DE456701C - Wire springs, especially for mattresses - Google Patents

Description

The 'invention refers to one from ^! A wire spring consisting of an upper, widely wound part and a lower part, tightly wound, especially for mattresses, which is supported at the transition point between the two parts! and in which the two parts are connected by a center piece, so that the spring is under pressure in its upper part and in its; the lower part is subjected to tensile stress. Such springs are used for mattresses and the like.

According to the invention, the spring wire is connected in order to form the central support led up to the tightly wound part in the middle of the spring, here forms a j Loop and is connected to the j uppermost turn by transverse arms, where i the eyelet a stiffening wire can be inserted, the ends of which around the turn are lying around.

The drawing shows an embodiment of the invention on a mattress, namely shows

Fig. Ι a cross section through a mattress,

Fig. 2 is a plan view or a plan,

Fig. 3 is a longitudinal section, while Fig. 4 to 8 are individual parts. The frame of the mattress is formed by the longitudinal strips β and the transverse strips b. The bolts c are screwed into the strips, which are in rings? leak. The individual rings e that are not on the edge are connected to one another and to the rings d by wires / and thus form a network-like structure. The ; Wires / engage in bulges of rings e \ and d . The spring forming the subject of the invention consists of the conical, tightly wound part h and the likewise conical, widely wound parti. A constriction k serves to support the springs in the rings β and d. The wire end A ^{1 of} the j tightly wound part A is through the middle: the spring is pulled up, forms a loop L at the top and then goes with part A ² < to the outer, widely wound part I and then with part A ³ across the top "Winding i ¹ away and is then bent over (Fig. 4 and 5). To make shifting" impossible, a wire m is put through the loop /, which also goes across the topmost winding i ¹ and then with its ends m ^{1 is} bent. The free end ο of the widely wound part of the spring is attached, as shown in Fig. 6 and 7. A closed link connects the end σ with the last turn of the widely wound part. A so-called wall chain runs between every two rows of springs /? from one longitudinal strip a to the opposite one and is fastened at both ends by eyelets in the wood. Between the springs, the chain and the Längsbzw. Cross bars are laid at the level of the last large turn of connecting wires, namely double connecting wires q in the longitudinal and transverse directions and single connecting wires r in the oblique directions.

Claims (3)

Patent claims: ι. A wire spring consisting of an upper, widely wound and a lower, tightly wound part, especially for mattresses, which is supported at the transition point between the two parts and in which both parts are connected by a central support, so that the spring is under pressure in its upper part and in its lower part Part of the tension is claimed, characterized in that, for the purpose of forming the central support (A ¹ ), the wire end of the tightly wound spring part (A) is guided upwards in the middle of the spring, here forms a loop (/) and is supported by transverse arms (A ² , A ³ , A ⁴ ) is connected to the topmost turn (i ¹ ) . 2. Wire spring according to claim 1, characterized in that a stiffening wire (m) is inserted through the eyelet (/), the ends of which are placed around the topmost turn (i ¹ ). 3. Wire spring according to claim 1 and 2, characterized in that the turns of the spring at the central bearing point have a constriction (k) with which they rest on rings [e and d) when installed in a mattress, which are known per se Way are connected to each other with the frame by hook wires. 1 sheet of drawings.