US1363836A - Device for ascertaining the thread tension on embroidery-machine shuttles - Google Patents

Description

K. BURRI AND F. SUMMER. DEVICE FOR ASCERTAINING THE THREAD TENSION 0N EMBROIDERY MACHINE SHUTTLES.

APPLICATION FILED AUG. 3. 1920.

1,363,835, Patented Dec. 28,1920.

UNITED STAT ES\'PA 'IENT OFFICE.-

KONRAD BURRI, OF HERISAU, AND FRIEDRICH SOMMER, OF ARBON, SWITZERLAND.

DEVICE FOR ASCER'IAINING THE THREAD TENSION ON EMBROIDERY-MACHINE SHUTTLES.

. Application filed August 3,

To all whom it may concern:

Be it known that we, KoNRAD BURRI and FRIEDRICH SOMMER, citizens of the Republlo of Switzerland, residing at Herisau and at Arbon, Switzerland, have invented certaln new and useful- Improvements in a Dev1ce for ascertaining the Thread Tension on Embroidery-Machine Shuttles, of which the following is a specification.

The object of the invention herein described is a device or contrivance for ascertaining the thread tension on embroidery machine shuttles. The contrivance exhlblts two falling weights freed by a common releasing mechanism, of which the one welght is brought into connection with the end of a thread clipped or broken from a thread of the shuttle and draws it out of the same in its fall, and the other of which, after traveling a pre-determined length of drop, limits further drop of the first weight for the time being in such a manner that the tension of the thread can be numerically established from the length of way traveled by the first weight.

The invention is illustrated on the annexed plan or design, and exhibits:

Figure 1 front view,

Fig. 2 transverse section of the contrivance, and t Fig. section to the line E--F of F g. 2.

Fig. (1) is a body or frame on (111611 a rail (2) is vertically situated and easlly displaceable. Above, on the body (1) there is a shuttle bed (3) on which the shuttle is placed. Further, the rail (2) is provided with a thread-clamping device consistingof the two clamps (4:) and (5), together with the spring (6) supported on a bolt. An arm or bearer (7 is mounted on pivot points on the frame (1) with an adjustable weight (8), the latter being attached to a lever or rod (15) provided at its end with a screw and screwed into the arm (7). A rod (9) with upward direction is screwed into the arm (7 and bent or curved at the top, the curved end entering a weighted and turnable releasing hook (10), the movement of which is limited by a forked stop (11). The releasing hook (10) is provided with a handle (12). polnter or index attached to the rall (2) is supported by the curved end of the rod The latter thus prevents the rail (2) from falling when it is in this upper position. A

i Specification of Letters Patent.

Patented Dec. 28, 1920.

1920. Serial No. 401,019.

longitudinal slot or notch (14:) is in the lower part of the rail (2),and, attached to or formed on the lower end of the lever or rod (1 5), is a wedge-shaped nose (15) that enters the slot 14% when lever 15 rotates on its pivot. The device or contrivance operates in the following manner :The handle (12) is pressed down, so that (Fig. 2) the righthand part of the releasing-hook 10 comes against the lower stop of fork 11). The weight (8) in its fall draws the curved or bent end of the rod (9) over the hook (10) and thus releases the support of the rail (2), 2'. e. the pointer (13); hence the rail is borne down by its own weight and, in moving down pulls the end of the thread clamped between the tighteners or clamps (at) and (5) out of the shuttle. As soon as the weight (8) has traveled a certain length of way, the nose (15) on the lower end of the rod (15) moves into the longitudinal notch (14-) of the rail (2). By this means both the rail and the weight (8) are prevented from further falling. The tension of the thread on the length of way traveled by the rail (2) can then be numerically established by reading the scale (16).

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is 1. In a device for testing the threads of embroidery shuttles which comprises a support for the shuttles, a weight attached to the shuttle thread, a second weight mounted to arrest the fall of the first weight after a predetermined length of time and means common to both weights to simultaneously hold the weights and to release them.

2. In a device for testing the thread of embroidery shuttles, a shuttle support, a vertically movable rail having a slot therein, a pivoted weight having means for entering said slot and arresting said rail, and means for attaching a shuttle thread to said rail, a scale for indicating the length of drop of said rail and means for holding and releasing the weights.

3. In a device for testing the thread of embroidery shuttles, a frame, a shuttle support on said frame, and vertically slidable rail therein having a slot at its lower end,

a pivoted lever, a weight adjustable on said lever, the lower end of said lever arranged to enter said slot and arrest saidrail,

ill)

a scale on the frame, an index on said rail and means for simultaneously holding and releasing said rail and weighted lever.

A device for testing the thread of embroidery shuttles, Which comprises a frame, a shuttle support on said frame, a vertically slidable rail mounted in said frame, means on the rail for securing the end of a shuttle thread, a pivoted lever, a weight adjustable on said lever, the lower end of said lever arranged to engage and arrest the fall of said rail, a scale on said frame, an indicator on said rail movable along said scale, means for simultaneously holding the rail and lever in raised position and for simultaneously releasing them. 7

5. In a device for testing the thread of embroidery shuttles, a frame, a"rail vertically movable in said frame a lever pivoted on the frame and arranged to arrest the fall of said rail, a shuttle support on the frame, means on the rail to hold the end of a shuttle thread, an index on the rail, a rod on said lever capable of extending under said index when rail and lever are in raised position, and a pivoted hook engaging the end of' said rod, whereby when said hook is released said rod will move from under said index and the rail and lever be simultaneously released.

In testimony whereof We affix our signatures in presence of two Witnesses.

KONRAD BURRI. FRIEDRICH SOMMER.

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