US3219816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric rail switch and control system
Assignee: Individual
•
Filing: 1962-11-02
•
Granted: 1965-11-23
•
Expires: 1982-11-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred W Albertson
- 👤 Sr Fred W Albertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:34
CPC Classifications
A; A63; A63H; A63H19/00; A63H19/30; A63H19/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A RAIL SWITCH FOR MODEL RAILROADS COMPRISING A SECTION OF TWO RAIL TRACK, MEANS FOR APPLYING TRACK POWER TO SAID RAILS, AN INTERMEDIATE SECTION IN ONE OF SAID RAILS ELECTRICALLY INSULATED FROM THE REMAINDER OF SAID ONE RAIL, SAID INTERMEDIATE SECTION INCLUDING A PAIR OF SPACED SECTIONS OF RAIL, THE LENGTH OF SAID INTERMEDIATE SECTION BEING LESS THAN THE DISTANCE BETWEEN THE CENTERLINES OF THE AXLES OF A RAILWAY TRUCK PASSING OVER SAID RAIL, ELECTRICALLY CONDUCTIVE MEANS SHUNTING SAID INTERMEDIATE SECTION FOR PRESERVING ELECTRICAL CONTINUITY ALONG SAID ONE RAIL, AND A SEPARATE CONTROL TERMINAL COUPLED TO EACH OF SAID INTERMEDIATE SPACED SECTIONS OF RAIL WHEREBY SAID SWITCH MAY BE CONNECTED TO A CONTROL CIRCUIT WHICH IS INDEPENDENT OF SAID MEANS FOR APPLYING TRACK POWER.
Claim 2
Dependent Claim
124 words
A RAIL SWITCH FOR MODEL RAILROADS COMPRISING A SECTION OF TWO RAIL TRACK, MEANS FOR APPLYING TRACK POWER TO SAID RAILS, AN INTERMEDIATE SECTION IN ONE OF SAID RAILS ELECTRICALLY INSULATED FROM THE REMAINDER OF SAID ONE RAIL, SAID INTERMEDIATE SECTION INCLUDING A PAIR OF SPACED SECTIONS OF RAIL, THE LENGTH OF SAID INTERMEDIATE SECTION BEING LESS THAN THE DISTANCE BETWEEN THE CENTERLINES OF THE AXLES OF A RAILWAY TRUCK PASSING OVER SAID RAIL, ELECTRICALLY CONDUCTIVE MEANS SHUNTING SAID INTERMEDIATE SECTION FOR PRESERVING ELECTRICAL CONTINUITY ALONG SAID ONE RAIL, AND A SEPARATE CONTROL TERMINAL COUPLED TO EACH OF SAID INTERMEDIATE SPACED SECTIONS OF RAIL WHEREBY SAID SWITCH MAY BE CONNECTED TO A CONTROL CIRCUIT WHICH IS INDEPENDENT OF SAID MEANS FOR APPLYING TRACK POWER.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |