DE1870254U - DEVICE ON FINE CONTROL VALVES OR LEAK VALVES, IN PARTICULAR FOR CONTROLLING VERY SMALL GAS QUANTITIES FOR SPECTROMETERS. - Google Patents

Description

PATENT ADVOCATE

DIPL-ING. ERICH SCHUBERT

Abs .: Patent attorney Dip! .-! Ng. SCHUBERT, 59 Siegen (Westphalia), P.O. Box 325 Oranienstrasse 14

62 114 Ke / schö U 3414 / / 47g Gm United Kingdom Atomic Energy Authority

108821 * 15.

^y ii

Telephone: 22802 Telegram address: Patschub, Siegen

Postal check accounts: i ^ ° \ ff

Cologne 106931, Essen 20362 Bank accounts:

Deutsche Bank AG., Siegen and Oberhausen branches (RhId.)

February 14, 1963

Device on fine control or Leak valves, especially for regulating very small amounts of gas for Spectrometer.

The hiring refers to fine control or leakage valves, i.e. valves which are used to regulate extremely small gas flow rates or quantities, e.g. of the order of magnitude of 0.01 / li / sec., can be used.

Leak valves are found in the field of gas isotope analysis one possible application by means of mass spectrometers. In this form of application, the leakage valves are used to regulate the inflow or conveyance of gas to be analyzed

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shaped samples after the ion sources of the mass spectrometer used.

A corner valve according to the invention has a base plate, a tube for gas flow having a thin-walled portion with a fine bore which is supported by the plate and a pushing or squeezing member disposed from the plate v \ reg and for controlled compression of the thin-walled section within the elastic limit of the Eö-hre serves to increase the cross-sectional area of the bore change.

The hiring is now based on them for example reproducing drawing explained in more detail, namely shows:

Hg. 1 a partial longitudinal section, while Fig. 2 is a plan view.

The drawing shows a leak valve with a base plate 1, one of which is an integral holding arm 2 protrudes upwards, a MickeIröhre 3 for the gas flow, the has a thin-walled, fine-bore portion 4 supported by the arm 2 of the plate and an abutment member 5, which is arranged away from the plate 1, for the controlled compression of the section 4 within the

elastic limit of the tube 3 to the cross-sectional area to modify the hole.

The arm 2 forms a support bracket in contact with each other with one side of section 4 of tube 3.

The plate 1 has upstanding side walls 6, 7 of the same height as the arm 2, and the component 5, which is of generally circular cross-section, has a housing 8 attached to the walls 6,7. line plate 9, through which the component 5 passes, is to the upper End of the housing 8 welded. The plate 9 has two upstanding side walls (one of which is shown and denoted by 10), to which a cover plate 11 is fastened by means of screws 12. Rotatable between the Plates 9, 11 is a gear 13 with an internal thread 14, which meshes with an external thread 15 at the upper end of the component. Am block 16 attached to plate 9 by means of screws

17 is attached, forms a housing for a worm wheel 18, de.s with the gear 13 meshes. The worm wheel

18 is keyed to a shaft 19 ^{which is rotatably mounted in the - 0} IoCk 16 and has an actuating wheel 20.

A screw 21 leads through the housing 8 and into a longitudinal slot 22 which is provided in the component 5. The component

- A _

5 has an integral flange 23 at its lower end with a thrust or pinched bead 24. Bndkupplungsteile 25 _} 26 provided with splashing are welded to the tube 3 and fastened to the plate 1 by screws 27.

By rotating the worm wheel 18 in the appropriate direction, the component 5 is moved downwards in the housing 8, if the block 24 engages the section 4 on the side opposite the arm 2 and compresses the section 4 of the tube 3, around the cross-sectional area of the bore and thus the flow rate of a gas flowing through the tube 3 to change. The controlled compression of the section 4 within the elastic limit of the tube 3 is allows the y-valve to be set to a particular flow rate and subsequently to other flow rates as desired can be.

When the leak valve is used to control the flow of gaseous samples to a mass spectrometer ion source, the coupling component 25 is coupled to the gas source and the coupling component 26 & n is coupled to the sample inlet tube of the ion source.

For a Uickelrö-hre 3 with a section 4 of 0.1 inches (2.54 mm) outside diameter and a wall thickness of one to

two thousandths of an inch (0.0254 to 0.08 mm) can be the Yentil to any flow rate or amount in the range of 0.01 / uJ / sec. "to lull at a pressure of 50 mm Hg on the Constriction can be regulated.

By using the tube 3 it is ensured that no amounts of trapped gas occur, and therefore will the so-called memory effects are reduced.

Protection claims

Claims (2)

PA 133 G1Q *? R 7 P 3 PATENT AGENT * "" IJJD! ~ Lϋ '^ J DIPL-ING. ERICH SCHUBERT Telephone: 22802 Telegram addr .: Patschub, Siegen Abs .: Patent attorney Dipl.-Ing. SCHUBERT, 59 Siegen (Westf.), Postfach325 Postal check accounts: Oranienstrasse 14 Kö! N m931 # Essen 203 62 Bank accounts: Deutsche Bank AG., 62 114 Ke /]? I · Siegen and Oberhausen (RhId.) Branches OITIED EIlGDOM ATOMIC. .. peoples hat ζ an Proverbs ^ 1. Steering valve with a base plate, a metal tube for a gas stream with the tube supported on the plate, and with a thrust member attached to the plate for controlled compression of the tube within its elastic limit is, characterized in that the tube has a thin-walled portion of fine bore and the thrust member so acts that the cross-sectional area of the feinan. Bore is changed, with the Y-valve especially for regulating the admitting of Gas after a mass spectrometer ion source is applicable. 2.! Angle valve according to claim 1, characterized in that the thin-walled section has a wall dioke of up to 0.08 mm.