DE105C - Automatic thread guide on bobbins for sewing machines with shuttle - Google Patents

Description

1877.

Class 52.

MAX GRITZNER in DURLACH. Automatic thread guide on bobbins for sewing machines with shoelaces.

Patented in the German Empire on July 24, 1877.

This invention aims to do the work of winding threads on the sink of the Ships for sewing machines by means of mechanical devices in a faster and more regular manner Way to get it than before without such an auxiliary device through which the thread reciprocating human hand could happen.

The invention consists in the back and forth guide of the thread by means of an alternate after forwards and backwards rotating screw (or, as its equivalent, a screw wound over an axis Spiral spring) or by means of two rotating in opposite directions Screws (or spiral springs wound over an axis) - in connection with one another rotating ship sinks.

Fig. Ι (together with cross-sections Fig. 2, 3 and 4) shows one of the forms of this invention. The spool α lies with its tips freely playing on the right in the center recess of the axis head b, which is provided with a driving pin ^ reaching into the perforated coil disk c , and on the left in the center recess of the sliding pin e, which is to the left (for the purpose of inserting the coil) be pushed back against the pressure of the spiral spring f , but cannot step out further to the right than the adjustable nut g allows. On the axis of the head b sits a toothed wheel h in engagement with a toothed wheel of the same size i on axis j, on which the wheel k encased with a rubber ring is fastened. By attaching the entire apparatus to a sewing machine in such a way that the circumference of the small wheel k is brought into contact with the circumference of the sewing machine flywheel, the apparatus is set in motion. On the axis / there is a second cogwheel / of the same size as cogwheels i (and h). The ax m provided with a screw thread is provided at the right end with a saddle ο on which the gear η is allowed to slide right and left, while this gear η (by virtue of its alternating engagement in the gears h and Γ) the screw axis m alternately forwards or backwards in rotating motion. This shift to the right and left (for the purpose of alternating engagement with the gears h and I , which are in opposite rotation) is done by a fork / which is attached to the sliding axis q and which guides the gear η laterally. This sliding axis is limited in its movement to the right by the head r so that the gear η is in engagement with the gearwheel /, and is limited in its movement to the left by the fork // attached to the apparatus frame so that the gear η is in engagement with the half of the toothed wheel protruding beyond the toothed wheel / h . By shifting the gear η , the screw axis m located in fixed bearings will be rotated alternately forwards and backwards. Two pins t , which can be regulated by adjusting screws ί, protrude forward from the sliding axis q. Under the sliding ax q there are two pins v, which can also be regulated by adjusting screws w, on a fixed rod. A flat spring y fastened by means of the screw head χ exerts a slight pressure on the sliding axis q in order to prevent the axis q from shifting itself as a result of accidental vibrations. On the screw axis m , a nut ζ moves to the right or left depending on the rotation of the screw axis, and the nut is prevented from rotating by the guide rod G. The mother ζ carries an eyelet H, by means of which the thread coming from a large bobbin and hung in this eyelet is fed to the rinse α , and is guided back and forth to the right and left during winding. The ratio of the cogwheels h, I and the cogwheel n, as well as the pitch of the screw in, are such that during one revolution of the bobbin α the eyelet H by the thickness of a thread no. 30 (English numbering) moves sideways. This thickness number is chosen because experiments have shown that at this distance even the finest thread numbers (e.g. up to No. 200) are reasonably close enough to one another. The upper end of a spring / is attached to the nut ζ , the lower end of which is free and plays between the pins 11 and ν ν . In the position shown in Fig. 1 of the spring / the same is (already bent) on the pin v, which is located on the left, and when the eyelet H has reached the left end of the bobbin α intended for thread take-up, of slide off the pin ν and against the pin (the left one) t

Claims (1)

hit and thereby move the sliding axis q and with it the fork p and the gear η to the left, and bring the latter into engagement with the gear h , whereby the movement of the screw axis m is reversed and the nut ζ is set in motion to the right until the Spring / sliding over the pins ν and υ (right) at the time when the eyelet H (reached the left end of the thread spooler) hits against the pin t (the one on the left) and thereby another reversal of the screw axis rotation and, as a result of its return, the nut and Will cause eyelet to the left, and so on. As can be seen, the apparatus can be made usable for sinks of greater or lesser length, i.e. for sewing machines of all systems, by appropriately adjusting the left-hand pins t and ν and the adjusting nut g. In Fig. 5 the apparatus is shown with the omission of the eyelet nut and the parts which effect the automatic reversal of the movement. The thread is placed directly around the screw m for the purpose of feeding it to the sink, and when it has reached the end of the sink in question, the movement is reversed by shifting the sliding axis q with the hand. In Fig. 6 the part of the screw axis leading the thread is replaced by a smooth axis over which a sufficiently strong spiral spring J- is wound, which the latter can be made narrower or wider by a nut K. Instead of the nut ζ , a blunt cutting edge L is used here, which lies between the spiral on the smooth axis and is also moved to the right and left by the spiral rotating with the screw axis, as in FIG . Through this change the apparatus (by means of regulation of the nut K) can be precisely regulated for all thread thicknesses. In Fig. 7 two screw axes # z 'and τ » ² are shown with the bobbin α, always rotating in opposite directions, to which the thread (either by hand or by an automatic reversing device) alternately in the positions M ¹ and M ^% is created. 8 shows between the two oppositely rotating screw axes m ¹ and m ² a piece JSF which carries the thread eyelet ZT, slides on rod O and rotates around it and which is applied with half nut threads once to the left and then to the right of the relevant screw axis. The screws of all devices can be replaced by adjustable spirals. In Fig. Ι a screw P is shown, which can be screwed higher or lower according to the intended thickness of the thread bobbin on the bobbin. As soon as the thread winding body, which is gradually being wound up, has reached the correct thickness, it begins to touch the surface of the screw head P , and the apparatus comes to a standstill as a result of this braking, since the machine flywheel will push the apparatus drive wheel k off sufficiently to notify it of any more movement. Patent claim: One, different for ship sinks Length adjustable apparatus for thread spools for sewing machine ships, by means of alternately to the right and left acting screw line guide of the thread, happen this by a helix or by two helical lines acting in the opposite sense, and let the helical line be rigid or one that can be regulated for the different thread thicknesses, whether the reverse movement the thread guide is done by hand or automatically. For this purpose I sheet drawings.