Improvements in Needle Threading Devices for Sewing Machines.
Year: 1896

page_text: Improvements in Needle Threading Devices for Sewing Machines.
A communication from SAMUEL JULES CHOUTEAU, Jeweller, and CHARLES DUPUIS,
Engineer, both residing at Montier-en-Der, Department of Haute-Marne,
France.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex;
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:
This invention relates to an automatic needle threading device which serves to
cause the thread to automatically pass into the eye of the needle of sewing.
machines. Its construction is very simple and consists of:-
1. A metal frame of special shape.
2. A kind of pair of scissors.
3. A small carriage.
The frame may be made of copper or any other suitable material and in ons
piece.
The scissors are constituted as follows:-A steel blade chamfered like a blade
of a pair of scissors is fixed to the frame by means of two screws.
The co-operating part of the second blade is a movable piece also of steel and
chamfered like the first one and is movable round a screw. This blade is moved by a
rod provided with a knob.
The end of the rod is cut out like a whistle and presses directly against the knife.
The length of the part of the rod cut out like a whistle is slightly greater than the
width of the small carriage. A piece is pivoted on a screw and is held at the other
end by a small screw with a conical head. This adjusting screw serves for directly
bringing the eye of the knife in front of that formed by the blade and by the frame.
A screw with a wide head guides the knife and forces it to press against the
other blade so as to cause the thread to be neatly cut. A small cylindrical steel
spring forces the first blade to resume its original position when the knob is pulled.
The carriage is formed by a copper piece to which is secured by means of two
screws a small spring. This piece ends in an arched rod. The thread easily intro-
duced between the orifice formed by the spring and rod is pinched at the lower
part.
The method of securing the said apparatus on the frame of the sewing machine
differs according to the kind of the machine to which it is to be attached. When
applied to a Davis (New Howe Co.) machine it consists substantially of a suitably
shaped copper piece a continuation of which extends to the side face of the presser.
It serves for supporting the part on which is fixed the threading device.. The
attachment is effected by means of a small nipple and a screw on another part is
formed a part forming a stop under the screw holding the needle.
Operation of the apparatus. The needle is placed at the lightest point by turn-
ing the wheel by hand; the apparatus is brought against the needle, the part

page_text: forming the stop strikes under the screw and thus fixes the position of the needle.
The thread is passed into the opening formed by the carriage and into that formed
by the knife. The knob is pressed and the thread is cut. In the moment when
the movable knife presents its opening, the thread is caused to move by the
carriage and passes into the opening of the knife and into the eye of the needle;
then it has only to be pulled by hand or, y special pincers. "It is sufficient to pull
the knob to again bring the apparatus in readiness for use.
The apparatus which is pivoted round the presser, is turned back the pincers
rise, and nothing prevents access to and operation of the machine.
Dated this 4th day of August 1896 11
2
BOULT & WADE,
Agents for the Applicant.
COMPLETE SPECIFICATION.
3
Improvements in Needle Theading Devices for Sewing Machines.
A communication from SAMUEL JULES CHOUTEAU Jeweller, and CHARLES DURGIS,
Engineer, both residing at Montier-en-Der. Department of Haute-Marne
France.
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ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, 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 present invention relates to a device arranged to pass the thread previously
Longitudinally arranged on one of the parts of the apparatus, into the eye of the
needle of a sewing machine without necessitating any other movement except the
pressing in of a rod; so that a child or even a blind person could with the greatest
ease effect the threading of the needle of a sewing machine.
The device chiefly consists of 4 parts; a support, a sinall carriage, a cutter and
an operating rod.
The apparatus is shown on an enlarged scale in the accompanying drawings in
which Fig. 1'is a plan, Fig. 2 an elevation and Fig. 3 a section of the apparatus.
The s
e-support A is secured to the frame in any desired manner, but so as to have
the eye of the needle exactly in front of a groove B into which the thread is placed;
and so as to enable the support to be raised and lowered in order to prevent it from
interfering with the travel of the needle and of the fabric.
The support A has two branches A' A2 between which the carrier C moves guided
by two spindles D and E and carrying two flat plates F and G which nearly touch
each other and between which the thread is passed. The carriage is caused to move
by means of a rod H secured to the rod I: The latter passes through "both
branches A A2 of the support and has a certain amount of free movement in the
hole of the branch A. The end of the rod is cut so as to form an oblique or
bevelled edge.
On the branch A2 are fixed two cutting blades, one of which J is fixed, the
other K being pivotted about the pivot L. The movable blade K carries a small
extension- Min engagement with a spring N, and is operated by the lever O
pivotted on the pin P, said lever rests on the rod I, and is provided with a recess 01,
which comes in front of the groove B in the branch A2 'of the support A when the
lever is in its raised position. At its ends the lever passes between the wall of the
support and the head of a screw Q so as to prevent the lever from moving laterally;
the result of which would be to catch the movable blade of the cutter between

page_text: the lever and the wall of the support. When it is desired to thread the needle
the thread R is placed between the two parts F and G of the carrier C, the end of the
thread passes through the groove or opening B; then the rod I is pushed in. The
end of the rod being formed with a bevel as shown, and the lever Oresting directly
on the rod, when the latter advances, the lever will rise, raising the blade K, until
the lever bears on the cylindrical portion of the rod; by this movement the thread,
between the two scissor blades, is cut. The latter operation takes place without
any advance of the carriage for the rod H is arranged so as to strike against the
wall of the carriage only when the thread is cut. Then the carrier moved by the
rod H advances, pushes the thread across the free space of the groove under
the scissors and introduces it into the eye of the needle placed directly in front.
By drawing the rod I back the carriage resumes its original position, the
spring N acts on the pivotted scissors blade K and pushes it together with the
lever which is again applied against the wedgd or bevel shaped portion of
the rod I. As the size of the needle generally varies according to the thickness of
the unread, there is fixed on the lever a finger, the head S of which forms an
eccentric. This eccentric portion of the finger bears directly against the needle:
by slightly turning the finger the eccentric presses against the head of the needle
and causes the latter to advance or to recede so as to place the eye directly opposite
the groove B of the threading device. A small screw V fixed on the branch A² of
the support also acts on the rod I, by screwing or unscrewing this regulating screw,
the operating rod and at the same time the lever and the pivotted scissors
blade K are caused to rise or descend, so that the position of the hole for the passage
of the thread left between the scissors and the recess in the lever may be
regulated according to the position of the needle.
The working of this apparatus is therefore very simple the end of the thread is
placed between the two plates F and G of the carrier C, the rod I is pushed in
whereupon the thread is cut and introduced into the eye of the needle. Then the
operating rod is returned into its original position and the support is raised so as
to render the needle and the table completely free for work.
Having now particularly described and ascertained the nature of the said
invention as communicated to me by my foreign correspondents and in what
manner the same is to be performed I declare that what I claim is:-
1. A needle-threading device consisting of a rod I having a bevelled or wedge
shaped end and means whereby it operates first a blade to cut the thread and a
read carrier to move the thread forward and cause it to enter into the eye of the
reedle placed in front and a regulating screw and an eccentric for adjusting the
relative position of the eye of the needle and of the groove of the needle threading
device, substantially as described.
2. The Lination and arrangement of parts constituting the complete needle-
threading device substantially as described and illustrated in the accompanying
drawings.
n
ALFRED J. BOULT.