FR2471665A1 - Circuit reducing possibility of TV tube implosion - pulses audio and visual alarms and breaks power supply when abnormal temperature rise occurs near neck of cathode tube - Google Patents
Circuit reducing possibility of TV tube implosion - pulses audio and visual alarms and breaks power supply when abnormal temperature rise occurs near neck of cathode tube Download PDFInfo
- Publication number
- FR2471665A1 FR2471665A1 FR7931191A FR7931191A FR2471665A1 FR 2471665 A1 FR2471665 A1 FR 2471665A1 FR 7931191 A FR7931191 A FR 7931191A FR 7931191 A FR7931191 A FR 7931191A FR 2471665 A1 FR2471665 A1 FR 2471665A1
- Authority
- FR
- France
- Prior art keywords
- switch
- relay
- capacitor
- power supply
- implosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
Description
La présente invention concerne un procédé pour prévenir les dangers d'implosion d'un tube cathodique dans un poste de télévision. The present invention relates to a method for preventing the dangers of implosion of a cathode ray tube in a television set.
L'implosion des tubes cathodiques équipant les télévisions est généralement provoquée par l'augmentation rapide et excessive de la température au niveau d'une partie bien prècise du tube cathodique par rapport à la température ambiante normale, régnant à l'intérieur du châssis de télévision
L'incendie de l'enceinte du poste, provoque soit par un court-circuit, soit par un échauffement anormal de certains composants (résistances chutrices de tension, transformateurs, transducteurs, déviateurs) peut également être à la base d'une implosion de tube cathodique.The implosion of cathode ray tubes fitted to televisions is generally caused by the rapid and excessive increase in temperature at a well-defined part of the cathode ray tube compared to normal ambient temperature, prevailing inside the television chassis.
The fire in the enclosure of the substation, caused either by a short circuit or by an abnormal heating of certain components (voltage drop resistors, transformers, transducers, deflectors) can also be the basis of a tube implosion cathodic.
Le procédé, objet de la présente invention, est un moyen de prévention et de protection, par le fait qu'il dépiste les causes qui engendrent l'implosion. L'invention a pour but de dépister l'élévation brutale et rapide de la température à l'intérieur d'un poste. Le principe repose sur le fait que toute variation de température provoque une variation du magnétisme dans l'enceinte où varie cette température. The method, object of the present invention, is a means of prevention and protection, by the fact that it tracks the causes which generate the implosion. The object of the invention is to detect the sudden and rapid rise in temperature inside a station. The principle is based on the fact that any variation in temperature causes a variation in magnetism in the enclosure where this temperature varies.
La variation de ce magnétisme sera utilisée pour commander la coupure du circuit de sécurité qui avertit l'utilisateur qu'un danger d'implosion est imminent. The variation of this magnetism will be used to control the breaking of the safety circuit which warns the user that an implosion danger is imminent.
Selon une fabrication préférentielle, l'interrupteur tateur peut être remplacé par une résistance à coefficient négatif de température ou un bilame ou tout autre mécanisme sensible à la température. According to a preferred manufacture, the switch interrupter can be replaced by a resistance with negative coefficient of temperature or a bimetallic strip or any other mechanism sensitive to the temperature.
Les dessins annexés aux présentes, illustrent à titre d'exemple non limitatif, un mode de réalisation du procédé objet de l'invention. The drawings appended hereto illustrate, by way of nonlimiting example, an embodiment of the method which is the subject of the invention.
Ces dessins feront apparaître d'autres avantages du procédé, conjointement avec la description ci-dessous. These drawings will show other advantages of the process, together with the description below.
La figure I montre une réalisation du procédé. Figure I shows an embodiment of the method.
Selon la figure I, le système informe le télespectateur qu'un danger se prècise et que la coupure se fait automatiquement .L' information est donnée au moyen d'un signal lumineux clignotant, placé sur la face avant du poste. Ce premier dispositif lumineux peut être synchronisé avec un signal sonore. Il comporte un transformateur 1 d'alimentation qui est branché d'une part sur le circuit 2 d'alimentation du poste de télévision, et, d'autre part, sur le circuit 3 du système avertisseur. Un circuit 4 est relié au circuit 3 par un interrupteur 5, lequel surveille la température de la zône critique. Le circuit 3 comporte une diode 6 et l'interrupteur 5 qui se prolonge par une lampe 7 de signalisation et un avertisseur 8 sonore, d'une part, et par un condensateur 9 chimique et d'un relai 10, d'autre part.Un condensateur 11 positionné en parallèle sur le relai 12 coupe l'interrupteur 13. According to FIG. I, the system informs the viewer that a danger is becoming clear and that the cut-off is done automatically. The information is given by means of a flashing light signal, placed on the front face of the station. This first light device can be synchronized with an audible signal. It comprises a power supply transformer 1 which is connected on the one hand to the power circuit 2 of the television set, and, on the other hand, to the circuit 3 of the warning system. A circuit 4 is connected to circuit 3 by a switch 5, which monitors the temperature of the critical area. The circuit 3 comprises a diode 6 and the switch 5 which is extended by a signaling lamp 7 and an audible warning device 8, on the one hand, and by a chemical capacitor 9 and a relay 10, on the other hand. A capacitor 11 positioned in parallel on the relay 12 cuts the switch 13.
Lorsque l'interrupteur tateur 5 se met en position T(travail),- lz condensateur 9 et relai 10 qui étaient en position R(repos), se mettent également en position travail
T et la lampe 7 s'allume. Le condensateur 9 maintient le relai 10 en position travail jusqu'à ce que la charge du condensateur soit égale à zéro. A cet instant le relai 10 se met à nouveau en position R (repos) et le condensateur 9 se charge à nouveau, puis le relai 10 vient en position T (travail). La lampe 7 se rallume et cet effet alternatif entretient son clignotement.When the switch 5 switches to position T (work), - the capacitor 9 and relay 10 which were in position R (rest), also go to work position
T and the lamp 7 lights up. The capacitor 9 maintains the relay 10 in the working position until the charge of the capacitor is equal to zero. At this time, the relay 10 is again put in position R (rest) and the capacitor 9 is charged again, then the relay 10 comes in position T (work). The lamp 7 lights up again and this alternative effect keeps it flashing.
L'interrupteur 5 a coupé le courant alimentant le relai 12, et le condensateur 11 est chargé et le temps de sa décharge maintient le relai 12 collé. Dès que le condensateur 12 sera déchargé, cela aura pour effet de couper le relai 13 et l'alimentation du poste de télévision. La diode 6 positionnée sur le secondaire de 12 volts du transformateur fournit un courant continu, alimentant en tension le système d'alarme. The switch 5 cut the current supplying the relay 12, and the capacitor 11 is charged and the time of its discharge keeps the relay 12 stuck. As soon as the capacitor 12 is discharged, this will have the effect of cutting off the relay 13 and the power supply to the television set. Diode 6 positioned on the 12-volt secondary of the transformer provides direct current, supplying voltage to the alarm system.
La figure II représente une autre réalisation du procédé. Figure II shows another embodiment of the method.
Selon la figure II, le relai 10 et le condensateur 9 sont supprimés et remplacés par une lampe 7 dont le clignotement s'effectue dès qu'une certaine tension l'alimente. According to FIG. II, the relay 10 and the capacitor 9 are eliminated and replaced by a lamp 7, the flashing of which takes place as soon as a certain voltage supplies it.
La figure III est une autré variante du procédé. Figure III is another variant of the process.
Selon la figure III, le relai 12 et le condensateur 11 sont supprimés. Lorsque l'interrupteur 5 se met en position
T (travail), le relai 10 se met également en position travail et la lampe 7 s'allume. Le condensateur 9 s'étant déchargé, le relai 10 se remet à nouveau en position R (repos) et le cycle continue, la lampe 7 clignote. On peut, selon cette variante, remplacer le condensateur 9 et la lampe 7 par une lampe clignotante.According to Figure III, the relay 12 and the capacitor 11 are eliminated. When switch 5 moves to position
T (work), the relay 10 also goes into the work position and the lamp 7 lights up. The capacitor 9 having discharged, the relay 10 returns again to position R (rest) and the cycle continues, the lamp 7 flashes. According to this variant, it is possible to replace the capacitor 9 and the lamp 7 with a flashing lamp.
Selon cette réalisation le télespectateur doit couper l'alimentation du poste. According to this embodiment, the viewer must cut off the power to the station.
La figure IV est une autre variante du procédé. Figure IV is another variant of the process.
Selon cette dernière, la lampe 7 et l'avertisseur sonore 8 ont également été supprimés. Lorsque l'interrupteur 5 se met en fonction T (travail), la température étant arrivée au point critique, le relai 13 avec un retard du à la charge du condensateur 9 se coupe et l'alimentation du poste de télévision est automatiquement coupée. According to the latter, the lamp 7 and the horn 8 have also been removed. When the switch 5 is set to function T (work), the temperature having reached the critical point, the relay 13 with a delay due to the charge of the capacitor 9 is cut off and the power supply to the television set is automatically cut off.
Selon une autre réalisation, le procédé pourra être muni d'un détecteur de flammes. According to another embodiment, the method may be provided with a flame detector.
Le procédé, objet de l'invention, peut être utilisé tout particulièrement pour les postes de télévision. The process which is the subject of the invention can be used very particularly for television sets.
Claims (6)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7931191A FR2471665A1 (en) | 1979-12-14 | 1979-12-14 | Circuit reducing possibility of TV tube implosion - pulses audio and visual alarms and breaks power supply when abnormal temperature rise occurs near neck of cathode tube |
FR8008353A FR2480499A2 (en) | 1979-12-14 | 1980-04-11 | Implosion preventer for TV receiver - uses temp. smoker or flame detector inside the set to switch off supply and sound or illuminate alarm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7931191A FR2471665A1 (en) | 1979-12-14 | 1979-12-14 | Circuit reducing possibility of TV tube implosion - pulses audio and visual alarms and breaks power supply when abnormal temperature rise occurs near neck of cathode tube |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2471665A1 true FR2471665A1 (en) | 1981-06-19 |
Family
ID=9232973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7931191A Pending FR2471665A1 (en) | 1979-12-14 | 1979-12-14 | Circuit reducing possibility of TV tube implosion - pulses audio and visual alarms and breaks power supply when abnormal temperature rise occurs near neck of cathode tube |
Country Status (1)
Country | Link |
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FR (1) | FR2471665A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0069182A1 (en) * | 1981-07-02 | 1983-01-12 | Gaston Gavarret | Security device for electronic apparatuses and especially for television receivers |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1428858A (en) * | 1965-03-23 | 1966-02-18 | Licentia Gmbh | Temperature control of electrical devices, in particular motors |
-
1979
- 1979-12-14 FR FR7931191A patent/FR2471665A1/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1428858A (en) * | 1965-03-23 | 1966-02-18 | Licentia Gmbh | Temperature control of electrical devices, in particular motors |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0069182A1 (en) * | 1981-07-02 | 1983-01-12 | Gaston Gavarret | Security device for electronic apparatuses and especially for television receivers |
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