US3193607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key switch assembly
Assignee: Chicago Musical Instrument Co
•
Filing: 1961-03-07
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Granted: 1965-07-06
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Expires: 1981-03-07
Abstract
No abstract record available.
Inventors
- 👤 Walter J Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:43
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/32; G10H1/34; Y; Y10; Y10S; Y10S84/00; Y10S84/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A KEY SWITCH COMPRISING IN COMBINATION: AN ELECTRICALLY CONDUCTIVE PLATE; AN ELECTRICAL CONDUCTIVE KEY ELEMENT RECIPROCABLY SUPPORTED IN ELECTRICAL CONTACT WITH SAID PLATE; A PAIR OF SEPARATE ELECTRICAL CONDUCTORS DISPOSED ADJACENT TO BUT SPACED DIFFERENT DISTANCES FROM SAID KEY ELEMENT AND ELECTRICALLY INSULATED THEREFROM AND FROM EACH OTHER; AND AN ELECTRICALLY CONDUCTIVE ARM ELECTRICALLY CONDUCTIVELY SECURED TO SAID CONDUCTIVE KEY ELEMENT AND EXTENDING THEREFROM TRANSVERSELY TO SAID CONDUCTORS AND TRANSVERSELY TO THE DIRECTION IN WHICH SAID KEY ELEMENT IS RECIPROCABLE AND SELECTIVELY ENGAGEABLE SIMULTANEOUSLY WITH BOTH SAID CONDUCTORS IN RESPONSE TO RECIPROCATION OF SAID KEY ELEMENT; AND AN INSULATOR ENGAGEABLE WITH BOTH SAID ARM AND THAT ONE OF SAID CONDUCTORS WHICH IS NEARER TO SAID KEY ELEMENT IN A MANNER TO PRECLUDE ELECTRICAL CONTINUITY THEREBETWEEN DURING SAID ENGAGEMENT.
Claim 2
Dependent Claim
128 words
A KEY SWITCH COMPRISING IN COMBINATION: AN ELECTRICALLY CONDUCTIVE PLATE; AN ELECTRICAL CONDUCTIVE KEY ELEMENT RECIPROCABLY SUPPORTED IN ELECTRICAL CONTACT WITH SAID PLATE; A PAIR OF SEPARATE ELECTRICAL CONDUCTORS DISPOSED ADJACENT TO BUT SPACED DIFFERENT DISTANCES FROM SAID KEY ELEMENT AND ELECTRICALLY INSULATED THEREFROM AND FROM EACH OTHER; AND AN ELECTRICALLY CONDUCTIVE ARM ELECTRICALLY CONDUCTIVELY SECURED TO SAID CONDUCTIVE KEY ELEMENT AND EXTENDING THEREFROM TRANSVERSELY TO SAID CONDUCTORS AND TRANSVERSELY TO THE DIRECTION IN WHICH SAID KEY ELEMENT IS RECIPROCABLE AND SELECTIVELY ENGAGEABLE SIMULTANEOUSLY WITH BOTH SAID CONDUCTORS IN RESPONSE TO RECIPROCATION OF SAID KEY ELEMENT; AND AN INSULATOR ENGAGEABLE WITH BOTH SAID ARM AND THAT ONE OF SAID CONDUCTORS WHICH IS NEARER TO SAID KEY ELEMENT IN A MANNER TO PRECLUDE ELECTRICAL CONTINUITY THEREBETWEEN DURING SAID ENGAGEMENT.
References Cited (Backward Citations)
US1040705A
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US1761867A
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US2082067A
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US2456893A
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US2487977A
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US2941433A
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US3001432A
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US2881293A
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US2996295A
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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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |