US4737955A
Expired / Lapsed
US
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Switch closure test method and apparatus
Assignee: Tektronix Inc
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Filing: 1983-03-15
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Granted: 1988-04-12
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Expires: 2003-03-15
Abstract
Abstract A switch closure test method and apparatus is disclosed in which switch position information in the form of logic signals indicative of switch closure status of a plurality of switches is arranged in a predetermined waveform display format for simultaneous viewing.
Inventors
- 👤 Karen A. Walker
- 👤 Bruce W. Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:37
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/22; G06F11/2205; G06F11/2221; G06F11/30; G06F11/32; G06F11/321; G06F11/322; H; H01; H01H; H01H9/00; H01H9/16; H01H9/167
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
In a waveform display apparatus having a plurality of front-panel switches having selectable switch positions, a switch-selection status test method, comprising the steps of: (a) generating logic signals indicative of the switch position status of said switches; (b) storing the logic signals in a display memory; and (c) reading said logic signals out of said memory and displaying said signals on a display device in a predetermined waveform format wherein each of said plurality of switches has a predetermined display location.
Claim 2
Dependent Claim
81 words
In a waveform display apparatus having a plurality of front-panel switches having selectable switch positions, a switch-selection status test method, comprising the steps of: (a) generating logic signals indicative of the switch position status of said switches; (b) storing the logic signals in a display memory; and (c) reading said logic signals out of said memory and displaying said signals on a display device in a predetermined waveform format wherein each of said plurality of switches has a predetermined display location.
Claim 3
Dependent Claim
56 words
A method in accordance with claim 1 wherein said logic-signal generating step comprises arranging each switch on an input line of a logic circuit in such a manner that a logical 0 is produced when the switch is in a first condition and a logical 1 is produced when the switch is in a second condition.
Claim 4
Dependent Claim
22 words
A method in accordance with claim 1 wherein said displaying step comprises arranging said signals for simultaneous viewing on a cathode-ray tube.
Claim 5
Dependent Claim
65 words
In a waveform display apparatus having a plurality of front-anel switches having selectable switch positions, a switch-selection status test apparatus, comprising: means for generating logic signals indicative of the switch position status of said switches; means for storing said logic signals, and means for displaying said logic signals in a predetermined waveform format wherein each of said plurality of switches has a predetermined display location.
Claim 6
Dependent Claim
65 words
In a waveform display apparatus having a plurality of front-anel switches having selectable switch positions, a switch-selection status test apparatus, comprising: means for generating logic signals indicative of the switch position status of said switches; means for storing said logic signals, and means for displaying said logic signals in a predetermined waveform format wherein each of said plurality of switches has a predetermined display location.
Claim 7
Dependent Claim
47 words
A switch test apparatus in accordance with claim 4 wherein said storing means comprises at least one storage register having an input connected to each of said plurality of switches, a display memory, and control means for transferring the output of said register to said display memory.
Claim 8
Dependent Claim
17 words
A switch test apparatus in accordance with claim 5 whereins aid control means comprises a microprocessing unit.
Claim 9
Dependent Claim
25 words
An apparatus in accordance with claim 4 wherein said displaying means comprises a cathode-ray tube upon which said logic signals are arranged for simultaneous viewing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |