Year: 1886

page_text: Date of Application, 7th Aug., 1886..
Complete Left, 9th May, 1887.
Complete Accepted, 6th Aug., 1887
We, JOHN CHARLES COTTAM, of 39 Lombard Street, in the City of London'
Financier, and ALBERT DOUGLAS MOLL, of 58 Coleman Street, in the City of London:
Merchant, do hereby declare the nature of this invention to be as follows:-
Our Invention relates to Lock stitch Sewing Machines, and consists in an improved
stitch locking Mechanism in combination with the other usual parts of a Lock stitch
sewing Machine.
We place the under bobbin or reel in a Case or shuttle, and allow the said Case or
Shuttle to rest stationary upon a fixed support, which suffices to maintain the said
Case or Shuttle in its required position, but without any grip thereon, so that a thread
can pass readily around the Shuttle Case, lifting it if necessary from its support, in
order to pass such point or points; or the shuttle may be raised from its usual points
of support by suitable mechanism to allow the thread to
pass.
We further provide a looper fitted with a hook, which is partly or wholly rotated
about the said stationary bobbin case or shuttle, and which by such rotation draws
the loop of the needle thread around the under bobbin case or shuttle, thus causing
the under bobbin thread to pass through the loop of the upper thread and lock the
stitch.
The needle bar feed and other usual parts of a lock stitch sewing machine may be
operated by cams, eccentrics, or connecting rods, from the shaft, conveniently provided
with a hand wheel which produces directly or indirectly the movement of the afore-
said looping hook.
O
1
AL 1000
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
.
Improvements in Sewing Machines.
We, JOHN CHARLES COTTAM, of 39 Lombard Street, in the City of London, Financier,
and ALBERT DOUGLAS MOLL, of 58 Coleman Street, in the City of London, Merchant,
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 :-
Our invention relates to lock stitch sewing machines, and consists in an improved
stitch locking or shuttle mechanism, in combination with the other usual parts of a
lock stitch sewing machine.
In order that our invention may be the better understood we now proceed to
describe the same in relation to the drawings hereunto annexed, reference being had 1
to the letters and figures marked thereon.
Figure 1 is a side vertical section through our improved machine.
Figure 2 is a front elevation of the same.
Figure 3 is a modified arrangement of the stitch looper.
We place the under bobbin A, which may be a trade reel in a spherical case, or
shuttle B, and allow the said case or shuttle to rest stationary upon supports, which"
may be conveniently spring fingers CC, which suffice to maintain the said case or
shuttle B in its required position, but with sufficiently small pressure thereon that a
thread can pass readily between the said shuttle case and the said supporting spring
fingers CC.
We further provide a looper D fitted with a hook which is partly or 2
wholly rotated about the said stationary bobbin case or shuttle B, and which by such
rotation draws the loop of the needle thread around the said bobbin case or shuttle B,
thus causing the said shuttle which carries the under thread to pass through the loop
of the upper thread, and lock the stitch. The said looper D is, in figures 1 and 2,
directly attached to a rotating axis E, which is provided with a pinion e, and receives
its movement from an internally geared hand wheel F, or any other equivalent manner.
The said pinion e also gears into an externally geared wheel G, which is on the same
axis as the hand wheel F and which communicates the necessary reciprocating
movement to the needle har H (the said needle bar being suitably guided in the frame)
by a suitable cam or eccentric.
3
Equivalently, we may modify the method of rotation of the looper D by placing its
axis of rotation obliquely to the sewing table, and giving it a reciprocation backwards
and forwards (instead of the complete rotation) by bevel gear J J, reciprocated by a
pinion and rack K, which is connected and moves with the reciprocating movement of
the needle bar H. This angular looper is shown in plan Fig. 4. The looper D carries a
the thread over the ball shuttle to the position shown by dotted lines, i.e. beyond the
central diameter of the shuttle. On return of the looper, the thread disengages from
the hook & is drawn up on the opposite side of the shuttle to that on which it was
drawn down by the take up movement. In this case the needle bar may be reciprocated
direct by the hand of the operator.

page_text: A convenient take-up movement of the upper thread is provided by a series of
fingers L L, part of which are on the moving needle bar and part on the fixed frame.
When the upper thread is zigzagged or threaded through these bars the movement of
the needle bar to the frame may be multiplied in its take-up upon the cotton to any
desired extent. The presser feed and tension of the upper and lower threads may be
produced in any known and convenient manner to form a complete lock stitch sewing
machine.
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 :-
:-
1st. In a lock stitch sewing machine, the combination of a stationary shuttle with a
revolving looper and a reciprocating needle bar and other usual parts of a sewing
machine to effect lock stitch sewing, substantially as described.
2nd. In a lock stitch sewing machine the combination of a stationary shuttle with
an obliquely reciprocating looper, operated from or with the needle bar and other
known parts of a sewing machine, to effect lock stitch sewing, substantially as
described.
3rd. The construction in such a lock stitch sewing machine of a shuttle, spherical in
form and fitted to contain a trade reel, and supported externally by spring fingers to
permit the looped cotton to pass between the said supports and the shuttle, substantially
as described.
FELL & WILDING,
Agents for the Applicants.