Year: 1886

page_text: Date of Application, 9th Sept., 1886.
Complete Left, 12th Apr., 1887.
Complete Accepted, 13th May, 1887
I, ARTHUR FRANCIS WILEMAN of No. 59 Windsor Road, Ealing in the County of
Middlesex, Civil Engineer do hereby declare the nature of this invention to be as
follows:-
My invention relates to a compact and simple construction of lock stitch sewing
machine which is arranged as follows: The frame, preferably made in one piece,
consists of a base that can be clamped on a table, an upright back, and a goose neck
projecting forwards to carry the needle guide and presser slide; there is also pro-
jecting up from the base a support for the table which is fixed some distance abovo
the base. On the back of the machine about its middle is mounted a toothed wheel
with winch handle. This, which is the driving wheel, gears with two pinions, the
one pinion above on a shaft passing through the goose neck to drive the needle guide
by means of a crank pin working in a cam slot of the guide, the other pinion below
having on it a crank pin which working in the slotted arm of a rocking shaft under-
neath it causes that shaft to reciprocate. An arm projecting up from this rocking
shaft terminates in a cradle in which is placed the shuttle, which reciprocates to and
fro immediately under the table and close by the throat into which the needle descends.
In order to get access conveniently to the shuttle, I fit the arm which carries the
shuttle to slide upon the shaft clear of a key or pin; on pulling back this arm in
opposition to a spring I disengage it from the key or pin and can turn it down so as
to get access to the shuttle. The rocking shaft works the feed in the following manner.
On the shaft is an upright arm which has in it a vertical slot with a lateral notch at
the top of the slot. In this slot is engaged a pin at the lower end of a vertical lever,
the upper end of which is engaged in the under side of a serrated feed slide. The

page_text: vertical lever has a slotted hole for its fulcrum pin, so that it can be raised or lowered
a little. As the arm on the shaft rocks in the one direction the lever and feed slide
aided by a spring can descend a little while the feed slide is making its back stroke,
but, when the arm rocks in the opposite direction, the pin of the lever being then
engaged in the lateral notch of the arm, the lever and feed slide are pressed upwards
so as to give the forward feed to the fabric. The fulcrum of the vertical feed lever
is itself on a lever that can be adjusted higher or lower so that the feed slide can by
altering the leverage be caused to make a shorter or longer stroke according to the
length of stitch required.

page_text: I, ARTHUR FRANCIS WILEMAN of No. 59 Windsor Road, Ealing in the County of
Middlesex Civil Engineer 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 a compact and simple construction of lock stitch sewing
machine as I will describe referring to the accompanying drawings. Fig. 1 is a
vertical section. Fig. 2 is a back elevation. Fig. 3 is a front elevation. Fig. 4 is a
part transverse on X X of Fig. 1, and Fig. 5 is a sectional plan on Y Y of Fig. 1.
A is the frame of the machine, which is cast in one piece, bored at the top to receive
in bearings the rotating spindle B and at the bottom to receive the rocking spindle C.
At the back of the frame is mounted on a fixed stud pin a toothed wheel D, turned
by a handle e, which for convenience of packing and transport may be jointed at e¹ so
as to be folded against the wheel when the machine is not in use, a ring e² being slid
over the ring e¹ to keep it rigid when in use. The wheel D gears with two equal
pinions, the one b fixed on the spindle B, and the other F mounted on a fixed stud
pin f. The frame A is made with a lip a projecting at the back so as to shield the
gearing. In the upper part of the machine, at the front of the goose neck, the
spindle B has fixed on it a disc G with a projecting crank pin and roller g and in
front of this is fitted the needle slide H which is caused to reciprocate by the roller g
revolving in the cam slot h. At the side of the guide for the needle slide is fitted
the sliding presser foot K which is pressed down by a spring k and can be raised
and held up by a cam lever k¹. There is also mounted on the guide a spring take up L
which is moved up by a stud on the needle slide. The reel for the needle thread is
placed on a pin and the thread is kept tight by an adjustable tension disc l. In
the lower part of the machine, the rocking spindle C which is caused to rock by a
crank pin on the pinion F working in the slot of an arm e fixed on C, extends to
a front bearing c¹, an upright which supports the front part of the table T, the back
being held in a notch of the frame A. On C is fixed an arm ca in which is a pin c
projecting both to the front and to the back of the arm c³. The back end of the pin c¹
enters a hole in an arm S which carries the shuttle s. The arm S is pressed by a
spring s up against the arm c³ so that the pin c engages in the hole in S, and in this
$1
condition the arm S is caused to rock with the spindle C moving the shuttle s to and
fro in a circular are under and behind a guide plate s² which is fixed under the table T,
and which is notched in the middle to allow certain freedom of to and fro and up and
down motion to the serrated feed slide n; it has also a vertical groove in its back to
admit the needle.
When it is desired to remove or replace the shuttles the arm S is pulled back a
little in opposition to the spring s¹ so as to disengage it from the pin c, and, as the
arm S is then free to turn on the spindle C, it can be turned down as indicated by the
dotted lines S Fig. 4 so as to give access to the upper part of the arm containing

page_text: the shuttle s. The feed apparatus is of the following kind. To the serrated feed slide n
is jointed a vertical lever N which has in its middle a vertical slot, and at its lower
end also a vertical slot n¹ with a side notch n² at the bottom of the slot. In the
upright (which in Fig. 3 is partly broken away to shew the parts behind) there is
also a vertical slot, and a pin n³ can by means of a finger nut be fixed higher or lower
in this slot this pin serving as a fulcrum for the vertical lever N. The front end of
the pin centers the notched slot n¹ of the lever N, consequently as the spindle C
and its arm c³ rock, the lever N is caused to oscillate on its fulcrum n³ moving the
feed slide n to and fro, with a greater or less stroke according as the fulcrum pin n³
is adjusted lower or higher in the slot of the upright c², this affording means of regu-
lating the length of stitch. In order that the feed slide n may by its stroke in the
one direction advance the fabric on the table T, but be down clear from the fabric in
its back stroke a spring n¹ attached to the lever N operates in conjunction with the
notched slot n' in the following manner. When the parts are in the position shewn in
Fig. 3 the arm ³ moving in the direction of the arrow, the pin c is engaged in the
notch n² and consequently as c¹ makes its stroke to the right in a circular arc it not
only causes the lever N to oscillate, but also moves the lever up in opposition to the
spring n, and thus the serrated feed plate n is pressed upwards while it moves to
the left and so advances the fabric. When begins to make its back stroke to
the left, it disengages itself from the notch n² and now the spring n¹ draws down
the lever N and feed plate n which thus makes its back stroke to the right hand
clear of the fabric.
For the purpose of winding thread on the shuttle bobbin, I place the bobbin V
(Fig. 1) between the end of the spindle B and a spring v in which there is a hole to
receive the end of the bobbin axis. On causing the spindle B to revolve it drives the
bobbin V by frictional contact winding the shuttle thread on it.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :-
1. In a lock stitch sewing machine the combination of the hand wheel D, the two
equal pinions 6 and F, the rotating spindle B with the needle movement, and the
rocking spindle C with the shuttle and feed movements substantially as described.
2. The combination of the pinion F with crank pin f¹, slotted arm c, rocking
spindle C and arms e³ and S for working the shuttle, substantially as described.
3. The combination of the rocking arm c³ its pin c, the lever N with its notched
slot n n jointed to the feed slide n and working on the adjustable fulcrum pin n³
constituting the feed apparatus, substantially as described.
Dated this 12th day of April 1887.
ABEL & IMRAY,
Agents for the Applicant.