US3344346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tramp metal detector
Assignee: Reserve Mining Co
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Filing: 1966-05-25
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Granted: 1967-09-26
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Expires: 1986-05-25
Abstract
No abstract record available.
Inventors
- 👤 Homer P Halsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:08
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/10; G01V3/101; G01V3/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A DETECTOR SYSTEM FOR DETERMINING THE PRESENCE OF TRAMP METAL IN A MOVING MAGNETIC ORE BURDEN COMPRISING: (A) AN OSCILLATOR HAVING A SENSING COIL ENERGIZED TO PROVIDE A MAGNETIC FIELD; (B) SAID SENSING COIL BEING ADAPTED TO BE MOUNTED ADJACENT THE MOVING ORE BURDEN SO THAT THE ORE BURDEN PASSES THROUGH THE MAGNETIC FIELD PRODUCED BY SAID SENSING COIL; (C) SAID OSCILLATOR AND SAID SENSING COIL OPERATING AT A FREQUENCY SUCH THAT SAID OSCILLATOR PROVIDES AN OUTPUT SIGNAL HAVING A FIRST AMPLITUDE WITH NO ORE BURDEN IN THE MAGNETIC FIELD, SAID OUTPUT SIGNAL HAVING AN AMPLITUDE GREATER THAN SAID FIRST AMPLITUDE WITH THE ORE BURDEN IN SAID MAGNETIC FIELD, AND SAID OUTPUT SIGNAL HAVING AN AMPLITUDE LESS THAN SAID FIRST AMPLITUDE WITH THE ORE BUEDEN AND TRAMP METAL IN SAID MAGNETIC FIELD; AND (D) ELECTRICAL CIRCUIT MEANS CONNECTED TO RECEIVE SAID OSCILLATOR OUTPUT SIGNAL, SAID ELECTRICAL CIRCUIT MEANS RESPONDING TO SAID OUTPUT SIGNAL WHEN THE AMPLITUDE IS LESS THAN A PREDETERMINED AMPLITUDE AND PROVIDING AN INDICATION FOR EACH RESPONSE.
Claim 2
Dependent Claim
169 words
A DETECTOR SYSTEM FOR DETERMINING THE PRESENCE OF TRAMP METAL IN A MOVING MAGNETIC ORE BURDEN COMPRISING: (A) AN OSCILLATOR HAVING A SENSING COIL ENERGIZED TO PROVIDE A MAGNETIC FIELD; (B) SAID SENSING COIL BEING ADAPTED TO BE MOUNTED ADJACENT THE MOVING ORE BURDEN SO THAT THE ORE BURDEN PASSES THROUGH THE MAGNETIC FIELD PRODUCED BY SAID SENSING COIL; (C) SAID OSCILLATOR AND SAID SENSING COIL OPERATING AT A FREQUENCY SUCH THAT SAID OSCILLATOR PROVIDES AN OUTPUT SIGNAL HAVING A FIRST AMPLITUDE WITH NO ORE BURDEN IN THE MAGNETIC FIELD, SAID OUTPUT SIGNAL HAVING AN AMPLITUDE GREATER THAN SAID FIRST AMPLITUDE WITH THE ORE BURDEN IN SAID MAGNETIC FIELD, AND SAID OUTPUT SIGNAL HAVING AN AMPLITUDE LESS THAN SAID FIRST AMPLITUDE WITH THE ORE BUEDEN AND TRAMP METAL IN SAID MAGNETIC FIELD; AND (D) ELECTRICAL CIRCUIT MEANS CONNECTED TO RECEIVE SAID OSCILLATOR OUTPUT SIGNAL, SAID ELECTRICAL CIRCUIT MEANS RESPONDING TO SAID OUTPUT SIGNAL WHEN THE AMPLITUDE IS LESS THAN A PREDETERMINED AMPLITUDE AND PROVIDING AN INDICATION FOR EACH RESPONSE.
References Cited (Backward Citations)
US2844781A
Cited
US3209245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |