Year: 1887

page_text: Date of Application, 27th June, 1887.
Specification Accepted, 29th July, 1887.
I, FREDERICK NESFIELD COOKSON, of Eva Villa, Waterloo Road, Wolverhampton,
in the County of Stafford, 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 improvements in sewing machines, and more particularly
to an improved method of guiding the shuttle of a machine constructed according to
my patent No. 11527, of A.D. 1886.
According to the method of guiding the shuttle described in the specification of the
said patent, the shuttle-case slides upon a horizontal shelf, receiving its reciprocating
linear motion from the arm of a bell-lever, with which it makes a suitably non-rigid
connection for that purpose.
Now according to this present invention, the shuttle-case slides upon a horizontal
bar parallel with the cloth-plate, and the connection between it and the bell-lever is
effected by means of an intermediate link pivotally connected to both.
I attain the object of my invention by means of the mechanism illustrated in the
accompanying drawing, which is to be taken as part of this specification and read
therewith, and in which
Fig. 1 is a left hand side elevation with the door of the shuttle-race open.
Fig. 2 is a front elevation with the door of the shuttle-race closed.
Fig. 3 is a right hand side elevation.
Fig. 4 is a plan taken below the cloth-plate with the door of the shuttle-race
closed.
A is the machine standard; and B, the cloth plate.
N is a bell-crank lever; n, its fulcrum; and u, a retaining cap. It is actuated by
a stud n² projecting through the slot n³ and engaged by the link M which receives a
reciprocating vertical motion from the cross head I through the link L.
D is a hinged door having the needle-groove d formed in it. When this door is
closed, it prevents the shuttle being thrown out of the shuttle case O¹.
Z is a single guide bar fixed in a plane parallel with that of the cloth-plate B. The
guide bar is shewn as supported by the brackets c, c¹. It may be fixed to the
machine standard in any convenient way, provided that it will not vibrate when
the machine is being worked.

page_text: The shuttle case 0₁ is provided with a pair of extensions or projections z which
embrace the bar. This pair of projections may be replaced by a single one of
equivalent length. This bar is shewn as of a circular section but I do not confine
myself to any particular section.
Y is a link making pivotal connection with both the shuttle-case and the bell-lever
at the points y, y¹, respectively. I do not confine myself to making these respective
points of connection in the exact relative positions illustrated, as it is evident that they
may be varied to some extent and the link connection between shuttle-case and
bell-lever be retained both connections remaining pivotal.
The superiority of the mechanism above described for the purpose of guiding the
shuttle case over the one described in the specification of my patent above mentioned
consists in the inability of the shuttle-case to jump. The pivotal connections of case
to link and link to bell-lever are without play, therefore the case cannot move inde-
pendently of the bell-lever, and as the projections or extensions z of the case are bored
to embrace the guide-rod evenly, and as tightly as is consistent with smooth working,
it cannot move vertically.
Referring to Figs. 2 and 3, the handle is pivotted to the boss of the driving wheel F
for the purpose of allowing it to be folded towards the machine. The full lines shew
it as folded up preparatory to the machine-cover being placed over the machine, while
the dotted lines indicate the working position of the handle. A pin w which engages
in the hole w' is provided for the purpose of steadying the working position of the
handle, and of relieving the pivots at the wheel boss of unnecessary strain.
I provide for the ready filling of the shuttle spool from the top spool on the spool
pege by the following device.
"
V is a wire rod carrying a pinion at its upper extremity. The rod and pinion
are held out of gear with the driving wheel by a catch ' on the standard. The pivots
of the shuttle are made to engage in the pinion and in a bearing v² on the standard A.
The end of the thread is led from the top spool through a guide (not shown)
standing above the pulley v, and then fastened to the axis of the shuttle. The rod V
is released from the catch ¹, whereupon the pinion v is immediately pressed against
the driving wheel F with sufficient force to compel it to partake of the motion of the
latter. In Fig. 2, the full lines shew the pinion in gear, and the dotted lines shew it
out of gear.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed I declare that what I claim is :-
The combination of single guide-bar in a plane parallel with the cloth-plate,
projections or extensions of the shuttle-case embracing said bar, a bell-lever actuated
from the crosshead of the machine, and a link making pivotal connection with both
shuttle-case and bell-lever, substantially as and for the purpose described with reference
to the accompanying figures.
Dated this 27th day of June 1887