DE580977C - Manufacture of springs with a spiral shape - Google Patents

Description

Manufacture of springs of spiral-like shape The invention relates to a process for the production of springs of a spiral-like shape, with which smooth Straps or wires made of hardened steel or of other materials with similar elasticity Properties can be reworked into feathers without affecting the elastic properties these materials are lost. Such springs are particularly suitable for use suitable in blinds and the like.

Blinds that can be rolled up automatically or not can be completely stable by using such springs without a groove guide be made.

With the help of the new springs you can also make sliding windows on the simplest Kind of balancing and board blinds that were previously only available with belt devices was able to operate clumsily, so that she could be operated like a patent rouleau are.

In the drawings, the subject matter of the invention is shown in some exemplary embodiments, namely: Fig. I a smooth steel strip on which a deformation is drawn, as is brought about by the connection with a tendon, Fig.z two tendons with riveted and deformed steel tape , Fig. 3 a partially extended spring according to the invention with schematically indicated tendons, Fig. Q., 5 and 6 different designs of tendons, Fig. 7 and 8 a children's playpen, Fig.9 a view of a self-stable blind, Fig. Io a Section through the blind according to Fig. 9, Fig. Ii a self-stable blind drawn in section with gaps for ventilation, Fig. 1a a sliding window with automatic balancing, Fig. 13 an arrangement of a self-stable blind in a car as an anti-theft device, Fig. 1q . a small board blind with automatic balancing, Fig. 15 a spring for blinds in a special design for the purpose of special reinforcement. To produce a spring according to the invention (Figs. I to 6), trough-like tendons c are used, which are lined up one behind the other in the deepest point of their troughs b with the steel band or wire (Fig. A). When the spring is extended in the direction of the arrow (Fig. 3), the fastening of the steel band in the trough b and the shape of the tendons c create tension in the spring. The spring tension acts as a rolling force (see round arrow ca) or, if the spring is fixed in w and can be rolled up in x , as a tensile force in the direction of the arrow z. These forces can be increased by attaching several steel strips or wires one above the other (Fig. 15) or next to one another to the deformation bodies c. The tendons, which are connected to the steel strip, can be louvre rods or links made of stamped sheet metal or bent from wire. So shows z. B. Fig. 5 shows a rod with a hollow section, in which the steel band can be pushed into the hollow section (Fig. A), just as the steel band is screwed onto trough-like tendons (Fig. Q.), A punched sheet metal for pulling in the steel band (Fig. 6), a stamped sheet metal with a bracket e for pressing the steel strip into the trough.

The children's playpen (Fig. 7 and 8) forms a round shape by itself and, when the butt joint is released at f, rolls up automatically. One such Playpen decreases in comparison with the previously known square playpen im rolled up states take up significantly less space. - Such a self-acting one The rolling up playpen cannot be produced with the previously known types of blinds. In order to give an ordinary blind the same tension, one would have to use a very Choose a strong steel band, but do not roll it up appropriately were. Instead of curling up on its own, it would stretch out in a straight line.

In the example Fig.7 and 8 it was shown how a blind is stabilized by one-sided tensioning force with a simple spring according to the invention. In the following, the effect of two springs against each other is shown, which leads to the complete rigidity of a blind without a groove guide. The springs k and k1 (Dep. 9, 1o and ii) are firmly connected to the strong rail i at j and are stored so that they can be rolled up at points m. The points in are arranged so that the blind can easily roll up. The roll-up force and the tension force of the two springs k and k1 directed against each other in the direction of the arrow as well as the interlocking of the blind rods 1, which are alternately attached to the two springs k and k1, result in an absolute rigidity of the blind surface, which can be achieved by attaching further, laterally arranged springs st can be reinforced. The blind surface is rigid as soon as the drawn-down blind is held by a catch or a lock at o (Fig. 9) or p (Fig. 13). When unlocking again at o or p, the blinds snap back into their rolled-up shape as a result of the rolling force.

With the help of this self-stable blind, which is full and also latticed can be made, it has become possible to create space-saving door and window blinds to construct and in any position self-rolling panels in each Making form for all sorts of purposes. So shows z. B. Fig. 13 a device to prevent car theft. The device that consists of a self-stable There is blinds, can be attached in r when the car is open and in s when the car is closed will. By touching a handle you can stretch the blind and have it at the same time the view to the front is blocked and access to the driver's seat is locked. Without having to lock anything, the car is secured against theft. You only need a key when the car is ready to drive again shall be. Such a device with the help of previously known blinds too create is not possible because a groove guide cannot be attached to the front of the carriage is.

Another use of a self-stable blind is shown in Fig. I i in use, for example, for cabin windows on ships. Especially on ships often makes it difficult to fit prescribed wooden blinds due to lack of space To attach frame. The louvre rods L in Fig. I i are so alternately on attached to the two feathers so that the air can strike them through. For this too There is no need for a groove guide.

Fig. 1a shows a. Sliding window with springs according to the invention, which in t. stored firmly and rolled up in v on the rising and falling window and serve as balancing means for the sliding window.

A board blind according to Fig. 1q., Which previously only had a pulling device was difficult to handle, is like a patent roll in an embodiment according to the invention easy to use.

The springs according to the invention can not only be produced in any desired strength, but you can also lay several steel strips of different lengths on top of one another as shown in Fig. 15 in order to achieve greater overall strength.

Springs according to the invention are so versatile that with the above description only a few examples could be explained. In particular The use of these springs means a step forward in the manufacture of blinds.

Claims (1)

PATENT CLAIM: Process for the production of springs similar to coils Shape, characterized in that straight strips or wires made of hardened steel or of other materials with similar elastic properties with a plurality of lined up Tendons (c) are firmly connected, those with hollows (b), pressed-in depressions (Fig. ¢ and 6) or incised arcuate slots (Fig. 5) are provided and that the connection is made by riveting (Fig. A) in the troughs or depressions or by wedging in the slots or the like. Like. Takes place in such a way that a deformation of the at each individual connection point Ribbons or the wire is brought about and the sum of the individual deformations gives the wire or ribbon a spiral-like shape.