Patent US3394883A successfully refreshed from Google Patents.
US3394883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One key only interlock
Assignee: SENSING DEVICES Inc
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Filing: 1964-11-18
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Granted: 1968-07-30
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Expires: 1984-11-18
Abstract
No abstract record available.
Inventors
- 👤 Spencer D Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:24
CPC Classifications
G; G06; G06K; G06K5/00; G06K5/02; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20238; Y10T74/20244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A KEYLOCK FOR PUNCH KEYS POSITIONED IN A KEYBOARD, SAID KEYBOARD HAVING KEYS ARRANGED IN A PLURALITY OF ROWS CLOSELY ADJACENT TO ONE ANOTHER, A FIRST MEANS OPERATED BY A PUNCHED KEY IN ONE ROW FOR LOCKING ALL THE REMAINING KEYS IN SAID ROW AGAINST OPERATION, AND A SECOND MEANS AT ONE END OF THE KEYLOCK AND COMPRISING A SERIES OF MEMBERS MOVABLE INTO DIRECT CONTACT WITH ONE ANOTHER BY OPERATION OF SAID FIRST MEANS BY SAID KEY FOR LOCKING ALL THE KEYS OF THE REMAINING ROWS AGAINST OPERATION WHEREBY ONLY ONE KEY CAN BE PUNCHED INTO OPERATION AT ONE TIME.
Claim 2
Dependent Claim
101 words
A KEYLOCK FOR PUNCH KEYS POSITIONED IN A KEYBOARD, SAID KEYBOARD HAVING KEYS ARRANGED IN A PLURALITY OF ROWS CLOSELY ADJACENT TO ONE ANOTHER, A FIRST MEANS OPERATED BY A PUNCHED KEY IN ONE ROW FOR LOCKING ALL THE REMAINING KEYS IN SAID ROW AGAINST OPERATION, AND A SECOND MEANS AT ONE END OF THE KEYLOCK AND COMPRISING A SERIES OF MEMBERS MOVABLE INTO DIRECT CONTACT WITH ONE ANOTHER BY OPERATION OF SAID FIRST MEANS BY SAID KEY FOR LOCKING ALL THE KEYS OF THE REMAINING ROWS AGAINST OPERATION WHEREBY ONLY ONE KEY CAN BE PUNCHED INTO OPERATION AT ONE TIME.
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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) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |