US5079542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abnormal temperature detector for electronic apparatus
Assignee: NEC Corp
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Filing: 1991-03-06
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Granted: 1992-01-07
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Expires: 2011-03-06
Abstract
Abstract An abnormal temperature detector for an electronic apparatus includes a plurality of temperature detectors, an abnormality detector, and a power supply controller. The plurality of temperature detectors are arranged at least at one detection point of a rack, of an electronic apparatus, in which a plurality of wiring boards having IC elements mounted thereon are housed, and respectively output detection outputs when a temperature at the detection point becomes a preset temperature or more. The abnormality detector detects that detection outputs are output from all the temperature detectors at the detection point. The power supply controller interrupts a power supply of the apparatus in response to an abnormality detection output from the abnormality detector.
Inventors
- 👤 Kazuhiko Umezawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:09
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/06; G08B21/00; G08B21/18; G08B21/182; H; H02; H02H; H02H3/00; H02H3/02; H02H3/05; H02H5/00; H02H5/04; H02H5/047
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
An abnormal temperature detector for an electronic apparatus, comprising: a plurality of temperature detecting means, arranged at least at one detection point of a rack of an electronic apparatus, in which a plurality of wiring boards having IC elements mounted thereon are housed, for respectively outputting overtemperature signals when a temperature at one of said at least one detection point becomes not less than a preset temperature; abnormality detecting means for signalling when said preset temperature is sensed by all the temperature detecting means at said one detection point; and power supply control means are interrupting a power supply to the apparatus in response to an abnormality detection output from said abnormality detecting means.
Claim 2
Dependent Claim
114 words
An abnormal temperature detector for an electronic apparatus, comprising: a plurality of temperature detecting means, arranged at least at one detection point of a rack of an electronic apparatus, in which a plurality of wiring boards having IC elements mounted thereon are housed, for respectively outputting overtemperature signals when a temperature at one of said at least one detection point becomes not less than a preset temperature; abnormality detecting means for signalling when said preset temperature is sensed by all the temperature detecting means at said one detection point; and power supply control means are interrupting a power supply to the apparatus in response to an abnormality detection output from said abnormality detecting means.
Claim 3
Dependent Claim
28 words
A detector according to claim 1, wherein each of said temperature detecting means includes one contact which is opened at a temperature not less than the preset temperature.
Claim 4
Dependent Claim
34 words
A detector according to claim 2, wherein said contact of each of said temperature detecting means constitute a parallel circuit, and two terminals of said parallel circuit are connected to said abnormality detecting means.
Claim 5
Dependent Claim
14 words
A detector according to claim 2, wherein a plurality of detection points are arranged.
Claim 6
Dependent Claim
39 words
A detector according to claim 4, wherein said temperature detecting means at each detection point constitute a parallel circuit, and said plurality of parallel circuits at the respective detection points are connected in series with said abnormality detecting means.
Claim 7
Dependent Claim
58 words
A detector according to claim 4, wherein said temperature detecting means at each detection point comprise opposing contacts which are respectively connected to said abnormality detecting means through independent, parallel wiring systems, and said abnormality detecting means outputs a detection output upon detecting that said contacts of said temperature detecting means in all said wiring systems are opened.
Claim 8
Dependent Claim
43 words
A detector according to claim 6, further comprising alarm means for generating an alarm, said abnormality detecting means driving said alarm means upon detecting an open state of said contact of said temperature detecting means in only one part of said wiring system.
Claim 9
Dependent Claim
35 words
A detector according to claim 6, wherein two terminals of one of said opposing contacts of said temperature detecting means at each detection point are connected to those of the other of said opposing contacts.
Claim 10
Dependent Claim
24 words
A detector according to claim 1, wherein said rack in which said plurality of wiring boards are housed is forcibly cooled by cooling fans.
References Cited (Backward Citations)
US4399428A
Cited
US4611197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |