GB982992A - Improvements in and relating to apparatus for sensing moisture - Google Patents

Improvements in and relating to apparatus for sensing moisture

Info

Publication number
GB982992A
GB982992A GB17967/61A GB1796761A GB982992A GB 982992 A GB982992 A GB 982992A GB 17967/61 A GB17967/61 A GB 17967/61A GB 1796761 A GB1796761 A GB 1796761A GB 982992 A GB982992 A GB 982992A
Authority
GB
United Kingdom
Prior art keywords
capacitor
electrodes
relay
switched
resistors
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
GB17967/61A
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.)
Controls Company of America
Original Assignee
Controls Company of America
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 Controls Company of America filed Critical Controls Company of America
Publication of GB982992A publication Critical patent/GB982992A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or weight
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D22/00—Control of humidity
    • G05D22/02—Control of humidity characterised by the use of electric means
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/08—Humidity
    • D06F2103/10—Humidity expressed as capacitance or resistance
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Cleaning And Drying Hair (AREA)

Abstract

982,992. Determining moisture content. CONTROLS CO. OF AMERICA. May 17, 1961 [May 26, 1960; July 26, 1960], No. 17967/61. Heading G1N. In a laundry drier the voltage drop across electrodes 66, 64 which are supplied with rectified A.C. through a resistor 48, rises as the clothes dry to trigger a switching diode 40 and effect energization of a relay B which opens the control circuit established by relay A in response to the momentary closing of switch 10 and interrupts drying. Push button insertable resistors 50, 52, 54, 56, 58, provide for obtaining different degrees of dryness and a capacitor 74 prevents false operation by momentary interruption of the circuit between the electrodes. A high value resistor may be connected in series with the electrodes to ensure eventual shut down when the wetness control resistors are cleared; and a second capacitor may be provided to be switched in parallel with capacitor 74 to provide further protection against false operation with small loads in the dryer. Alternative control by a timing circuit comprising a capacitor switched in place of the drum electrodes is described for controlling fluffing. Hot air may be blown through.
GB17967/61A 1960-05-26 1961-05-17 Improvements in and relating to apparatus for sensing moisture Expired GB982992A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3192260A 1960-05-26 1960-05-26
US4532960A 1960-07-26 1960-07-26

Publications (1)

Publication Number Publication Date
GB982992A true GB982992A (en) 1965-02-10

Family

ID=26707772

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17967/61A Expired GB982992A (en) 1960-05-26 1961-05-17 Improvements in and relating to apparatus for sensing moisture

Country Status (2)

Country Link
DE (1) DE1448109C3 (en)
GB (1) GB982992A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1763659A1 (en) * 1968-07-11 1972-05-04 Holzer Patent Ag Control device for the degree of drying dependent control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1763659A1 (en) * 1968-07-11 1972-05-04 Holzer Patent Ag Control device for the degree of drying dependent control

Also Published As

Publication number Publication date
DE1448109A1 (en) 1970-12-10
DE1448109B2 (en) 1973-02-08
DE1448109C3 (en) 1973-10-25

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