Year: 1888

page_text: I BENJAMIN HALLATT Foreman, in the employment of Benjamin Walker and
Company, of Old Lenton in the County of Nottingham, Lace Manufacturers 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 carrying out my improvements I either employ jacks operated by two locker
bars as shown at Figures 1, 2 and 3, or two series of spring jacks shown at
Figures 4 to 8 inclusive.
The first arrangement. consists in adding an additional locker bar to the jack
locker bar heretofore used for operating the jacks in the manufacture of twist lace,
and in forming the jacks of such a shape or shapes as to enable them to be operated
by the additional locker bar by which means I am enabled. to produce novel effects
in the net or fining, and make four varieties of cloth work. When working with
coloured threads I can operate the jacks so as to produce four combinations in
colours.
The jacks A I form of either of the several shapes shown at Figures 1. 2 and 3
which are side views looking from the right end of the machine, the jacks are sup-
ported by and slide in three sleys, the upper selecting ends of the jacks slide in a
jack sley bar B, the lower part of the jacks are supported by and slide in a sley C at
their front end and a sley D at their back end in the usual way.
The threads to be selected by jacks of either shape are passed through the guides
of three bars, arranged as shown, the back bar 1 and the central bar 2, being each
supplied with threads from spools, and the front bar 3, with threads from a warp
beam or spool threads may be supplied to the front bar 3, and the warp threads to the
back bar-i, or-the-central bar 2 according to requirements.

page_text: When the double and reversely cranked jacks A shown at Figure 1 are left down
by the jacquard they engage with the jack locker bar E usually employed which
pass the selecting ends or heads of the jacks through the spool or warp threads
carried by the back guide bar 1, the jacks selected by the jacquard engage with an
upper locker bar F which pass the heads of the jacks through the spool or warp
threads carried by the guide bars 1 and 2, at each lift of the jacquard by which means
the coloured threads of each bar are stopped off, that is to say if both bars are
traversed three or four gates to make clotliwork, the coloured threads of either bar
are stopped by the jacks, while the coloured threads of the other bar are making
cloth work, the threads of either bar making three or four gate cloth work according
to the pattern required.
The same effects may be produced by employing single cranked jacks A, a jack
locker bar E, and an upper locker bar F1, arranged as shown at Figure 2, the bar E
operating the jacks which are left down by the jacquard, and the bar Fí, operating
the jacks which are selected.
Or the same effects may be produced by employing double cranked jacks A of the
shape shown at Figure 3, a jack locker bar E, and an upper locker bar F¹.
The bar E operating the jacks left down and the bar F', operating the selected
jacks, according to the pattern.
In the second arrangement I employ two sets of spring jacks H and H' shown at
Figures 4, 5, 6, 7 and 8 which are side views, both sets are cast in leads, a back
view of one lead of each set, and a few jacks are shown in their relative positions at
Figure 8, the jacks H are somewhat longer than the jacks H2 of the other set, the
stems of the jacks H are behind and placed opposite the space between two of the
jacks H2 in front of them, the upper ends of the jacks H are bent to the shape shown
so as to lie over and be in a vertical line with the head of the jack H2 to the right in
front of it, so that the heads of both jacks lie in one trick of the bar I, the leads of
the jacks H are secured to and are carried by a lower jack bar Hand the leads of
the jacks H2 are secured to and are carried by an upper jack bar H³, both jack bars
are rocked by levers operated by cams in the usual way.
Each set of jacks are operated by a separate jacquard according to the pattern
required by a jack string H being attached to each jack, when a selection is made,
the selected jacks are as shown at Figure 4 held back clear of the spool or warp
threads while the unselected jacks are passed into the threads by the movements of
the jack bars H' and H³.
At Figure 5 the whole series of jacks H are shown clear of the threads, while
some of the jacks H' have their heads passed through the threads by the movement
of the jack bar H³ the other jacks H2, being kept clear of the threads by the selection
of the jacquard.
At Figure 6, the whole series of jacks H' are shown clear of the threads, while
some of the jacks H have their heads passed through the threads by the movement
of the jack bar H¹ the other jacks H being kept clear of the threads by the selection
of the jacquard.
At Figure 7 some of each series of jacks are shown having their heads passed
through the threads by the movements of both the jack bars Hand H³ while the
heads of the other jacks of both series are kept clear of the threads by the selection
of the jacquards.
Thus by employing two sets of spring jacks, each set being carried by a separate
jack bar, each bar having a positive motion, and the heads of both sets of jacks being
in one trick bar, I am enabled to drive the machine at a greater speed than is possible
when employing one set of jacks, and am enabled to make all kinds of combination,
imitation, swiss and coloured fabrics required, and at the same time effect a
considerable saving in the reading of the pattern, and the punching of the cards.
I am aware that top locker bars have been employed before to insert the jacks
selected by the jacquard but I am not aware that heretofore top locker bars have been
used to withdraw the jacks.

page_text: Having now particularly described and ascertained the nature of my sa
Invention and in what manner the same is to be performed I declare that wh
I claim is :-
:―
1. The construction and employment of double cranked jacks A, and an upper
locker bar For F¹ for inserting and withdrawing the jacks in addition to the usual
locker bar E as shown at Figure 1.
2. The construction and employment of two jack bars H¹ and H³ and two series of
spring jacks H and H the jacks H being bent near the head and somewhat longer
than the jacks H the heads of both jacks lying in the same trick of the bar I as shown
at Figures 4, 5, 6, 7 and 8 the whole substantially as described for the purposes set
forth and illustrated in the drawings annexed.
חד
11000