US3217240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Movable core transformer control device
Assignee: Kaman Aircraft Corp
•
Filing: 1961-06-07
•
Granted: 1965-11-09
•
Expires: 1981-06-07
Abstract
No abstract record available.
Inventors
- 👤 James B Grant
- 👤 Harold S Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:17
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/22; G01D5/2208; G01D5/2216; B; B62; B62D; B62D15/00; B62D15/02; B64; B64C; B64C27/00; B64C27/32; B64C27/54; F; F15; F15B; F15B9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
AN ELECTRIC CONTROL DEVICE COMPRISING: A TRANSFORMER HAVING A PRIMARY WINDING ADAPTED FOR ENERGIZATION BY AN ALTERNATING CURRENT SOURCE, A SECONDARY WINDING MEANS HAVING A PAIR OF OUTPUT TERMINALS, AND A MOVABLE CORE THE POSITION OF WHICH CONTROLS THE OUTPUT SIGNAL DERIVED FROM SAID SECONDARY WINDING AND WHICH OUTPUT SIGNAL NORMALLY APPEARS ACROSS SAID OUTPUT TERMINALS; AND MEANS FOR INTERRUPTING THE ELECTRICAL CIRCUIT BETWEEN SAID SECONDARY WINDING MEANS AND SAID OUTPUT TERMINALS WHEN SAID CORE IS LOCATED WITHIN A PREDETERMINED DEAD BAND COMPRISING A PORTION OF ITS RANGE OF TRAVEL SO THAT NO OUTPUT SIGNAL IS PRODUCED AT SAID OUTPUT TERMINALS WHEN SAID CORE IS WITHIN SAID DEAD BAND.
References Cited (Backward Citations)
US2325548A
Cited
US2466028A
Cited
US2289882A
Cited
US2306000A
Cited
US2512902A
Cited
US2636386A
Cited
US2708730A
Cited
US2785256A
Cited
US2770768A
Cited
US2861756A
Cited
US2820117A
Cited
US3021097A
Cited
US3089081A
Cited
US2997565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |