Patent US3320490A successfully refreshed from Google Patents.
US3320490A
Expired / Lapsed
US
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Electronic combination lock
Assignee: Individual
•
Filing: 1964-09-15
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Granted: 1967-05-16
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Expires: 1984-09-15
Abstract
No abstract record available.
Inventors
- 👤 Hugo M Beck
- 👤 Gerald J Hilwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00674; G07C9/0069; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7062; Y10T70/7068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A SOLID-STATE COMBINATION-OPERATED ELECTRICAL LOCK SYSTEM WHICH OPENS A LOCK WHEN DIGITS OF A COMBINATION ARE ENTERED INTO THE SYSTEM BY A NUMBER OF MANUALLY OPERATED PUSH-BOTTONS IN ACCORDANCE WITH PRESELECTED CONDITIONS, AND PUSH-BUTTON SWITCHES CORRESPONDING TO EACH PUSH-BUTTON, WHICH PUSH-BUTTON SWITCHES ARE CLOSED ONLY WHEN THE CORRESPONDING PUSH-BUTTON IS IN THE PRESSED CONDITION, COMPRISING: INPUT MEANS COMPRISING A PLURALITY OF PUSH-BUTTON SWITCHES WHICH ARE CLOSED WHILE SAID PUSH-BUTTONS ARE PRESSED AND INCLUDING AN OUTPUT FOR EACH OF SAID PUSH-BUTTONS FOR PRODUCING AN OUTPUT SIGNAL WHEN THE RESPECTIVE PUSH-BUTTON IS PRESSED, A TIME INTERVAL GENERATOR FOR PRODUCING AN OUTPUT SIGNAL HAVING A PREDETERMINED DURATION, CIRCUIT MEANS CONNECTED TO SAID INPUT MEANS FOR GENERATING AN OUTPUT SIGNAL WHENEVER TWO OR MORE PUSHBUTTONS ARE PRESSED SIMULTANEOUSLY.
Claim 2
Dependent Claim
124 words
A SOLID-STATE COMBINATION-OPERATED ELECTRICAL LOCK SYSTEM WHICH OPENS A LOCK WHEN DIGITS OF A COMBINATION ARE ENTERED INTO THE SYSTEM BY A NUMBER OF MANUALLY OPERATED PUSH-BOTTONS IN ACCORDANCE WITH PRESELECTED CONDITIONS, AND PUSH-BUTTON SWITCHES CORRESPONDING TO EACH PUSH-BUTTON, WHICH PUSH-BUTTON SWITCHES ARE CLOSED ONLY WHEN THE CORRESPONDING PUSH-BUTTON IS IN THE PRESSED CONDITION, COMPRISING: INPUT MEANS COMPRISING A PLURALITY OF PUSH-BUTTON SWITCHES WHICH ARE CLOSED WHILE SAID PUSH-BUTTONS ARE PRESSED AND INCLUDING AN OUTPUT FOR EACH OF SAID PUSH-BUTTONS FOR PRODUCING AN OUTPUT SIGNAL WHEN THE RESPECTIVE PUSH-BUTTON IS PRESSED, A TIME INTERVAL GENERATOR FOR PRODUCING AN OUTPUT SIGNAL HAVING A PREDETERMINED DURATION, CIRCUIT MEANS CONNECTED TO SAID INPUT MEANS FOR GENERATING AN OUTPUT SIGNAL WHENEVER TWO OR MORE PUSHBUTTONS ARE PRESSED SIMULTANEOUSLY.
References Cited (Backward Citations)
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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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |