US3553729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relay having adjustable biasing means to prevent chattering of the switch contacts
Assignee: Panasonic Electric Works Co Ltd
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Filing: 1969-09-25
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Granted: 1971-01-05
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Expires: 1989-09-25
Abstract
Abstract A CHATTERING-LESS ELECTRIC RELAY, OF WHICH MOVABLE CONTACTS ARE SWITCHED OVER IN ACCORDANCE WITH DOWNWARD ATTRACTION AND UPWARD DEATTERATION OF AN ARMATURE TO A YOKE THROUGH A CARD NORMALLY BIASED UPWARDLY, THE ARMATURE INCLUDES AN ADJUSTABLE BIASING MEANS TO URGE THE CARD DOWNWARDLY WHEN THE ARMATURE IS BEING ATTRACTED AND TO URGE THE ARMATURE ITSELF UPWARDLY AT BOTH LAST STAGE OF THE ATTRACTION AND INITIAL STAGE OF THE DEATTRACTION. THERE IS PROVIDED A SMALL GAP BETWEEN THE CARD AND THE BIASING MEANS DURING DEATTRACITON OF THE ARMATURE.
Inventors
- 👤 Tetsuo Mori
- 👤 Makoto Iwabuchi
- 👤 Hideoki Yoshioka
- 👤 Kenji Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:44
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H51/04; H01H51/06; H01H50/00; H01H50/02; H01H50/04; H01H50/041; H01H2050/046
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |