US3587084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Character display apparatus
Assignee: DATA TECHNOLOGY CORP
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Filing: 1968-04-30
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Granted: 1971-06-22
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Expires: 1988-04-30
Abstract
Abstract A continuous display digital readout system is disclosed wherein the indicator tubes are periodically inactivated for short periods of time at a rate exceeding the resolution threshold of the human eye, and the data conversion and counting operations are performed during selected ones of these inactivated periods so that no counting flicker is produced in the readout.
Inventors
- 👤 Rolf Schmidhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:15
CPC Classifications
H; H03; H03K; H03K21/00; H03K21/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
174 words
A character display apparatus for continuously displaying the output of a data handling system, comprising: indicator means responsive to the output of said data handling system and operative to display a digital readout thereof, said indicator means including a plurality of gas discharge tube means each having an anode and a plurality of numerically configured cathodes for providing said digital readout; power supply means coupled to said indicator means and including means for generating a half-wave rectified alternating voltage signal for periodically energizing said indicator means for short periods of time and at a rate substantially imperceptible by the human eye, said means for generating being coupled to the anodes of said tube means whereby said voltage signal alternately supplies an ignition voltage and no voltage thereto; activating means coupled to said power supply means and synchronized with said voltage signal for activating said data handling system inbetween selected ones of said short periods of time, such that only the end products generated by said data handling system are displayed by said indicator means.
Claim 2
Dependent Claim
174 words
A character display apparatus for continuously displaying the output of a data handling system, comprising: indicator means responsive to the output of said data handling system and operative to display a digital readout thereof, said indicator means including a plurality of gas discharge tube means each having an anode and a plurality of numerically configured cathodes for providing said digital readout; power supply means coupled to said indicator means and including means for generating a half-wave rectified alternating voltage signal for periodically energizing said indicator means for short periods of time and at a rate substantially imperceptible by the human eye, said means for generating being coupled to the anodes of said tube means whereby said voltage signal alternately supplies an ignition voltage and no voltage thereto; activating means coupled to said power supply means and synchronized with said voltage signal for activating said data handling system inbetween selected ones of said short periods of time, such that only the end products generated by said data handling system are displayed by said indicator means.
Claim 3
Dependent Claim
79 words
A character display apparatus as set forth in claim 1 wherein said activating means includes an activating signal generating means coupled to said power supply means for producing activating signals in synchronism with said voltage signal, said activating signals being generated inbetween said short periods of time and having time durations of less than the intervals between said short periods of time, said signal generating means being coupled to said data handling means for controlling the actuation times thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |