Patent US3390360A successfully refreshed from Google Patents.
US3390360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current and temperature responsive magnetic control device
Assignee: Individual
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Filing: 1965-01-15
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Granted: 1968-06-25
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Expires: 1985-01-15
Abstract
No abstract record available.
Inventors
- 👤 Umeda Satsuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:16
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/30; H01H37/00; H01H37/02; H01H37/32; H01H37/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A MAGNETIC CONTROL TUBE, COMPRISING AN EVACUATEDC GLASS ENVELOPE, LEAD WIRE PINS EXTENDING THROUGH SAID ENVELOPE, A PERMANENT MAGNET MOVABLY MOUNTED IN SAID ENVELOPE, A FERRIMAGNETISM-THERMISTOR HAVING A NEGATIVE TEMPERATURE COEFFICIENT OF MAGNETISM FIXEDLY MOUNTED IN SAID ENVELOPE ADJACENT SAID MOVABLY MOUNTED MAGNET AND TOWARD WHICH SAID MAGNET IS ATTRACTED BY THE MAGNETIC ATTRACTION FORCE BETWEEN SAID MAGNET AND SAID THERMISTOR, SAID FERRIMAGNETISM-THERMISTOR BEING ELECTRICALLY COUPLED BETWEEN TWO OF SAID PINS, A SPRING BEARING AGAINST THE SAID MAGNET AND URGING IT WAY FROM SAID THERMISTOR AGAINST THE ATTRACTION FORCE, AND AT LEAST ONE PAIR OF CONTACT ELEMENTS ONE OF WHICH IS MECHANICALLY COUPLED TO SAID MAGNET AND MOVABLE BETWEEN TWO POSITIONS WHEN SAID MAGNET MOVES, ONE OF SAID POSITIONS BEING A CLOSED CONTACT POSITION AND THE OTHER BEING AN OPEN CONTACT POSITION, SAID CONTACT ELEMENTS BEING ELECTRICALLY COUPLED BETWEEN TWO OF SAID PINS OTHER THEN THE AFOREMENTIONED PINS.
Claim 2
Dependent Claim
148 words
A MAGNETIC CONTROL TUBE, COMPRISING AN EVACUATEDC GLASS ENVELOPE, LEAD WIRE PINS EXTENDING THROUGH SAID ENVELOPE, A PERMANENT MAGNET MOVABLY MOUNTED IN SAID ENVELOPE, A FERRIMAGNETISM-THERMISTOR HAVING A NEGATIVE TEMPERATURE COEFFICIENT OF MAGNETISM FIXEDLY MOUNTED IN SAID ENVELOPE ADJACENT SAID MOVABLY MOUNTED MAGNET AND TOWARD WHICH SAID MAGNET IS ATTRACTED BY THE MAGNETIC ATTRACTION FORCE BETWEEN SAID MAGNET AND SAID THERMISTOR, SAID FERRIMAGNETISM-THERMISTOR BEING ELECTRICALLY COUPLED BETWEEN TWO OF SAID PINS, A SPRING BEARING AGAINST THE SAID MAGNET AND URGING IT WAY FROM SAID THERMISTOR AGAINST THE ATTRACTION FORCE, AND AT LEAST ONE PAIR OF CONTACT ELEMENTS ONE OF WHICH IS MECHANICALLY COUPLED TO SAID MAGNET AND MOVABLE BETWEEN TWO POSITIONS WHEN SAID MAGNET MOVES, ONE OF SAID POSITIONS BEING A CLOSED CONTACT POSITION AND THE OTHER BEING AN OPEN CONTACT POSITION, SAID CONTACT ELEMENTS BEING ELECTRICALLY COUPLED BETWEEN TWO OF SAID PINS OTHER THEN THE AFOREMENTIONED PINS.
References Cited (Backward Citations)
US2751483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |