DE1073114B - Process for the production of tension grids for electrical discharge vessels whose frames consist of spars and cross struts - Google Patents

Description

GERMAN

The invention relates to a method of manufacture of tension grids for electrical discharge vessels, the frames of which consist of spars and cross struts, in which the lattice wires are continuously wound onto the rotating lattice bars, then by cutting the lattice bars the lattice are obtained.

It is known to produce such grids by placing a wire over rotating bars wound under tension, produced a winding gap at periodic intervals and then so-called cross braces are welded or soldered between the spars. Afterward the individual grids are obtained by separating the bars. Furthermore, arrangements are for Winding normal winding grid described in which each grid turn in a notch of the grid spar is set or each turn is individually welded to the grid wire.

Furthermore, a method for the production of tension grids for electron tubes has become known, in which the tensioning grids are each wound from a pair of longitudinal spars with pre-tensioned tension Lattice windings and each a pair of metallic transverse bands exist and in which the first and the last lattice turn each for itself with a cross band together on a longitudinal spar by spot welding or soldering.

In contrast, in a method for producing tension grids for electrical discharge vessels, the frames of which consist of spars and cross struts, in which the grid wires are continuously wound onto the rotating grid bars, then the cross struts are attached and finally the grids are obtained by separating the grid bars, according to the invention interrupting the rotation of the rail bars according to the lattice lengths corresponding winding periods to simultaneously respectively to two different gratings associated two transverse struts which are shaped at their ends so that they are for the purpose a & r determining the distance of the bars as bearings for the rail bars, on each To attach the flat side of the lattice strand and then to hold the two related cross struts in place by at least one clamping device, furthermore, after winding the entire length of the lattice bars, the cross braces and the lattice wires are connected to the lattice bars by soldering, and after Removing the clamping device, the bars are separated between the corresponding cross struts.

This method has the advantage that production is particularly efficient. In particular, that falls time-consuming individual welding or soldering of the cross braces with the spars. This process Method of manufacture

of tension grids

for electrical discharge vessels,

their frame made of spars

and cross braces exist

Applicant:

Standard electrical system Lorenz

Corporation,

Stuttgart-Zuffenhausen,

Hellmuth-Hirth-Str. 42

Dipl.-Ing. Albert Lieb, Stuttgart-Bad Cannstatt,
has been named as the inventor

is carried out once on the changing bar. In addition, there is still the advantage that By eliminating the individual welding process, a greater manufacturing accuracy of the grid frame achieved can be. Twists in the frame, which occur during subsequent welding or soldering the cross struts must necessarily take place are switched off. In that the cross strut is a counter bearing has, there is also the advantage that the cross strut up to the limit of its mechanical Strength can be loaded to pressure. If the cross brace is only soldered in the previously known manner or welded, the resilience can only be taken as far as the strength of the Soldering or welding point allows.

The invention will be explained in more detail with reference to the exemplary embodiments in the drawings.

Fig. 1 shows a cross section of the grating wound with the arrangement of Fig. 2 with a clamping device; in

Fig. 2 is a plan view of an arrangement for carrying out the method in schematic form reproduced.

Two spars 1 are with the help of the rotating pulling device 10 shown schematically from the rotating jig 11 pulled out steadily. The grid wire 4 lies over the bars 1. When producing a tensioning grid, the wire 4 is guided via a wire guide device 6 and a braking device 7 from the wire supply reel 5

909 709t / 381

unrolled and placed on the stiles under mechanical tension. The movement of the pulling device 10 as well as the rotation of the lattice bars is periodically interrupted according to the desired lattice length. In this case, the end and. the, beginning of successive lattice lengths like this placed that the beginning and end of the slide device 8 and 9 face one another. With the help of Slider 9, four cross struts 2 'are placed on the bars. The slide 9 is designed so that he automatically ensures the respective subsequent delivery of the required cross struts. To ensure"," that "the" cross strives remain in this position are subsequently made with the aid of the slide device 8 and 9 four clamping devices pushed over the ends of the cross struts 2. Also the Slider device 8 is designed so that it automatically the respectively required clamping device 3 provides. The slide devices 8 and 9 work according to one of the known ones and therefore not detailed procedure. After completion of the winding bar (length of several meters) The required soldering of the bars and cross braces of the entire angle bar was carried out in a furnace. The metal required for the soldering process can be placed on the cross brace beforehand Wire or the spar, e.g. B. by electrolytic precipitation or fire metallization applied be. Gold is particularly suitable as a solder. Simultaneously with the soldering of the spars with the Cross braces are also expediently soldered to the lattice wires with the spars. After this the winding bar is taken out of the soldering furnace, are separated by separating, e.g. B. grinding, cutting, or by some other known method between the respective cross braces the individual Preserved grid.

The cross strut 2 is designed in the present embodiment so that the distance between the two spars is determined by the indentation la. In this case, the soldering only has the task of connecting the cross brace to the spar. The tensile stress on the cross brace caused by the wires is not affected by. the soldering, but added by the cross brace.

A somewhat modified type of clamping device and the cross strut is shown in FIG. 3. In this exemplary embodiment, a rounding is worked out from the cross strut 2 which nestles against the spars. The preliminary fixing of the cross brace to the spars can be done, for example, by means of a tensioning device 3. This clamping device consists of two pliers-like parts 3 a and 3 b, which press the cross strut onto the spar via the axis 13 and the spring 14.

Claims (6)

:. :. "Claims: 1. Process for the production of tension grids for electrical discharge vessels, their frames consist of spars and cross struts, in which on the rotating lattice bars continuously the Lattice wires wound up, then the cross braces attached and finally by separating the Lattice spars the grids are obtained, characterized in that the rotation of the lattice spars after the grid lengths corresponding winding periods is interrupted to simultaneously the Two cross struts belonging to two different grids, each shaped like this at their ends are that they are for the purpose of determining the spacing of the. Spars as bearings for the lattice spars serve to attach to each flat side of the lattice strand and then the two that belong together To hold cross struts in place by at least one clamping device that after winding the entire length of the lattice bars, the cross struts and the lattice wires by soldering be connected to the lattice frames and that after removal of the clamping device, the bars between the corresponding cross struts be separated. 2. The method according to claim 1, characterized in that the clamping devices are perpendicular be placed on the cross struts to the lattice bars. 3. The method according to claim 1, characterized in that between the individual grids Jump distance is left. 4. The method according to claim 3, characterized in that the cross struts directly on the Bars and not placed on the wire. 5. The method according to claim 1, characterized in that the solder on the grid wire, is attached to the cross braces or on the bars. 6. The method according to claim 5, characterized in that that gold is used as solder. Considered publications:
German Patent No. 539 569; : - German interpretation document S 29632VIIIc / 21g. (announced on June 21, 1956) j
". British Patent No. 675,344. 1 sheet of drawings © 909 709/381 1.60