DE69765C - Process for the production of loop springs from wire - Google Patents

Description

IMPERIAL

PATENT OFFICE.

Two, three and fourfold flat wire springs are manufactured according to the extended process, as well as those that are rolled on the high edge, creating a more even edge is achieved. Fig. 1 and 2 show fourfold flat wire springs, Fig. 3 one on the high edge rolled double wire flat spring and FIG. 4 the arrangement of the flat and cantilever rollers.

To produce the triple flat wire spring, two wires are attached to a mandrel in same direction, then a wire on a smaller mandrel in the opposite direction coiled to the turns of the two wires. After removing both wraps, d. i. the double wire and the single wire, the same are pushed axially into each other and the coils stuck into each other, as in the main patent, pressed flat. Through this a much fuller flat spring is obtained than in the process of the main patent; however, it has all the properties of those manufactured according to patent no. 60478 for the rest Feather.

To produce the fourfold flat wire spring shown in FIG. 1, two wires are used wrapped around a mandrel next to each other in one direction, then over the same mandrel and the first winding two other wires wound in opposite directions and after the two double wraps have been pulled off, the double wraps that hang one inside the other Spirals pressed flat. Instead of wrapping the wires over the same mandrel, each could Pair are also wound on a special mandrel, whereupon both pairs spirals, as previously stated, axially into one another can be pushed and pressed flat.

The fourfold flat wire spring has a more uniform and fuller appearance; she is in the middle somewhat thicker and appears very weakly lenticular in cross-section. while the edge is more regular than with the other flat wire springs.

Fig. 2 also illustrates a quadruple wire flat or double loop spring whose Manufacturing consists in doubling the process of the main patent. It will namely, first a wire wound in one direction, then a second wire over it in the opposite direction, over this a third wire like the first wire and over the third wire a fourth according to the direction of the second wire. This quadruple spiral is pressed flat like the others after it has been stripped from the mandrel, whereby one of The flat spring, which is different from the previous one, is obtained in the middle, widthwise three loops appearing like longitudinal ribs arise, which form the spring give a full and firm appearance.

The edges of the feathers are more or less jagged or wavy, namely with the double springs, less with the

Claims (3)

from three and even less from the spirals wound from four wires. In order to obtain the smoothest possible side edges, the spirals should run simultaneously through a rolling mill A , Fig. 4, which presses them flat, and immediately behind it through a pair of rollers B at right angles to the first rolling mill, which slightly compresses the spirals on the vertical edges. The loops are pressed a little longer and get a more elliptical shape; the edges become straighter, as the short bow arcs of one feather fill the incisions formed by the crossing of the large arcs of the other; the loop spring produced in this way becomes fuller at the edges, as can also be seen from FIG. Patent claims: i. Process of the type protected by patent no. 60478 for the manufacture of Loop springs made of wire, characterized in that for the production of three or more fourfold flat wire springs instead of the spiral winding that takes place over a mandrel in the opposite direction two wires: either two wires in the same direction and across the same one wire respectively. Two wires in opposite directions, or three respectively. four wires are wound onto the mandrel in alternating directions. 2. Procedure of the type protected under 1., modified so that two wires in wound in the same direction over a mandrel and a wire in the opposite direction over a second mandrel are, whereupon after stripping the spirals the same are axially inserted into each other. 3. Process of the main patent, as well as the above under .1. and 2nd protected Art, characterized in that the flat springs pressed flat by means of rollers and firmly pressed together during or are rolled on edge at the same time immediately after this flat rolling, for the purpose of forming a less strongly serrated edge. 1 sheet of drawings.