ES474969A1 - Control circuit for flat-irons - Google Patents

Control circuit for flat-irons

Info

Publication number
ES474969A1
ES474969A1 ES474969A ES474969A ES474969A1 ES 474969 A1 ES474969 A1 ES 474969A1 ES 474969 A ES474969 A ES 474969A ES 474969 A ES474969 A ES 474969A ES 474969 A1 ES474969 A1 ES 474969A1
Authority
ES
Spain
Prior art keywords
current
supply
resistor
flat
control circuit
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.)
Expired
Application number
ES474969A
Other languages
Spanish (es)
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.)
Braun GmbH
Original Assignee
Braun GmbH
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 Braun GmbH filed Critical Braun GmbH
Publication of ES474969A1 publication Critical patent/ES474969A1/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/26—Temperature control or indicating arrangements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1909—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can only take two discrete values
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Textile Engineering (AREA)
  • Irons (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of Temperature (AREA)

Abstract

In an electrical control circuit for a flat-iron a sensing resistor 7 has a resistance which depends upon the temperature of the heating element 2 and the voltage drop across the resistor 7 is compared with a reference voltage adjustable for different required temperatures, to control the supply of current to the element 2. A current sensor 22 monitors current flow through resistor 7 and blocks the supply of current to the element 2 should the current flow be below a pre-set limit. The circuit may alternatively be arranged to block the supply of current to the element 2 if the sensing resistor current is above a pre-set limit or outside pre-set upper and lower limits. The means for detecting whether the monitored current is outside the specified limit(s) is a differential amplifier comprising two Darlington-connected pairs of transisors.
ES474969A 1977-11-11 1978-11-10 Control circuit for flat-irons Expired ES474969A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772750545 DE2750545A1 (en) 1977-11-11 1977-11-11 CONTROL CIRCUIT FOR IRON WITH A SENSOR RESISTANCE RESPECTIVE TO THE TEMPERATURE OF THE IRON HEATING

Publications (1)

Publication Number Publication Date
ES474969A1 true ES474969A1 (en) 1980-02-16

Family

ID=6023561

Family Applications (1)

Application Number Title Priority Date Filing Date
ES474969A Expired ES474969A1 (en) 1977-11-11 1978-11-10 Control circuit for flat-irons

Country Status (5)

Country Link
DE (1) DE2750545A1 (en)
ES (1) ES474969A1 (en)
FR (1) FR2408967A1 (en)
GB (1) GB2009973A (en)
NL (1) NL7811156A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686352B1 (en) * 1984-04-27 1993-12-14 Sunbeam Corporation Electronic pressing iron
US5595672A (en) * 1994-05-19 1997-01-21 Pentalpha Enterprises Ltd. Automatic power interrupting apparatus for an electric appliance
WO1996008082A1 (en) * 1994-09-07 1996-03-14 Pentalpha Enterprises Limited Automatic power interrupting apparatus for an electric appliance
DE19708867A1 (en) * 1997-03-05 1998-09-10 Bosch Gmbh Robert Circuit for temperature-dependent regulation of the heating current of seat heaters
WO2002026559A1 (en) * 2000-09-25 2002-04-04 The Bfgoodrich Company Drainmast with integral electronic temperature control
ES2402498B1 (en) * 2010-08-23 2014-04-07 Bsh Electrodomésticos España, S.A. ELECTRICAL IRONING DEVICE

Also Published As

Publication number Publication date
NL7811156A (en) 1979-05-15
FR2408967A1 (en) 1979-06-08
DE2750545A1 (en) 1979-05-17
GB2009973A (en) 1979-06-20

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