Improvements in Sewing Machines.
Year: 1895

page_text: Improvements in Sewing Machines.
I, DENIS FLANAGAN, of Wellfield Works, Clayton-le-Moors, in the County of
Lancaster, Machine Maker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in the manufacture of sewing machines
such as are described in Specification of Letters Patent granted to the present
applicant dated the 11th February 1892. and numbered 2647. The present
invention consists of improvements in the construction of the loop carrier or
former, to improvements in the construction of the reel frame for carrying the reel
or spool and its case, and to improvements in apparatus for controlling the feed
motion and regulating the length of stitch.
The improvements are applicable to either rotary or oscillating machines, and
the loop carrier is efficient and rapid in its action of carrying the loop of thread
round the reel case, and less thread is required to be taken up by the take up
motion.
According to this invention, the loop former is mounted on a rotating or
osoillating shaft driven in the usual way, and such loop former consist of a carrier
pointed at the end which takes the thread from the needle. Slightly behind the
point is a projection or barb which catches the thread, and a groove formed along
the outer part of the carrier, carries and guides one portion of the loop to one side
of the V shaped portion of the spool case, the other portion of the loop passing
down the other side of such spool case.
When the looper has carried the thread round the spool case, the loop slips off
the looper, and the take up motion then takes up part of the slack thread, and the
looper, at its next revolution or stroke, takes up the remaining slack, and completes
the previous stitch.
The thread when it slips off the looper and over the spool case, has by the looper
been left in a slot or guide formed in the cover or cap of the reel frame, and the
said guide or slot prevents the thread entangling with any of the mechanism, and
carries it away from and clear of the path of the looper.
For operating the feed motion and regulating the length of stitch, I fix on the
main shaft a small cam operating a forked lever free to rock on an adjustable
centre, the other end of the forked lever being connected to a shaft on which is
carried the ordinary feed bar operated in the ordinary manner. By removing the
position of the adjustable centre by a screw, the length of the stitch cau be
increased or dimished.
DL: och den of A 1905

page_text: I, DENIS FLANAGAN, of Wellfield Works, Clayton-le-Moors, in the County of
Lancaster, Machine Maker, 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 improvements in the manufacture of sewing machines
such as are described in Specification of Letters Patent granted to the present
applicant, dated the 11th February 1892, and numbered 2647. The present
invention consists of improvements in the construction of the loop carrier or
former; to improvements in the construction of the reel frame for carrying the
reel or spool and its case; and to improvements in apparatus for controlling the
feed motion, and regulating the length of stitch.
The improvements are applicable to either rotary or oscillating machines, and
the loop carrier is efficient and rapid in its action of carrying the loop of thread
round the reel case, and less thread is required to be taken up by the take up
motion.
'
Such being the nature and object of my said invention, the following is a
complete description of same, reference being had to the annexed drawings, in
which :-
Fig. 1 is a side elevation of as much of a sewing machine as is required to
illustrate my invention.
Fig. 2 is an end view of Fig. 1.
Fig. 3. is a plan view of the underside of a sewing machine with the improvements.
applied thereto.
Fig. 4 is a side elevation of the reel case and tension device.
Fig. 5 is an end view, and Fig. 6 a plan view of Fig. 4.
According to this invention, the loop former 1 is mounted on a rotating or
oscillating shaft 2, driven in the usual way by crank 3 and connections from the
main shaft 4 of the machine. The said loop former I consists of a carrier pointed
at the end 5, which takes the thread from the needle 6. Slightly behind the point
is a projection or barb 7, which catches the thread; and a groove 8 formed along
the outer part of the carrier, carries and guides one portion of the loop of thread
to one side of the V shaped portion of the spool case 9, the other portion of the
loop passing down the other side of such spool case 9 (see Fig. 1).
When the looper 1 has carried the thread round the spool case 9, the loop of
thread slips off the looper 1, and the ordinary take up motion (not shewn on the
drawings) then takes up part of the slack thread forming the loop, and the looper 1
at its next revolution or stroke, takes up the remaining slack,, and by so doing,
tightens and completes the previous stitch.
The thread, when it slips off the looper 1 and over the spool case 9, has by the
looper 1 been left in a slot or guide 10 formed in the cover or cap 11 of the reel
frame 12 for carrying the spool case 13, and the said guide or slot 10 prevents the
thread entangling with any of the mechanism, and carries it away from and clear
of the path of the looper 1, needle hole 14, and needle 6.
For operating the feed motion and regulating the length of stitch, I fix on the
main shaft 4, a small crank or eccentric 15 operating a lorked or slotted lever 16,
free to rock on an adjustable centre 17. The lower end of the lever 16, is by a
link 18, connected to a shaft 19, on which is carried the ordinary feed bar 20
operating in the ordinary manner. By moving the position of the adjustable
centre 17 by moving the lever 21 on its centre 22, and fixing it in the desired
position by screw 23, the length of the stitch can be increased or diminished. The

page_text: lever 21 is mounted in the frame or shell of the machine, and the screw 23 projects.
therefrom, the end of the screw 23 being in contact with the shell.
The shaft 19 is by short links 25, 25, mounted on the shaft 26, free to rock or
oscillate on the studs 27, 27, carried in the lugs 28, 28 cast to the underside of the
bed plate of the machine. The eccentric 15, lever 16, and connections, impart
through the shaft 19, both a to and fro, and up and down motion to the feed.
bar 20, so that the requisite "feed motion" is obtained by the use of one eccentric
only.
As the spool case 9 is liable to vibrate or shake up and down, an automatic
tension device for the thread is applied thereto (see Figs. 4, 5, and 6). The
thread passes from the spool inside the case 9, between the discs 29, 29, to the
material being sewn.
The disce 29, 29 are carried on a lever 30, hinged at 31 to
the top of the spool case 9, and the other end of the lever 30 is received in a
slot 32, in a lug on the top of the case 9. A spring 33 acting on the tail 34 of the
lever 30, tends to keep the opposite end at the bottom of the slot 32, and the drag
on the thread tends to lift the lever, so that whilst the spool case 9 is vibrating
the slight amount of movement allowed the lever 32, keeps the requisite tension on
the thread.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
(1.) The general construction, arrangement, and combination of parts constituting
the improvements in sewing machines, as and for the purpose herein described, and
substantially as illustrated by the accompanying drawings.
(2.) The loop former 1, having the two points, barbs, or projections 5, 7, and a
groove 8, together with the slots or guide 10 for receiving the thread or loop when.
slipped off the loop former, all in combination, as and for the purpose herein
described, and substantially as illustrated by the annexed drawings.
(3.) The general construction, arrangement, and combination of parts constituting
the improved apparatus for operating the feed bar and regulating the length of
stitch, as and for the purpose herein described, and substantially as illustrated by
Figs. 1, 2, and 3 of the annexed drawings.
(4.) The crank or eccentric 15, forked or slotted and adjustably pivoted lever 16,
link 18, rocking shaft 19, and feed bar 20, all in combination, as and for the
purpose herein described, and substantially as illustrated by Figs. 1, 2, and 3 of
the drawings annexed.
Dated this 95th day of Fahune 190€