US3240900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric relay
Assignee: Individual
•
Filing: 1961-12-21
•
Granted: 1966-03-15
•
Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Albert H Halff
- 👤 Allen F Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:15
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/64; H01H50/72; H01H29/00; H01H29/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
AN ELECTRIC RELAY COMPRISING A POOL OF LIQUID MERCURY, MEANS FOR SUPPORTING SAID POOL WITH A SURFACE IN SUBSTANTIALLY CONSTANT RELATION WITH A GIVEN CENTER AREA IRRESPECTIVE OF THE POSITION OF THE RELAY, CONDUCTIVE MEANS IN SAID CENTER AREA FOR BRIDGING BY SAID MERCURY POOL TO PASS CURRENT THEREWITH, AN ELECTROMAGNETIC COIL FORMING A FLUX HAVING THE CENTER CONVERGENCE IN SAID CENTER AREA AND A MAGNETIC PLUNGER FLOATING IN SAID MERCURY POOL IN AN OFFSET POSITION ON DEENERGIZATION OF SAID COIL IRRESPECTIVE OF THE POSITION OF SAID RELAY AND ACTUATED BY THE COIL TO MOVE TO AN INTERMEDIATE POSITION VARYING THE SURFACE OF THE POOL WITH RESPECT TO SAID CONDUCTIVE MEANS.
Claim 2
Dependent Claim
111 words
AN ELECTRIC RELAY COMPRISING A POOL OF LIQUID MERCURY, MEANS FOR SUPPORTING SAID POOL WITH A SURFACE IN SUBSTANTIALLY CONSTANT RELATION WITH A GIVEN CENTER AREA IRRESPECTIVE OF THE POSITION OF THE RELAY, CONDUCTIVE MEANS IN SAID CENTER AREA FOR BRIDGING BY SAID MERCURY POOL TO PASS CURRENT THEREWITH, AN ELECTROMAGNETIC COIL FORMING A FLUX HAVING THE CENTER CONVERGENCE IN SAID CENTER AREA AND A MAGNETIC PLUNGER FLOATING IN SAID MERCURY POOL IN AN OFFSET POSITION ON DEENERGIZATION OF SAID COIL IRRESPECTIVE OF THE POSITION OF SAID RELAY AND ACTUATED BY THE COIL TO MOVE TO AN INTERMEDIATE POSITION VARYING THE SURFACE OF THE POOL WITH RESPECT TO SAID CONDUCTIVE MEANS.
References Cited (Backward Citations)
US1984478A
Cited
US2501292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |