improvements in Sewing Machines.
Year: 1895

page_text: Date of Application, 26th July, 1895
Complete Specification Left, 25th Apr., 1896-Accepted, 13th June, 1896
improvements in Sewing Machines.
JOHN MORTON, WILLIAM URIE MORTON and JAMES RAEBURN URIE MORTON
Sewing Machine Manufacturers, 11 Bothwell Circus, Glasgow in the County of
Lanark, Scotland do hereby declare the nature of this invention to be as
follows:-
First, the check lever common to sewing machines is discarded and in its place
a system of compound threading is adopted whereby the needle thread passes over
and under a number of discs or pulleys with the object of procuring sufficient slack
thread for the enlarged shuttle to pass through the loop.
Second An automatic tension is employed to hold the needle thread & is
operated by a cam on the needle shaft
Third: The needle plate is made adjustable & opens according to the travel of
the feed.
Fourth The shuttle oscillates horizontally and is preferably made without a
bottom a steel case containing a spool or cop is dropped into the centre of the
shuttle and rests on a stationary platform round which the shuttle oscillates, but
the shuttle may be made with a bottom, in which case, the steel case is not required
but instead, a spring is used to encircle the cop or spool to keep it from shaking out
of position under high speed.
In either form of shuttle, tension is obtained by means of a flat spring on the
shuttle lid, and said lid has several holes near to its circumference, any one of which
be the delivery eye, as determined by the length of stitch employed.
may
In explanation of the first paragraph
I. The thread passes from the usual bobbin through an ordinary tension on
machine arm, then through an eyelet on machine head, and over a pulley on the top
of needle bar: thread then passes under a pulley on machine face plate, then passes
over a second pulley which needle bar carries on its head: it is then carried down
and under a pulley on the face of machine, and over another pulley which is
fixed to the needle bar about its middle it is by this means the check lever
is replaced.
In explanation of the second paragraph
:
II. The "automatic" tension is not quite rightly named: tension "retainer" or
"retarder" more clearly expresses the clamps which hold the thread at certain points
of its travel these retainers are two in number, but are both worked off the needle
cam disc: the one acts on the thread after it passes the tension on arm of machine,
and the other after it leaves the pulley in middle of needle bar, and just before it is
passed through the eye of the needle.
JUHN MURTON,
WM. URIE MORTON.
JAMES R. U. MORTON.

page_text: We JOHN MORTON, WILLIAM URIE MORTON and JAMES RAEBURN URIE
MORTON, Sewing Machine Manufacturers, 11 Bothwell Circus, Glasgow, in the
County of the City of Glasgow, Scotland 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 :-
By a system of compound threading instead of the usual check lever a greater
amount of slack thread can be quickly taken up and thus permit of a shuttle much
larger than usual being employed.
It is necessary to detain the needle thread at one or two points on its way to the
needle to determine the exact amount of slack thread necessary to permit of shuttle
passing through the loop for this purpose a thread retarding device is used as after
described.
The shuttle oscillates horizontally & is preferably made without a bottom-&
steel case containing a spool or cop is dropped into the centre of the shuttle and
rests on a stationary platform round which the shuttle oscillates but the shuttle may
be made with a bottom in which event the steel case is not required but instead, a
spring is used to encircle the cop or spool & so keep it from shaking out of position
under high speed.
In either form of shuttle, tension is obtained by means of a flat spring on the
shuttle lid & said lid has several holes near to its circumference any one of which
may be the delivery eye as determined by the length of stitch employed.
Figure I is a front elevation of a sewing machine embodying the invention.
Figure 1 is an end view of same.
Figure III is a plan of same.
Figure IV is a plan of shuttle spool case.
Figure V is a side elevation of Fig. IV.
Figure VI is a plan of shuttle.
Figure VII is an edge view of shuttle.
Figure VIII is a plan of needle plate.
Figure IX is an edge view of Fig. VIII.
In foregoing figures 1 represents a sewing machine tension of usual design, 2 is
a thread retarder which is hinged 3 to machine arm & is put in action by a cam 4
after traversing the retarder the thread passes through a hole or hook 5 on its way
to the first pin, disc or pulley 6 on needle bar head.
7 is a pulley or disc fixed to machine arm under which the thread passes after
leaving pulley 6. 8 is a second pulley on needle bar head over which the thread
passes and after which it is carried down and under pulley 9 which is fixed to
machine arm, the thread then passes over pulley 10 which is attached to the needle
bar at or near its centre, the thread is then passed under the second retarder 11
which is hinged at 12 and whose upper end 13 is actuated by the cam 4.
The object of retarder 2. is to allow only sufficient thread to permit of the shuttle
passing through the loop the retarder is therefore closed except when the needle bar
is rising & thus drawing off thread for the loop.
The second retarder 11. clamps the thread from the time the needle begins its
descent until it enters the material thus keeping the needle from cutting its thread.
18 is an edge view of the spool or cop case & 19 represents the flat circular spring
fixed to the inside of case when the shuttle is made with the usual bottom & the
cop, clasped by spring 19 is kept from shaking out of position.
20 is the stationary platform, on which the shuttle spool case rests and 21 is the
pin supporting it.

page_text: 14 shows the shuttle, 15 the lid, 16 the tension spring on same & 17 is the part of
shuttle which bears on the race.
22 is the part of needle plate which sliding in groove 23 adjusts to admit of feed
travelling the length of stitch required by the feed 24.
Having thus detailed the precise manner in which our invention is to be made we
declare that what we claim is :-
I. The system of compound threading substantially as described herein.
11. A bottomless oscillating shuttle having a spool case in its centre in combina-
tion with a stationary platform substantially as herein described.
III. An adjustable needle plate substantially as herein described.
24th April 1896.
JOHN MORTON.
WM. URIE MORTON.
JAMES RAEBURN URIE MORTON.