DE1944518U - MEASURING CELL FOR LOW ABSOLUTE PRESSURE WITH A METAL DIAPHRAGM. - Google Patents

Description

Measuring cell for low absolute pressures with a "'; ..

Metal membrane - ~ ^: · ■ _: '. / '- \\ ■'. "■ '■■■ _ ■

In the known Heßzellen for low absolute pressures, "a metal diaphragm with the edge of the transducer is welded ei-ner the membrane · outline simulating surface" The membrane is, on one side .with connected _■;.. And closes on the other side a ¹ evacuated 'space. The pressure in this space / serves as a reference "' ■■■ '.' ■ ' pressure, while the other membrane surface; exposed to the pressure to be measured. In the event of overload, i.e. "when the pressure to be measured""exceeds" the measuring range, the membrane rests in the contours of the surface

PA 9/510/2073 ^r 4.1.66 / Gra / Rid,

■ PA 9/510/2073 -. 2 - "'...; _ - _-' \ '■■' :..

its back (membrane bed) and is on this.; Supported so that it cannot be damaged. "The space behind. The membrane" is in. . the known measuring cells with a connection piece - ^; to connect a connection for a vacuum pump 'provided «With the help of the pump, the room is evacuated. -; kuiert and the 'nozzle hermetically sealed': '. .

The evacuation should take place according to the present firing.

'' saved with a special connection piece ■ /: "According to the hiring, this is achieved by that a cover closing off the evacuated space is welded on in a vacuum with the electron beam / The measuring cell is assembled and ready for. ". Finally the lid welded on. "The space behind the

. As a result, the membrane is after completion of the welding process evacuated »::. . "■" ■ '■ ■ ■: -.

A measuring cell constructed according to the,! Inflation will be explained in more detail with reference to the drawing. A : . "flange-shaped body 1 is worked out on one end face corresponding to the membrane contour.; .- The membrane 2 is" at the edge on an annular; Surface 9 welded on and-in the middle with 'the. ·; "_; Washer 3 welded .. On this iot a coupling ^:

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ΡΛ 9/510/2073 ^. - 3 _{.-:::; ;} \ Y ;; _{-:; :} . ■■■. y _; : "

ventilation device 8 attached, wplche.the membrane ■ '; with the not ^ shown balance beam / a measuring ......

Converter connects. The low level to be measured _: ----.

■ solutdruck- acts on the outer surface of the metal; ; membrane 2. The disk _v -3 is via connection ^ -. ; parts 6 connected to an annular spring 5 ,; ■ the one on the back, of the flange '.1'. attached _is _o ■ This spring is used to guide the membrane in a straight line./ The space behind the membrane is 'closed off by the cover 7 '. This cover is aufgesehweißt on hand 10 in vacuum \ with the electron "The welding operation" is performed at the end, so that evacuated-of took Eaum behind .the membrane without special additional M3ß ~ - ^°;.. "; ^λ ί

1 right to protection ^v . . '. V ₁ . _'■::: - 1 BI. Drawings . -. ;.; ">'■: ■ -..- ■■" ■ .:.

Claims (1)

■ '■■■■■ P.A.023 01HU66 PA 9/510/2073. ■ - A- .: ';.' ■■,: SQ hat ζ an Spruche ' , ""' ■ ". '■ Measuring cell for low "absolute pressures", with a metal membrane which, when there is excess pressure, supports itself against a surface (membrane bed) which simulates the membrane contour and which closes off one end of an evacuated space ₉ . characterized in that the evacuated area "at the other end closing Beckel is welded in a vacuum with the electron beam..:." : ';