Year: 1887

page_text: Date of Application, 17th Jan., 1837
Complete Left, 24th Oct., 1887
Complete Accepted, 25th Nov., 1887
We, JOHN JACKSON of Lionel street, Birmingham, in the county of Warwick,
Engineer, and, PATRICK ALPHONSUS MARTIN of 26, Great Charles street, Birmingham
in the county of Warwick, Manufacturer do hereby declare the nature of this
invention to be as follows :-
Our invention relates to the formation of Sewing Machine Shuttles, and Bobbins,
and has for its object a simple and ready means of removing and affixing the bobbin
in the shuttle, and regulation of its tension. We construct our invention in the
following manner. The shuttle portion we form (by preference) of thin sheet steel.
We take a strip of thin sheet steel and bend it U shape, one side being longer than
the other, and we continue bending the long side curved or are shaped untill it
crosses the shorter side, then we reverse turn the end, till it comes opposite, and in
a line with the shorter side, this end we taper, or cone, and use as the point of the
shuttle. The end of the shorter side we leave much wider than the width of the
opposite or longer side. (This is an important feature in the formation of the shuttle,
as it greatly facilitates the passing of the whole of the shuttle, through the loop).
We pierce a small hole in the centre of the shorter side, and a similar hole directly
opposite, in the wall of the longer side, and we form straight grooves, or gutters, in
the inner sides leading from the holes to the outer edges, for the purpose of guiding
the insertion of the bobbin. This formation of shuttle can be bent cold. We form
the spool or bobbin by securing a thin flat metal disc, or washer, near each end of a
round shaped spindal or shaft, having its ends projecting beyond the discs, so that
they may slide down the gutters in the shuttle formation, and lodge in the holes.
The spring in the curved back of the shuttle, causes the inner sides of the shuttle to
grip the discs of the bobbin, with sufficient force or tension, to prevent its dislodge-
ment when rotating, and also tension the unwinding of the bobbin, but, without
regulation of this pressure, which may be applied either to the sides, edges, or ends
of the bobbin, the tension or strain upon the cotton increases considerable, (even to
breaking) as it gets nearer the centre line of the spindal, and again, as the friction is
directly applied to the bobbin, it necessitates that the cotton should be tightly and

page_text: evenly wound, or it will bind and break. To obviate these vital contingences, we
form the portion of the shaft between the washers of increased diametre, so that the
unwinding may be effected within a confined radius, or we construct our bobbin in
two parts, one part as a spindal and disc, and the other part as a barrel, or tube and
dise. Thus when the spindal is placed in the barrel, and the cotton wound on the
barrel in between the discs, and inserted in the shuttle, the spindal and dise portion
would be gripped stationery, and the barrel and disc portion would revolve, and so
the friction obtained by the pressure of the rows of cotton against the stationery disc,
would be reduced as the cotton was unwound and so regulato the increase of tension
caused by getting nearer the centre. To automaticaly and evenly wind these hobbins,
we mill or serate the edges of the discs, and run them direct upon the rim of a wheel,
which is also milled or serated. To insert the spool or bobbin in the shuttle, we
spring it in down the gutters, and to remove it we extend the sides of the shuttle by
pressing it upon a tapered hob, or by inserting a small wedge, or the finger nail
Datod this 13th day of Jonna 1907

page_text: COMPLETE SPECIFICATION.
Improvements in Sewing Machine Shuttles and Shuttle Bobbins.
We, JOHN JACKSON of Lionel Street Birmingham in the County of Warwick,
Engineer, and PATRICK ALPHONSUS MARTIN of 26 Great Charles Street 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:—
Our invention relates to the formation of Sewing machine shuttles and bobbins and
has for its object a simple and ready means of removing and affixing the bobbins
in the shuttle, and regulation of its tension. We construct our invention in the
following manner :-The shuttle portion we form (by preference) of thin sheet steel :-
We take a strip of thin sheet steel and bend it into a U shape one side being longer
than the other and we continue bending the long side curved or are shaped until it
crosses the shorter side, then we reverse turn the end until it comes opposite and in a
line with the shorter side this end we taper or cone and use it the point of the shuttle.
The end of the shorter side we make much wider than the width of the opposite or
longer side (this is an important feature in the formation of the shuttle as it greatly
facilitates the passing of the whole of the shuttle through the loop). We pierce
a small hole in the centre of the shorter side and a similar hole directly opposite in
the wall of the longer side to take spindle of the bobbin and we form straight grooves
or gutters in the inner sides leading from the holes to the outer edges for the purpose
of effecting the insertion of the bobbin.
The invention is illustrated in the accompanying sheet of drawings whereof :-
Figs. 1 and 2 show in plan and side view respectively a shuttle constructed
according to this invention; a is the longer and the shorter side, in these sides
holes care pierced directly opposite each other, and the straight grooves dd lead
from the outer edges of the shuttle sides to said holes, for the purpose of guiding the
insertion of the bobbin.
Figs. 3 and 4 show in plan and side view another form of shuttle in which the
back end of the shuttle is open and the part e. is bent conical, the bobbin will in this
case be placed into the shuttle from the open end, gutters being provided for this
purpose as before. The small swell e' is for the purpose of taking into a small recess
formed in one of the discs of the bobbin to prevent it from revolving as will be
hereinafter described.
Figs. 5 and 6 show in plan and side view another form of shuttle similar to that
shown in Figs. 1 and 2 but that the ends of the strip forming the shuttle meet at the
back instead of at the point of the shuttle.
Fig. 7. shows one form of bobbin we use.
او
We form the spool or bobbin by securing thin flat metal discs or washers
near each end of a round shaped spindle or shaft having its reduced ends h¹ h³
projecting beyond the discs, so that they may slide down the gutters d in the shuttle
sides and lodge in the holes c. The spring in the curved back of the shuttle causes

page_text: the inner sides of the shuttle to grip the discs of the bobbin with sufficient force or
tension to prevent its dislodgement when rotating, and also tension the unwinding
of the bobbin, but without regulation of this pressure which may be applied either
to the sides, edges, or ends of the bobbin, the tension or strain upon the cotton
increases considerably (even to breaking) as it gets nearer the centre line of the
spindle, and again as the friction is directly applied to the bobbin it necessitates
that the cotton should be tightly and evenly wound or will bind and break.
To obviate these vital contingencies we form the portion of the shaft between the
washers of increased diameter so that the unwinding may be effected within a
confirmed radius. Or we construct our hobbin as shown in Fig. 8 in two parts, one
part as a spindle and dise and the other part as a barrel or tube and disc ¹ thus,
when the spindle is placed in the barrel (as in Fig. 9) and the cotton wound on
the barrel in between the dises and inserted in the shuttle as shown in Fig. 10, tho
spindle and disc portion & would be gripped stationary by means of the small recose 2²
fitting over the swell e' provided for the purpose in the side of the shuttle Fig. 3,
and the barrel and disc portion resolve, and so the friction obtained by the pressure
of the rows of cotton against the stationary disc is reduced as the cotton is
unwound and so regulate the increase of tension caused by getting nearer the centre.
To automatically and tightly wind these bobbins we mill or serrate the edges of the
dises and run them direct on to the rim of a wheel which is also milled or serrated.
To insert the spool or bobbin in the shuttle we spring it down the gutters, and to
remove it we extend the sides of the shuttle by pressing it upon a tapered hob, or by
inserting a small wedge, or the finger nail.
Having now particularly described and ascertained the nature of said Invention,
and in what manner the same is to bo performed, we declare that what we claim is :-
Firstly. The construction of shuttles for sewing machines from sheet metal having
the required elasticity by shaping the metal and forming two flat sides which grip
and hold the hobbins and afford bearings for its spindle substantially as herin
described and illustrated in the annexed drawings.
Secondly. The construction of shuttle bobbins as herein described with reference
to Figs. 7 and 8 respectively for the purpose of regulating the unwinding or delivery
of the cotton or thread substantially in the manner set forth.
1 1
101
1007
Dated this
101
day of October
1000
JOHN JACKSON.
PATRICK ALPHONSUS MARTIN.