US3210657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance-change temperature sensing apparatus for a.c. motor windings having a.c. and d.c. sources in series
Assignee: Texas Instruments Inc
•
Filing: 1960-08-12
•
Granted: 1965-10-05
•
Expires: 1980-08-12
Abstract
No abstract record available.
Inventors
- 👤 Charles D Flanagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/18; G01K7/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
RESISTANCE-CHANGE TEMPERATURE SENSING APPARATUS FOR AN A.C. ELECTROMAGNETIC WINDING COMPRISING AN A.C. CIRCUIT HAVING AN A.C. POWER SOURCE THEREIN, A SOURCE OF D.C. POWER IN SAID A.C. CIRCUIT CONNECTED IN SERIES WITH SAID A.C. SOURCE, SAID D.C. POWER SOURCE HAVING A SUFFICIENTLY LOW A.C. IMPEDNACE TO PASS A.C. CURRENT WITHOUT SUBSTANTIAL VOLTAGE DROP AS COMPARED WITH THE A.C. VOLTAGE DROP OF SAID WINDING, A BRIDGE NETWORK HAVING INPUT TERMINALS IN SAID A.C. CIRCUIT PLACIANG THE NETWORK IN SERIES-CIRCUIT RELATION WITH SAID D.C. AND A.C. SOURCES
References Cited (Backward Citations)
US2152439A
Cited
US2476317A
Cited
US2565922A
Cited
US2635225A
Cited
US2728337A
Cited
US2919404A
Cited
US2782102A
Cited
US3004216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |