EP0062082A1 - Résistance de sécurité thermosensible - Google Patents

Résistance de sécurité thermosensible Download PDF

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Publication number
EP0062082A1
EP0062082A1 EP81102544A EP81102544A EP0062082A1 EP 0062082 A1 EP0062082 A1 EP 0062082A1 EP 81102544 A EP81102544 A EP 81102544A EP 81102544 A EP81102544 A EP 81102544A EP 0062082 A1 EP0062082 A1 EP 0062082A1
Authority
EP
European Patent Office
Prior art keywords
heat
sensitive
switch
resistance coil
bushing
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.)
Withdrawn
Application number
EP81102544A
Other languages
German (de)
English (en)
Inventor
Pai I. Kuo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP81102544A priority Critical patent/EP0062082A1/fr
Publication of EP0062082A1 publication Critical patent/EP0062082A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/02—Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/164—Heating elements

Definitions

  • the present invention is concerned with a heat sensitive safety resistor which is formed by providing each of the two sides of a silicon insulating piece with a heat-sensitive bimetallic strip which can only contact with each other by the silver contact at the free end thereof, and inserting the resulting assembly into a ceramic bushing which contains composition of good heat conductor such as aluminum, magnesium or zirconium and which is externally provided with two inserters interconnected with each other through a resistance coil wrapping around the bushing.
  • the ceramic bushing and resistance coil are externally enamelled, or overlaid with non-combustible material.
  • It's another object of this invention to provide a safety resistor which can give out an alarming signal when the circuit is overloaded.
  • this invention comprises a silicon insulating piece (1) on which there are mounted two bimetallic strip (3) respectively positioned on the two opposite flat sides thereof, which two bimetallic strips can only contact with each other by a silver contact (2) disposed thereon, which constructs the heat-sensitive switch (7), thereby controlling the making-up or breaking of the circuit through the adjustment of adjusting screw (3 1 ) and the thermal expansion of the bimetallic strip to-result in the on or off of the switch when the temperature rises to a critical degree.
  • the circuit can be electrically connected to an alarming signal device, say a bulb, the lightness of which may vary with the power consumption so that the bulb gives out a stronger light when the power consumption is high.
  • an alarming signal device say a bulb
  • this-invention is formed by inserting the heat-sensitive switch (7) described hereinbefore into a ceramic bushing (4) containing composition of good heat conductors such as aluminum, magnesium, or zirconium. Also, each of the two ends of resistance coil (5) is respectively connected to an inserter (6).
  • the ceramic bushing is externally glazed with a layer of enamel or non-combustible material. When an excess electricity passes through resistance coil (5), the resulting heat can be transferred through the ceramic bushing to affect on the heat-sensitive switch, to open or close the circuit.
  • Fig. 3 there is'shown a wiring diagram of the general switch of a domestic power supply system.
  • switch (8) When switch (8) is switched on, if the full load of the circuit is approached so that the melting of the fuse is impending, the heat produced by the resistance coil (5) is just enough to switch on the heat-sensitive switch in series connection therewith to sound buzzer (9). Meanwhile bulb (10) gives out an alarming signal to remind the user of the safety of using electricity.
  • the measurement of the approximate current passing through a certain circuit can be carried out by varying the resistance coil or heat-sensitive switches (7).
  • this invention can also be applied to electrical mosquito smudge or electric hair curler to avoid the risk of overheating by way of short circuit.
  • a plurality of resistors according to this invention can be connected in series or in parallel, to achieve multiple- sectional alarming effect.
  • a 0.2 ohm resistor which actuates the switch at 100 o C a 0.3 ohm resistor which actuates the switch at 75°C, and a 0.5 ohm resistor, at 50°C, are connected in parallel, to the resistance coil.
  • the heat-sensitive switches are respectively connected to loop circuits having bulbs of different color. With the increasing of the electric current, different bulbs of different hues are stepwise lit, thereby achieving the effect of multiple sectional alarming.
  • the example suggested in Fig. 5, in which the resistors are connected in series can accomplish similar effect as well.
  • the heat-sensitive switch can be designed as shown in Fig. 6, wherein the diverse silver contacts are spaced apart by gaps of different width, to render the different electrical path to be built up at different temperature, so as to achieve multiple sectional alarming effect.

Landscapes

  • Thermally Actuated Switches (AREA)
EP81102544A 1981-04-03 1981-04-03 Résistance de sécurité thermosensible Withdrawn EP0062082A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP81102544A EP0062082A1 (fr) 1981-04-03 1981-04-03 Résistance de sécurité thermosensible

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81102544A EP0062082A1 (fr) 1981-04-03 1981-04-03 Résistance de sécurité thermosensible

Publications (1)

Publication Number Publication Date
EP0062082A1 true EP0062082A1 (fr) 1982-10-13

Family

ID=8187645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102544A Withdrawn EP0062082A1 (fr) 1981-04-03 1981-04-03 Résistance de sécurité thermosensible

Country Status (1)

Country Link
EP (1) EP0062082A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6804558B2 (en) 1999-07-07 2004-10-12 Medtronic, Inc. System and method of communicating between an implantable medical device and a remote computer system or health care provider
US7149773B2 (en) 1999-07-07 2006-12-12 Medtronic, Inc. System and method of automated invoicing for communications between an implantable medical device and a remote computer system or health care provider
EP2085997A3 (fr) * 2008-01-25 2013-07-17 ABB Oy Appareil de contrôle de charge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB502712A (en) * 1937-11-26 1939-03-23 Schiele Industriewerke Improvements in, or relating to, overload release units for automatic circuit breakers and similar electrical switchgear
US2248531A (en) * 1939-03-03 1941-07-08 Richard J Fitz Maurice Thermostat
FR1073667A (fr) * 1953-01-31 1954-09-28 Dispositif thermostatique perfectionné à réglages multiples
US2748222A (en) * 1953-08-11 1956-05-29 Lancey Ralph W De Thermal switches
DE2030077A1 (de) * 1969-06-23 1971-01-07 Wagner Electric Corp., Newark. NJ. (V St.A.) Bimetallrelais

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB502712A (en) * 1937-11-26 1939-03-23 Schiele Industriewerke Improvements in, or relating to, overload release units for automatic circuit breakers and similar electrical switchgear
US2248531A (en) * 1939-03-03 1941-07-08 Richard J Fitz Maurice Thermostat
FR1073667A (fr) * 1953-01-31 1954-09-28 Dispositif thermostatique perfectionné à réglages multiples
US2748222A (en) * 1953-08-11 1956-05-29 Lancey Ralph W De Thermal switches
DE2030077A1 (de) * 1969-06-23 1971-01-07 Wagner Electric Corp., Newark. NJ. (V St.A.) Bimetallrelais
GB1253950A (en) * 1969-06-23 1971-11-17 Wagner Electric Corp Time delay bimetallic relay

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6804558B2 (en) 1999-07-07 2004-10-12 Medtronic, Inc. System and method of communicating between an implantable medical device and a remote computer system or health care provider
US7149773B2 (en) 1999-07-07 2006-12-12 Medtronic, Inc. System and method of automated invoicing for communications between an implantable medical device and a remote computer system or health care provider
EP2085997A3 (fr) * 2008-01-25 2013-07-17 ABB Oy Appareil de contrôle de charge

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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Effective date: 19830919