US3098197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 18:10
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)
USRE23769E
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 |