Improved Slay Motion for Producing Looped Fabrics.
Year: 1894

page_text: Date of Application, 30th Mar., 1894-Accepted, 5th May, 1894
COMPLETE SPECIFICATION.
Improved Slay Motion for Producing Looped Fabrics.
I WILHELM RUMPF of Lambrecht, Germany, Master Joiner, do hereby.
eclare the nature of this invention and in what manner the same is to be
erformed to be particularly described and ascertained in and by the following
atement:-
Figure 3 is a section through A-B of Figure 2.
Figure 4 is a sectional elevation on a larger scale of parts shown in Figure 3.
In this figure the varying positions of the parts are indicated by dotted and full
lines.
Figure 5 shows the same parts as in Figure 4 but with the slay at the end of its
forward augmented stroke.
In all the figures the same letters refer to the same parts.
The production of looped fabrics is effected by a variable stroke of the slay:
which is so arranged that after two or more ordinary beats the next beat is
given with an augmented stroke of the slay which pushes together the separately
shot groups of weft threads and thus forms loops of the warp threads.
To bring about the augmentation of the stroke of the slay the connecting
rods eel instead of being attached direct to the slay C are connected to the two
armed levers ff' fulcrumed in the upper part of the slay arms just behind the slay
itself.
The links connect the long lower arms of the levers f f¹ with the short
levers on the shaft k which extends across from one slay arm to the other.
Fulcrumed in the breast beam and in the cross rail p are two detent bars o
and g connected by a link r. Each of the detent bars o and 7 has a notch. The
notch in the top bar o is to receive the nose m and that in the lower bar q is to
receive the nose n.
Mounted on the tappet shaft r are four treading tappets w w¹ 2010 which
actuate the four treading levers u u¹ u² u³ (having their fulcrums at D) for the
purpose of operating the healds E. On the same shaft is a tappet (see Figure 4)
which acting in combination with the spring t imparts an up and down motion to
the detent levers o and q and the connecting rod r.
The pinion y (Figure 1) mounted on the driving shaft b transmits motion
through the toothed wheel z to the tappet shaft v and thence through the excentric
and strap and its connecting rod F to the ratchet wheel G which operates the sand
or fluted roller H.
The rotation of the toothed wheel a is transmitted to the crank shaft d through
the toothed wheel c. The crank shaft d acting through the connecting rods e el
imparts a to and fro motion to the slay for the purpose of beating up. The rotation
of the toothed wheel a also operates the tappet shaft r, the gearing being so pro-
portioned that the crank shaft d rotates three times to each rotation of the tappet
shaft v.
and
When by the rotation of the tappet shaft the tappet x rises the detent bars o
q and the link r are lifted and the nose n engages in the notch in the lower
bar 9 and remains therein during two revolutions of the crank shaft d that is. to say
during two beats of the slay (position C Figure 4). When the tappet * descends

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at the beginning of the next revolution the spring t pulls the detent bars og and the
link downwards. The nose n is thereby released from the notch in the detent
bar and the nose m engages with the notch in the bar o. Meanwhile the pull on
the fulcrums of the levers ff' arising on the links hh' causes a pressure against
the slay C and increases its stroke towards the cloth and causes it to assume the
position C¹ (Figure 5) and so on alternately. The slay in this case makes two
short strokes and one long stroke. By the short strokes of the slay the groups of
weft thread arise which are pushed together by the long strokes of the slay and
thus form loops in the warp.
By the hereinbefore described arrangement I am enabled to weave looped towels
and bath sheets-cloth with loops in diamond patterns plush-closed at one side and
(if the latter is subsequently sheared) open plush. The chief advantage of the
present invention is in fact the means it offers for the cheap and rapid production
of the last named open plush.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The use combination and arrangement of parts substantially as herein
described and shown for varying the stroke of the slay of a loom.
2. In combination with the slay of a loom the levers ff' the links h h' the
shaft k the detent bars o and q the link r the tappet the spring t and the noses m
and n for producing two short beats alternating with one long beat of the slay
substantially as and for the purpose described and set forth.
Dated 29th day of Misch 1904
E. T. WHITELOW, A.M. Inst. C.E.,
70, Deansgate, Manchester, Agent for the Applicant.