US3250989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of adjusting sealed switch relays to have equal dwell on front and back contacts when operated with alternating current
Assignee: IXYS Integrated Circuits Division Inc
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Filing: 1963-04-29
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Granted: 1966-05-10
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Koda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:49
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF ADJUSTING A RELAY INCLUDING A SEALED MAGNETIC SWITCH BIASED BY PERMANENT MAGNETIC MEANS FOR BALANCED ALTERNATING CURRENT OPERATION IN WHICH AN ARMATURE ENGAGES OPPOSED CONTACTS FOR EQUAL TIME INTERVALS, WHICH METHOD COMPRISES MEASURING THE ALTERNATING CURRENT OPERATING CHARACTERISTICS OF THE RELAY TO DETERMINE THE TIME INTERVALS THAT THE OPPOSED CONTACTS ARE ENGAGED, APPLYING AN ADJUSTABLE EXTERNAL MAGNETIC FIELD TO THE MAGNETIC SWITCH TO OBTAIN BALANCED OPERATION, MEASURING THE DIRECT CURRENT ENERGY REQUIRED TO OPERATE THE SWITCH WHEN THE EXTERNAL MAGNETIC FIELD IS APPLIED, REMOVING THE EXTERNAL MAGNETIC FIELD, AND ADJUSTING THE PERMANENT MAGNETIC MEANS SO THAT THE SWITCH OPERATES WITH THE MEASURED DIRECT CURRENT ENERGY.
Claim 2
Independent Claim
108 words
A METHOD OF ADJUSTING A RELAY INCLUDING A SEALED MAGNETIC SWITCH BIASED BY PERMANENT MAGNETIC MEANS FOR BALANCED ALTERNATING CURRENT OPERATION IN WHICH AN ARMATURE ENGAGES OPPOSED CONTACTS FOR EQUAL TIME INTERVALS, WHICH METHOD COMPRISES MEASURING THE ALTERNATING CURRENT OPERATING CHARACTERISTICS OF THE RELAY TO DETERMINE THE TIME INTERVALS THAT THE OPPOSED CONTACTS ARE ENGAGED, APPLYING AN ADJUSTABLE EXTERNAL MAGNETIC FIELD TO THE MAGNETIC SWITCH TO OBTAIN BALANCED OPERATION, MEASURING THE DIRECT CURRENT ENERGY REQUIRED TO OPERATE THE SWITCH WHEN THE EXTERNAL MAGNETIC FIELD IS APPLIED, REMOVING THE EXTERNAL MAGNETIC FIELD, AND ADJUSTING THE PERMANENT MAGNETIC MEANS SO THAT THE SWITCH OPERATES WITH THE MEASURED DIRECT CURRENT ENERGY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |