Look-stitch Sewing-machines.
Year: 1887

page_text: Date of Application, 3rd May, 1887.
Specification Accepted, 12th July, 1887.
[Communicated from abroad by GEORG GOTTWALD BEITZEL and JENS CARL
BEITZEL, both of Copenhagen, in the Kingdom of Denmark, Manufacturers.]
Look-stitch Sewing-machines.
I, HERBERT JOHN HADDAN, of the firm of Herbert & Co., Patent Agents, of
67 Strand, London, 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 :-
Ordinarily shuttle sewing machines among other objections, have this disadvantage,
that the upper-thread after being intertwined with the lower-thread has not the
necessary tension-the thread not only being checked in passing round about the
spool but its retrograde movement especially prevented thereby, so that it does not
find any free opening between the shuttle and the shuttle-carrier at the moment when
it is drawn from the shuttle.
I remedy this by means of a peculiarly constructed shuttle-carrier, in which the
shuttle is borne upon two opposite points and in which a to-and-fro movement is given
to the shuttle, alternately moving the same onto one or other of these points so that
in front of the thread there is a free and unimpeded passage for it, between the shuttle
and the opposite bearing point.
The same object is also attained by certain modifications.
The invention is performed as follows, reference being made to the drawings in which-
Fig. 1 represents the horizontal axle below the sewing-plate with the shuttle-
mechanism and the shuttle carrier A. S. C. in longitudinal section. Fig. 2 shows the
shuttle seen from above and in perspective, n is the pivot for the spool; Figs. 3 and 6
show the spool; Figs. 4 and 5 the spool holder; Fig. 8 shows the ring with the
shuttle-carrier and Fig. 9 the same ring but showing also the shuttle with the spool in
their bed as well as showing the external side of the spool-holder.
A is the sewing-plate, which is cast with a vertical stand B, in which the axle C is
journalled. To the stand B is firmly screwed a disc D, in which is sunk an eccentric
passage d. On the axle C is firmly attached a disc E, which diagonally through its
centre has a groove in which the shuttle-carrier F is moved; in Fig. 8 this disc is
seen from above and likewise the shuttle-leader F which is placed across the disc; the
shuttle-leader F has the form of a rectangular plate. The shuttle carrier engages
וכם....מ

page_text: with the shuttle by means of hooks I on both ends, which fit in corresponding slots m
in the shuttle; on the under side the shuttle-carrier has a depending stud, which, as
shown in Fig. I depends in the eccentric groove in the plate D. On the turning of
the axle C the shuttle-leader gets thereby a backward and forward movement seizing
the shuttle now with one hook and now with the other, in such manner that the
hook which is not engaged leaves a free aperture in the shuttle, and through this
aperture the thread has always a free movement. In Fig. 1 the hook engages the
shuttle below, but in the upper part as well as in the underpart the shuttle has a free
space for the thread. G is the shuttle, g the hook for seizing the upper thread. The
dotted lines in Fig. 8 show the eccentric path or groove in the dial D. Outside on
the spool-holder (Figs. 4 and 6) is fixed by the screw r a flat steel spring K under
which the thread from the spool is led and obtains a certain tension.
L is a small
handle, and M is a hook on the pivot N which holds the spool-holder. S is the ring
which forms the bed for the shuttle seen in side section in Fig. 1, but in elevation in
the other figures.
The same shuttle movement which is attained by means of the described movement
to and fro of the shuttle-carrier can also be produced by a modification, which is shown
in Fig. 10, where the same letters signify the same parts as shown in Fig. 1. The
shuttle-carrier F has in this case imparted to it an oscillating movement, on the
pivot placed in the axle. The disc Dis enlarged at E¹ on the side of the plate
which is turned towards the shuttle-carrier. In a groove on the disc E is placed the
spiral spring 9, which continually presses the one end of the shuttle leader up towards
the shuttle, but in consequence of the enlargement E¹ on the immovable dial D, the
hooks I are alternately forced into the slots m on passing the enlargement during the
rotation of the axle. The shuttle is arranged in the same manner as before mentioned
and shown in Fig. 2 as well as in section in Figs. 1 and 10. Figs. 11 and 12 show a
further modification attained by employing an extra shuttle-carrier, which seizes the
shuttle about the middle of the revolution. This extra shuttle-carrier the movement
of which is regulated by the aid of an eccentric is then carried forward in such
a manner that, where the thread is drawn from the shuttle, it has a greater velocity
than the shuttle-carrier proper; at this place a free aperture will then arise between
them, and through this the thread will then find a perfectly free and unimpeded.
passage. The shuttle-carrier proper R, consists of an erect circular edge which is
attached to the dial E; this shuttle-carrier pushes from behind the shuttle G and it
finds room on the side of the shuttle where a part of this is cut away (Fig. 2). The
extra shuttle-carrier, which is designated by dotted lines, consists of a two-armed
lever P, which is moved by a fixed excentric, and pivoted to the shuttle carrier proper.
In Fig. 11 its short arm touches the lowest point of the eccentric and is then out of
activity. In Fig. 12 on the contrary the short arm is touched by the highest point of
the eccentric. This drives forward the longer arm of the lever P upon the shuttle
carrier and causes it to press against a knob t on the shuttle by which means the
latter is pressed forward beyond the shuttle-driver proper R whereby there arises an
aperture between them as shown by the number 5 Fig.-12, so that the thread can be
drawn unimpeded through it from the shuttle after the noose passes the spool.
By all the three constructions described for the movement of the shuttle is obtained
among other advantages the very essential one, that a relatively large spool can
be placed in the shuttle. If the shuttle-carrier is placed as shown in Figs. 1 and 10
behind the shuttle, then the spool can also occupy the place, which the shuttle-carrier
occupies outside the spool in other constructions and there is likewise gained a space
for the spool in the construction shown by Figs. 11 and 12, where the shuttle-carrier
has a position on the one side of the shuttle.
Having now particularly described and ascertained the nature of said invention,
and in what manner the same is to be performed, I declare that what I claim is :-
1. A shuttle-carrier with a to-and-fro movement and a hook at each end for
operating a shuttle, as shown in Fig. 1, by moving round an eccentric on a horizontal
axle and engaging the shuttle.

page_text: 2. A shuttle-carrier for operating a shuttle with an oscillating rotary movement
around a fixed centre in a horizontal axle, as shown by Fig. 10.
3. A two armed or arched shuttle-carrier operated in or on one side of the partly
cut away outer ring of the shuttle and moved by its horizontal axle and the employ-
ment of an extra two-armed shuttle-carrier, oscillating round a fixed pin and put in
motion round an eccentric placed on the horizontal axle, as shown by Figs. 11 and 12
and mentioned above.
4. The giving the extra-shuttle-carrier a greater velocity than the shuttle-carrier
proper as illustrated and described with the shuttle carrier placed either behind the
shuttle or on the side of it for the purposes set forth.
H. J. HADDAN.
By Herbert & Co.,
67, Strand, Agents.