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US5220479A Expired / Lapsed US ⏱️ 0.0 years remaining

Electronic trip device whose front panel is formed by a flat screen display

Assignee: Merlin Gerin SA
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Filing: 1990-11-09
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Granted: 1993-06-15
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Expires: 2010-11-09
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Abstract

Abstract The front panel of the trip device is formed by a flat screen display, for example liquid crystal, controlled by the trip device microprocessor. The display provides a permanent display of the information relating to the type of trip device, the tripping parameters and measured values, from data entered in the trip device memory. Display is in alphanumeric and/or graphic form.

Inventors

  • 👤 Didier Fraisse

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 11:20
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/006

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 163 words
An electronic trip device comprising: an electronic processing unit, including a microprocessor and at least one back-up random-access memory, for receiving output signals from a measuring means that measures the current flowing in conductors to be protected and producing a tripping signal in the event that said signals overshoot preset tripping parameters; a front panel for displaying the tripping parameters and/or various quantities measured by the trip device, wherein the front panel consists essentially of a flat screen display device that is controlled by the microprocessor of the electronic processing unit and connected to an internal battery so as to give a permanent display of various data contained in the memory of the electronic processing unit including indications relating to the type of trip device, the tripping parameters and of fault indication; and receiving means connected to the microprocessor for cooperating with a transmission means of a remote control device that is capable of remotely modifying the tripping parameters contained in the memory.
Claim 2
Dependent Claim 163 words
An electronic trip device comprising: an electronic processing unit, including a microprocessor and at least one back-up random-access memory, for receiving output signals from a measuring means that measures the current flowing in conductors to be protected and producing a tripping signal in the event that said signals overshoot preset tripping parameters; a front panel for displaying the tripping parameters and/or various quantities measured by the trip device, wherein the front panel consists essentially of a flat screen display device that is controlled by the microprocessor of the electronic processing unit and connected to an internal battery so as to give a permanent display of various data contained in the memory of the electronic processing unit including indications relating to the type of trip device, the tripping parameters and of fault indication; and receiving means connected to the microprocessor for cooperating with a transmission means of a remote control device that is capable of remotely modifying the tripping parameters contained in the memory.
Claim 3
Dependent Claim 23 words
The trip device according to claim 1, wherein the display device also displays the values of the quantities measured by the trip device.
Claim 4
Dependent Claim 31 words
The trip device according to claim 1, wherein the indications relating to the type of trip device are entered in the memory remotely by means of a specific remote control device.
Claim 5
Dependent Claim 29 words
The trip device according to claim 3, wherein the indications relating to the type of trip device are not subsequently modifiable, after they have been entered in the memory.
Claim 6
Dependent Claim 22 words
The trip device according to claim 1, wherein certain indications, common to all the trip devices, are integrated in the display device.
Claim 7
Dependent Claim 31 words
The trip device according to claim, 1, wherein the transmission means of the remote control device cooperate with the receiving means of the trip device by means of an infra-red link.
Claim 8
Dependent Claim 31 words
The trip device according to claim 1, wherein the transmission means of the remote control device cooperate with the receiving means of the trip device by means of a two-wire line.
Claim 9
Dependent Claim 19 words
The trip device according to claim 1, wherein the data is displayed in alphanumeric form and/or in graphic form.
Claim 10
Dependent Claim 17 words
The trip device according to claim 1, wherein the display device is a liquid crystal display device.
Claim 11
Dependent Claim 16 words
The trip device according to claim 1, wherein the display device is of the plasma type.

References Cited (Backward Citations)

US4266105A Cited
US4429340A Cited
EP0226530A2 Cited
US4780786A Cited
EP0279691A2 Cited
US5019956A Cited
US5038246A Cited
US4991042A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1996-06-14 1996-12-14 1997-06-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-06-14 2000-12-14 2001-06-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-06-14 2004-12-14 2005-06-15 $7700.00 Window Closed / Lapsed

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