Mechanism for Changing the Shuttles of Multiple Shuttle Power Looms.
Year: 1896

page_text: Date of Application, 31st Jan., 1896-Accepted, 7th Mar., 1896
COMPLETE SPECIFICATION.
Mechanism for Changing the Shuttles of Multiple Shuttle Power
Looms.
I, GEORG SCHWABE, of Biala near Bielitz in Austrian Silesia, Engineer, 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 :-
This invention relates to a mechanism for changing the shuttles in multiple
shuttle looms, whereby excentrics or cranks working with semi-rotation actuate
directly the shuttle box carrier without the use of any intermediate mechanism.
I will describe the said mechanism with reference to the accompanying
drawings.
Fig. 1 shews a vertical section of the mechanism, Fig. 2 a front view, Fig. 3 a
part side view, Fig. 4 a view of the cranks in the position for the first compartment
of the shuttle box.
The crank shaft a of the loot drives a short shaft a' through bevil wheels, on
which shaft is the crank which actuates the double armed lever d fixed on
shaft e, and this lever imparts the up and down motion to the knife rails g g' by
means of the connecting rods f.
The pattern card actuates in the usual manner the vertical toothed hook
bars k k so as to bring the hooks in front of the knife rails y g' in order
to be lifted thereby.
The teeth of each hook-bar engage with a corresponding toothed wheel l l l
which turn loose side by side on the fixed axis a.
The wheel has an excentric or crank m formed in one therewith, the strap and
rod of which is guided vertically at o by the radius rod p pivotted to a fixed
pin y. On the connecting pin at o of the excentric or crank rod r is a second
excentric or crank m' having an excentric strap with rod which is guided
vertically at o' by the radius rod p' pivotted to the fixed pin y. The point o¹ of
the rod carries another crank or excentric m², the pin o² of which is connected
by the rod with the pin o' of the shuttle box carrier p², the latter being carried
on the fixed pin and which serves to guide the pin o vertically. The other end
of the shuttle box carrier p² is connected by a rod directly with the shuttle
box r, and to a short arm thereon is attached the spring t connected to the loom
frame.
The toothed wheel has its excentric m formed in one therewith, as above
stated; the second toothed wheel gears with a toothed segment u pivotted on
a fixed pin n and having an arm to which is pivotted at 7 a toothed rack w, which
engages with the toothed wheels connected with the second excentric or
crank m', and which rack, being pivotted at q, serves to guide the excentric m¹
and toothed wheel s in their vertical motion.
In the same way the third toothed wheel gears with the toothed segment u
pivotted on the fixed pin n, and having pivotted to it at q' a toothed rack w¹
gearing with the toothed wheel s fixed to the third crank or excentric m², and
which rack also serves to guide the wheels and crank m³ in their vertical motion
being pivotted at q'.
The toothed wheels have a small hollow for the reception of a brake strap,
which only has the purpose of preventing any over running of the toothed hook-
hars during their motion.

page_text: According as the hooked bar is moved upward or downward by the knife
rails gg', the toothed wheel with the excentric m can perform a semi-revolution
upward or downward upon the pin ..
The excentric band and rod r, which is guided vertically at o consequently rises
and falls, and as the rod r and pin o are connected with the shuttle box carrier p
at o through the other cranks or excentrics m and m² and their rods, the carrier
will fall and rise through two points corresponding to two positions of the shuttle
box v.
At the same time the toothed racks w and ¹ rise and fall without altering the
highest or lowest position of the excentric m' and crank m² gearing therewith.
The stroke of the excentric m is, with this direct action, equal to the extent of
motion required for the point o for bringing the desired shuttle compartment into
position.
According as the second hooked bar is moved up or down by the reciprocating
kuife rails gg, the second toothed wheel will receive a semi-rotation, and will
impart a corresponding motion through toothed segment u, toothed rack w, toothed
whcel s to excentric m. By this means the strap and rod of the excentric m' will
rise and fall in the point o', and will thus afford two other positions for the shuttle
box through the direct connection with the point o³.
According as the third hooked bar k receives an upward or downward motion
from the knife rails y g', the third toothed wheel will receive a semi-rotation,
and will impart a corresponding motion to the toothed wheel s' and crank
through toothed segment ' and toothed rack w¹.
By this means the crank rod r will be raised or lowered, and consequently will
raise or lower the point 3 of the shuttle box carrier p, producing two, or four,
farther shuttle box positions, according as the stroke of the crank is equal to or
twice that of the height of the shuttle box.
By introducing a farther crank or excentric in this direct connection between
the fixed point and the point o³, the shuttle box carrier will be capable of
receiving corresponding farther positions, and so on, while by reducing the stroke
of the excentric any desired number of positions may be obtained for the shuttle
box.
With all positions of the latter the points o o¹ o o³ of the excentric and crank
rods, as also the dead centres of the excentrics or cranks m m' m² will lie in the
straight line drawn from the fixed point to the point o³ of the shuttle box
carrier.
Fig. 5 shews a diagram of the above described device arranged for obtaining
four positions of the shuttle box by means of two excentrics, the parts being
indicated by the same letters as the corresponding parts in the previous figures.
IIaving now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what 1
claim is :-
Apparatus for changing the shuttle of multiple shuttle power looms, with
employment of excentrics or cranks moveably connected with cach other, wherein
the excentric or crank rods receive an approximately straight motion by means of
radius rods, the shaft of each excentric or crank being prevented from participating
in the rotation of the other excentrics or cranks but only receives the rectilineal
motion produced by them, substantially as described.
Dated this 31st day of January 1904
ABEL & IMRAY,
Agents for the Applicant.