DE629848C - Process for the production of electron tubes - Google Patents

Description

The invention relates to an electron tube, in particular for ultra-short waves, and a Process for making such tubes. The highest frequency at the usual tubes can still work is essentially determined by the electrode capacity and the capacitance and inductance of the leads. Inductance and capacitance of these Elements form an oscillation circuit, the frequency of which represents the upper limit of the operating frequency of the tube. One has You can move this limit upwards by making the electrodes small and short made and led out the supply lines on different sides. But these tubes are difficult and expensive to manufacture because they have special designs and methods for the Require assembly.

The subject of the invention is an economical manufacturing process for tubes, whose supply lines have smaller capacitance and inductance than Usual types and their dimensions can be chosen as small as they were after the previous ones Procedure would not be achievable. The very small tubes can also be manufactured economically.

Fig. Ι shows a tube according to the invention, partly in view, partly in section; Fig. 2 shows the individual parts of such a tube before assembly, exploded;

Fig. 3, 4 and 5 show modifications of certain parts.

In Fig. Ι the piston encloses and carries an electrode system consisting of a indirectly heated cathode 11, a grid 12 and a box anode 13. The anode has top and bottom lugs 14 to which mica washers 15 and r6 are attached, and although these approaches are bent over the mica disk and grip preferably into cutouts on the edge of this disc.

The finished piston has an outer pinch ring 18 through which stiff wires 17, which serve as feed and support wires for the electrode system, go through. At lines 19 are soldered on the inside of these wires and open through at one end gen 20 of the mica disk 15 are inserted through (see. Particularly Fig. 4) and the Attach wires 17 to the mica washer. On the other end of the line, they're with one the one arranged between the disks 15 and 16 Electrodes electrically connected. The outer ends of the wires 17 serve as Tube contacts that are in a correspondingly

Claims (4)

structured version will be introduced. This construction eliminates the need for a conventional pinch foot and reduces the overall dimensions of the tube. Note that the grid and anode supply lines are on the other side of the bulb <$ §t * the heating and cathode supply lines, which is reduced by the capacitance and inductance of the supply lines. A grid 21 is attached to a lower attachment 14 of the anode on the side facing away from the electrode system. In the embodiment according to Fig. 3, the lines 19 are first through the Mica disk 15 threaded through and near the periphery, at 22, on the Disk attached while its other ends are electrically connected to the electrodes will; then the feed lines 17 are attached and with the lines 19 welded, namely the lines 17 are arranged so that the mica washer between the inner ends of these lines 17 and the ends of the lines 19 is clamped. In the embodiment according to Fig. 5, the leadthrough conductor 25 is designed as a flat strip, which is welded at its inner end to the electrode line 19 so that its flat side touches the GUmmerscheibe and which passes through the crimp ring in a plane parallel to the mica washer. At its outer end 26 of the strip is twisted by 90 ^{is 0,} so as to form a blade contact, which can be easily inserted into a corresponding socket. The assembly of such a tube is expediently carried out according to Fig. 2. After the electrodes with the mica washers 15 and 16 have been assembled to form a closed unit, the wires 17 are attached to the mica washer 15 and connected to the electrodes by the lines 19. The outer ends of the wires 17 are attached to a ring 30 which holds them in place during assembly. However, the lines 17 can first be connected to the ring 30 and only then attached to the mica disk ι s. The whole is then inserted in such a way that the electrode structure protrudes downward into the cup-shaped part 31 of the KoI-Jpen and the supply lines | p | if a flange 32 rest. Then a second cup-shaped part with a flange 34 is placed over ψ $ & ι lines in such a way that me two flanges 32 and 34 lie one above the other. The flanges are heated until the lines melt into them and, if necessary, pressed together with a punch, so that finally a flange according to FIG. 1 results with the protruding lines 17. . Sponsorship claims: '. i. Process for the production of electron tubes, especially for ultra-short waves, characterized in that initially the electrode system (11, 12, 13) by means of insulating washers (15, 16) arranged on both sides to form a cohesive one Unit is combined that then radially to the electrode connections (19) outwardly directed, serving as supply and support wires for the electrode system, stiff wires (17) are attached and attached to the upper insulating washer, that then this structure is hung in one half of the glass bulb and the upper half is placed on it and fused to the lower half to form a pinch ring (18) through which the stiff wires (17) go out. 2. The method according to claim 1, characterized in that for holding the holding struts (17) a wire ring (30) is used during assembly 9 ″, the removed after the tube is made. 3. Tube according to claim 1 or 2, characterized in that the outer Ends of the leading out rigid retaining struts are designed as contact pins. 4. Tube according to claim 3, characterized in that the holding struts (17) have a flat cross-section and protrude from the piston Ends are twisted 90 ° against the inner ends. For this purpose ι sheet of drawings