US3244876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass spectrometric apparatus having a detector comprising two hall effect devices connected in tandem
Assignee: Hitachi Ltd
•
Filing: 1963-08-23
•
Granted: 1966-04-05
•
Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 Kanda Yozo
- 👤 Tauchi Shoji
- 👤 Morito Nozomu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:35
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A MASS SPECTROMETRIC OR LIKE APPARATUS HAVING A MAGNETIC FIELD OF STRENGTH H FOR DISPERSING IONS ACCELERATED BY AN ION ACCELERATION VOLTAGE V, MEANS TO DETECT A VOLTAGE WHICH IS DIRECTLY PROPORTIONAL TO MASS NUMBER, SAID MEANS COMPRISING FIRST AND SECOND HALL EFFECT DEVICES BOTH DISPOSED WITHIN THE SAID MAGNETIC FIELD, THE OUTPUT TERMINALS OF THE SAID FIRST HALL EFFECT DEVICE BEING CONNECTED TO THE INPUT TERMINALS OF THE SAID SECOND HALL EFFECT DEVICE, AND MEANS TO SUPPLY TO THE SAID FIRST HALL EFFECT DEVICE A CONTROL CURRENT WHICH IS INVERSELY PROPORTIONAL TO THE SAID ION ACCELERATION VOLTAGE V, WHEREBY AN OUTPUT VOLTAGE CORRESPNDING TO THE VALUE H2/V IS PRODUCED BETWEEN THE OUTPUT TERMINALS OF THE SAID SECOND HALL-EFFECT DEVICE.
Claim 2
Dependent Claim
121 words
IN A MASS SPECTROMETRIC OR LIKE APPARATUS HAVING A MAGNETIC FIELD OF STRENGTH H FOR DISPERSING IONS ACCELERATED BY AN ION ACCELERATION VOLTAGE V, MEANS TO DETECT A VOLTAGE WHICH IS DIRECTLY PROPORTIONAL TO MASS NUMBER, SAID MEANS COMPRISING FIRST AND SECOND HALL EFFECT DEVICES BOTH DISPOSED WITHIN THE SAID MAGNETIC FIELD, THE OUTPUT TERMINALS OF THE SAID FIRST HALL EFFECT DEVICE BEING CONNECTED TO THE INPUT TERMINALS OF THE SAID SECOND HALL EFFECT DEVICE, AND MEANS TO SUPPLY TO THE SAID FIRST HALL EFFECT DEVICE A CONTROL CURRENT WHICH IS INVERSELY PROPORTIONAL TO THE SAID ION ACCELERATION VOLTAGE V, WHEREBY AN OUTPUT VOLTAGE CORRESPNDING TO THE VALUE H2/V IS PRODUCED BETWEEN THE OUTPUT TERMINALS OF THE SAID SECOND HALL-EFFECT DEVICE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |