US1858777A - Jacquard-design-mechanism for flat knitting machines - Google Patents

Description

C. HILSCHER- May 17, 1932.

JACQUARD DESIGN MECHANISM FOR FLAT KNITTING MACHINES Filed Au 16, 1928 Patented. May 17, 1932 v UNITED STATES CUBT HILSCHER, OF CHEMNITZ, GERMANY JACQUARD-DESIGN-MECHANISM FOR FLAT KNITTING MACHINES Application filed August 16, 1928, Serial No. 300,025, and in Germany August 18, 1927.

The invention relates to a j acquard-designmechanism for flat knitting machines in which in a known manner foreach sectlon a special exchangeablejacquard card is proare, by means of the spring action, intro-' duced into the holes of the jacquard card and thereafter broughtinto their top working position by the positive action of the rods.

After the corresponding needles have been brought into working position by means of a rock meinber, and the desired design is pro duced by the needles, they are moved from this position by the same rods downwards into their lowest position where they are positively held.

The advantage thus obtained is that the jacquard fingers or jacks being under spring pressure work in cooperation with only one set of actuating rods, which act simultaneously as arresting devices and motivating mechanisms so that the arrangement'of the knitting machine is simplified and accurate cooperation of the jacks is effected with only the single set of actuating rods acting as a combined arresting and motivating mechanism.

The invention is shown in the drawings in one form of construction by way of example with the jacks in difl'erent positions. 1 to 8 indicate successive positions taken 'y the several parts during one complete cycle of operation of the actuating means, as is more fully explained below.

There are shown by way of example two ofa series of jacks A, A lying one behind the other and pressed upward by the springs H, H fixed in the spring holder J, against and into the jacquard card L. The jacks have at their bottom end the shoulder P and on the opposite longitudinal side a broadened portion Q, preferably having its upper end slanting to form an oblique shoulder or cam surface. M is a rock member positioned by the motion of the jacks, being pivoted at the point M said rock member acts with its lower'end upon the needle N which is fixed within the holder for the needles, 0.

Adjacent the jac'ks, there is provided a set of actuating rods and levers C, D, E, F, G, acting as an arresting and motivating "M mechanism in which E and G are the main actuating rods, being moved in the manner to be set forth, by appropriate mechanism not shown. The bell crank CD is pivoted at the point S, while the lever F is pivoted on the "=5 pin T positioned on the lever C. B is a finger arranged on the lever F, and K is a sprocket wheel arranged for moving along the jacquard card Lina well-known manner.

The ]acquard mechanism described above in acts as follows:

By means of the finger B the jacks A, A normally urged upward under spring pressure, are held in their lowest position in such a manner that they, with their needle-like 7o top-parts, stand off a certain distance from the card L, whereby the moving along or switching of the card L by means of the sprocket wheel is easily effected, in a wellknown manner. (See Fi 1.)

When the switching is nished,.the finger B is, by lifting the actuating rod E so as to turn the levers C and D, moved away from the bottom shoulder P of the jacks, so that the latter may be pressed upwards by the 8 spring through the hole provided in the jacquard card L, whereupon the shoulders P will come into the position above mentioned. (See Fig. 2.)

- Thereafter the distributing finger B is swung by means of the lever-rod arrangement C, D, E towards the jacks and gets under the shoulders P of those jacks which have entered holes in the card. (See Fig. 3.)

By means of the actuating rod G and the lever F (particularly by pulling down the former) the finger B is swungv upwards and moves the jacks into the top working position (see Fig. 4). At the same time the rock member M is, by means of the oblique shoulder and broadened portion Q of the jack A tered the openings, whereby the members are turned around the point M whereupon the opposite end contacts with the corresponding needle N, which is thus placed in position to undertake the work fixed by the design (see Fig. 4). r

This being done, the lever-rod system C, D, E again withdraws the finger B from its cooperative position (see Fig. 5).

By means of the rod G and the lever F the finger B is then turned upwards so far that it assumes a position on a level above the shoulder P of the jack A (see Fig. 6).

In this highest position of the finger B e the latter will, on pulling down the rod E,

be superimposed on the shoulder P of the jack.'(see Fig. 7). moved upwards in such a manner that, by means of the lever F and the finger B, the jack is pushed down into its lowest position. Thereby the jack is brought out of the hole of the jacquard card, so that the latter can 7 again be switched along by means of the sprocket wheel K in a well-known manner.

By withdrawing the jack A into its lowest position, the rock member M is freed from the broadened portion Q, and pressed back into its position of rest by the tension of the needles, (see Figs. 8 and 1).

Thus the whole mechanism is again in a position of rest and ready to begin its work afresh.

What I claim is: 1. In a jacquard mechanism for flat knitting machines, a jacquard card having open ings therein, jacks movable toward and from said card, means for resiliently urging the jacks toward the card and into the openings, fixedly mounted covering needles, members adjacent the jaclzs and adapted to act upon the needles of the machine when said jacks are in their advanced position, and actuating means arranged to advance those jacks which have entered the openings, to withdraw'the jacks from the openings, and to hold the jacks out'of engagement with the card. 2. In a jacquard mechanism for flat knitting machines, a jacquard card having openings therein, acks movable toward and from said cards, means for resiliently urging the jacks toward the card, laterally projecting shoulders on said jacks and actuating mechanism adapted to engage said shoulders for positively moving the jacks into and out of operative position.

3. In a jacquard mechanism for flat knit I ther advancing those jacks which have em Thereupon the rod G is caused to act upon the selectedneedles.

In testimony, that I claim the foregoing as my invention,I have signed my name this 1st day of August, 1928. I

CURT HILSCHER.

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