Patent US1792608A successfully refreshed from Google Patents.
Patent US3353038A successfully refreshed from Google Patents.
US3353038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal generating arrangement for an electric typewriter and similar apparatus
Assignee: Creed and Co Ltd
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Filing: 1965-09-20
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Granted: 1967-11-14
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Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Mason
- 👤 Graham J L Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:12
CPC Classifications
B; B41; B41J; B41J5/00; B41J5/08; B41J5/14; B41J7/00; B41J7/54; B41J7/68; H; H03; H03K; H03K17/00; H03K17/94; H03K17/96; H03K17/964; H03K17/9643; H03K17/965; H03K17/967; H04; H04L; H04L13/00; H04L13/16; H04L27/00; H04L27/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A KEYBAR ARRANGEMENT FOR KEY-OPERATED APPARATUS COMPRISING A KEYBAR, A VIBRATORY CANTILEVER, A PIEZO-ELECTIC CRYSTAL ELEMENT MOUNTED ON THE CANTILEVER AND ARRANGED TO GENERATE AN ELECTRIC SIGNAL UPON VIBRATORY FLEXURE OF THE CANTILEVER, MAGNET MEANS CAUSING THE CANTILEVER TO BE MECHANICALLY COUPLED TO THE KEYBAR SO AS TO FOLLOW ITS MOVEMENT OVER A GIVEN RANGE, AND MEANS CAUSING DISENGAGEMENT OF THE CANTILEVER FROM THE KEYBAR AND CONSEQUENT VIBRATION OF THE CANTILEVER WHEN THE MOVEMENT OF THE KEYBAR EXCEEDS THE GIVEN RANGE.
Claim 2
Dependent Claim
81 words
A KEYBAR ARRANGEMENT FOR KEY-OPERATED APPARATUS COMPRISING A KEYBAR, A VIBRATORY CANTILEVER, A PIEZO-ELECTIC CRYSTAL ELEMENT MOUNTED ON THE CANTILEVER AND ARRANGED TO GENERATE AN ELECTRIC SIGNAL UPON VIBRATORY FLEXURE OF THE CANTILEVER, MAGNET MEANS CAUSING THE CANTILEVER TO BE MECHANICALLY COUPLED TO THE KEYBAR SO AS TO FOLLOW ITS MOVEMENT OVER A GIVEN RANGE, AND MEANS CAUSING DISENGAGEMENT OF THE CANTILEVER FROM THE KEYBAR AND CONSEQUENT VIBRATION OF THE CANTILEVER WHEN THE MOVEMENT OF THE KEYBAR EXCEEDS THE GIVEN RANGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |