Improvements in Sewing Machines.
Year: 1891

page_text: Date of Application, 15th Aug., 1891
Complete Specification Left, 20th Nov., 1891-Accepted, 30th Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in Sewing Machines.
JOHN MORTON & WILLIAM URIE MORTON Sewing Machine Manufacturers,
Bothwell Circus Glasgow in the County of Lanark Scotland do hereby declare
the nature of this invention to be as follows:-
This invention relates to machinery for sewing rings or grummits into sails,
tarpaulins awnings, tents, wagon covers, horse clothing and other coverings which
have hitherto been fastened by hand.
The machine also makes pye holes .e. edges holes without using a ring or
grummit.
The cloth is clamped to machine and the ring laid on or between the plies of
cloth or under the cloth as desired and the machine sews over and round the ring
taking alternately a stitch on inside and outside..
The novel features in this machine are:-
I. The mechanism for moving the needle and shuttle round together so that the
same relation to each other is always maintained.
On the needle shaft there is placed a cam which operates a vertical shaft by
means of a toothed wheel. At the lower end of this vertical shaft there is a spur
wheel which gears into another on a parallel vertical shaft and this latter shaft has
a bevel gear at both ends-the upper gear engages with a similar gear at one end
of a horizontal shaft which passes along machine arm and the lower gear operates
an exactly similar shaft passing under the bed of the machine and these two
horizontal shafts have bevel gears on their opposite ends, the upper one engaging
another which encircles the needle bar tube and the lower one, similarly moves a
bevel gear of same pitch which is fixed to the vertical shuttle shaft.
II. The arrangement for making the shuttle reciprocate.
An eccentric is keyed on the needle shaft and the connecting rod from it is fixed
to one end of a rocking lever under machine bed, the other end of this lever is
forked and works in a grooved collar which encircles the shuttle shaft and moves
the collar up and down alternately. Said collar is connected by a link to a bell
crank and one arm of this crank forms the shuttle lever and as the collar rises and
falls the shuttle lever (carrying the shuttle with it.) moves backward & forward.
III. The needle bar tube containing mechanisin to move the needle so that it
will move alternately from outside to inside the ring or hole to be sewn the needle
being attached to the lower end of a needle bar inside of the needle bar tube.
The needle bar tube is moved up and down by an heart shaped cam of ordinary
pattern and the needle bar is hinged at its upper end within said tube: the lower
end of the needle bar has a cross or T head which carries the needle and which has
a slot cut at a proper angle to admit of the necessary backward and forward motion
so that the needle will alternately take one stitch inside and another outside the
grummet and so fasten it to the cloth.
A parallel bar passes down through the needle bar tube and is moved up and
down as after described the lower end of this bar moves up and down in the
angular slot of the needle bar thus throwing it backward and forward.
The parallel bar gets motion from a horizontal bar which is in turn actuated by
a double grooved cam fixed to the needle shaft.
IV. The hollow bar also allows of the twine or thread passing down through it
to the needle and thus prevent twisting.
V. The check lever movement.
The check lever is hinged to the needle bar tube and revolves with it in such a
manner that the thread nasses straight down through the needle bar tube to the

page_text: needle. There is a collar round the needle bar tube and a connecting rod is fixed
to this collar and to the check lever thus giving the necessary rise and fall, for the
check lever rises and falls with the needle bar tube, while the collar to which the
check lever is connected, while it revolves with the needle bar tube does not move
up or down with it.
VI. The clamp device which holds the cloth in position whilst the machine is
stitching in the ring or round the hole.
When the cloth is placed on machine bed under the needle an.iron ring is moved
down upon it by means of a lever and this ring has on its under side teeth or spikes
to prevent the cloth turning while being sewn. Inside this ring, a flat circular
plate holds down the grummet. This circular plate passes over a projecting part of
the needle plate and is thus made to revolve with it."
VII. The rotating needle plate.
The needle plate is a circular piece of iron secured to the upper end of the
shuttle shaft and revolves with said shaft. Said needle plate has a slot through
which the needle passes and it has a raised part over which the flat circular plate of
the clamp device passes.
JOHN MORION.
WM. URIE MORTON.
t
COMPLETE SPECIFICATION.
Improvements in Sewing Machines.
We, JOHN MORTON and WILLIAM URIE MORTON, Sewing Machine Manu-
facturers, Bothwell Circus, Glasgow in the County of Lanark, Scotland, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
The invention relates to machinery for sewing rings or grummits into sails,
tarpaulins, awnings, tents, wagon covers, horse clothing and other coverings. The
machine also makes pye holes i.e., edges holes without using ring or grummit.
Three sheets of explanatory drawings accompany this Specification.
Figure is a front elevation of a machine embodying the invention.
Figure II is a left-hand end view of same.
Figures III and IV are sectional views of the needle bar tube with its internal
gear and
Figure Vis another (unbroken) view of the same.
Figures VI and VII are respectively, front elevation and end views of needle
bar tube with outside mechanisin.
Figure VIII is a plan of needle bar tube through A. B-see Figure III showing
needle bar and parallel bar.
Figures IX and X are plans of the clamp device.
Figure XI is a plan of the needle plate.
Figure XII is a sectional view of clamp device and needle plate.
The mechanism for causing needle and shuttle to revolve together (Figs. I
and II). is constructed as follows:
1 represents machine bed-2 is the arm-3, the hand wheel-4, the needle
shaft 5, the cam on needle shaft which operates the toothed wheel 6 on the vertical
shaft 7 and 8 is the spur wheel at lower end of said shaft.
Cam 5 may be described as a worm having a single ridge on its circumference
said ridge, diverges from the centre at one point of its circumference and as needle
shaft 4 brings this part round it turns toothed wheel 6 the distance of one tooth.
Spur wheel 8 causes the parallel vertical shaft 9 to revolve by engaging with spur
wheel 10. 1, and 12 are bevel gears at upper and lower ends of shaft 9. Horizontal
shaft 13. passes through machine arm and obtains.motion from bevel gear 11 through
the medium of an exactly similar gear 14- on opposite end of horizontal shaft 13

page_text: gear 17.
is another bevel gear 15 which turns the needle bar tube 16 by engaging with bevel
Horizontal shaft 18 which passes under machine hed, has at its right-hand end,
bevel gear 19 which obtains motion from gear 12-on left-hand end of shaft 18
there is a bevel gear 20 which engages with another gear 21 fixed to shuttle
shaft 22.
The arrangement for making the shuttle reciprocate is shown by Figures I
and and is detailed thus :-
--
On needle shaft 4 there is an eccentric 23 whose connecting rod 24 is coupled to
one end of rocking lever 25-the other end of rocking lever is forked and fitted
with rollers which fit into grooved collar 26 which encircles shuttle shaft 22-this
collar is loose on said shaft allowing the shaft to revolve within it. Grooved
collar 26 rises and falls in obedience to rocking lever 25 and carries with it link 27
which connects said collar to bell crank 28-the long arm of said bell crank is
marked 29 and forms the shuttle lever, the shuttle carrier 30 being fixed thereto.
Shuttle shaft 22 has at its upper end a flat 60 and to this the stud 61 which
supports bell crank 28 and 29 is fixed and the bell crank oscillates on said stud.
To flat part of shuttle shaft 60 there is also fixed circular plate 62 and as shuttle
shaft 22 revolves it is kept from swaying by rollers 63 of which there are four
bearing at equal distances on circular plate 62.
Rollers 63 are sustained by bracket 64 which is bolted to machine bed 1.
It will thus be clear that the shuttle lever 29 reciprocates as eccentric 23 moves
round with needle shaft 4.
The needle bar tube with its connections (Figs. I, II, III, IV, V, VI, VII
and VIII) is detailed as follows:-
Needle bar tube 16 is raised and lowered by heart-shaped cam 31 fixed to
block 32 which clasps needle bar tube and carries it up and down.
Block 32 is an iron casting having a hole bored perpendicularly through it to
allow needle bar tube 16 to revolve within it and block 32 is kept from slipping on
needle bar tube by the collars 65 and 66 which are fixed to needle bar tube and
revolve with it.
Heart-shaped cam 31 is attached to block 32. Double grooved cam 37 acts as a
disc as well as a cam, having on its face a stud carrying a roller and said roller
works in heart-shaped cam 31 thus carrying cam 31, block 32 and needle bar
tube 16 with its internal gear up and down as needle shaft 4 rotates.
The needle bar 33 swings from the top of needle bar tube 16 and has at its lower
end a cross head with an angular slot 34. 35 is a parallel bar which passes_down
through needle bar tube 16 close to needle bar 33 and the lower end of said
parallel bar is furnished with a stud which works in angular slot 34 and as said bar
rises and falls, the needle 36 is alternately thrown out and in so as to take one stitch
inside and the next outside the grummit or pye hole.
Parallel bar 35 is caused to move up and down by means of double grooved
cam 37 fixed on needle shaft 4.
Double grooved cam 37 may be described as a cylinder with two circumferential
grooves cut in it and having a fixed switch at one point of its circumference so that
the gib which is attached to horizontal bar 38 being pointed and following in the
aforesaid grooves is moved alternately from one groove to the other as needle
shaft 4 revolves.
Horizontal bar 38 is supported by bracket 59 and as the gib before mentioned
follows to either groove of double grooved cam 37 bar 38 imparts side motion to
vertical bar 39 and said vertical bar forms a slide for cap 40 which is attached to a
short shaft 41. Shaft 41 is carried on snugs said snugs being part of block 32.
To shaft 41 is fastened a block which works in an angular slot of another
block 42.
To block 42, a short vertical shaft 43 is attached its upper end being secured to
collar 44 and the upper end of parallel bar 35 is secured to said collar 44 through
a slot in needle bar tube 16.

page_text: The needle bar tube (Figs. III, IV and V) allows free passage for thread at 45.
The check lever movement (Figs. I, II, VI and VII) is thus detailed
:-
Check lever 46 is fastened to needle bar tube 16 and is connected by link 47 to
grooved collar 48 which encircles the needle bar tube and revolves with it but is
kept from moving up and down with it by the arms 49.
The clamp device (Figs. I, II, IX, X, XI and XII) is constructed thus:-
50 is a double armed lever hinged to machine arm at 51 and is raised and
lowered by handle 52.
Lever 50 is secured to an iron ring 53 which is provided with teeth or spikes on
its under side in order to keep the cloth from turning this ring has a flange on
which rests flat circular plate 54 kept from rising by catches 55 and turned
with shuttle shaft 22 by means of a projecting part of needle plate 56 passing
through it.
The rotating needle plate (Figs. XI and XII) is constructed as follows:-
56 is the needle plate made circular and screwed to the top of shuttle race 57
said race being fixed to shuttle shaft 22.
By preference, needle plate 56 is formed with a recess in which the ring or
grummit lies-but it may be used without and in making pye holes no recess is
necessary.
Having thus detailed the precise manner in which our invention is to be made we
declare that what we claim is :--
I. The combination of cam, shafts and gears for working the needle and shuttle
round together substantially as described herein.
II. The combination of eccentrics rocking lever, grooved collar and shuttle lever
substantially as set forth herein.
III. The combination of the needle bar tube, needle bar and parallel bar
substantially as herein described.
IV. Constructing needle bar tube to contain mechanism to work the needle and
also allow free passage for the thread.
V. The combination of check lever, link, collar and needle bar tube substantially
as described herein.
VI. The combination of the clamp with its flat circular plate constructed
substantially as herein described.
VII. The rotating needle plate constructed substantially as herein described.
Dated this 19th day of November 1891.
JOHN MORTON.
WM. URIE MORTON.