A NEW OR IMPROVED ATTACHMENT FOR SHUTTLE SEWING MACHINES, CHIEFLY APPLICABLE FOR SEWING BUTTON-HOLES
Year: 1883

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesex for an
Invention of A NEW OR IMPROVED ATTACHMENT FOR SHUTTLE SEWING
MACHINES, CHIEFLY APPLICABLE FOR SEWING BUTTON-HOLES-a communication
to him from abroad by Julius Gutmann, of Berlin, Germany,
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 21st April 1883.
"
HERBERT JOHN HADDAN, of Kensington, Middlesex, "A NEW OR IMPROVED
ATTACHMENT FOR SHUTTLE SEWING MACHINES, CHIEFLY APPLICABLE FOR SEWING
BUTTON-HOLES," a communication to me from abroad by Julius Gutmann, of
Berlin, Germany,
This invention is applicable to any shuttle-sewing machine, in which the shuttle
moves perpendicularly to the motion of the cloth.
It comprises a device for shifting a slide applied to the head of the needle bar
and carrying the needle, which device consists substantially of a lever adapted to
receive from the machine-shaft an oscillating motion and to transmit this motion
on the said slide by contact with a second slide guided parallel to the first slide.
Also the application to the said second slide; of a straight guide placed at a
right angle to the motion of the slides, and in which moves a pin connected with
the needle-carrying slide.
0
The invention also consists in setting the apparatus out of gear by means of a
slide applied to the extremity of the above-mentioned oscillating lever; the said
slide being drawn out of the cross groove or cam mounted on the machine shaft
and by which the motion is controlled.
-
Also in the application of an adjustable stop or contact-piece to the said oscil-
lating lever, for the purpose of obtaining a narrower or wider button hole seam,
the said contact-piece being adapted to accelerate or retard the contact with the
second slide, and thereby to increase or diminish the travel of the same.
The invention also comprises an appliance for shifting the needle-carrying
slide, which appliance consists chiefly of a lever moved from the driving-shaft of
the sewing machine by means of a cam or excentric, said lever being adapted; by
means of a pawl and ratchet-wheel, to produce half a revolution of a curved disc
or wheel which effects the motion of the slide by means of a lever and rollers.

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SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
20th October 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex, " A NEW OR IMPROVED
ATTACHMENT FOR SHUTTLE SEWING MACHINES, CHIEFLY APPLICABLE FOR SEWING
BUTTON-HOLES," a communication to me from abroad by Julius Gutmann, of
Berlin, Germany,
This invention relates to an attachment which may be screwed to the front of
any shuttle sewing machine, in which the shuttle moves perpendicularly to the
motion of the cloth, and by means of which device button holes and seams may be
conveniently sewn over.
The invention substantially consists in the following improvements:
Instead of connecting the needle directly with the needle bar it is held by a
slide fixed to the latter and by means of which slide the needle may be shifted
parallel with itself in addition to its perpendicular motion.
In further describing this invention reference will be made to the accompanying
drawings Fig to 10.
To the front part of a Singer machine is screwed in the rear a cast iron plate a
bearing the pivot b of a lever c. At the upper end of this lever is fixed the block d
guided in a double curve e. This double curve is situated on the upper shaft of
the machine immediately behind the, cam wheel which moves the needle bar up
and down. In a projection at the lower part of the plate a is guided a round
slide provided with a radial pin g and when the upper end of the lever c is moved
towards the right by means of the double curve e and the block d. the lower end
of the lever o presses against the pin g of the slide f and thereby moves the latter
towards the left, while a spring h tends to push the slide again in the opposite
direction. At each revolution of the machine shaft the block d is guided alter-
nately in the two grooves of the double curve e in consequence of which the slide f
remains at rest in a given position alternately on the right and on the left.
To the front end of the slide f is screwed the slotted angle plate i, the slot of
which is parallel to the needle bar k. When the needle bar is moved up and down
the pin slides in the slot of the angle plate i.
The travel of the slide m carrying the needle, must vary according as a button
hole is to be hemmed or sewn up.
For this purpose the travel of the slides m and towards the right is limited
by a cam o provided with a handle and which comes in contact with the pin g.
If the cam o is turned round its pivot p so as to come in contact with the pin q
(Fig 2) the slides will be allowed to travel as far as is necessary for the sewing up
of the button holes.
For making an ordinary seam by means of the machine, the block d need only
be detached from the double curve (curved groove).
The block & is pivoted on the pin of the lever c and the pin r is narrowed
towards the outside and terminates in a knob 8.
In the sleeve or bush of the lever c receiving the pin and wound round the
latter is situated the helical spring t, which maintains the block d pressed in the
curved groove.
The sleeve is provided at its outer edge with a wide recess (Fig 5) which receives
the pin u of the knob 8. By pulling the knob a and then alightly turning the
same the pin u forms a stay between the knob and the outer rim of the sleeve
whereby the helical spring is maintained in compression, and the block & mounted
on the pivot r is removed from the double curve.

page_text: The slide fis now firmly fixed in its extreme position on the left (Fig 2) by
tightening the screw (Fig 4), and the whole apparatus is set out of gear.
By loosening the screw and turning the knob 8 back, so that the pin u again
enters the recess in the rim of the sleeve, the apparatus may again be set in
operation.
The manner of fixing the needle in the slide m is represented in Fig. 6 and 7 in
two modifications.
In the arrangement represented by Fig 6 the needle is fixed in the slide by
means of a screw only while in the arrangement represented in Fig 7 the slide
contains another piece of prismatic shape one end of which is screw threaded,
passes through the other side of the slide and holds a small nut X. The needle bar
is passed through the prismatic opening of the slide and fixed by means of the
piece g when the screw is tightened.
At the lower end of the lever c is fixed a leaf spring y which comes in contact
with the pin g of the slide f. The spring y may be adjusted by means of the
screw (Fig 2 and 4) whereby the pressure of the spring against the lever c and
consequently the travel of the slides f and m and the breadth of the stitch may be
regulated at will.
Fig 8, 9 and 10 represent modifications of the arrangement for shifting the
slide m.
In front of the cam or heart wheel which moves the needle bar is placed a disc b
provided at its front side with a projection a. This disc b during its rotation
causes a lever c which is continually pressed against the disc by means of a spring d
to oscillate.
The lever c is provided at its upper end with a small pawl f which is continuously
pressed against the ratchet wheel h by means of a spring g. Mounted on the same
axle and firmly connected with the ratchet wheel h is a cam wheel k having half
the number of teeth of the ratchet wheel h. The teeth of the cam wheel are con-
siderably rounded off, and a roller fixed to the upper end of the lever n pivoted
at is pressed against the teeth of the cam wheel k by means of a spring i. The
lower end of the lever n is suitably connected with the slide m carrying the
needle.
When the shaft of the machine is turned, the projection a of the disc b imparts
a to and fro motion to the lever c, and the lever c by means of the pawl fimparts
to the ratchet wheel h and consequently also to the cam wheel k a motion corre-
sponding to one tooth of the ratchet wheel.
The roller of the lever n pressed by the spring i against the cam wheel arrives
at each revolution of the machine shaft either at the highest point of one of the
teeth or between two of the teeth of the cam wheel whereby the lever n which
actuates the needle slide, is moved either to the left or to the right.
CLAIMS:
1. An appliance for shifting the needle-carrying slide situated at the head of the
needle bar, which appliance consists substantially of a lever adapted to receive
an oscillating motion from the machine shaft and to transmit such motion
upon a slide by its impact with a second slide guided parallel to the latter.
2. In the second slide which transmits upon the needle carrying slide the motion
of the lever mentioned in the preceding claim, the application of a straight
guide placed at a right angle to the motion of the slide and in which is
movable a pin connected with the needle carrying slide.
3. Setting the apparatus out of year by withdrawing a alida blook
11

page_text: !
.
5. An appliance for shifting the needle-carrying slide, consisting essentially of a
lever set in motion from the driving shaft by means of a cam or eccentric and
adapted to turn a cam wheel half a division by means of a pawl and ratchet-
wheel, which turning motion of the cam wheel is made to act on the slide by
means of a lever and a roller.
In witness whereof I the said Herbert John Haddan have hereunto set my
band and seal this 20th day of October A.D. 1883.