Patent US3290666A successfully refreshed from Google Patents.
US3290666A
Expired / Lapsed
US
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Collision detector
Assignee: Unisys Corp
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Filing: 1960-03-03
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Granted: 1966-12-06
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Expires: 1980-03-03
Abstract
No abstract record available.
Inventors
- 👤 Beverly L Crew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:15
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/40; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN COMBINATION, A MAGNETIC DRUM ADAPTED TO BE ROTATED, A MAGNETIC HEAD ADAPTED TO FLY OVER THE SURFACE OF SAID DRUM AND ADAPTED TO BE RETRACTED AWAY FROM SAID SURFACE, A CONTROL CIRCUIT ADAPTED TO RAISE SAID HEAD WHEN SAID CIRCUIT IS ACTUATED, AND MEANS FOR DETECTING A COLLISION OF SAID HEAD WITH SAID DRUM FOR ACTUATING SAID CONTROL CIRCUIT IN THE EVENT OF SAID COLLISION.
Claim 2
Dependent Claim
66 words
IN COMBINATION, A MAGNETIC DRUM ADAPTED TO BE ROTATED, A MAGNETIC HEAD ADAPTED TO FLY OVER THE SURFACE OF SAID DRUM AND ADAPTED TO BE RETRACTED AWAY FROM SAID SURFACE, A CONTROL CIRCUIT ADAPTED TO RAISE SAID HEAD WHEN SAID CIRCUIT IS ACTUATED, AND MEANS FOR DETECTING A COLLISION OF SAID HEAD WITH SAID DRUM FOR ACTUATING SAID CONTROL CIRCUIT IN THE EVENT OF SAID COLLISION.
References Cited (Backward Citations)
US2787750A
Cited
US2760063A
Cited
US2772135A
Cited
US2862781A
Cited
GB804441A
Cited
US2948884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |