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EP1326481A3 - PTC resistors and method of making - Google Patents

PTC resistors and method of making Download PDF

Info

Publication number
EP1326481A3
EP1326481A3 EP02079018A EP02079018A EP1326481A3 EP 1326481 A3 EP1326481 A3 EP 1326481A3 EP 02079018 A EP02079018 A EP 02079018A EP 02079018 A EP02079018 A EP 02079018A EP 1326481 A3 EP1326481 A3 EP 1326481A3
Authority
EP
European Patent Office
Prior art keywords
fitting
tube
magnesium oxide
making
heating element
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.)
Granted
Application number
EP02079018A
Other languages
German (de)
French (fr)
Other versions
EP1326481B1 (en
EP1326481A2 (en
Inventor
Alberto Nicoli
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.)
ht SpA
Original Assignee
MOSE ANSTALT
Mose' Anstalt
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 MOSE ANSTALT, Mose' Anstalt filed Critical MOSE ANSTALT
Publication of EP1326481A2 publication Critical patent/EP1326481A2/en
Publication of EP1326481A3 publication Critical patent/EP1326481A3/en
Application granted granted Critical
Publication of EP1326481B1 publication Critical patent/EP1326481B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/52—Apparatus or processes for filling or compressing insulating material in tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H01C1/028—Housing; Enclosing; Embedding; Filling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath
    • H01C1/03—Housing; Enclosing; Embedding; Filling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath with powdered insulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Resistance Heating (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Thermistors And Varistors (AREA)
  • Wing Frames And Configurations (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
  • Hinges (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Method for producing class 2 resistors with PTCs, including the following phases:
  • fitting, inside a tube (1) which constitutes the container of the resistor, at least two layers of insulating material (2) in correspondence with the internal surface of said tube;
  • fitting a heating element composed of one or more PTC elements (4) clamped between a pair of diffusers (5) inside said tube, after fitting one or more centring elements;
  • filling the spaces between said heating element and said insulating layer with pulverized magnesium oxide (6);
  • compacting said magnesium oxide;
in which the dimensions of the magnesium oxide grains are below 200 microns.
EP02079018A 2002-01-07 2002-09-30 Method of making a heating resistor with PTC elements Expired - Lifetime EP1326481B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH222002 2002-01-07
CH00022/02A CH696614A5 (en) 2002-01-07 2002-01-07 Method for producing class 2 resistors with PTC resistors and so produced.

Publications (3)

Publication Number Publication Date
EP1326481A2 EP1326481A2 (en) 2003-07-09
EP1326481A3 true EP1326481A3 (en) 2003-07-23
EP1326481B1 EP1326481B1 (en) 2005-01-12

Family

ID=4228650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02079018A Expired - Lifetime EP1326481B1 (en) 2002-01-07 2002-09-30 Method of making a heating resistor with PTC elements

Country Status (6)

Country Link
EP (1) EP1326481B1 (en)
AT (1) ATE287194T1 (en)
BR (1) BR8200046U (en)
CH (1) CH696614A5 (en)
DE (1) DE60202586T8 (en)
ES (1) ES2234979T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120217233A1 (en) * 2011-02-28 2012-08-30 Tom Richards, Inc. Ptc controlled environment heater
US11118810B2 (en) 2017-10-19 2021-09-14 Tom Richards, Inc. Heat transfer assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB832503A (en) * 1956-01-17 1960-04-13 British Insulated Callenders Improvements relating to electric heating cables
US4087777A (en) * 1973-12-21 1978-05-02 Dynamit Nobel Aktiengesellschaft Electrical heating assembly having a thermally conductive refractory electrical insulating embedding composition between an electrically conductive member and a jacket
US4104509A (en) * 1975-09-23 1978-08-01 U.S. Philips Corporation Self-regulating heating element
US4147927A (en) * 1975-04-07 1979-04-03 U.S. Philips Corporation Self-regulating heating element
US4972067A (en) * 1989-06-21 1990-11-20 Process Technology Inc. PTC heater assembly and a method of manufacturing the heater assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB832503A (en) * 1956-01-17 1960-04-13 British Insulated Callenders Improvements relating to electric heating cables
US4087777A (en) * 1973-12-21 1978-05-02 Dynamit Nobel Aktiengesellschaft Electrical heating assembly having a thermally conductive refractory electrical insulating embedding composition between an electrically conductive member and a jacket
US4147927A (en) * 1975-04-07 1979-04-03 U.S. Philips Corporation Self-regulating heating element
US4104509A (en) * 1975-09-23 1978-08-01 U.S. Philips Corporation Self-regulating heating element
US4972067A (en) * 1989-06-21 1990-11-20 Process Technology Inc. PTC heater assembly and a method of manufacturing the heater assembly

Also Published As

Publication number Publication date
BR8200046U (en) 2004-07-13
EP1326481B1 (en) 2005-01-12
CH696614A5 (en) 2007-08-15
DE60202586D1 (en) 2005-02-17
ES2234979T3 (en) 2005-07-01
DE60202586T8 (en) 2006-05-11
ATE287194T1 (en) 2005-01-15
EP1326481A2 (en) 2003-07-09
DE60202586T2 (en) 2005-12-29

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