Year: 1885

page_text: I, CARL FRIEDRICH ERNST RICHARD NAGEL, Manufacturer, of Lindenau Leipzig,
in the Kingdom of Saxony do hereby declare the nature of this invention to be as
follows
The peculiar features of the improved shuttle embroidering machine are vertically
working shuttles, geared in vertical shuttle races, the peculiar movement of the
embroidering needles and the breaking of the threads. The driving levers or
pickers are situated at the lower end of the shuttle race and pivoted on a horizontal
shaft. They receive motion from a revolving cam by means of a pair of levers.
The shuttles are provided at the base with a recess, and the bobbins are so inserted
as to lie with one pivot in a spring and with the other in the lower end wall of
the shuttle; at the same time the said spring presses on the bobbins so as to give
to the threads the necessary tension. The shuttle races may be made of cast iron,
paper, wood etc, or they may only be stamped from wrought iron. A sliding cover
plate is inserted into the shuttle races, which plate may be placed higher or lower
for the purpose of guiding the shuttles accurately and certainly. Besides springs
are cut or formed at the upper ends of these slides and so strained as to project
a little into the shuttle race. These springs serve to hold or retain the shuttles by
means of the recesses in their base, so as to be visible above the shuttle races, when
a shuttle bobbin has become empty or when a needle--or shuttle thread is torn.
In such a case the shuttles are (in consequence of the removal of the resistance
exerted by the used needle-or shuttle thread), propelled by the driving levers
so far, until the spring catches into the said bottom recess and thus secures the
The movement
shuttle in a position, where it is visible above the shuttle races.
of the needle may be obtained in two different ways. In the first arrangement
the horizontal rail carrying the needles is fixed on tube-shaped slide pieces, which
are guided to and fro perpendicularly to the cloth and receive motion from a
revolving cam, mounted on the shaft of the cam which operates the pickers by
means of a sliding post, a lever, a toothed sector and a toothed rack, fixed to the
tubular slide.
Into each of the tubular slides is inserted a bolt or pin carrying in front a rail,
which is arranged to press. the cloth smoothly against the vertical stitch plate
before the needles are working. By a further motion of the tubular slide the axial
bolts or cores are pressed into the same and are again pressed forward by helical
springs, while the needles recede.
In the second arrangement the rail carrying the needles is secured to the ends
of vertical levers. The holding down rail is fixed to another set of vertical levers;

page_text: from which it receives an oscillating movement, and the holding down levers have
a certain amount of lead against the needle carrying levers. The braking or drag
of the needle thread may likewise be obtained in two different ways. The brake
may consist of a suitable number of small clipping discs, arranged in pairs mounted
upon the same axle and held together by interposed tubes. At each extremity of
the said axle a spiral spring is inserted, which allows the clipping discs to be pressed
somewhat asunder. In the moment, that the clipping plates are to drag the
thread, an angular or pointed strip of sheet metal recedes and the clipping discs
clip or drag the thread as long as required. The second arrangement consists
principally of five rails lying side by side and furnished with holes or slits, into
which the thread lays itself or through which it is pulled. In the given moment,
that the thread is to be braked, the rails are lifted or lowered between each other,
whereby the thread is clipped fast. The raising or lowering of the rails is produced
by a revolving cam on the main shaft by means of a lever. A smooth-polished
tension roller, employed in both arrangements, causes the difference between more
or less full bobbins to be compensated.
The machine acts as follows: The spool-threads being drawn round the polished
tension roller and between the clipping rails, or drawn round the clipping discs
and introduced into the embroidering needle, likewise all shuttles being laid into
the shuttle races, the machine is actuated by a crank, the shuttles are vertically
raised by means of the pickers, the needles are set in motion and proceed through
the cloth under the shuttles, the shuttles fall back, the needles attain their lowest
position, recede slightly, and through the loop, formed thereby, the shuttles are
raised and recede for a moment, whereby the shuttle thread is loosened; meanwhile
the needle thread is pulled forth and the loosened shuttle thread is consumed or
drawn out for the following stitch by advancing the cloth by means of the
pantograph; the shuttle is raised high enough to fetch the quantity of thread
required for the following stitch, after which it falls back automatically into its
former position.

page_text: event of a thread breaking or a bobbin becoming exhausted. By use of these
improvements the apparatus may be much reduced in length taking up less room.
In the accompanying drawing, Figs. 1 to 7 represent various constructions of
vertical shuttle races; Fig. 8 shows the shuttles for use therewith and Fig. 9 a
cross section of an embroidering machine showing the impulsion and the arrange-
ment of the vertical shuttles. The shuttles a are actuated in the vertical shuttle
races by means of very simple levers b, which press on the shuttles a from below
and raise the same according to requirement.
Figs. 1 and 9 show the manner of propelling the shuttles a by the lever b.
The shuttle races shown in Figs. 1, 6 and 7 are of cast iron, in Figs. 3, 4 and 5
of wrought iron. In these races are lodged ☐ shaped guide pieces c for guiding
and stopping the shuttles, the said guide pieces are provided with a tongue spring d
and are adapted to be adjusted at pleasure by set screws
Stop devices for the shuttles are placed above the shuttle races, as shown in
Figs. 3 and 4, and serve the purpose of arresting the shuttles, which arrive at the
top of their races, so as to keep them visibly suspended. This happens, when the
bobbins contained in the shuttles have become empty or a shuttle thread is broken,
since in these cases no retarding power is exercised on the shuttle a by the thread,
so that the shuttle is propelled upward more rapidly in the shuttle race A by the
driving lever b so that it reaches the tongue spring d, which catches into a notch m
arranged for this purpose in the shuttle a thus holding the latter visibly above the
shuttle race, as shown by Figs. 3 and 4. By this means it is at once perceptible,
if a shuttle thread is broken or a bobbin exhausted.
The action is as follows: The driving levers b fixed to an axle are set in motion
by an eccentric n through the levers o and p; these driving levers raise the
shuttles a so high, that embroidering can be effected by the needles q.
Having now particularly described and ascertained the [nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:
1) In embroidering machines, vertical shuttle races A for the vertical guiding of
shuttles a propelled by simple non-bifurcated driving levers b substantially as
described.
2) In vertical shuttle races A, guides with recessed spring tongue d for the
purpose of retaining empty shuttles or such, in which the thread is broken
substantially as and for the purpose described.