Improvements in Overseaming and Fancy Stitch Sewing Machines.
Year: 1897

page_text: Date of Application, 10th May, 1897-Accepted, 3rd July, 1897
COMPLETE SPECIFICATION.
Improvements in Overseaming and Fancy Stitch Sewing Machines.
We, THE SINGER MANUFACTURING COMPANY, Sewing Machine Manufacturers,
Kilbowie, Dumbartonshire, and HUGH COUSLAND, Sewing Machine Expert with
said Company, 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, which relates to overseaming and fancy stitch sewing machines,
has for its object the provision in button hole sewing machines of improved devices
for shortening or stopping the feed and lengthening the overseaming throw of
the needle bar during the operation of barring button holes, and also for varying
either the feed or overseaming throw during the sewing operation in other sewing
machines in order to produce fancy stitching.
The Invention is illustrated by the accompanying drawings in which figure 1 is a
side elevation, figure 2 a plan and figure 3 an end elevation of a button hole
sewing machine showing the improved devices for controlling the overseaming
throw and feed.
The sewing machine is of a well-known type having the usual bed plate A and
overhanging arm B in which latter the needle bar C is fitted to reciprocate and
has an overseaming or cross stitching throw imparted to it in the ordinary way
from an oscillating cross stitch regulator 1 centred on the arm B. The feed
mechanism and connections are also of known construction and are placed under
the bed plate as usual.
On the arm or other fixed part of the machine frame is centred a three-armed
lever E, E, E2, one arm E of which has connected to it a rod or wire F attached
at its lower end to a treadle adapted to be acted on by the foot of the operator. The
second arm E has jointed to it the end of a short adjustable connecting rod G
whose other end has pivoted to it a block II adapted to slide in the groove d of the
stitch regulator 1) and to which block His attached the connecting rod which
acts on the needle bar C to impart to it the overseaming throw. The third
arm E2 of the lever passes through the slot I in the bed plate wherein is fitted the
usual sliding block of the feed regulator J, and its extremity bears on a forked
piece adjustably secured to the end of the usual feed regulating lever K which
carries the pivot L for the lever M operating the feed dog Ñ.
In the operation of the machine as used in overseaming and barring button
holes the three armed lever E, E, E, is brought into action upon completion of
the overseaming and during the barring operation by the foot of the operator who
depresses the treadle and thereby tilts the lever E so that its arm E2 acting on the
feed regulating lever K throws the feed motion more or less out of action.
Simultaneously with the alteration of the feed the arm E', which during the
overseaming is held against a stop e by the action of a spring el, acts on the slide
block H to traverse it in the groove of the pivoted cross stitch regulator D so as
to carry it further from the point of oscillation thereof and thus increase the over-
seaming throw of the needle bar in order to produce a somewhat crowded and
lengthened stitch suitable for barring the end of the button hole.

page_text: In button hole sewing machines it is desirable that the feed of the fabric should
be stopped or shortened during the barring operation and at the same time the
overseaming throw of the needle bar should be lengthened; but in fancy stitch
sewing machines it may be necessary to vary the feed from time to time without
altering the width of the cross stitch or to alter the latter without interfering with
the feed. In such cases one or other of the arms E or 2 of the lever E may be
dispensed with or made to disconnect or otherwise rendered inoperative. By
suitable adjustment of the forked piece on the feed regulating lever K the
lever E may be used merely to lessen more or less the extent of the feed instead of
throwing it out of action when the treadle is actuated by the foot of the operator.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is :-
1. In a button hole sewing machine the arrangement in combination with the
feed and the cross stitch regulating devices of a three armed oscillating lever
connected to a treadle under the machine and having also connections to the
needle bar and feed motion for simultaneously lessening or throwing out the feed
and increasing the overseaming throw of the needle bar substantially as
described.
2. In a fancy stitch sewing machine the combination with the feed regulating
mechanism of an oscillating lever connected thereto and to a treadle adapted to
be operated by the foot for varying the extent of feed during the sewing operation
substantially as described.
3. In a fancy stitch sewing machine the combination with the cross stitch
regulating mechanism of an oscillating lever connected thereto and to a treadle
adapted to be operated by the foot for varying the width of the cross stitching
during the sewing operation substantially as described.
Tatad h. Q4 L
100-
WALLACE FAIRWEATHER,
of the firm of Cruikshank & Fairweather,
Chartered Patent Agents, 62 Saint Vincent Street, Glasgow,
Agent for the Applicants.