US3372398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed character generator
Assignee: Consolidated Electrodynamics Corp
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Filing: 1966-01-21
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Granted: 1968-03-05
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Expires: 1986-01-21
Abstract
No abstract record available.
Inventors
- 👤 Nairn John Lennox
- 👤 Plante Dale Eugene La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:24
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/08; G09G1/10; H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/83; H03K4/84; H03K6/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
163 words
IN A DIGITAL OSCILLOGRAPH IN WHICH THE DRIVE SPEED OF THE PAPER MAY BE SET AT ANY ONE OF A NUMBER OF RATES, A WAVEFORM GENERATOR FOR GENERATING A PLURALITY OF WAVEFORMS IN WHICH THE TIME SCALE CAN CHANGE WITH CHANGES IN SPEED OF THE PAPER TO MAINTAIN FIXED VERTICAL SIZE AND SHAPE OF EACH CHARACTER, COMPRISING A FIRST SAWTOOTH GENERATOR, MEANS FOR CHANGING THE FREQUENCY OF THE SAWTOOTH GENERATOR WITH CHANGES IN THE PAPER DRIVE SPEED, A CIRCUIT GENERATING A PLURALITY OF RECTANGULAR WAVE OUTPUT SIGNALS HAVING REPETITION FREQUENCIES THAT ARE MULTIPLES OF THE REPETITIVE FREQUENCY OF AN INPUT SIGNAL, MEANS FOR DRIVING THE RECTANGULAR WAVE CIRCUIT IN RESPONSE TO THE OUTPUT OF THE SAWTOOTH GENERATOR, AND MEANS FOR COMBINING PORTIONS OF THE OUTPUTS FROM THE RECTANGULAR WAVE CIRCUIT AND THE SAWTOOTH GENERATOR TO GENERATE A PLURALITY OF OUTPUT SIGNALS HAVING WAVEFORMS IN WHICH THE SLOPE OF ALL LEADING AND TRAILING EDGES ARE FIXED BY THE SLOPE OF THE SAWTOOTH GENERATOR OUTPUT.
References Cited (Backward Citations)
US3182126A
Cited
US3208075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |