An Improved Bipartite Needle for Knitting-machines and the like.
Year: 1894

page_text: Date of Application, 11th Apr., 1894
Complete Specification Left, 7th Jan., 1895-Accepted, 2nd Mar., 1395
PROVISIONAL SPECIFICATION.
An Improved Bipartite Needle for Knitting-machines and the like.
I, FRANZ GUSTAV GRÖNROS, of 63, Kromverkscher Prospekt, of Petersbourg,
in the Empire of Russia, Engineer do hereby declare the nature of this invention to
be as follows:-
:-
This invention relates to a bipartite needle, as used in some sorts of knitting and
the like machines. My improvements in such double-needles relate to the con-
figuration of the working parts of the same, and my objects are to facilitate the
formation, connection and transfer of the meshes by means of said improved
configuration. The latter is as follows:-
The lower needle, or the hook-needle proper, has an elevated portion between
the book and the shaft; this portion is on its upper side provided with a
groove.
The upper needle, i.e. the so-called covering-needle, is at its head bent down-
wards, so as also to form a hook. This book extends also rearwards, and has a
groove adapted to let pass the hook as well as the elevated portion of the lower
needle, or to be moved over these parts respectively. The said upper hook termi-
nates in a point, which, when meeting the elevated portion of the lower needle,
takes into the groove within the upper surface of said portion, whilst the two
lateral surfaces of the latter are covered by the two projections formed at the
upper hook by its afore-mentioned groove. Also in this upper needle, the portion
between the hook and the shaft is elevated, the degree of elevation being such
one, that a space remains, if the two elevated portions are laying one over the
other.
If two rows of such double-needles are arranged opposite to each other, each pair
of them will work as follows:
Supposed, the work is held by the hooks of the lower needles, and a fresh row
of meshes is to be formed, the upper needles, the hooks of which have been resting
on the elevated portions of the lower ones, are pushed forward, so that they
leave the hooks of the lower needles behind them. The said upper hooks come
to a standstill as soon as they arrive on the opposite needle-bed, and the lower
needles are pushed then forward in the same direction, so that the meshes, held
back by the edge of the opposite needle-bed, glide upon the elevated portions of
the said lower needle. They are then lying on the grooves within said elevated
portions.
If now, the upper needles are moved backwards, their hooks enter the grooves
of the lower needles, so that the meshes held by these latter are caught up by the
upper hooks, and are, thus, transferred on them. This operation is performed with
greatest security on account of the points of the upper hooks taking into grooves,
so that missing, splitting or tearing of the mesh is perfectly avoided. On the other
hand, the mesh caught up by the upper hook is widened by the two lower or
lateral projections forming the guide for the lower hook, so that the latter
after having caught the thread anew, may draw the same easily through the
mesh.
I wish it to be understood, that I may provide the lower needle also with two
grooves instead of one, and corresponding thereto the upper needle with two hooks
instead of one, or the hook of the upper needle with two points instead of one.

page_text: I then prefer to arrange the said two grooves at the sides of the elevated portion
of the lower needle instead of at the upper surface.
Dated this 9th day of April 1894.
FRANZ GUSTAV GRÖNROS,
By Robert Deissler,
Agent for the Applicant.
An Improved Bipartite Needle for Knitting-machines and the like.
I, FRANZ GUSTAV GRÖNROS, of 63, Kromverkscher Prospekt, of Petersburg,
in the Empire of Russia, 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 :-
This invention relates to a bipartite needle, as used in some sorts of knitting, and
like machines. My improvements in such double-needles relate to the configuration
of the working-parts of the same, and my objects are to facilitate the formation,
connection and transfer of the meshes by meaus of said improved configuration.
The latter is as follows:-
The lower needle A, (Fig. 1) or the hook-needle proper, has an elevated
portion a¹ between the hook a and the shank a²; said portion is on its upper side
provided with a groove, as indicated by dotted lines.
The upper needle B, i.e. the so-called covering-needle, is at its head bent
downwards, so as also to form a hook; the latter extends also rearwards, and
has on its lower side a groove adapted to let pass the hook a as well as the
elevated portion a₁ of the lower needle, or to be moved over these parts
respectively.
The said upper hook 6 terminates in a point 3 which, when meeting the elevated
portion a' of the lower needle, takes into the groove within the upper surface of
said portion, whilst the two lateral surfaces of the latter are covered by the two
projections formed at the upper hook by its afore-mentioned groove.
Also in this upper needle the portion between the hook and the shaft is elevated,
the degree of elevation being such a one, that a space remains, if the two elevated
portions of both the needles are laying one over the other.
If two rows of such double-needles are arranged opposite to each other, each pair
of them will work as follows:-
Supposed the work c (Fig. 4) is held by the hooks a of the needles A. and a
fresh row of meshes is to be formed, the needles B, the hooks of which have
been resting on the elevated portions a¹ of the needles A, are pushed forward, so
that they leave the hooks a behind them. The said upper hooks come to a
standstill as soon as they arrive on the opposite needle-bed C₁ (Fig. 5), and the
lower needles are then pushed forward in the same direction, so that the meshes,
held back by the edge of the needle-bed C¹, glide upon the elevated portions a¹
(Fig. 6) of the needles A. The meshes are then lying on the grooves within said
elevated portions.
If, now, the upper reedle is moved backwards, its hook 2 enters the upper
groove of the lower needle, so that the mesh held by this latter is caught up by
the upper hook (Fig. 7), and is, thus, transferred on it. This operation is
performed with greatest security on account of the points of the upper hooks
taking into grooves, so that missing, splitting or tearing of the mesh is perfectly
avoided. On the other hand, the mesh caught up by the other hook is widened
by the two lower or lateral projections b' forming the guide for the lower book a,
so that the latter after having caught the thread anew, may draw the same

page_text: more easily through the mesh. d (Fig. 7) is the thread, and d the guide for
the same.
The needle B (Fig. 7) having on its hook the last but one mesh is now moved
again lefthand until arriving upon the bed C₁ (Fig. 8); during that time, the
needle A is moved back upon its bed C, so that said last but one inesh is dropped
by hook bb, and the respective portion of the 'ware is held solely by the fresh
mesh lastly formed by hook a.
The ware is now to be transferred upon the needles A¹ of the bed C¹ (Fig. 9).
Needle B as well as B₁ are moved to the right, until the latter arrives behind the
hook a of needle A. The latter is then moved to the left, so that the mesh held by
hook a is lifted upon the elevated portion a¹ (the ware being held back by the edge
of the bed C) Fig. 10.
Needle B is drawn back to the left, so that its point taking into the upper
groove of needle A catches the mesh up (Fig. 11), and holds it back, when there-
after needle A is moved back to the right (Fig. 12). Also needle A¹ is moved to
the right, so as to take behind the thread d, which has been brought into the way
of hook a by the guide
.
Whilst the thread d is caught up by hook a' on the return of needle A', and a
fresh loop is formed thereby, the last but one mesh held up to then by the hook of
needle B (Fig. 12) is dropped by the latter, as needle B₁ is moved over to the
bed C (Fig. 13). Needle B¹ is thereafter drawn back upon bed C1 (Fig. 14), and
the position of the various parts is now the reverse of what it was in Fig. 4. The
movements described with regard to the Figs. 4-14 are now repeated, but in
reverse succession with regard to the needles A B and A¹ B. Therefore, the
succession of the needles, instead of being, for instance, B A B A B B B¹ A
and so on, will be B' A' B' A' B' B' BA¹ and so on. The arrows indicate the
direction of motion.
144
If a ware with open figures is to be produced, the succession of the movements
of the needles is a slightly different one. Supposed, all the needles be in the position
shown in Fig. 4, then first the needles B are moved to the right (compare
Fig. 9); that is to say, not all of these needles are displaced, but only a certain
number of them, according to the configuration of the open figures to be produced.
Thereafter, the corresponding needles A are moved to the left (as in Fig. 10), and
the needles B¹ are withdrawn, so as to catch up the meshes held by the elevated
portions a¹; then the needles A are withdrawn, too.
One of the two needle-beds is now displaced sidewards for a way equal to the
distance between two, three or more needles (according to the figures of the ware),
and a certain number of the needles A is displaced to the left as far as shown in
Fig. 11. Thereafter, the corresponding needles B' are displaced to the right as
far as shown in Fig. 9, and at the same time the needles A are withdrawn to the
right. During this time, the thread is brought into the way of the hooks a, and a
fresh loop is formed, before the mesh last formed is dropped by the hook b³. The
needles B are withdrawn to the bed C, and the position of the parts is again the
same as in Fig. 4. The movements described are now repeated, and the respective
needle-bed is again displaced for a certain way, according to the configuration of
the open figures.
The means for effecting the displacements of the needle-beds, as well as those of
the needles themselves, are known by every one versed in the art in question, and
need, therefore, not be especially described.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a bipartite needle for knitting-machines and the like, the combination with
a lower needle having a hook adapted to catch the thread, and a groove, of an
upper needle having a hook adapted to take into the groove of said lower needle,

page_text: and a groove adapted to take over the hook of the said lower needle, for the purpose
as described.
2. In a bipartite needle for knitting-machines and the like, the combination with
a lower needle having a hook a adapted. to catch the thread, and an elevated
portion a' containing a groove, of an upper needle having a hook adapted to take
with its point into the groove of said lower needle, and a groove formed by pro-
jections 61; the latter being adapted to take over said elevated portion a¹, and to
let pass the hook a, substantially as described.
Dated this 5th dow of Tonuo 1905
FRANZ GUSTAV GRÖNROS,
By Robert Deissler,
38, Alexander Strasse, Berlin, C., Germany, Agent for the Applicant.