US1101608A - Embroidering-machine. - Google Patents

Description

R. ZAHN, DEGD.

A. RIETZSOH, ADMINISTRATOR.

EMBROIDERING MACHINE.

APPLICATION FILED QEPT. 20, 1912.

Patented June 30, 191% COLUMBIA PLANOGRAPM c.

UNTTED STATES PATENT @FFTCE.

ROBERT ZAHN, OF PLAUEN, GERIIIANY; ALFRED RIETZSCE ADMINISTRATOR OF SAID ZAHN, DECEASED.

EMBROIDERING-MACHINE.

Specification of Letters Patent.

Patented June 30, 1914.

. Application filed. September 20, 1912. Serial No. 721,473.

To all 007mm it may concern Be it known that 1, ROBERT ZAHN, a subjcct of the German Emperor, residing at Plauen, Vogtland, in the Kingdom of S2LX ony, Germany, have invented certain new and useful Improvements in Embroidering- Machines, of which the following is a specilication.

It is well known that with ordinary or non-automatic shuttle embroidering Inachines the operator has to slacken the needle thread before the boring operation begins. Such slackening of the needle thread takes place at the moment when the fabric frame is vertically displaced to such an extent that the places of the embroidery fabric at which just a little while ago the needles have been operating come into the range of the points of the borers.

In accordance with the present invention the slackening of the needle thread is effected automatically. The thread take up mechanism is released from the driving means and during the entire period of boring is held in such a position that the thread is slackened, while the main shaft of the machine is allowed to run with its usual speed.

One embodiment of my invention is illus trated in the accompanying drawing in which similar reference letters denote corresponding parts and in which Figure 1 shows the thread take up mechanism in operating position and Fig. 2

' shows the same in released position.

In the drawing which forms a part of this specification 1 denotes the main shaft of the embroidering machine, which carries the thread controlling cam 2. Rolling on the circumference of this cam by means of a roller 3 is a double armed lever 3. The thread take up mechanism consists of the bell crank levers 5, 7 pivotally connected to one another by a rod 6, which is actuated bv a spring 15, one end of which is secured to the frame 18 and the other end to the rod 6. Pivotally connected at one end to the bell crank lever is a coupling rod 4, the other end of which is pivotally connected to a rod 1 1 and which is provided with a notch 41 capable of engaging the lever 3. Fulcrumed in the frame 18 is a bell crank lever 13 which by a pin 13 slidably engages a loop or notch 14: provided in the rod 1 1. One arm of this lever 13 by a spring 17 is connected to the rod 14:. The other arm of the bell crank lever 13 is pivotally connected by a rod 12 to a double armed lever B fulcrumed at 8 to the frame. This double armed lever is connected to the rod 10 which in well known manner is operated from the jacquard mechanism denoted by the box 9. The double armed lever 3 is formed with a cam shaped projection 8 and the bell crank lever 5 with a nose 5 adapted to be operated by said cam to slacken and temporarily maintain the thread in slackened state.

The mode of operation is as follows: In passing from ordinary embroidering to boring the jacquard mechanism automatically causes in well knownmanner the rod 10 to rise, whereby the lever 8 is tilted so that its cam 8 is moved toward the projection 5 whereby the levers 5, 7 are tilted into the position shown in Fig. 2 in which the thread 16 is slackened. Simultaneously through the medium of rod 12 the lever 13 is turned which through the medium of the rod 141 lifts the coupling rod 4 out of engagement with the driven lever 3. Thus the thread take up mechanism is uncoupled from the driving means, which are continued to operate with the usual speed.

The thread 16 remains in slackened state during the entire boring operation. Now when passing from boring back to ordinary embroidering the rod 10 is automatically pulled down by the jacquard mechanism whereby the cam 8 iscaused to release the bell crank levers 5, 7 which owing to the spring 15 return into their initial position tensioning the thread 16 and simultaneously the lever 13 is tilted back, whereupon the spring 17 through the medium of the rod 14 presses the coupling rod 4 onto the lever 3, which in its turn is caused to reengage the notch 4 thereof coupling the thread take up mechanism to the driving means. It is understood that the means above referred to may also be used at the transition from embroidering to any other special function, where the slackening of the needle thread is required.

What I claim and desire to secure by Letters Patent is:

1. In a jacquard embroidering machine, the combination with the main driving means and the needle thread take up device, of jacquard controlled means adapted to normally couple the said take up device to said driving means and at the transition from embroidering to any special function to automatically uncouple the said take up device from the said driving means and to simultaneously put the take up into and main- I tain the same in a position in which the needle thread is slackened.

2. In a jacquard embroidering machine, the combination with the main driving means and the needle thread take up device, of a releasable connection between said take up device and said driving means and a jacquard controlled means adapted at the transition from embroidering to any special function to automatically uncouple the said take up device from the said driving means and to simultaneously put the take up into and maintain the same in a position in which the needle thread is slackened.

8. In a jacquard embroidering machine, the combination with the main driving means and the needle thread take up device, including the spring actuated needle thread take-up levers, of a releasable connection between said levers and the said driving means and a jacquard controlled means adapted at the transition from embroidering to any special function to automatically uncouple the said levers from said driving means and to simultaneously put said takeup levers into and maintain the same in a position in which the needle thread is slackened.

4. In a jacquard embroidering machine,

the combination with the main driving means and the thread take up device, of a spring actuated releasable connection between said talre up device and the saiddriving means and a jacquard controlled means adapted at the transition from embroidering to any special function to automatically uncouple the said take up device from the said driving means and to simultaneously put said takeup device into and maintain the same in a position in which the needle thread is slackened.

5. In a jacquard embroidering machine, the combination with the thread take up device, and the driven lever controlling the latter, of a coupling member bet-ween said take up device and said lever and jacquard controlled means operatively connected to said coupling member and adapted to cooperate with the said take up device so that at the transition from embroidering to any special function the said coupling member will be automatically disengaged from the said driven lever and simultaneously the said take up device will be put into and maintained in a position in which the needle thread will be slackened.

In testimony whereof I affiX my signature in presence of two witnesses.

ROBERT ZAHN.

Witnesses:

A. CURTIS ROTH, ROBERT HEINRIGH VIER.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C.

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