Patent US2771970A successfully refreshed from Google Patents.
US3198982A
Expired / Lapsed
US
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Fluorescent light reversing circuit for facsimile transmitters
Assignee: Stewart Warner Corp
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Filing: 1961-01-13
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Granted: 1965-08-03
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Expires: 1981-01-13
Abstract
No abstract record available.
Inventors
- 👤 Benson Robert
- 👤 Zilgalvis Ansis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:23
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00681; H04N1/00742; H04N1/00745; H04N1/00763; H04N1/00774; H04N1/00782
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
APPARATUS FOR ILLUMINATING COPY IN A FACSIMILE TRANSMITTER COMPRISING A PAIR OF FLUORESCENT LAMPS POSITIONALLY ARRANGED IN PARALLEL ALIGNMENT TRANSVERSE TO THE PATH OF TRAVEL OF THE COPY AND EACH HAVING CONSTANTLY ENERGIZED FILAMENTS AT EITHER END, EACH LAMP HAVING ITS ENDS ELECTRICALLY CONNECTED TO THE OPPOSITE ENDS OF THE OTHER LAMP, A DIRECT CURRENT POWER SOURCE, A FIRST RELAY HAVING DOUBLE POLE, DOUBLE THROW CONTACTS IN CONNECTION BETWEEN SAID POWER SOURCE AND SAID FLUORESCENT LAMPS, SAID CONTACTS BEING OPERABLE TO REVERSE THE POLARITY OF POWER TO SAID FLUORESCENT LAMPS, A COPY-FEED SWITCH ACTUATABLE BY THE LEADING EDGE OF EACH PIECE OF COPY FED TO THE FACSIMILE TRANSMITTER, A SECOND RELAY OPERABLE RESPONSIVE TO SAID COPY-FEED SWITCH FOR ENERGIZING SAID FIRST RELAY TO ACTUATE
References Cited (Backward Citations)
US2792448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |