Patent US3744044A successfully refreshed from Google Patents.
Patent US3190975A successfully refreshed from Google Patents.
US3190975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple key switchboard
Assignee: AIRCRAFT RADIO CORP
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Filing: 1960-11-03
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Granted: 1965-06-22
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Expires: 1980-11-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul B King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:15
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A MULTIPLE KEY SWITCHBOARD FOR HIGH FREQUENCY POTENTIALS COMPRISING A HOUSING, A CONTACT BOARD SUPPORTED WITHIN SAID HOUSING CARRYING A PLURALITY OF ROWS OF SPACED CONTACT ELEMENTS ARRANGED IN ALTERNATELY OFFSET COLUMNS, SAID CONTACT ELEMENTS IN SAID ALTERNATE COLUMNS BEING CONNECTED TOGETHER ON ONE SIDE OF SAID BOARD, A SERIES OF CHANNEL-SHAPED SHIELDS DISPOSED ON THE OUTER SIDE OF SAID BOARD IN ALIGNMENT WITH THE ALTERNATE ROWS OF CONTACT ELEMENTS OTHER THAN THOSE IN SAID ALTERNATE COLUMNS, SAID SHIELDS BEING FORMED WITH APERTURES IN THE BASE OF THE CHANNEL ACCOMODATING THE CONTACT ELEMENTS IN SAID ALTERNATE ROWS, A CONDUCTOR EXTENDING ALONG EACH OF SAID CHANNELS AND CONNECTED TO THE TERMINALS IN THE CHANNELS, FIRST COUPLING EXTENDING THROUGH ENDS OF THE HOUSING AND RESPECTIVELY CONNECTED TO THE CONTACT ELEMENT IN EACH OF THE ALTERNATE COLUMNS, SECOND COUPLING EXTENDING THROUGH SIDES OF THE HOUSING AND CONNECTED RESPECTIVELY TO SAID CONDUCTORS, A PLATE ON SAID HOUSING OVERLYING SAID ONE FACE OF SAID BOARD, A PLURALITY OF PLUNGERS EXTENDING THROUGH SAID APERTURES IN SAID PLATE AND SLIDABLY MOUNTED FOR MOVEMENT TOWARD AND FROM SAID BOARD, SAID PLUNGERS BEING ARRANGED IN ROWS AND COLUMNS DISPOSED BETWEEN
Claim 2
Dependent Claim
191 words
A MULTIPLE KEY SWITCHBOARD FOR HIGH FREQUENCY POTENTIALS COMPRISING A HOUSING, A CONTACT BOARD SUPPORTED WITHIN SAID HOUSING CARRYING A PLURALITY OF ROWS OF SPACED CONTACT ELEMENTS ARRANGED IN ALTERNATELY OFFSET COLUMNS, SAID CONTACT ELEMENTS IN SAID ALTERNATE COLUMNS BEING CONNECTED TOGETHER ON ONE SIDE OF SAID BOARD, A SERIES OF CHANNEL-SHAPED SHIELDS DISPOSED ON THE OUTER SIDE OF SAID BOARD IN ALIGNMENT WITH THE ALTERNATE ROWS OF CONTACT ELEMENTS OTHER THAN THOSE IN SAID ALTERNATE COLUMNS, SAID SHIELDS BEING FORMED WITH APERTURES IN THE BASE OF THE CHANNEL ACCOMODATING THE CONTACT ELEMENTS IN SAID ALTERNATE ROWS, A CONDUCTOR EXTENDING ALONG EACH OF SAID CHANNELS AND CONNECTED TO THE TERMINALS IN THE CHANNELS, FIRST COUPLING EXTENDING THROUGH ENDS OF THE HOUSING AND RESPECTIVELY CONNECTED TO THE CONTACT ELEMENT IN EACH OF THE ALTERNATE COLUMNS, SECOND COUPLING EXTENDING THROUGH SIDES OF THE HOUSING AND CONNECTED RESPECTIVELY TO SAID CONDUCTORS, A PLATE ON SAID HOUSING OVERLYING SAID ONE FACE OF SAID BOARD, A PLURALITY OF PLUNGERS EXTENDING THROUGH SAID APERTURES IN SAID PLATE AND SLIDABLY MOUNTED FOR MOVEMENT TOWARD AND FROM SAID BOARD, SAID PLUNGERS BEING ARRANGED IN ROWS AND COLUMNS DISPOSED BETWEEN
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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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |