the motor gear, and breaks are provided to be applied
by hand to the spring spindle, or to the motor gear.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have here-
unto set my hand and seal, this Thirtieth day of January, in the year
of our Lord One thousand eight hundred and seventy-eight.