DE132765C - - Google Patents

Description

IMPERIAL

PATENT OFFICE

Yes 132765 CLASS 86 c.

The present invention relates to an electric chain thread monitor of the type in which by falling of a guard needle or the like suspended from the chain thread. on a contact bar of the current circuit in the event of a chain thread breakage. The subject the invention now forms the arrangement of such a chain thread monitor in such a way that the contact strips that form the poles of the circuit to form a common double contact bar are united; this double bar offers the falling guard pin two contact surfaces, z. B. top and side, so that the rider-like contact rail encompassing guard needle through their contact with these two contact surfaces the conductive connection of the same and thus the. Establishes an electrical connection.

The accompanying drawing explains the invention on the basis of various exemplary embodiments, namely shows: Fig. 1 the new chain thread monitor attached to a loom, schematically in side view, partly in section. Fig. 2 shows one of the form of Fig. Ι slightly different shape of the guard needle. Fig. 3 shows the guard needle 4 of the Fig. Ι on an enlarged scale.

In the version shown, W denotes the chain beam of the loom, w the warp, H the shafts, L the sley and B the chest tree. Below the latter, the shaft R is expediently arranged so that when the latter is made to vibrate, it releases the shut-off lever S and allows the spring acting on it to move this lever in such a way that it releases the drive belt or the drive coupling for the purpose of shutting down the loom can move out. On the underside of the sley L , an armature 1, 2 is rotatably arranged, one of which protrudes forward and with its front end just extends behind the end of the weft thread guard slide lever T , while the other rear arm of the lever 1 carries the armature 2 of the electromagnet 3 . As soon as this magnet is excited, it attracts the armature 2 and turns the lever 1 so that its forearm is lowered to the level of the arm α , the latter thus tilted backwards from the end of the armature lever ι when the drawer is moved forward, and consequently the shaft R is rotated.

The apparatus for excitation of the magnet 3 with a warp yarn breakage is now arranged to the invention gemäfs in the following way: At each warp yarn depend on the monitor strip 4 of elongate shape of thin sheet (Fig. 1) in which a slot \ ^a is provided, whose upper The end is narrowed by a lateral projection with an inclined lower edge 4 * and through which the chain thread passes above this projection. Within this slot ^a extends transversely to the warp threads w through all guard needles through a line 7 * with one pole of the electrical power source 7 connected bar 5, which is preferably made of metal and in its upper end receives a metal strip 6, which connected by a line η ^α to the other pole of the power source

Claims (1)

is, wherein the bar 5 and the contact strip 6 are isolated from each other. As soon as a Celtic thread carrying a guard needle 4 ripens, it falls vertically downward until the protruding edge 4 * hits the contact strip 6 (FIG. 1). As a result, however, the needle is brought into an inclined position so that it touches the contact strip 5 and thus brings about the closure of the electrical circuit which is formed by the lines η ^α and 7 * and the electromagnet 3, a circuit breaker and the power source 7 in takes up. In the arrangement according to FIG. 2, the contact strip and the contact strip, d. H. the two contacts 5, 6, arranged above the chain thread in a closed contactor, while the chain thread passes underneath through a downwardly tapering slit. However, in all cases the Contact strip and the contact strip in a slot in the hanging strip, and the contact closure occurs only within and not outside of it. Since it is difficult to identify which hanging rail like in yarn breakage and is therefore to bring back in place, so cutouts are provided 4 ^C soft cuttings in normal conditions, all seen from the side, coincide; so that when the thread breaks, the fallen hanging bar can be easily recognized. It has been shown that with ordinary looms equipped with these hanging rails, in which the contacts 5 and 6 are arranged within the hanging strips, the row of hanging strips is a closed one, as it were Forms channel in which the contacts are and thus prevents the accumulation of Fluff or dust are protected, which of course affects the electrical contact of the hanging bars with contacts 5 and 6. It is also desirable to interrupt the circuit through the magnet and so allow the latter to release the contact lever 1 as soon as the shaft jR is rotated to effect the shutdown of the loom. In order to achieve this automatically, a power company is arranged below the breast tree B in the circuit. This consists of a contact spring 9 attached to the chest tree and a similar spring g ^a , mounted insulated on the arm R ^{x of} the shaft R , which springs 9 and g ^{a are} in electrical contact as soon as the parts and the loom are in their normal position is in operation (Fig. 3); but if the arm R ^{x is} pressed downwards to park the loom, the contact spring g ^a moves away from that 9 and the circuit is interrupted. To take away due to the roughness of the moving chain threads To prevent the hanging bars by the latter, a transverse bar 8 in the form of a strip (Fig. Ι and 3) or provided in the form of a rod or a wire. Patent claim: Electric chain thread monitor, in which a monitor needle or the like on a contact rail of the electric circuit is produced, characterized in that they form the poles of the circuit Contact strips are combined into a common double contact bar, which of the falling guard needle two contact surfaces, z. B. top and side, for production of the current circuit. 1 sheet of drawings.