US3578969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid sample inlet system for a mass spectrometer
Assignee: Electronic Associates Inc
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Filing: 1968-11-25
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Granted: 1971-05-18
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Expires: 1988-11-25
Abstract
Abstract A system is disclosed for injecting solid material into an evacuated chamber without disturbing the pressure therein. Two rods are slidably mounted for extension into the chamber via sealed apertures at opposite ends thereof. A larger diameter rod may extend through the chamber and out the opposite ends. A smaller diameter rod carrying the solid material is interfit within the larger diameter rod. The larger rod is withdrawn as the smaller one is inserted.
Inventors
- 👤 Walter Proskauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:23
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/04; H01J49/0459; H01J49/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
A system for injecting solid material in an evacuated chamber without disturbing the vacuum conditions therein, comprising a chamber having at least two apertures aligned on opposite sides thereof, support means affixed over each of said apertures, said support means having two orifices of different respective diameters formed therein, pressure sealing means mounted wIthin the larger diameter orifice, said sealing means having an aperture therein aligned with the smaller diameter orifice, a first hollow elongated member mounted on a first of said support means for movement within said orifice and said sealing means said member being of sufficient length to pass through both said apertures, a second elongated member having a cup portion for carrying solid material and capable of interfitting within said first member mounted on the other of said support means for movement within said orifice and said sealing means so that when said first member traverses both apertures, said second member may be inserted into said first member and, thereby inserted into said chamber as said first member is withdrawn.
Claim 2
Dependent Claim
50 words
The system of claim 2 wherein said sealing means includes first and second glands separated by a spool, said spool providing a space between said sealing means and said larger diameter orifice, whereby said sealing means can be maintained at a desired relative pressure to the pressure within said chamber.
Claim 3
Dependent Claim
46 words
The system of claim 2 wherein said first elongated member is affixed to said support to prevent accidental withdrawal of said member from said chamber, and said second elongated member is limited for slidable movement within said chamber so that said cup is properly located therein.
Claim 4
Dependent Claim
28 words
The system of claim 2 wherein said second elongated member includes a heating element for said cup portion whereby said material may be brought to a desired temperature.
Claim 5
Dependent Claim
176 words
In a quadrupole mass analyzer having an ionizer, a filter section and an ion detector, a system for injecting solid samples therein comprising, an ionizer including a chamber and means to generate an electron beam and to focus an ion beam, first and second aligned apertures on said chamber. orificed sealing and support means affixed to said chamber, over each of said apertures, a first hollow elongated member capable of extending within both said first and second apertures and slidably mounted in one of said orificed means, a second elongated member having a sample cup formed in one portion thereof and a heater for said cup, slidably mounted in the other of said orificed means, said heater and cup portion being capable of interfitting within said hollow first member, whereby said cup may be inserted into said chamber as said first member is withdrawn, and solid material in said sample cup produces a molecular beam when heated, said apertures being located such that said electron beam, said molecular beam and said ion beam are mutually orthogonal.
Claim 6
Dependent Claim
68 words
The injection system of claim 6 wherein each of said sealing and support means includes a member having large and small diameter orifices therein, and a seal mounted in said large diameter orifice and including first and second gland means separated by a spool member, said spool providing a space thereby permitting said seal to be maintained at a desired pressure relative to the pressure within said chamber.
Claim 7
Dependent Claim
38 words
The inlet system of claim 6 wherein said first elongated member is affixed to said chamber to prevent accidental withdrawal therefrom and said second elongated member includes stop means ensuring accurate positioning of said cup in said chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |