An Improved Self-acting Mule with Electrical Driving-gear.
Year: 1899

page_text: Date of Application, 2nd June, 1899
Complete Specification Left, 2nd Feb., 1900-Accepted, 31st Mar., 1900
PROVISIONAL SPECIFICATION.
An Improved Self-acting Mule with Electrical Driving-gear.
We, WALDEMAR BRETSCHNEIDER, Director of the Sächsische Kammgarnspin-
nerci, and CARL WILHELM LAUTH, Engineer, both of Harthau, Saxony, in the
German Empire, do hereby declare the nature of this invention to be as follows:-
Electrically-driven self-acting mules are known in which an electromotor
arranged on the carriage drives, by means of the drum-cord or band, the shaft
mounted in the headstock and controlling the drawing-in and out of the carriage.
This arrangement has the disadvantage of involving a disproportionately high
consumption of power since the drum-cord or band must of necessity be tightly
stretched.
In our improved self-acting mule, this disadvantage is obviated inasmuch as
the driving of the shaft controlling the drawing in and out of the carriage is not
effected by the electromotor arranged on the carriage but by a separate source
of power. The electromotor arranged on the carriage thus serves solely for
driving the drums and the spindles.
For this purpose, the motor is arranged on the carriage, and is made with a
hollow shaft which surrounds the drum-shaft, the spindles being driven in a
known manner from the said drum shaft. On the drum shaft is secured a toothed
wheel which engages with a toothed wheel mounted on an intermediate shaft.
On the hollow shaft of the electromotor is secured, on the one side, a section
of clutch No. 1, and on the other side a toothed wheel. The motion of the
latter is transmitted by means of tooth-wheel-driving-gear to a wheel rotating
freely on the drum shaft, a section of clutch No. 2 being mounted on the latter
wheel.
On the drum shaft are moreover arranged the remaining sections of the
two clutches in such a manner that they must take part in the rotation of the
shaft, but can be displaced thereon so that they can be brought, as required, into
or out of engagement with their corresponding clutch-sections.
In drawing out the carriage, clutch No. 1 is thrown into gear so that the drum
shaft is coupled directly with the electromotor. On completion of the drawing
out of the carriage, clutch No. 1 is thrown out of gear and clutch No. 2 into
gear, so that the drum shaft is slowly turned back by means of the train of
gearing above mentioned in order to effect the backing-off of the threads.
The unequal consumption of power by the spindles can be compensated for by
masses arranged on the rotating part of the motor so as to increase the inertia
thereof. The shaft controlling the drawing in and out of the carriage can be
driven by a separate electromotor provided for the purpose or by power trans-
mitted to it in any other suitable manner.
1000

page_text: An Improved Self-acting Mule with Electrical Driving-gear.
We, WALDEMAR BRETSCHNEIDER, Director of the Sächsische Kammgarnspin-
nerei, and CARL WILHELM LAUTH, Engineer, both of Harthau, Saxony, in the
German Empire, 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:
Electrically-driven self-acting mules are known in which an electromotor
arranged on the carriage drives, by means of the drum-cord or band, the shaft
mounted in the headstock and controlling the drawing in and out of the carriage.
This arrangement has the disadvantage of involving a disproportionately high
consumption of power since the drum-cord or band must of necessity be tightly
stretched.
In my improved self-acting mule, this disadvantage is obviated inasmuch as
the driving of the shaft controlling the drawing in and out of the carriage is not
effected by the electromotor arranged on the carriage. but by a separate source
of power. The electromotor arranged on the carriage thus serves solcly for
driving the drums and the spindles.
In the accompanying drawing, a self-acting mule of this kind is shown, as
regards its essential parts, in Figure 1, in longitudinal section through the head-
stock, and in Figure 2 in-plan.
The motor a is arranged on the carriage which is only shown diagram-
matically, in such a manner that it surrounds the drum shaft c by means of
its hollow shaft the spindles being driven in a known manner from the said
drum shaft. On the drum shaft c is secured a toothed wheel n which engages
with a toothed wheel u mounted on the shaft t. The gearing n, u and the
shaft t are employed for the same purpose as, and correspond to the gearing N, U
and shaft T described in the Specification of former Letters Patent granted to us,
dated 2nd June 1897, No. 13599.
On the hollow shaft of the electromotor is secured, on the one side, a
clutch-section g, and on the other side a toothed wheel c. The motion of the
latter is transmitted by means of toothed-wheel-driving-gear p, q, r to a wheel s
rotating freely on the drum-shaft c, another clutch-section of being mounted on
the said wheel s.
On the drum shaft c are morcover arranged the remaining sections g¹ and o
of the two clutches in such a manner that they must take part in the rotation of
the shaft, but can be displaced thereon so that they can be brought, as required,
into or out of engagement with their corresponding clutch-sections or o
In drawing out the carriage, the clutch gg is thrown into gear so that the
drum shaft c is coupled directly with the electromotor. On completion of the
drawing out of the carriage, the clutch g g¹ is thrown out of gear and the
clutch o o into gear, so that the drum shaft is slowly turned back by means of
the train of gearing e, p, q, r, s, in order to effect the backing-off of the threads.
The unequal consumption of power by the spindles can be compensated for
by fly-wheels or other masses conveniently arranged on the rotating parts of the
motor so as to increase the inertia thereof. The shaft w controlling the drawing
in and out of the carriage can be driven, as shown in Figure 1, by a suitable
electromotor provided for the purpose or by power transmitted to it in any
other suitable manner.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is: -
A self-acting mule with electrical driving gear, wherein an electromotor
arranged on the carriage and constantly rotating in the same direction, is
coupled directly by means of two clutches or couplings, in the first place with
the drum shaft, in order to set the spindles for spinning in rapid rotation, and
in the second place indirectly by introducing a train of gearing in order to slowly
turn back the drum shaft to back off the threads, and wherein the electromotor
can be provided with masses arranged so as to increase the inertia thereof, in order
to compensate for the unequal consumption of power of the spindles, substantially
as described.
Dated this 2nd dow of Fahmi 1000
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicants.