Improvements in Jacquards.
Year: 1896

page_text: Date of Application, 29th June, 1895
Complete Specification Left, 29th Apr., 1897-Accepted, 26th June, 1897
Date of Application, 29th June, 1895
Complete Specification Left, 29th Apr., 1897-Accepted, 26th June, 1897
PROVISIONAL SPECIFICATION.
Improvements in Jacquards.
1, TOMAS ALBERT
ALBERT BRIGGS CARVER, of Heigham, Aubrey Road,
Hornsey, N., Civil Engineer, do hereby declare, the nature of this invention
to he as follows:-
My invention relates to improvements in that class of jacquards in which the
needles are controlled by electrical means.
Behind the horizontal needles I arrange a spring-box containing the usual springs
to act on the rear ends of the needles and adapted to receive a small horizontal
reciprocation in the direction of the needles and so arranged that unless the
needles are prevented from moving they will be carried forward by the springs
but should any needle he prevented from moving the corresponding spring will be
compressed.
The needles are supported horizontally at their front ends by passing through
plates in such a manner that they are free to slide longitudinally and carry with
them the usual vertical hooked needles, which engage or do not engage with the
horizontal knives according as the horizontal needles are or are not moved by the
reciprocating spring-box.
Immediately in front of each needle is arranged a small vertical armature of soft.
iron supported at one end in guides and controlled at its other end by a frame
having a small vertical properly-timed oscillation, the armature tending, owing to
gravity or by means of a spring, to remain in contact with the frame. Immediately
behind each armature and in the same vertical plane as the needle I place a small
vertical electro-magnet arranged to present both poles to the armature and
adapted to be energized by a current in the well known way whenever its
feeler comes into contact with an uninsulated portion of the metallic pattern-
plate.
The action is as follows:-If the electro-magnet is energized the armature will
be supported against the poles of the magnet and will not follow the frame as it
recedes, but will be retained directly in the path of the corresponding horizontal
needle which will thus be prevented from moving and the corresponding vertical
needle will not catch the knife. The compression of the corresponding spring
in the advancing spring-box causes the front end of the needle to exert a
sufficient pressure où the armature to tear it away from actual contact with the
poles of the magnet, and on the spring-box retiring if the magnet has ceased
to be energized the armature will return into contact with the reciprocating
frame. If the magnet is not energized the armature will remain in contact
with the frame and will form no obstruction to the forward motion of the
needles.
Dated this Tn minch don of tu 1906

page_text: I, THOMAS ALBERT BRIGGS CARVER, of Heigham, Aubrey Road, Hornsey,
Civil Engineer, 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:-
My invention relates to improvements in jacquards of the kind in which the
needles are controlled electrically, as I shall describe referring to the accompanying
drawings.
Figure 1 is a side view of one set of the ordinary horizontal and vertical needles,
with parts broken away and parts in section.
Figure 1 is a part sectional plan on X X of Figure 1.
Figure 2 is a side view of the lower parts of the conducting wires and the contact
feelers.
Figure 3 is a front view partly in section of the same, and
Figure 2 is a part plan of the clamping laths.
A are the vertical needles of the jacquard, B the horizontal needles which loop
round the needles A and are intermittently urged to the left and retracted by the
spring box C. When a needle B is urged to the left, its left end passes through
a hole in one side of an inverted trough shaped bar D, then through the space of
the trough and through the hole in its other side, unless it is stopped by an upright
keeper E being interposed in the space between the two holes at D, in which case
the spring in the box Cyields. The keeper E is a piece of soft iron, having its upper
end guided in the space of D and its lower end resting on a vertically reciprocating
bar F. At the side of the keeper, and touching it at both ends, so as to form a
closed magnetic circuit, is an electromagnet G having a core of soft iron of
rectangular section wound with a coil of insulated wire one end of which is
connected to the metal frame of the loom and the other end of which is carried
down to the contact apparatus hereafter described.
1f
The reciprocating bar Fascends and descends while the spring box C rests.
after it has ascended raising the keeper E the electromagnet G is excited so as to
attract the keeper, then when F descends the keeper is still kept up by the magnet's
attraction, and as the needle B makes its stroke to the left it stops the needle B
which however, by striking against the keeper, detaches it from the magnet, aud
the magnet being no longer excited, the keeper E as the needle B begins to retreat
to the right drops to its former position in the frame F. If when the frame Frises,
the magnet G is not excited, then when the frame F descends the keeper also
descends, and the needle 13 can then pass through the second hole at D. According
as the needle B is free to move or is stopped as described the corresponding vertical
needle A is moved to the left or is not moved, so that its hooked head is moved out
of the path or left in the path of the vertically reciprocating knife Z, the warps
governed by the needles A being thus either raised or not raised in forming the
shed of the web. Although I have shewn a row of 8 nee.lles A in one plane, this
number might obviously be varied, and the numbers of such rows, one behind the
other, may also be varied; I have shewn in the drawings arrangements suited
for 50 such rows, making in all 400 needles.
The coil of each of the electromagnets G has its one end connected in any
convenient way to the fixed metallic frame of the machine which is itself
electrically connected to one terminal say the terminal of a suitable battery
or other source of electricity. The other ends of the insulated coil wires are
first led through pairs of clamping laths H, which may be of wood, there being
a pair of these laths for each row of wires from side to side, that is to say 50 wires

page_text: in each pair. From these clamping laths all the wires are led down to another set
of clamping laths I piled on one another, bends of the wires as shewn in Figure 2
being pressed between the laths so as to prevent the wires from shifting lengthwise.
From the clamping laths I the wires are led side by side almost close together,
through a clamp M all terminating in bent ends or feelers J which are bare of
insulation and bear lightly on a pattern sheet K which is moved step by step over
a metallic pad L connected to the + terminal of the source of electricity a switch.
being preferably interposed to break the circuit except when the magnets have to
operate. The pattern sheet K is of thin metal of good conductivity, such as.
copper, which is covered with a non-conducting varnish or other coating except
where the figure of the pattern presents the bare metal. Obviously, instead of
moving the pattern sheet K over a pad L. the sheet may be wound on a drum
or led over a roller to which a step by step movement is given. All the feelers J.
that at each step of the pattern sheet happen to be bearing on the bare metal are.
thus put in circuit with the source of electricity and the magnets G to which they
lead are excited, while those feelers J which happen to be bearing on the non-
conducting coating of the pattern sheet are not in circuit and consequently the-
electromagnets G to which they are connected are not excited. Thus the form.
of the pattern on the sheet K determines the raising or not raising of the warps
connected to the vertical needles A and so determines the reproduction of the
pattern ou the web. I have not thought it necessary to shew mechanism for
reciprocating the knives Z, the spring box C, the reciprocating bars For for
moving the pattern sheet K, as this mechanism may be of any known kind employed.
in Jacquard looms, and forms no part of my invention.
The clamp M is preferably provided as shewn with a trunnion M' at each end
on which it can be turned, when desired, thereby raising all the feelers J off the
pattern sheet K.
Having now particularly described and ascertained the nature of my said.
invention and in what manner the same is to be performed, I declare that I
make no general claim to controlling electrically the needles of a jacquard, but
what I claim is :-
1. In combination with the horizontal needles of a jacquard, vertical electro-
magnets and keepers one for each needle, the coil of each electro-magnet having
its one end connected to one terminal of a source of electricity and its other end to
a feeler bearing on the surface of a metallic pattern sheet connected to the other
terminal, the said sheet being covered with a non-conducting coating except the
figures of the pattern, arranged and operating substantially as described.
2. In apparatus such as is above referred to, the combination of the trough
bar D having holes for passage of a needle B, the electro-magnet G and the
keeper E carried on the reciprocating bar F, and parallel and close to the
magnet G so as to form with it a closed magnetic circuit, substantially as and
for the purposes set forth.
3. In combination with the conducting wires of the electro-magnets G the:
clamping laths H and I and the clamp M arranged substantially as described.
Dated this 20th da
A 1007
ABEL & IMRAY,
Agents for the Applicant..