Patent US3098197A successfully refreshed from Google Patents.
US3098197A
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Method and apparatus for the measurement of magnetic fields
Assignee: Smiths Detection Toronto Ltd
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Filing: 1960-08-09
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Granted: 1963-07-16
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Expires: 1980-08-09
Abstract
No abstract record available.
Inventors
- 👤 Barringer Anthony Rene
- 👤 Cochituate Sholly Kagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:29
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
APPARATUS FOR MEASURING MAGNETIC FIELDS COMPRISING: A NUCLEAR RESONANCE FREQUENCY SENSING MEANS; AMPLIFIER MEANS AMPLIFYING THE SIGNALS RECEIVED FROM SAID NUCLEAR RESONANCE FREQUENCY SENSING MEANS; AT LEAST ONE PAIR OF PARALLEL BAND PASS FILTERS COVERING CONSECUTIVE FREQUENCY BANDS; STEERING GATE MEANS FOR EACH SAID PAIR OF FILTERS SWITCHING OUT THE WEAKER OF THE FILTERED SIGNALS; AT LEAST TWO FREQUENCY DOUBLERS CONNECTED IN CASCADE FOR MULITPLYING THE SIGNAL PASSED BY SAID STEERING GATE; BAND PASS FILTERING AND WAVE SHAPING MEANS BETWEEN SAID FREQUENCY DOUBLERS; REFERENCE OSCILLATOR CONTROLLED TIME GATE MEANS FOR SAMPLING PORTIONS OF THE MULTIPLIED SIGNAL; COUNTING MEANS COUNTING THE NUMBER OF CYCLES OF SAID SAMPLED PORTION OF SAID MULTIPLIED SIGNAL.
Claim 2
Dependent Claim
111 words
APPARATUS FOR MEASURING MAGNETIC FIELDS COMPRISING: A NUCLEAR RESONANCE FREQUENCY SENSING MEANS; AMPLIFIER MEANS AMPLIFYING THE SIGNALS RECEIVED FROM SAID NUCLEAR RESONANCE FREQUENCY SENSING MEANS; AT LEAST ONE PAIR OF PARALLEL BAND PASS FILTERS COVERING CONSECUTIVE FREQUENCY BANDS; STEERING GATE MEANS FOR EACH SAID PAIR OF FILTERS SWITCHING OUT THE WEAKER OF THE FILTERED SIGNALS; AT LEAST TWO FREQUENCY DOUBLERS CONNECTED IN CASCADE FOR MULITPLYING THE SIGNAL PASSED BY SAID STEERING GATE; BAND PASS FILTERING AND WAVE SHAPING MEANS BETWEEN SAID FREQUENCY DOUBLERS; REFERENCE OSCILLATOR CONTROLLED TIME GATE MEANS FOR SAMPLING PORTIONS OF THE MULTIPLIED SIGNAL; COUNTING MEANS COUNTING THE NUMBER OF CYCLES OF SAID SAMPLED PORTION OF SAID MULTIPLIED SIGNAL.
References Cited (Backward Citations)
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Cited
US2954422A
Cited
US2927271A
Cited
US3030571A
Cited
FR1180455A
Cited
US2987674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |