US2215082A - Method of operating pearlknitting machines - Google Patents

Description

Sept. 17, 1940.

METHOD OF OPERATING PEARL-KNITTING MACHINES Filed March 18, 1938 v. w. MEHNERT 2,215,082

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Patented Sept. 17, 1940 PATENT OFFICE METHOD or OPERATING PEARL- KNITTING MACHINES Volkhart Walter Mehnert, Siegmar- Schonau, Germany I Application March 18, 1938, Serial No. 196,724

In Germany March 20, 1937 2 Claims.

The invention relates to pearl-knitting machines and to a method of operating same, and more particularly to pearl-knitting machines disclosed in the U. S. Patent No. 2,087,650, dated July 20,- 1937. pushers holding and conducting the needles at their heads possess a prolongation or extension projecting forward across the opened latch of the needle when coupled and having a knife edge at the bottom surface. By means of these extensions the needle latches are opened and the needles kept at the bottom of the needle channel without the use of further needle covers.

It is an object of the present invention to create further possibilities in a machine of that kind in that the stitches can be transferred from one needle to another by means of the pushers. It is a further object of the invention to enable this transferring of individual stitches to be effected during the working stroke.

Further details of the invention are made more fully apparent in connection with the acto the invention,

Figs. 2-6 the process of transferring a stitch from the needle to the pusher in its Various stages,

Fig. 7 a modified embodiment of the end of 'the pusher on larger scale, and

Fig. 8 is a perspective front end view of the front portion of a pusher.

As shown in Fig. l, the pusher has substantially the same shape as in the above mentioned Patent 2,087,650. The front edge I!) of the extension I projecting beyond the coupling recess 2 is inclined and forms an acute angle with the lower side 28 of the extension. The edge I28 (see Figs. 1 and 8) between the front edge It] and the lower side 20 is sharp and forms a lower knife edge spaced from the bottom sliding edge 2| by an amount equal to the height h of the double ended needle 5 (see Fig. 2). According to the present invention, the inclined front edge i0 is provided with a notch 3 near According to said patent the into the position in which the needle head 9 coincides with the loop-forming member II as illustrated in Fig. 3.

Thereupon the pushers 4 and needles 5 selected by, the Jacquard attachment are pushed forward through the stitches into the position shown' in Fig. 4 in which the stitch 1 is placed behind the latch 6. The selected appertinent pusher 8 of the opposite bed is now driven so far towards the needle 5 that the'notch 3 at its front end is placed above the needle head 9. Then the needle 5 is withdrawn by the pusher 4, the appertinent pusher 8 being carried forward with the same speed so that the notch 3 maintains its positionin relation to the needle head 9 and no change of the relative position between the needle 5 and the appertinent pusher 8 occurs. During this movement the stitch I slides on the needle 5 and closes the pivoted latch 6, and the free end ofthe latter abuts against the inclined front edge l8 being in front of the notch 3 and in the path of the latch Ii. The stitch I having closed the latch 6 slides along the latter into the notch 3 of the pusher 8 as shown in Fig. 5.

Finally the pusher 8 is again slightly withdrawn into the position of Fig. 6 in which the stitch resting in the notch 3 is situated approximately half way between the loop-forming members ll of both beds.

In Fig. 6 the stitch I2 is to be seen lying on an adjacent needle 5'.

After completing the described process of operation the carriage has arrived at the end of its stroke. The needle beds are now displaced relative to each other by the spacing of a needle division. Upon the return stroke of the carriage the needle 5' holding the stitch I2 is pushed forward by the pusher 4' and conducted through that stitch I now facing it. The needle 5 carrying the'stitch l2 now receives also the stitch I,

, so that both stitches are placed on the same needie; the needles 5 which had given off their stitches during the preceding stroke may now, by appropriate Jacquard selection, remain without stitches. I

According to Fig. '7 illustrating a different embodiment of the pusher, the end of the prolongation I has, apart from the notch 3 at the upper side, a shallow indentation l3 at the lower side 1 20 near the lower knife edge I20. Said indentation I3 serves to receive the head 9 of the needle 5 when the pusher 8 is in the position shown in Fig. 7, in which the notch 3 is substantially above the needle head 9. This engagement between the needle head 9 and the pusher 8 serves to hold said parts in alignment. Furthermore,

.the inclined edge ID has the form of a wedge inclined front edge, comprising the steps of forming stitches on the needles, selecting a certain number of needles and transferring the stitches therefrom to the notches of correspondingly selected appertinent pushers opposite said needles during the stroke of the carriage in one direction, displacing the needle beds relative toeach other by the spacing of a needle division during the change of the stroke of the carriage from one direction to another direction so as to place a new number of needles carrying stitches 'opposite to said selected pushers, and transferring the first mentioned stitches from said pushers to said new number of needles during the stroke of the carriage in the other direction, whereby said first mentioned stitches and said second mentioned stitches are placed on the same needles.

2. A method of operating a pearl-knitting machine as claimed in claim 1, in which the transfer of the stitches from the selected needles to the notches of the correspondingly selected appertinent pushers comprises the steps of pushing the selected-needles through the stitches so as to bring the stitches behind the opened latches, moving the selected appertinent pushers into a position in which the notches of the pushers are substantially above the needle heads; withdrawing the needles along the needle bed and moving the appertinent pushers without a substantial change of the relativerposition between the needles andthe appertinent pushers, so that during the withdrawal of the needles the stitches slide on the needles, turn the latches into a position to rest on the inclined front edgesof the appertinent pushers and slide along said latches into I said notches.

VOLKHART WALTER MEHNERT.

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