US3154640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coded call letter generator utilizing cold-cathode, glow-transfer tube
Assignee: ACF Industries Inc
•
Filing: 1960-10-20
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Granted: 1964-10-27
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Expires: 1980-10-20
Abstract
No abstract record available.
Inventors
- 👤 Albert E Schierhorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:28
CPC Classifications
H; H04; H04L; H04L15/00; H04L15/04; H04L15/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN ELECTRONIC CALL LETTER KEYER COMPRISING A PLURALITY OF CALL LETTER SELECTORS, FIRST MEANS FOR CONVERTING THE SELECTED CALL LETTERS INTO CODED ELECTRICAL PULSES, GATING MEANS, SECOND MEANS FOR SEQUENCING SAID GATING MEANS TO ALLOW THE CODED PULSES REPRESENTING EACH CALL LETTER TO PASS ONE AFTER ANOTHER THROUGH SAID GATING MEANS, AND OUTPUT MEANS CONNECTED TO SAID GATING MEANS FOR PROVIDING A SERIES OF CODED AUDIO PULSES REPRESENTING SAID SELECTED CALL LETTERS, SAID FIRST MEANS COMPRISING A FIRST COLD-CATHODE, GLOW-TRANSFER TUBE HAVING A PLURALITY OF CATHODE ELEMENTS CONNECTED TO SAID CALL LETTER SELECTORS, AND FURTHER INCLUDING THIRD MEANS FOR COMMUTATING THE CONDUCTION BEAM OF SAID FIRST GLOW-TRANSFER TUBE FROM
Claim 2
Dependent Claim
109 words
AN ELECTRONIC CALL LETTER KEYER COMPRISING A PLURALITY OF CALL LETTER SELECTORS, FIRST MEANS FOR CONVERTING THE SELECTED CALL LETTERS INTO CODED ELECTRICAL PULSES, GATING MEANS, SECOND MEANS FOR SEQUENCING SAID GATING MEANS TO ALLOW THE CODED PULSES REPRESENTING EACH CALL LETTER TO PASS ONE AFTER ANOTHER THROUGH SAID GATING MEANS, AND OUTPUT MEANS CONNECTED TO SAID GATING MEANS FOR PROVIDING A SERIES OF CODED AUDIO PULSES REPRESENTING SAID SELECTED CALL LETTERS, SAID FIRST MEANS COMPRISING A FIRST COLD-CATHODE, GLOW-TRANSFER TUBE HAVING A PLURALITY OF CATHODE ELEMENTS CONNECTED TO SAID CALL LETTER SELECTORS, AND FURTHER INCLUDING THIRD MEANS FOR COMMUTATING THE CONDUCTION BEAM OF SAID FIRST GLOW-TRANSFER TUBE FROM
References Cited (Backward Citations)
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US2495739A
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US2715782A
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US2848647A
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GB820923A
Cited
US3007001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |