Year: 1886

page_text: Date of Application, 7th Aug., 1886.
Complete Left, 9th May, 1887.
Complete Accepted, 10th June, 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 improvements in Lockstitch Sewing Machines, and consists
of a novel construction and method of operation of the shuttle, and in the general
construction and arrangement of the parts used in connection therewith, to effect the
complete action of sewing.
.
We construct the shuttle preferably in the form of a ball, so that it rolls freely by
gravity. The shuttle is so constructed that an ordinary trade reel or bobbin of thread
can be placed within it, the thread running through a suitable aperture, and convenient
means for regulating any desired tension of the shuttle thread being fitted in or on
the said shuttle.
The shuttle is reciprocated between a fixed Cup or pocket and a revolving Cup, one
on either side of the vertical needle, the reciprocation being produced by a spring or
gravity or both, in one direction, and by a return push in the other, or by direct
pushes in both directions.
.
The rotary shuttle cup receives its movements either directly or indirectly from a
hand wheel, and carries a hook or looper by which the slackened thread from the
needle is looped open around the mouth of the said Cup, so that the shuttle and
shuttle thread passes through the needle loop in one of its reciprocations and thus
effects a lock stitch.
The direct push upon the shuttle in one or in both directions if required may be
produced by a sliding plunger or plungers through the axis of the said shuttle Cups,
or by a bent crank finger or fingers pivoted in the frame of such Cup or Cups, and
provided with tails, or by one or more plungers or levers not concentric with the Cup,
and if need be pivotted outside said Cup.
In the first instance, the push or pushes may be operated by cam faces or equivalents,
or by springs reacting against cam f...cs, or detents, to regulate the time of action of
such springs.

page_text: In the second instance, the tail or tails of the said finger lever or levers may work
in contact with Cam faces moving relatively to the said levers, by which they may be
operated at the desired moment.
The shuttlo may be checked and maintained in place during its stationery intervals
by a guard or its equivalent, which may be conveniently pivoted at any suitable point,
and moved out of the way when the shuttle is required to travel. This action may be
effected by the same Cam faces as operate the pushes or Crank fingers ejecting the
shuttle, or by distinct Cain faces as may be desirable.
The needle bar may be operated from the said Rotary motion of the shuttle cup by
an eccentric, cam, or connecting Rod.
The take up lever for tightening the loop, the feed motion, and tension of the
threads may be effected in convenient known methods.
T L
1000
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicants.

page_text: 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 improvements in lock stitch sewing machines, and consists
in a novel construction and method of operation of the shuttle, and in the general
construction and arrangement of the parts used in connection therewith, to effect the
complete action of sewing.
We construct the shuttle preferably in the form of a ball, so that it may roll freely
by gravity or be caused to reciprocate or swing after the manner of a pendulum, and
the shuttle is so constructed that an ordinary trade reel or bobbin of thread can be
placed within it, the thread issuing from a suitable aperture and convenient means for
regulating any desired tension of the shuttle thread being effected in or on the said
shuttle.
In order that our invention may be the better understood we now proceed to
describe the same reference being had to the drawings hereunto annexed, and to the
letters and figures marked thereon.
Figure 1 is a side sectional elevation of our improved machine, and
Figure 2 is a front elevation of the same.
Figure 3 is a detail of looper cup, showing looper, groove, and cam face.
A is the shuttle in the form of a ball, containing within it an ordinary trade reel B,
mounted on a suitable spindle or centre C, convenient means for regulating any
desired tension of the shuttle thread being fitted in or on the said shuttle, such as by
passing the thread through a suitable number of holes.
The shuttle A is reciprocated between the fixed cup or pocket D, and the revolving
cup E, one on either side of the vertical needle F, the reciprocation being produced in
one direction by the direct push of the cam finger G, pivotted on the revolving cup E,
and which is operated by a fixed cam face H underneath the working table, as the
cup E and finger G revolve. The return reciprocation is conveniently produced by
the spring finger J, which will push the shuttle A back into the revolving cup, as
shown by dotted lines in the drawing, raising the cam finger H. This return
reciprocation may if desired be effected also by the direct push of a suitable finger or
piston. The shuttle may be checked and maintained in place during its stationary
intervals by a spring guard K, attached to a rigid bracket L, and which is moved out
of the way, when the ball shuttle is required to travel, by a cam face e upon the outer
periphery of the revolving cup E.
The said revolving cup E receives its movement either directly or indirectly from a
hand wheel M. A hook or looper h, seen in plan detail, figure 3, by which the
slackened upper thread from the needle is looped open around the mouth of the said
cup, a flange or groove b being provided, so that the thread is necessarily kept upon
the periphery of the said revolving cup, during the reciprocation of the shuttle A, so
that the latter may pass through the upper thread. The said flange or groove b is also
so formed that the thread is thrown off the periphery of the said revolving cup when
the reciprocation has been completed; a lock stitch is thus effected.

page_text: The needle bar P may be operated from the same rotary motion of the hand
wheel M, which operates the revolving cup E, by an eccentric, a cam as shown, or by
a connecting rod, or if desired in combination with toothed gear for multiplying the
speed of stitching as compared with the rotations of the hand wheel M.
We may construct the cam operating the needle bar in the form of a spiral with
part circular, and a sudden drop towards the centre, and applied so as to effect the
downward stroke of the needle bar by the spiral portion of the cam against the
reaction of a suitable spring, which will ensure the return up-stroke of the needle bar.
The circular portion of the cam permits a period of rest, whilst the needle bar remains
stationary at the bottom of the stroke, and the shuttle passes through the loop and the
aforesaid reacting spring will cause the needle bar to return to the top of the stroke
by a sudden action, as the sudden drop in the cam permits it to take place.
Any suitable feed may be employed with this machine, but a convenient arrange-
ment is for a rocking bar Q, pivotted on the frame, to receive oscillatory motions
from an eccentric cam on a revolving shaft. These movements communicated to
another oscillating bar R, pivotted under the table and provided with a serrated face,
where it comes under the work at the needle, by means of a suitable slot in the table,
will, in combination with a suitable spring presser foot S, effect the necessary feed.
The take-up movement for tightening the loop may be effected by the movement of
the needle bar, its thread being passed through suitable guides T T on the frame and
the needle har respectively. Any suitable number of these guides may be used, so
that by threading the cotton in a zigzag manner through the fixed and movable loops
respectively, any required take-up may be effected, or it may be effected in any other
known manner, as likewise any known tension of the top bobbin or thread inay be
applied to this machine.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, we declare that what we claim is :-
1st. The combination in a lock-stitch sewing machine of a ball shuttle containing a
trade reel of cotton reciprocated by suitable mechanism with a rotative looper,
reciprocating needle bar and feed motion, substantially as described.
2nd. In a lock-stitch sewing machine the construction of a shuttle in the form of a
ball, containing a trade reel of cotton, and reciprocated by suitable cam fingers, or
springs, through the loop of the upper cotton, substantially as described.
3rd. The combination with such a reciprocating ball shuttle of a rotary and fixed
cup, the former carrying a looper by which the upper cotton is looped out for the
passage of the shuttle, and the rotative movement of which is utilized to operate the
reciprocation of the shuttle and of the needle bar and feed, substantially as described.
4th. In a lock-stitch sewing machine the operation of the reciprocating shuttle by
a mechanical push against a spring recoil, the shuttle being held in position by a
check guard or trigger until the reciprocating movement of the shuttle is required to
be completed, the movement being effected instantaneously by the spring recoil,
substantially as described.
5th. In a lock stitch sewing machine, the combination of a shuttle reciprocated by
a nechanical push and spring recoil as claimed in claim 4, with a needle bar whose
reciprocating notion is controlled by a cam of such shape that the needle and needle
bar may be caused to remain at rest or rise and move quickly or slowly as desired,
with or without a spring reaction substantially as described.
Dated this 7th lave of a 1007
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicants.