US3792285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic circuit installations
Assignee: Fujitsu Services Ltd
•
Filing: 1972-08-23
•
Granted: 1974-02-12
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Expires: 1992-08-23
Abstract
Abstract The circuits of a multicircuit installation using common power feeders, are tested by being electrically isolated from the other circuits, individually activated and tested.
Inventors
- 👤 I Krajewski
- 👤 B Procter
- 👤 C Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/02; G01R1/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
An electronic circuit installation including a plurality of individual circuit elements each having at least first and second power input connections; a test point joined to each second power input connection; at least first and second power lines arranged for connection to a power supply, the first power line being connected directly to the first power input connection of each circuit element; a different diode for each separate circuit element, the diodes respectively being connected between the second power line and the circuit elements and each being arranged to allow power to be fed to the circuits for operation of the installation, the arrangement being such that power applied directly to any one of said test points in the absence of the application of power to said second power line activates only the circuit element associated with that point, the associated diode preventing activation of the remaining circuits of the installation.
Claim 2
Dependent Claim
151 words
An electronic circuit installation including a plurality of individual circuit elements each having at least first and second power input connections; a test point joined to each second power input connection; at least first and second power lines arranged for connection to a power supply, the first power line being connected directly to the first power input connection of each circuit element; a different diode for each separate circuit element, the diodes respectively being connected between the second power line and the circuit elements and each being arranged to allow power to be fed to the circuits for operation of the installation, the arrangement being such that power applied directly to any one of said test points in the absence of the application of power to said second power line activates only the circuit element associated with that point, the associated diode preventing activation of the remaining circuits of the installation.
Claim 3
Dependent Claim
114 words
An electronic circuit installation including a circuit element mounting board; a plurality of individual circuit elements mounted thereon each having at least first and second power supply connections; at least first and second conductive power lines on the board arranged for connection to a power supply, the second power line terminating in an aperture; a plurality of conductive paths on the board communicating one with each of said first power supply connections and connected to said first power line; a further plurality of conductive paths communicating one with each of said second power supply connections, each terminating in a further aperture; and a common shorting element having projections engageable with all of said apertures.
Claim 4
Dependent Claim
114 words
An electronic circuit installation including a circuit element mounting board; a plurality of individual circuit elements mounted thereon each having at least first and second power supply connections; at least first and second conductive power lines on the board arranged for connection to a power supply, the second power line terminating in an aperture; a plurality of conductive paths on the board communicating one with each of said first power supply connections and connected to said first power line; a further plurality of conductive paths communicating one with each of said second power supply connections, each terminating in a further aperture; and a common shorting element having projections engageable with all of said apertures.
Claim 5
Dependent Claim
32 words
An electronic circuit installation as claimed in claim 2, in which the shorting element includes a sheet metal portion from which portion said teeth project, said teeth being integral with said portion.
Claim 6
Dependent Claim
44 words
An electronic circuit installation as claimed in claim 2, in which the shorting element includes a plurality of pins providing teeth and a clip of folded resilient electrically conductive material, the clip being pierced at intervals along the length thereof to receive the pins.
References Cited (Backward Citations)
US3551689A
Cited
US3697767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |