Improvements in Embroidery Machines.
Year: 1889

page_text: Date of Application, 20th Aug., 1889
Complete Specification Left, 20th May, 1890-Accepted, 16th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in Embroidery Machines.
1, JULES MATHIEU, of 5 Rue Mazagran, Paris, in the Republic of France,
Engineer, do hereby declare the nature of this invention to be as follows :-
The main object of this invention is to provide an attachment applicable to
embroidery machines in general, but specially to machines of the Bonnaz and Cornely
type, whereby two or more gimp cords or metallic threads may be twisted together,
while being attached to the work by the sewing thread, and also to provide a dis-
engaging device, whereby the embroidery attachment may be disengaged from the
machine, to refill or change the bobbins, or for other purposes.
Hitherto, in machines of this class, only one gimp cord or thread has been employed,
so that when a parti-coloured or clouded (ie., shaded) effect was required, the attached
cord had to be twisted previous to being wound upon the bobbins. This previously
prepared parti-coloured or shaded cord necessitates considerable additional expense,
and in the case of its being formed of metallic threads, in whole or in part, rapidly
deteriorates.
This attachment consists of a toothed disc or spur wheel mounted loosely, in a
horizontal position, upon the hollow shaft of the needle bar, immediately below the
bracket head of the sewing machine. Pendent from the under side of this wheel or
toothed disc, are two or more bobbins of gimp cord or metallic thread. Guides for
these threads are adjustably attached to the hollow boss of the toothed disc, and extend
down to near the work.
This bobbin carrier receives a partial rotation during each reciprocation of the
needle bar, by means of a pinion (suitably proportioned to the size of the wheel carry-
ing the bobbins), gearing into the wheel. This pinion derives its rotary_motion,
through a train of gear wheels, from the main shaft of the sewing machine. The feed
bar is suitably cranked out, to enable it to clear the bobbins and their carrier.
The driving pinion is mounted loosely on its vertical shaft, and its boss is notched
to receive a tang or stud carried by the shaft. The pinion is held in its interlocking.
position by the pressure of a coiled spring. On drawing down the pinion out of gear
with the wheel, against the pressure of the spring, and then giving it a partial turn,
the embroidery attachment will be disengaged from the machine, and remain quiescent
until again required.
It will be understood that during each reciprocation of the needle bar, a partial
rotation of the bobbin carrier takes place, carrying the gimp cords, or inetallic threads,
a determinated distance around the needle or its loop, one of these threads being in
advance of the needle, and across the line of sewing. The further rotation of the
bobbin carrier, during successive reciprocations of the needle bar, will bring each of
the threads in succession across the line of sewing, at the same time twisting the
several threads together, to form a solid cord, which will be attached to the work by
each of its component threads in succession.
'Dated this 20th day of August 1889.
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page_text: i
1
COMPLETE SPECIFICATION.
Improvements in Embroidery Machines.
1 JULES MATHIEU of 5 Rue 'Mazagran, Paris, in the Republic of France, 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:
The main object of this invention is to provide an attachment applicable to
embroidery machines in general, but specially to machines of the Bonnaz and Cornely
type, whereby two or more gimp cords or metallic threads may be twisted together
while being attached to the work by the sewing thread, and also to provide a dis-
engaging device whereby the embroidery attachment may be disengaged from the
machine, to refill or change the bobbins, or for other purposes.
Hitherto, in machines of this class, only one gimp cord or thread has been employed,
so that when a particolored or clonded (ie., shaded) effect was required, the attached
cord had to be twisted previous to being wound upon the bobbins. This previously
prepared particolored or shaded cord necessitates considerable additional expense,
and in the case of its being formed of metallic threads, in whole or in part, rapidly!
deteriorates.
In the accompanying drawing,
Fig. 1 is a front elevation, and
Fig. 2 a side elevation, of the head of a Bonnaz machine, adapted to effect the
object of this invention, and provided with four bobbins.
As the Bonnaz sewing machine is well known, it will only be necessary to describe
the new parts constituting the present invention.
Upon the hollow sleeve A of the needle bar is mounted loosely a spur wheel D,
which is retained in position by a ring secured by a clamping screw to the hollow
sleeve A. To the wheel D, are fixed 2, 3, 4, or more arms F, carrying the bobbins G,.
the number of which depends upon whether it is desired to embroider with two, three,
four, or more metallic threads, gimp cords, or chenille &c. A corresponding number
of thread guides E may be fixed to the boss or socket e of the wheel D, or to the
arms F.
These thread guides are attached to the socket e, by screws f, and their height can
be adjusted in the grooves f¹, in which are seated the heels of the guides E. These
guides E carry each a thread guide eye g, through which passes the cord g¹ from the
corresponding bobbin on its passage to the guide eye f, and from which it passes to
the needle. Rotary movement is given to the spur wheel D from the pinion I, fitted
on the vertical shaft B, which receives its motion from two spur pinions c d (of which
the one is loose upon the shaft C that governs the direction of feed, and the other is
fixed on the main shaft C of the machine), and two bevil pinions a b, the pinion a,
which is in one with the pinion d, running loose on the shaft C', and the pinion b
being fast on the shaft B.
The pinior I has a socket or boss i, having a notch into which takes the tang j
thus making connection with the collar h of the intermediate vertical shaft B.
It is mounted loosely upon the shaft B, and is held in position by the helical
spring k bearing on the screw. nut k¹.
The action of the machine is as follows:-
The shaft C, receiving its motion from a driving wheel or pulley, transmits it (when
the machine is coupled up), by means of the wheels dc and bevil wheels a b, to the
shaft B, upon which is mounted the pinion I in gear with the wheel D, which carries
Found the bobbins G and thread guides E.
The wheels D and I are calculated in such manner, that when D has made one
rotation, each cord is fixed to the work by a chain stitch, that is to say, when
4 bobbins are employed, as shewn in the drawings, the needle will make 4 ascents and
descents during one rotation of the wheel D.

page_text: Assuming that the needle has made a vertical movement, the cords, before being
fixed by the needle at its next descent, are twisted, and are thus formed into one by
the movement of rotation of the bobbins around the needle, which, so to speak, locks
the sewing thread, and prevents the embroidery becoming unsewn.
To stop the action of the embroidery apparatus for the purpose of rewinding the
bobbins, or for other reasons, the apparatus is disengaged from the machine by pulling
down the pinion I out of gear with the wheel D, and turning it a quarter of a rotation,
by which the tongue ; will be prevented from entering the notch i.
It will be understood that a greater or less number of bobbins and thread guides
may be applied.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
-
1. In embroidery machines, the combination with the needle bar, of a rotating
support for two or more bobbins and thread guides, such support receiving rotary
motion from change gear suitably driven, whereby the thread from each bobbin is
brought successively across the path of the needle, to be separately sewn down to the
work, and the threads are twisted to form a cord, as set forth.
2. The means, as shown and described, for disengaging the bobbin support from the
driving mechanism.
101
CLI 1000
NEWTON & SON,
Agents for the Applicant.