Year: 1887

page_text: Date of Application, 7th Oct., 1887
-Complete Left,-27th Apr., 1888
Complete Accepted, 8th June. 1888
I, FREDERICK NESFIELD COOKSON, of No. 72, Lozell's Road, Birmingham, in the
County of Warwick, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
My invention relates to the construction of an improved sewing machine, and bas
more particular reference to portable hand machines.
The distinguishing feature of the present invention is the means by which the shuttle
of the under thread is actuated with a positive motion throughout its double stroke, by
a combination of pinion, eccentric rod, and rocking shaft, or their respective
equivalents, interposed between the driving wheel and the shuttle case.
The above mentioned pinion is mounted upon a shaft adapted to rotate in a suitable
bearing formed on the standard of the machine, through which it is continued for the
purpose of receiving an eccentric upon its inner end. The outer end of the rod of
this eccentric is pivotally connected to a rocking shaft adapted to rock upon an axis at,
or near, the bottom of the machine-standard.
The shuttle case is mounted upon the upper extremity of the rocking shaft; and is,
therefore, thrown with it, and acts with it, having no motion independent of it.
If the shuttle case is mounted direct upon the rocking shaft, it will, of course,
describe an arc of which the axis of the rocking shaft is the centre. The shuttle may,
however, be adapted to travel horizontally upon guide-bars, and connected to the
rocking shaft by means of a link.
In combination with the above described method of throwing the shuttle, I provide
for the lift of the cloth-presser by a combination of a stud on the side of the pinion of
the main shaft, adapted to engage with a bent lever, the nose of which lies under a
projection upon the top of the stem of the presser-foot; and for the traverse, of the
said presser-foot to effect the feed, by a second stud on the said pinion, adapted to
engage with a lever having its fulcrum upon the machine-standard, and actuating a
second lever having its fulcrum on the lower guide of the presser-stem, the fore-end
of which said lever embraces the presser-stem.
The fulcrum of the said second lever may be made adjustable for the purpose of
| varying the length of the stitches.

page_text: The first mentioned, or shuttle, pinion and the main shaft pinion are both of the same
size.
The needle bar is driven by a suitable cam gear from the main shaft, and is provided
with suitable guides which are formed in short extensions of the front bearing of the
main shaft; said guides, bearing, and the bracket by which they are fixed to the
machine-standard, being, according to my invention, approximated as compared with
hand machines as usually made, and made in one piece.
Dated this 7th day of October 1887
PHILLIPS & LEIGH,
Agents for the Applicants.
COMPLETE SPECIFICATION.
An Improved Sewing Machine.
I FREDERICK NESFIELD COOKSON of No. 72, Lozell's Road, Birmingham, in the
County of Warwick, Manufacturer, 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 :-
My invention relates to the construction of an improved sewing machine, and has
more particular reference to that class of hand machines known as portable, such as
are described and illustrated in the Specification of Letters Patent previously granted
to me, No. 9118, 27th June, 1887.
In the specification just referred to, I describe a method of actuating the shuttle
from a reciprocating crosshead, by means of a combination therewith of two recti-
linear links and a bent link, one of the said rectilinear links being connected by
means of a slot and stud to the short arm of a bell-lever the longer arm of which
carries the shuttle-case on its outer extremity.
Now, according to my present invention, I provide for the actuation of the shuttlo
containing the under thread, with a positive motion throughout its double stroke;
that is to say, at no point of said double stroke is the shuttle at liberty to rebound,
or to fall by its own weight, or to make any movement, or to rest, unless such
movement and rest are alike imposed upon it by the inelastic mechanical devices
which connect it to the driving wheel of the machine.
In carrying my invention into effect, I provide a pinion engaged by the driving
wheel of the machine, which pinion is of the same size as that on the main shaft of
the machine.
The shaft of the additional pinion above mentioned is adapted to rotate in a suitable
bearing formed in the standard of the machine, through which it is continued into tho
3. .

page_text: shuttle race. Its inner end is fitted with a disc, crank eccentric, or any other
equivalent device, adapted to actuate a connecting rod from said device to the shuttle-
caso rocking shaft with a reciprocating motion.
The shuttle case is mounted upon the upper extremity of a rocking bar having its
axis at any convenient point near the bottom of the machine standard.
In combination with the above described method of throwing the shuttle, I provide
for the lift of the cloth-presser by a combination of a bent fever, the nose of which
lies under a projection upon the top of the stem of the presser-foot, and which is
adapted to be engaged by a stud on the side of the pinion on the main shaft;
and also in combination with the said above described method of throwing the
shuttle 1 provide for the traverse of the said presser-foot, for the purpose of effecting
the feed, by means of a second lever having its fulcrum upon the standard of the
machine, adapted to be engaged by a second stud on the before mentioned. main-
shaft pinion, and thereupon to actuate a second lever having its fulcrum on the lower
guide of the presser stem which said lever embraces.
The needle bar of a hand sewing machine constructed according to my invention,
is driven by a suitable cam-gear from the: main-shaft, and is: provided with suitable
guides which are formed in short extensions of the front bearing of the main-shaft,
said extensions and the bearing, and the bracket by which they are fixed to: the
machine standard, producing a more compact head than those heretofore used on
hand-sewing machines.
In order that my invention, and the means by which the same is carried into
practical effect, may be thoroughly understood, I will proceed to describe them in
detail, referring in so doing to the accompanying, figures, which are to be taken as
part of this specification and read therewith.
Fig. 1 is a front elevation of a portable hand machino constructed according to my
invention with the door of the shuttle race open.
A
Figs. 2 and 3 are, respectively, left and right hand side elevations of the machine
illustrated in Fig. 1..
t
A is the machine base B, the machine standard; C, the driving wheel; D, the
main shaft and E, the main shaft pinion.
"
F is a pinion of the same size as the main shaft pinion, E; and is engaged by the
driving wheel, C. Its bearing is formed in any convenient way in the machine
standard, and the shaft, /, continued through. G is a disc-crank fast upon the end of
said shaft; H, a connecting rod; and I,-a rocking bar, to the outer end of which the
shuttle-case, K, is attached. The connections, y and i, between the connecting rod and
crank and rocking bar, respectively, are pivotal.
The disc-crank, G, may be replaced by any other equivalent mechanical device.
I do not confine myself to the use of the rocking bar, I, for the purpose of carrying
the shuttle-case inasmuch as the latter may be adapted to travel upon horizontal
guides, in which case the connecting rod, H, will be pivotally connected directly to
the shuttle-case, or to a suitable extension thereof.
J is a bent lever having its fulcrum in the standard of the machine at j. One
arm of this lever lies upon the top guide, K, with its nose, k, under an extension, k¹, of
the presser-stem, k².
Upon the side of the main shaft pinion there is a stud, L, adapted to engage with
the lever, J, at the right moment for the purpose of lifting the presser foot.
M is a second lever having its fulcrum upon the machine standard at m. The
lower extremity engages with a lever, N, which has an adjustable fulcrum, n, upon the
lower guide, 0, and is adapted to engage the presser stem k². A stud, m', projects
from the main shaft pinion, E, and is adapted to engage with the lever, M, at the
right moment for the purpose of effecting, through the lever N, the traverse of the
presser foot k³, the return stroke of which is effected by the resilience of the spring on
the presser-stem and the contact of the nose k with the extension k¹.
The head of my improved sewing machine consists of a plate, P, in which is formed
he bearing of the main shaft, D, two extensions, p, p, in which are formed the guides.
or the needle-bar, Q, and a bracket, p², by which the said parts are connected to the

page_text: machine standard. The cam device, R, by which the needle bar is actuated works
between the two extensions p, p.².
The head above described is, as a consequence of the compact construction of the
machine, much closer to the standard, B, than it has hitherto been possible to have
this part of a sewing machine; and as, from the simplicity of the shape of the head,
it, with the bracket, p², can be produced in one piece, I secure more than the usual
rigidity in this part of my sewing machine, as well as an economy in its production.
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 I
I claim is :-
:-
1. In a sewing machine and for the purpose of actuating the shuttle-case; the
combination of driving wheel, two equal pinions, crank on the end of the axis of the
lower pinion, connecting rod, and rocking bar; substantially as described with
reference to the accompanying drawings.
2. In a sewing machine, and for the purpose of actuating the shuttle-case; the
combination of pinion engaging with the driving wheel, crank, and connecting rod,
substantially as described.
3. The combination of driving wheel actuating the shuttle-case through a line of
gearing consisting of pinion, crank, and connecting rod; a main-shaft pinion; and
levers engaged by studs upon said pinion for the purpose of effecting the lift and
traverse of the presser-foot, substantially as described with reference to the accompany-
ing figures.
4. The construction of sewing machine head substantially as described with reference
to the accompanying figures.