Improvements in Sewing Machines.
Year: 1896

page_text: Date of Application, 30th Sept., 1896-Accepted, 19th Dec., 1896
[Communicated from abroad by THE SINGER MANUFACTURING COMPANY, of
New York, in the United States of America, Sewing Machine Manufacturers.]
Improvements in Sewing Machines.
I, WILLIAM HARVEY INSLEE, Mauager of The Singer Manufacturing Company,
Kilbowie, Dumbartonshire, do hereby declare the nature of this invention and in
what manner the same is to be performed, as communicated to me, to be particularly
described and ascertained in and by the following statement :-
My invention relates to that class of sewing machines for "barring" button-
holes or for forming "tacks" or stays at the ends of pockets or in other places in
garments or shoes where special strength is desired to prevent tearing or ripping,
and has for its object to provide a machine, of the class referred to, which will be
comparatively simple in construction and which will be efficient and reliable in
operation, performing its function with as little noise as possible.
In the accompanying drawings
Figs. 1 and 2 are opposite side views of a Singer type of sewing machine,
embodying my invention. Figs. 3 and 4 are rear and front end views, respectively,
of the same.
Figs. 5 and 6 are detail views of the feeders or feeding presser feet.
Fig. 7 is a plan view of my machine.
Figs. 8 and 9 are detail views showing the means for intermittingly rotating the
cam wheel or cylinder from the main or driving shaft.
Fig. 10 illustrates a "bar" or "tack" such as is made by my machine
constructed as hereinafter described.
A denotes the work-plate and B the bracket arm of the machine. Journalled
in the upper part of the bracket-arm is the main or driving shaft G connected by
bevel gears c and c' to a vertical shaft C' which operates the shuttle mechanism as
is common in the well-known "Singer" overseaming machine in which the
oscillating shuttle works in a plane lengthwise of the machine and in which the
needle-bar D reciprocates vertically in a swinging frame D¹ pivoted on centre
screws d so that the needle d' may be reciprocated horizontally to make over-
seaming or zig-zag stitches.
Loosely surrounding the driving shaft C, so as to rotate independently thereof,
is a cam cylinder E having cam grooves e and e', the groove e being entered by a
pin or roller stud f of a lever F pivoted at its lower end, at f', to a portion of the
arm B, and to said lever F is adjustably attached the rear end of a connecting
rod f the forward end of which is jointed to the needle-bar frame D'. The cam
groove el is entered by a pin or roller-stud g carried by an angular lever G
fulcrumed at g¹ and having at the forward end of its horizontal arm a grooved
cross-head 9 connected by an adjustable bolt or pin g³ with a slotted horizontal
arm of a rock-shaft H having a depending arm to operate one or more feeders
or feeding feet 2. Preferably two of these feeders are employed, as herein shown,
and they are provided with shanks 3 vertically movable in sockets in the lower end
of the arm hand are pivotally connected at their upper ends to a cross-head I
having a roller stud i received in a slot of a bracket J attached to the presser
bar L, the said cross-head being thus free to rock more or less so that the feeding

page_text: the horizontal movements without arresting the vertical movements thereof, a
feeding mechanism for reciprocating the work beneath the needle at right angles
to or across the line of the horizontal movements of the latter, an intermittingly
rotating cam loosely mounted on said shaft within the arm of the machine, and an
automatic mechanism for stopping the machine when a predetermined number
of stitches has been formed.
2. In a sewing machine, the combination with the main shaft thereof, of a
stitch-formning mechanism operated from said shaft and comprising a vertically and
horizontally reciprocating needle-bar and needle, an intermittingly rotating cam
loosely mounted on said shaft and within the arm of the machine, connections from
said cam to said needle bar, to move the latter horizontally, and a feeding
mechanism, also operated from said cam, for reciprocating the work beneath the
needle at right angles to or across the line of the horizontal movements of the
latter.
3. In a sewing machine, the combination with the main shaft thereof, of a
stitch-forming mechanism comprising a vertically and horizontally reciprocating
needle-bar and needle, a feeding device constructed to move the work beneath the
needle at right angles to the horizontal movements of the latter, and an inter-
mittingly rotating cam mounted on said shaft and within the arm of the machine
and having two alternately operating serpentine or acting grooves or portions one
of which is connected to the said needle-bar to move the latter horizontally and
the other of which is connected to said feeding device to cause the latter to
reciprocate the work beneath the needle at right angles to or across the line of the
horizontal movements of the latter.
4. In a sewing machine, the combination with the main shaft thereof, of a
stitch-forming mechanism operated from said shaft and comprising a vertically and
horizontally movable needle-bar and needle, the bell-crank lever G, the rock-
shaft H connected to said lever G and having the arms and h¹, the feeder or
feeders operated by said arm h', and an intermittingly rotating cam, loosely mounted
on said shaft within the arm of the machine, for operating said lever G.
5. In a sewing machine, the combination with a stitch-forming mechanism,
which includes a horizontally movable needle bar and needle, of the lever G the
horizontal arm of which is provided with the cross-head 9, the rock-shaft H
provided with the horizontal arm having an adjustable connection with said
cross-head, said rock-shaft having also the depending arm 4, one or more feeders
operated by said arm h', and a cam for operating the said lever G.
6. In a sewing machine, the combination with the main shaft C, of the needle-bar
and needle and a complemental stitch-forming device, a horizontally movable frame
in which the said needle-bar reciprocates vertically, the intermittingly rotating
cam cylinder E having cam-grooves e and e', the lever F connected to said needle-
bar frame and operated from said cam-groove e, the bell-crank lever G operated
from said cam-groove el, the rock-shaft H having the arms h and h', the latter
having an adjustable connection with said lever G, and one or more feeders,
operated by said rock-shaft, to reciprocate the work beneath the needle at right
angles to or across the line of the horizontal movements of the latter.
7. The combination with the driving shaft C provided with the cam c³, of the
lever-dog having a yoke surrounding said cam, the cam cylinder E mounted loosely
on said shaft and having teeth to be engaged by said lever-dog to positively and
intermittingly rotate said cam-cylinder, a horizontally movable feeding device and
a horizontally movable needle-bar, and connections between said feeding device
and needle-bar and said cam cylinder whereby said feeding device and needle bar
are reciprocated horizontally in planes at right angles to each other, but at
different times.
8. In a sewing machine, the combination with the driving shaft thereof, of a
stitch-forming mechanism operated from said shaft, a driving wheel or pulley fast
on said shaft, a cam rigidly connected with said shaft, a pivoted spring-pressed
stopping lever provided with a yoke one arm of which is arranged to press against

page_text: the said wheel or pulley when the other arm is engaged by said cam, and means
for holding said stopping lever inoperative and for tripping the same to throw it.
into action to stop the machine.
9. In a sewing machine, the combination with the driving shaft, of fast and
loose pulleys on said shaft, a cam rotating with said fast pulley, a pivoted spring-
pressed stopping lever provided with a yoke one arm of which will be in position
to press against said fast pulley when the other arm is engaged by said cam, a belt
shifter movable with said yoke, and means for holding said stopping lever
inoperative and for tripping the same to throw it into action to stop the machine.
10. In a sewing machine, the combination with the driving shaft C, of the fast
and loose pulleys and c, the cam con said fast pulley, the spring-pressed
stopping lever M provided with the arm m and with a pivoted yoke consisting of
the arms m' and m³, said arms being arranged, respectively to engage said fast
pulley and to be engaged by said cam, the spring-pressed tripping lever N having
a hook to engage said arm m', and a device operated from said shaft, to engage.
said tripping lever so that it will be thrown into action to stop the machine when
desired.
11. In a sewing machine, the combination with the driving shaft C, of the fast
and loose pulley c and c, the cam c on said fast pulley, the spring-pressed stopping
lever M provided with the arm m and with a pivoted yoke consisting of the
arms m and m³, said arms being arranged, respectively, to engage said fast pulley
and to be engaged by said cam, the spring-pressed tripping lever N having a hook
to engage said arm m, a rotating device, as stud es, operated from said shaft, to
engage said tripping lever and thus release said stopping lever so that it will be
thrown into action to stop the machine when desired, and a spring acted catch m.
arranged to spring over said cam to prevent reaction when the machine is suddenly
stopped.
Dated this 20th day of September 1806
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62 St Vincent Street, Glasgow, Ageut for the Applicant..
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
Vincent Street, Glasgow, Agent for the Applicant..