An Improvement in Sewing Machines.
Year: 1896

page_text: I, SAMUEL BEAOH COOHRANE, Mechanician, of 94 Lyndhurst Road in the
Parish of Camberwell in the County of Surrey do hereby declare the nature of
this invention to be as follows:-
My improvement refers to another mode of retaining and releasing ohangeable
hooks in sewing machines making a variety of stitches as described in my invention
No. 10,792-1891, referred to particularly in the specification page 10, lines 14
to 21 and to be read in connexion with Figure 38 Sheet 4.
I now propose another mode of holding and releasing the various looping
arrangements, viz.: instead of using a forked piece held by a screw on a bar, I use
a latch which has bearing and which is held by a pin in the same lug as is used
for holding the spool-ring. This lug is channeled or cut to receive the
latch and is also bored to receive a spiral spring. The said spring acts upon the
latch on the opposite side of fulcrum-pin from the looping arrangements, so that
the hooks &c. are held in position but can be readily released by pressing the
lever-latch. The looping arrangements remain the same.
Dated this 22nd day of August 1896.
An Improvement in Sewing Machines.
I, SAMUEL BEACH COOHRANE of 94 Lyndhurst Road in the Parish of
Camberwell in the County of Surrey, Mechanician do hereby deolare 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:-
In the Patent Specification 10792 of 1891 and especially on page 10 lines 14
to 21 read in connection with Fig. 38, Sheet 4 is described a means for retaining
and releasing interchangeable hooks and other loop forming devices in sewing
machines for making a variety of stitches.
Now according to my present invention I provide another means for holding
and releasing the looping devices in such machines and in other sewing machines
with interchangeable or removable loop forming devices vis. instead of using a
forked piece or carrier as described in the aforesaid specification said carrier being
fixed on a bar by means of a set screw I use a latch which has its bearing or
fulorum in the same lug that is used for holding the spool ring. This lug is
channelled or forked to receive the latoh and may also be bored to receive a
helical spring. The said spring or any other suitable spring acts upon the latch
on the opposite side of the fulcrum pin from the looping device, so that the hook
DJ

page_text: or other looping device is held in position but can be readily released by pressing
the lever latch against the effort of the spring.
Fig. 1 of the accompanying drawings is a part sectional end view of the parts,
showing the machine fitted as an example with a rotary hook or looper. Fig. 2 is
a plan of underside.
The lug A is channelled to receive the latch B which is held therein by the
fulcrum pin C; the latch all but tonches the face of the disc of the looper D and
is kept in place by the pressure of the helical spring E which is held in a bored
out part of the lug A. To release the looper hook or other looping device the
outer end B' of the latch has merely to be pressed upon, against the effort of the
spring into the position shown in dotted lines; the looper can then be readily
removed.
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 1
claim is.
1. In sewing machines with interchangeable or removable loop forming devices
the application and use of a spring latch operating substantially as set forth.
2. The construction of spring latch described and shown.
Dated thin and f
1005
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.