DE1948065U - HERMETIC SEAL IN VACUUM. - Google Patents

Description

Br.-fiKr.Wi3

Frankfuri / Μαΐα-Pco & siiaß® 13th

RA. 314 996 * 16.6.

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In this way not all parts to be connected need to be brought to a temperature * at which the connections already made between other parts of the device are destroyed, since the electrical arc welding in a protective gas »eg argon ₉ creates the sound films on the interacting parts Flattening the conductor of the ferrous alloy prevents “dl © consist of an OsId” that would otherwise be the manufacture of an © inwan $ fr @ i © B. V & taÄäi <ghtiimg prevented. Ba bei der Bogemsehweißumg In Arg © » wxs ¹ ® ± n® 5rtli @ h @ Warming up of those B © rei @ h © ni @ s vaccine © rs nwä the ferrous alloy _{comes about β} dl © connected to each other -being eoäl» is @in @ s © Md! i © i & © action on other ropes of the device prevents “ ül @ are already combined after another process;

.381804 * 21.7JE

it is also ensured that ₉ dl © heat ays quickly DE® heat portion is discharged when the _e 7'irnequelle is removed, such a damaging heating of other parts of the device is particularly ¥ er Bedeutimg when the unit vacuum switch is "the contacts from more metals ,, ZOB contains ₀ MolybdL.'jakcratakte which are filled with or nickel and used in the ^r> chalterhülle ,, the ladder by a © arc welding in argon melted werdea "

As an example ^ how eixi © arc welding ia Argon is used in the manufacture of a device with a vacuum envelope * is in ligur 1 an embodiment, partially cut in the longitudinal direction, "a vacuum switch" which is constructed using an arc welding ia Argoa "are shown in the figures 2 and 3 as a different embodiment ₈ while FIG. 4 is a longitudinal section through an overvoltage spark gap in a vacuum according to the invention

Ia ligux ¹ 1 ® ± n longitudinal section dur © h a vacuum switch with a shell 1 au shalt see whose body is composed mainly of a ProaellanTbuchse, in which opposite ends co-operating electrodes embedded airtight 2 and 3 _s are forming the Eontakte of the switch ,,

2) electrodes are held at both ends of the socket 1 with collars 4 or 5, their inwardly directed flange 6 each at one end of the socket, preferably with an intermediate layer 7? Glass is sealed, which is melted in contact with the socket and the collar, so that a vacuum-tight connection is created - _o

The electrode 3 is fixedly attached within the vacuum envelope © while the electrode 2 is axially displaceable in this so that contact between the opposite end faces

P.A.38180WU. & 6

Electrodes 2 and 3 can rarely be made or interrupted? therefore the electrode 2 is on a metal bellows. 8 attached to the right end with the electrode 2 and connected to the adjacent collar 4 at its left end. Among other things, to hold the electrode 2 inside the _{shell, it is SoB 0} by brazing it with a highly conductive body, usually made of copper, ₉ to which it is _{butt fused 9,} with the right end of the bellows 8 provided with a flange between them is inserted. At the left end © the bellows is connected to the collar 4 by means of a flange 10 facing outwards. .

At the other end of the socket, the electrode 5 is held approximately ₉ as in connection with the electrode 2 _9, if one disregards _{9 the} fact that no "Swischen bellows" need to be used; this makes it easier to advertise the holding of the electrode * In this F-; 11 "the electrode is 3 2.B _e dur © h brazing with a ^ body 11 of a highly conductive metal s _o B" that the collar 5 is Kupferstumpf united ₉ in turn with ■ in conjunction "at this 2weck 11, the body has a outer face on, which forms a shoulder 12 to which a sleeve 13 provided with a face is connected "that fits on the outer face ₉ which is formed on the inner circumference of the collar 5"

The electrode 3 is also provided with a central bore H ', on which a tube 15 for. Evacuation is connected and di® is connected to the interior of the shell via a transverse hole 16 ₀

Haehdem the! Peile vacuum-tightly connected to each other "are must the compound machine to be heated ₉ while being further evacuated through the tube 15, zn to the inner parts of entrapped gases" free Therefore, it is of importance that Verbindusgen already prepared dureh the heat applied sees being adversely affected, usually mine

P.A. 381804 * 7/21/66

Temperature -won e.t about 50O ⁰ G »Due to the sequence © of the assembling of the movable contact 2 and the associated parts 8 and 9, the connection point at the closed end of the bellows can be hard-soldered ₉ without the ^rr indungea of the bellows this temperature heated v; ground of the bellows would glow ₉ in the DA® metal before a Fiillraetall (not shown in Figure 1) is introduced into the contact area, "If the check moving contact © in ά®η Sehalterkörper H ₉ 4 ₉ 20 installed are to be ₉ lcann the seal between parts ά®η '4 and S ₉ not heated without the entire porcelain ^ wxä body which contact bewegend® be hot, being still the filling of the contact surface facing the possible © out melts ". - -

In order to prevent this , according to the invention, the junction points between the bellows 8 and the collar and between the sleeve 3 and the collar 5 are produced by an electric arc in an argonation pair ₉ . -. a _s retracts, as the BogensehweiSen ± n argon is known. " Do you mean that the metal to be connected is shielded against oxidation during welding, which would otherwise result in a poor vacuum seal? equilateral the applied during welding _β local heat is distributed in the sehneil uragebende atmosphere ₉ so that already · Compounds prepared nißht naehteilig can be influenced. "

In the construction according to FIG. 1, the electrode 2 is connected by means of a threaded hole 18 to an actuating body 17, which is preferably supported by a soldered joint on the seal? The axial movement of the actuating body 17 is achieved by the fact that the body is pressed onto a flange formed on the collar 4 with the aid of an annular intermediate flange 20 which is attached to a

• Hüls.e 21 attached, which rests on the outer circumference of the body 16 “In a similar tfeis © is on the other Shd © ■ '.- ■ ..-. the device oil © electrode 3 © inea Absehlußkörper 22 connected> the screwed into the body 11 and designed iat that serving the evacuation Söhre 15 protected at the electrode 3 'and formed a Stütae for daa device v / IRAE _e

In Figure 2, another way is shown to the Slektrod® 2 from. Bellows 8 au® bear against ä @ r electrode 2 is a shoulder 23 formed 'with the right End® of the bellows 8 preferably directly aw? @ & Arc welding la argon is Yerbunden "

In a similar way, Figure 3 shows a © aad @ ra VM to support the electrode 3 and the use of a sleeve 13 su Termeiden _o In the arrangement shown in Figure 3, the shoulder 12 is shaped in such a way that it is close to the back. .-Directed flange 24 is formed _s on the outer circumference of the collar 5 directly connected by arc welding with argon lato

In Pigur 4 is a t ^ berspannungsentladunesstrecke in Takuum au sehea _e Deresi electrodes do not need to be mutually movable su? the bellows 8 is therefore superfluous. In a similar way, electrodes 2 and 3 can be taken from a planar body 25 ^; which is fastened with its edge to a collar 26 which in turn is hermetically connected to the rosellan shell 1 by means of a Forseiian-glass-metal melting point. Me LABEL FOR with flange body 25 and the collar 26 feestehen ■ all of the aforementioned iron-containing alloy ,, while the electrodes are sweekmäßig copper jDichtungea 28 and _29: between the ferrous alloy and the copper accordingly «· are talking by one Bogensohweißung in argon formed "as swisohen even with seals 3d AEEN body 25 and the collar .the Pail is" Vereiniguacestellen zrvisohen the collar 26 and the casing body dim aind coming against the action of radiation or * Spritsessip from the electrodes, characterized protected "in that The sohütsend® Seliultera 51 forms the inside of the body 1 »filler metal 32 is in the end face of the two electrodes

Claims (1)

RAJH §§6 * tS A 19 961/21 ©
Associated Eleetrieal 15 " June 1966 3426 is. SS «standing «E # Wve at the usual prices , where-