Patent US4593242A successfully refreshed from Google Patents.
US4593242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit for a delayed sweep oscilloscope
Assignee: Techsearch LLC
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Filing: 1983-10-26
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Granted: 1986-06-03
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Expires: 2003-10-26
Abstract
Abstract In accordance with the present invention, a control circuit for operating a delayed sweep oscilloscope includes a reversible counter which may be selectively incremented or decremented to establish a number of trigger-circuit operating functions and modes, such as trigger source selection, coupling, level, and sweep mode. A plurality of light sources behind a plastic overlay laminated to the front panel indicate the various functions and modes.
Inventors
- 👤 L. Rodney Bristol
- 👤 Alfred K. Hillman, Jr.
- 👤 William Q. Law
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:23
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
A control circuit for an oscilloscope having a normal sweep circuit and a delayed sweep circuit, comprising: electronic control means for selecting at least one of a trigger source and a coupling from a plurality of trigger sources and couplings; indicator means for indicating the selected setting of said electronic control means; switch means for enabling said electronic control means to control the setting for the normal sweep circuit and for the delayed sweep circuit; and memory means coupled to said electronic control means and to said indicator means for storing the settings selected by said electronic control means.
Claim 2
Dependent Claim
99 words
A control circuit for an oscilloscope having a normal sweep circuit and a delayed sweep circuit, comprising: electronic control means for selecting at least one of a trigger source and a coupling from a plurality of trigger sources and couplings; indicator means for indicating the selected setting of said electronic control means; switch means for enabling said electronic control means to control the setting for the normal sweep circuit and for the delayed sweep circuit; and memory means coupled to said electronic control means and to said indicator means for storing the settings selected by said electronic control means.
Claim 3
Dependent Claim
33 words
A control circuit for an oscilloscope according to claim 1, wherein said indicator means comprises a plastic plate having indication characters printed thereon and a plurality of LEDs provided behind said plastic plate.
Claim 4
Dependent Claim
19 words
A control circuit for an oscilloscope acording to claim 1, wherein said LEDs emit different colors for different functions.
Claim 5
Dependent Claim
19 words
A control circuit for an oscilloscope according to claim 1, wherein said electronic control means comprises a reversible counter.
References Cited (Backward Citations)
US3879722A
Cited
US4372054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |