Improved Reversing Mechanism for Loom "Change-box" Motions.
Year: 1893

page_text: Date of Application, 31st Oct., 1893-Accepted, 23rd June, 1894
COMPLETE SPECIFICATION.
Improved Reversing Mechanism for Loom "Change-box" Motions.
I, EMIL SPIEGEL, Manufacturer, of 418 Josefstrasse, Warnsdorf, Bohemia, in
the Austro-Hungarian 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:—
.
This invention relates to dobbies and consists of improved reversing mechanism for
loom "change-box motions," its object being to enable the operative, whatever his
position to the loom may be at the time, to turn the pattern-card prism or lag
cylinder backwards, when, in consequence of a breakage of the thread or other
accident in the shed, it becomes necessary to work over again a card previously
employed.
In the accompanying drawings, the improved device is illustrated in two views,
Fig. 1 being an elevation of a loom with a diagrammatic representation of the
improved mechanism as applied to one of Hattersley's "loom change-box motion's";
and Fig. 2 being a plan thereof.
As shown in the drawings, the mechanism is operated from the tappet shaft S S W
(H W being the ordinary main or crank shaft) which normally serves to produce
the throw of the shuttle; upon the said shaft SS W is mounted an eccentric E
(Fig. 1) which, by means of the eccentric rod c, is adapted to impart oscillatory
movements to a pair of double-armed levers b b, mounted upon a common axle or
pivot i; the said rod c being suitably connected with the arm a of the rearmost lever b.
The arms b are provided with eyes at one end (the head) and thereby, in the usual
manner, connected with the draw-knives. To the front lever b is pivoted the
pawl k which, as this lever boscillates, engages with a ratchet wheels attached to
the card-prism Z-Figs. 1 and 2,-whereby the pattern-card g' is turned one step
further at each stroke.
Hitherto, whenever a thread happened to break, or a similar accident occurred,
the attendant was under the necessity of turning back the ratchet-wheels by hand,
in order to remove the cause of the disturbance. When, however (as frequently
happens), at the moment when the work is thus disturbed, the attending operative
is on the opposite side of the loom, he is thereby precluded from remedying the
drawback or disorder instantly, having to walk round one side of the loom, before
he can see to it; so that a loss of time has hitherto invariably been sustained iu
such cases. The present invention enables the pattern prisin or cylinder to be
turned backwards as well as forwards, so that the operative is in a position to
attend to accidents of the kind referred to from the side of the loom opposite to
that where the change-box motion is situated, and need not, for the purpose, come
over to that side, should he happen to be on the opposite side.
The operation of the improved mechanism is as follows;-
V
In front of the ratchet wheels, another similar wheel 1 (Figs. 1 and 2) is
arranged to be acted upon by a lever g pivoted at o. A spring constantly tends
to depress the front part of the pawl e. The sliding rod H rests within two
guides (Figs. 1 and 2), while the opposite end thereof is pivotally connected
with a lever J, which in its turn is pivotally connected with a bracket t of the
machine frame, and terminates in a handle r. The spring F retains the lever J in
the position shown in the drawings. When the handler is moved in the direction
of the arrow II, a bolt f (Figs. 1 and 2) disengages the pawl k from the ratchet
wheels, while the other, lower pawl e turns the ratchet wheel in the opposite
direction, so that the card prism is turned backward. When the handle ris
D .
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page_text: released, the spring F draws the lever J in the direction of the arrow I, the sliding
rod H returns to its original position, and the bolt or catch f releases the pawl k, so
that the hook e is disengaged from the ratchet wheels, and the loom is ready for
further operation.
In the accompanying drawings the improvements are supposed to be applied to
Hattersley's type of change-box motion, but it will be understood that it is equally
applicable to other change-box motions.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is ;-
Reversing mechanism for loom change-box motions, chiefly comprising a ratchet
wheel (s) on the pattern card-prism or cylinder (Z) adapted to be so acted upon
by a pawl (e) connected with a sliding rod (H) a hand lever (J) and a releasing
bolt (f), that the said prism or cylinder is thereby turned backwards; the said
bolt (f) being arranged to throw out of gear at each stroke the pawl (k), by which
forward motion is imparted to the pattern prism or cylinder, and also to release the
lower pawl e, after the backward movement, by means of a spring F, for the
purpose of enabling the operative, whatever his position, reliably and conveniently
to reverse the motion of the card prism or cylinder, substantially as described.
Dated this 30th day of October 1893.
FAIRFAX & WETTER,
433, Strand, London, Agents.