Improvements in Loom Shedding Motions.
Year: 1891

page_text: Date of Application, 14th Dec., 1891-Accepted, 30th Jan., 1892
COMPLETE SPECIFICATION.
Improvements in Loom Shedding Motions.
I, GERARDUS JACOBUS ULRICI, of Dülken in the Kingdom of Prussia and
German Empire, Manufacturer, 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 the shedding motion for looms for weaving satins and
fancy fabrics.
I will describe my improvements with reference to the accompanying drawings
in which-
Figure 1 represents a vertical elevation of the motion;
Figure 2, an elevation of one of the tappets;
Figure 3, a horizontal section through Figure 1; and
Figure 4, a vertical section along the line -, Figure 1.
As many tappets are provided as there are shafts in the loom. Each consists of
two parts, one of which is an oscillating frame e and the other a vertically sliding
piece which moves in guides in the oscillating part e. The sliding piece is
operated through a suitable lever from a pattern wheel or pattern chain so that it
may occupy the position in the oscillating part e indicated by Figure 1 when the
jack lever c is in the higher part of its stroke, or in that indicated by Figure 2
when the jack lever would be in the lower part of the stroke.
a is the loom crank shaft; the frame side; and a fixed shaft on which the
tappets are mounted and around which they are free to move.
In each of the oscillating parts e, a guide is formed so that when the part e has
moved the length of its stroke in the direction of the arrow (Figure 1), the friction
bowl d carried on the jack shaft c, is enclosed within the guide and the jack shaft is
thereby held down until the motion of the tappet is reversed. On the opposite part
of e, a guide flange is formed at such a height that when the jack shaft is in its
higher position, the bowl d will ride upon it as in Figure 1, where the bowl is indi-
cated as just entering upon the flange. It is also arranged that when the jack lever is
in its lower position, the friction bowl d will ride under the flange i as indicated by
Figure 2, where the bowl is just entering as in Figure 1. The upper part of the
slide y has two inclined planes i¹ formed upon it. Assuming the bowl d on the
jack lever to be in the guide h, and the sliding piece in the position shewn by
Figure 1, then, when the tappet is moved in the direction opposite to that indicated
by the arrow, the bowl d will be guided by the incline to the top of the flange i
and the jack lever c will consequently be lifted. If however, the slide plate has
been moved by the pattern mechanism to the position indicated by Figure 2, then
the bowl d will be guided by the incline under the flange i, and the jack lever
will be lowered. It will be obvious therefore that the shedding is controlled
by the position in the tappet of the sliding piece g which is controlled by the
pattern chain.
The oscillating tappets may make either as many oscillations in a given time as
the crank shaft makes revolutions, or half as many. As indicated by the drawings,
the oscillations are equal to the revolutions, and for each revolution the tappets
swing backwards and forwards. Their motion is derived from the crank shaft a on
which the spur wheel k is fixed. This wheel gears through the idle wheel 1, with
the wheel m, on which the crank pin n is secured. All the tappets are connected
together by means of the stud n' the end of which is secured to the connecting
rod o which has its other end secured upon the crank pin n. The motion of the
crank shaft is thus positively conveyed to all the tappets through the connecting
rod o.

page_text: The slides are moved as desired by the bell-crank levers p which may either
push the slides upwards or draw them down. The necessary motion of the levers p
is obtained from a pattern wheel or from the pattern chain 7, there being a separate
pattern device for each tappet. It is obvious that the pattern projections acting
upon the bent part of the lever p will lift the opposite end of the lever, and either lift
the slide gor permit it to be lifted by a spring, and that the recesses in the pattern
device cause the opposite effect. As illustrated by the drawings the spring normally
holds the slide in the higher position. At every recess in the pattern device there-
fore, the springs will pull the lever p downwards, and thus bring the slide into
the lower position. To prevent the slide g from being lifted too high or drawn
too low, suitable stops such as t t are secured upon the part e.
The pattern wheel or cylinder is rotated by suitable gearing from the spindle of
the wheel m as shewn.
The connection between the tappets may be additionally secured by means of
the screws or bolts and they may be counterbalanced by the weight w which
may be cast in one piece with the part e.
Instead of securing the oscillation of the tappets by wheel gearing as described,
it may be obtained by other suitable means.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is―
1. A shedding motion for fancy and similar looms, constructed arranged and
operating substantially as hereinbefore described and as illustrated by the
accompanying drawings.
2. Oscillating tappets for looms, having sliding parts such as g furnished with
guides for the jack levers; substantially as hereinbefore described and as
illustrated by the accompanying drawings,
Dated this 12th day of December A.D. 1891.
WILLIAM E. HEYS,
Agent for the Applicant.