Improvements in Fancy Stitch Sewing Machines.
Year: 1897

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Chief Examiner of the 12th day of November 1897.
Date of Application, 7th May, 1897-Accepted, 3rd July, 1897
COMPLETE SPECIFICATION (AMENDED).
Improvements in Fancy Stitch Sewing Machines.
We ROBERT BROWN of Gordon Terrace, Agincourt Avenue, Belfast, in the County
of Antrim, Warehouse Manager, and JOHN QUINN of Dublin Street, Ballymaccaret,
Belfast, in the County of Down, Mechanic, 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:-
This invention relates to sewing machines in which fancy or ornamental stitches
*shire stitch"
are produced such as what are known as "spoke stitch" and
by
incans of two needles operating in conjunction with a punch one needle on either
side.
This invention is designed to provide improved mechanism for controlling or
actuating such needles and for maintaining the shuttles always in the same relative
position to the needles.
The invention will be fully described with reference to the accompanying
drawings which as an example show it applied to a machine for overseam stitching
with oscillating hooks of the Singer type.
Fig. 1. Side elevation from the back partly in section.
Fig. 2. Plan (partly in section) with the top plate and framing removed.
Fig. 3. Plan looking from beneath.
Fig. 4. End elevation (showing the gearing end of the machine).
Fig. 5. Enlarged front elevation of needles and needle clamps.
Fig. 6. Side elevation of same.
Fig. 7. Back elevation of same showing needles closed to the punch.
Fig. 8. Back elevation showing the needles open or moved out of contact with
the punch.
Fig. 9. Side elevation of punch.
The frame A of the machine the main horizontal driving shaft B the vertical
shaft C the needle bar D and the thread lever E are all constructed arranged and
operated in the usual way.
To the reciprocating needle bar D we affix at the lower end a cross head D' to
carry two needles . The needles & dare carried in clamps F F which are
mounted upon the cross head D₁ by means of a dovetail shaped groove so as to
be capable of moving or sliding to and fro thereon, by which movement the
needles d d can be moved towards or away from the punch G. The punch G is
secured in a hole in the centre of the needle bar D by a set screw g.
Between the sliding needle clamps F F is pivoted a cam H which is oscillated
about its centre by a connecting rod h. This cam when oscillated from the position
shown in Fig. 7 to that shown in Fig. 8 moves the sliding needle clamps F F
When the cam His
apart and moves the needles away from the punch G.

page_text: .
returned to the position shown in Fig. 7 the sliding needle clamps are drawn back
by the springs f.
The punch G is made with grooves down the sides in which the needles d d lie
when pressed close to it and near the point it is provided with a hole g which
enables the points of the needles to lie so close together as to touch one another.
The connecting rod h which actuates the sliding needle clamps is attached at its
other end to a swing link K which receives a reciprocating movement from a
cranked lever or fork to which a to and fro movement is imparted by pivoted
quadrant lever L through the connecting rod kl.
The shuttles or hooks M are of ordinary construction (those illustrated being of
the Singer design) oscillating to and fro beneath the needles and they are actuated
in the usual way by the connecting rod m and rotating disc and crank pin c on
the foot of the vertical shaft C.
+
Each of the shuttles or hooks M we mount in shuttle races attached to pivoted
shuttle race carriers or boxes N N' capable of being oscillated backwards and
forwards to and from each other to correspond with the movement given to the
needles so that as the position of the needles is changed the shuttles are also
changed thus maintaining the relative position of needle and shuttle constant thus
avoiding any risk of missing stitches which would otherwise occur.
The shuttle race carriers or boxes NN¹ are actuated by the rods n'n' connected
to the oscillating quadrant lever L by which the needles are actuated thus ensuring
a synchronous movement.
The quadrant lever L is actuated in one direction by a cam P acting upon the
arm of the lever L and drawn back by the spring. The cam P is carried by
pinion protated by a pinion O on the vertical driving shaft C.
The feed mechanism consists of a toothed or serrated feed bar R of ordinary
construction with both vertical and lateral movement operated by oscillating bars S
and T one placed at each side of the machine beneath the horizontal plate of the
frame A. Motion is transmitted to the bars S and T from the cam U by the
connecting rods sand and cranks s' and 't. The cam U is provided with pinion
teeth around the periphery and is rotated by a pinion u on the end of the horizontal
driving shaft B.
The arrangement of sliding needle clamps and the movable shuttle race carriers
or boxes is applicable for either an overseaming stitch or a hemstitch.
g
The construction of the punch G with a hole y enables the needle points to come
close together thus obviating any risk of the threads becoming jammed or caught
between the needles and the punch when the needles are closed in to punch and
also enables the machine to make a narrower stitch with less space between the two
rows of stitches by allowing the needles to come closer together or touch at their
points:
When the machine is in operation the punch G with the two needles denter
the material at the same time making one hole and forming the stitch inside it
at the next stibke of the needle bar before the material is foil forward the punch
ngain enters the first hole and the needles being moved away from the punch pass
into the material at the side of the hole and complete the stitch around the holo
made by the punch before the material is carried forward from the punch and
needles. This enables a curved or circular line of stitching to be made on the
article and enables the stitching to be stopped at any point without the necessity
of carrying it over the edge of the material.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim is: ±
1. In a sewing machine by which fancy or ornamental stitching is produced
and having two needles placed at either side of a punch and which are moved to
and from the punch alternately the combination with the said needles of recipro-
cating shuttle race carriers or hoxes to carry the hooks or shuttles which are

page_text: caused to move simultaneously with the needles so that the shuttles shall always
maintain the same relative position to the needles substantially as and for the
purpose described.
2. In a sewing machine for producing ornamental or fancy stitching the com-
bination with the needle bar of a cross head carrying two sliding needle clamps
operated by a connecting rod substantially as described.
3. A sewing machine for producing fancy or ornamental stitching constructed
with reciprocating or oscillating shuttle race carriers or boxes which move to and
fro simultaneously with the needle substantially as described.
4. A sewing machine for producing fancy or ornamental stitching having the
several parts constructed and arranged in combination substantially as described
and shown.
Dand thin n0th to of t
1907
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.