Patent US3587809A successfully refreshed from Google Patents.
US3587809A
Expired / Lapsed
US
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Coin tester with slotted coin guide duct
Assignee: Autelca AG
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Filing: 1969-01-31
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Granted: 1971-06-28
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Expires: 1989-01-31
Abstract
Abstract A COIN TESTER HAS AN OSCILLATOR WITH A SELF-INDUCATION COIL SURROUNDING A COIN DUCT , THE OSCALLATOR TEMPORAILY VARYING THE OSCILLATION THEREOF IN RESPONSE TO THE EFFECT ON THE FIELD OF THE COIL OF AN OBJECT PASSING THROUGH THE COIN DUCT, AND MEANS RESPONSIVE TO THE VARIATION FOR INDICATING WHETHER THE OBJECT IA AN ACCEPTABLE COIN. THE WALL OF THE DUCT IN THE VICINITY OF THE COIL MAY BE MADE OF INSULATING MATERIAL OR OF METAL FORMED WITH A SLOT WITH INSULATING MATERIAL IN THE SLOT.
Inventors
- 👤 Mario Meloni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:47
CPC Classifications
G; G07; G07D; G07D5/00; G07D5/08
Claims Analysis
Total Claims: 0
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |