Patent US3375439A successfully refreshed from Google Patents.
US3375439A
Expired / Lapsed
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Method and apparatus for testing magnetic heads utilizing a vibrating wire carrying current
Assignee: Boeing North American Inc
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Filing: 1964-12-07
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Granted: 1968-03-26
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Expires: 1984-12-07
Abstract
No abstract record available.
Inventors
- 👤 Yamamoto Yujiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:15
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/455
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
APPARATUS FOR TESTING THE DYNAMIC RESPONSE OF A MAGNETIC HEAD COMPRISING A TAUT WIRE SUSPENDED BETWEEN TWO FIXED POINTS, MEANS FOR CAUSING SAID WIRE TO VIBRATE BETWEEN SAID TWO POINTS, MEANS CONNECTED TO SAID VIBRATING WIRE FOR CONDUCTING A CURRENT THERETHROUGH, MEANS FOR ADJUSTING THE POSITION OF A MAGNETIC HEAD UNDER TEST RELATIVE TO SAID WIRE, AND MEANS ADAPTED TO BE CONNECTED TO SAID MAGNETIC HEAD FOR DISPLAYING THE RESPONSE OF SAID HEAD TO THE MAGNETIC FIELD PROVIDED BY SAID CURRENT SIGNAL THROUGH SAID VIBRATING WIRE.
Claim 2
Dependent Claim
86 words
APPARATUS FOR TESTING THE DYNAMIC RESPONSE OF A MAGNETIC HEAD COMPRISING A TAUT WIRE SUSPENDED BETWEEN TWO FIXED POINTS, MEANS FOR CAUSING SAID WIRE TO VIBRATE BETWEEN SAID TWO POINTS, MEANS CONNECTED TO SAID VIBRATING WIRE FOR CONDUCTING A CURRENT THERETHROUGH, MEANS FOR ADJUSTING THE POSITION OF A MAGNETIC HEAD UNDER TEST RELATIVE TO SAID WIRE, AND MEANS ADAPTED TO BE CONNECTED TO SAID MAGNETIC HEAD FOR DISPLAYING THE RESPONSE OF SAID HEAD TO THE MAGNETIC FIELD PROVIDED BY SAID CURRENT SIGNAL THROUGH SAID VIBRATING WIRE.
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) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |