DE212399C - - Google Patents

Description

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IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- JVl 212399 CLASS 33 «. GROUP

ERICH SCHUMACHER in AACHEN.

Umbrella stick spring. Patented in the German Empire on May 26, 1908.

Umbrella stick springs have so far been bent over at the end that goes down into the stick, .and pushes this bent end against a cross pin driven into the stick to avoid the spring coming out of the stick.

The insertion of the cross pin is difficult and can only be carried out by skilled workers will. Furthermore, the bent end of the spring requires the execution of an elongated hole in the stick, which only with expensive special drills can be drilled with great expenditure of time.

Many attempts have been made to avoid the transverse pin and the elongated hole, z. B. by upsetting a head at the end of the spring. Then a round hole drilled through, one with a small, round one after inserting the spring Hole-provided capsule is narrowed at the upper edge.

Furthermore, the spring end is simply shortened to avoid the elongated hole and the Keep the cross pin with the round hole.

In all cases, however, the arrangement has so far required such a careful assembly that the advantage is thereby canceled again. The round hole must be as small as possible, because otherwise the stick will be weakened too much.

The small hole, which is narrowed at the top or by the cross pin, leaves almost no room for the spring, so that even with the slightest shift, as is unavoidable during assembly, against the wall of the hole or against the narrowing of the edge or the pin is pressed and, as a result of the friction, the suspension inhibits. ■

■ In the new, this invention related spring, the cross pin is through one in the Replaced the stop lying lengthways of the stick.

If the part of the spring, which descends in the known manner and is designed as a hook, eye or slot a , or the end of the spring which serves as a stop bridge, is arranged transversely to the axis of the stick, in contrast to the known designs, the stop can take the form of a clamp or a hook whose back or leg b, lying in the longitudinal direction of the stick c, is passed through the slot or the eye α .

The round hole d now only needs a diameter that is slightly larger than the width of the spring, and yet it gives the spring sufficient leeway in the longitudinal direction of the stick, because there is no constriction by the pin, etc. whatsoever. .

Smaller shifts in the attachment of the spring therefore do not call for any significant Disturbances emerge, the assembly is thus due to this and also by simply driving in the stop in place of the cross pin is much easier.

The shapes of the spring and the stop can be different. On the drawing are z. B. shown two types of embodiment; but it would lead too far, all of that To illustrate inventive concepts related embodiments.

Claims (1)

Patent claim:
Umbrella stick spring with a slot or eye for the stop located at the free end entering the stick recess, characterized in that the stop lies in the longitudinal direction of the stick. For this purpose ι sheet of drawings. Berlin, printed in the Reichsdruckerei.