Improvements in Jacquard Looms.
Year: 1891

page_text: ate of Application, 14th Oct., 1891-Accepted, 9th Jan., 1892
COMPLETE SPECIFICATION.
Improvements in Jacquard Looms.
I WILHELM HOLTHAUS of the City of Elberfeld in the 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 :-
In my application for a Patent No. 20901-1890 I have described and more
particularly claimed under Claims 1 and 2 certain means for decreasing the number
of cards required in Jacquard looms but I find that the means proposed cause the
loom to appear complicated, and I therefore propose as an alternative to employ the
means hereinafter described and fully illustrated in the drawings herewith,
the figures being marked from 4° to 22.
The raising of hooks u and plate d, which was fully described in the above
mentioned Specification and shown in the drawings under the same marks is now
effected by means of the sinkers.
In order that the backward motion of the said parts be as uniform as the raising
motion, I likewise utilize for that motion the stroke of a sinker and connect both
sinkers indirectly by means of strings so that plate d is constantly kept in a kind of
equilibrium.
The mechanism consists of a shaft which is carried above spring box f'. On
the one end sits two rollers and . From rollers a string leads downwards
over two rollers and y' carried by a shaft y. Both ends of the string now pass
upwards and one end of the string is attached to the lower bent end of sinker a',
the other end to sinker a³.
The sinkers a' and a² are indirectly connected with each other, through the
corresponding needles and f' and a small lever f" turnable on shaft in such
a manner that when for instance sinker a' is pressed backwards by its needle that
then the other is forced forward, that is to say if one is pushed away from the
knives then the other is pushed against them. The arrangement is contrived in
such a manner that the one sinker a which is connected with needle f³, is
constantly pushed into its normal position in the direction of arrow f' by means of
needle while the sinker a' which raises plate d lies over the knives. Both
sinkers then are at their lowest position, whereby the metal plate also is at its
lowest.
In this normal position sinker a¹ would be raised by the knife if needle f³ were
not pressed back, but when that is effected in the well known manner through the
batten striking in the direction of f³, then lever f' pushes the sinkers a³ before the
knives and presses sinker a¹. In the raising of sinker a' the string x moves from
roller from roller y' in the direction indicated by arrow fit thereby turns
roller as shewn by arrow f10. On the same shaft as that on which sits, sits
also roller, to which a string is fastened, which passes over a roller Z to plated
or is fastened to it in some way. The motion of string created by turning of
rollers and as shown by arrow f10 brings about the raising of the plate.
In order that this raising may happen uniformly the raising mechanisms are
attached to both sides of the plate. In order to fix plate d in its position when it
is at its highest or lowest point, a stop is attached to one side of shaft x on which
the two springs x', with connecting piece, act in the well known manner when
the shaft has sufficiently turned, (Fig. 54 B).
The motion of shaft x or rollers and is kept within limits by a pin on
roller which strikes against two fixed pins 0 and 11, so that ordinarily when
plate d is down then a strikes against 10 and when up then it strikes against ".
In order that when the sinker is raised the up and down motion of the plate may

page_text: be as free from jerks as possible, a spring is inserted in string *, besides there
is provided an elastic strings from roller ³ to a fixed point on the loom frame
which permits of the roller going back without jerking.
In the up position of plate d with sinker a' it would remain steady and the
operation with the common pattern or ground weft cards would take place in the
old manner, when it was not made possible for both the sinkers a' and a² to return
to their normal position and this is effected by spring of needle when the
openings of the batten card fit with openings and do and the corresponding
attachments d" and d¹.
The down motion of the metal card d is brought about by the sinker a² being
raised when sinker a' is not raised by being kept off by needle f
The hook u is raised in the same manner in order to postpone the turning of batten
cylinder g while the metal plate is in front, by suitably connecting it with strings a
and The turning of hook u' happens immediately when the knife box is raised,
before either batten g or plate d is raised for u' is directly connected with the part
of string which is attached to sinker a¹ by means of a non elastic string " which
passes over rollers Z! and Z.
The action of the machine is shewn by the schematically represented Figures 19
to 22. In Fig. 19 all is assumed to be at rest. Fig. 20 shows the knives partly
raised whereby hooks u is already raised, when cylinder g and plate d likewise
become raised ultimately taking the position shewn in Fig. 21.
In Fig. 22, cylinder g has again returned to the position shewn in Fig. 19, but
has now pressed needle back, whereby at the next stroke of cylinder y sinker a
is raised. At the same time hooks u¹ and string go back again.
When the batten goes down again then the position shewn in Fig. 19 is established
when needle f' is not again pressed back in the well known manner.
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 :-
:-
The means for periodically employing the plate d fully described in my Specifi-
cation No. 20901-1890 consisting in connecting such plate and hooks u' and u with
the sinkers substantially in the manner described and shewn in the drawings.
7603
BONNE & Co.,
57 & 58, Chancery Lane, London, W.C.,
Authorised Patent and Trade Mark Agents.
BONNE & Co.,
57 & 58, Chancery Lane, London, W.C.,
Authorised Patent and Trade Mark Agents.