US3220356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Model train control system
Assignee: Individual
•
Filing: 1962-12-03
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Granted: 1965-11-30
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Donald J Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:53
CPC Classifications
A; A63; A63H; A63H19/00; A63H19/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A CONTROL SYSTEM FOR A PAIR OF VEHICLES BOTH DERIVING ENERGY FROM A COMMON PAIR OF CONDUCTORS: A PAIR OF POWER UNITS FOR THE VEHICLES HAVING OPPOSITELY POLARIZED UNIDIRECTIONALLY CONDUCTIVE ELEMENTS WHEREBY THE UNITS DERIVE EXCITATION FROM OPPOSITE HALF CYCLES OF AN ALTERNATING CURRENT SOURCE APPLIED TO SAID CONDUCTORS; SAID POWER UNITS EACH INCLUDING A MOTOR; EACH POWER UNIT INCLUDING A RELAY OPERATIVE TO REVERSE THE MOTOR CONNECTIONS AND IN RESPONSE TO A POLARIZED SIGNAL TRANSMITTED VIA THE CORRESPONDING UNIDIRECTIONALLY CONDUCTIVE ELEMENT; AND MEANS FOR SEPARATELY SUPPLYING SIGNALS TO SAID CONDUCTORS OF OPPOSITE POLARITIES RESPECTIVELY TO OPERATE THE CORRESPONDING REVERSING RELAY.
Claim 2
Dependent Claim
101 words
A CONTROL SYSTEM FOR A PAIR OF VEHICLES BOTH DERIVING ENERGY FROM A COMMON PAIR OF CONDUCTORS: A PAIR OF POWER UNITS FOR THE VEHICLES HAVING OPPOSITELY POLARIZED UNIDIRECTIONALLY CONDUCTIVE ELEMENTS WHEREBY THE UNITS DERIVE EXCITATION FROM OPPOSITE HALF CYCLES OF AN ALTERNATING CURRENT SOURCE APPLIED TO SAID CONDUCTORS; SAID POWER UNITS EACH INCLUDING A MOTOR; EACH POWER UNIT INCLUDING A RELAY OPERATIVE TO REVERSE THE MOTOR CONNECTIONS AND IN RESPONSE TO A POLARIZED SIGNAL TRANSMITTED VIA THE CORRESPONDING UNIDIRECTIONALLY CONDUCTIVE ELEMENT; AND MEANS FOR SEPARATELY SUPPLYING SIGNALS TO SAID CONDUCTORS OF OPPOSITE POLARITIES RESPECTIVELY TO OPERATE THE CORRESPONDING REVERSING RELAY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |