US3197884A - Control system for fabric drying apparatus - Google Patents

Control system for fabric drying apparatus Download PDF

Info

Publication number
US3197884A
US3197884A US96855A US9685561A US3197884A US 3197884 A US3197884 A US 3197884A US 96855 A US96855 A US 96855A US 9685561 A US9685561 A US 9685561A US 3197884 A US3197884 A US 3197884A
Authority
US
United States
Prior art keywords
contacts
circuit
relay
switch
line
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 - Lifetime
Application number
US96855A
Other languages
English (en)
Inventor
Thomas R Smith
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.)
Maytag Corp
Original Assignee
Maytag Corp
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
Priority to NL276024D priority Critical patent/NL276024A/xx
Application filed by Maytag Corp filed Critical Maytag Corp
Priority to US96855A priority patent/US3197884A/en
Priority to GB6715/62A priority patent/GB967779A/en
Priority to CH284862A priority patent/CH391645A/de
Priority to BE615325A priority patent/BE615325A/fr
Priority to DE19621485036 priority patent/DE1485036A1/de
Application granted granted Critical
Publication of US3197884A publication Critical patent/US3197884A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H03K17/288—Modifications for introducing a time delay before switching in tube switches
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C7/00—Heating or cooling textile fabrics
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • 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
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C2700/00—Finishing or decoration of textile materials, except for bleaching, dyeing, printing, mercerising, washing or fulling
    • D06C2700/09—Various apparatus for drying textiles
    • 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
    • D06F2105/62—Stopping or disabling machine operation

Definitions

  • This invention relates to a control system in a machine for drying fabrics, and more particularly, to a system for automatically controlling termination of drying and auxiliary operations.
  • FIGURE 1 is a View in vertical section, part-1y broken away, illustrating a drier which incorporates the control system of the invention
  • FIGURE 2 is a bottom view of one of the baflies shown in the drum of the drier in FIGURE 1, illustrating the location of the electrodes;
  • FIGURE 3 is a schematic diagram of a preferred circuit employing the principles of the control system of the present invention.
  • FIGURES 4 and 5 are tables illustrating the positions of the switch contacts of switch 95 in FIGURE 3 for various selected settings.
  • the invention relates to a fabric treating machine having a drying operation and auxiliary operation. Itis concerned with a control system in which conductors, electrodes, or probes, directly contact fabrics being dried, and control termination of the drying operationafter their electrical resistance, or conductivity, dependent upon their condition of dryness, exceeds a predetermined value for a predetermined time, as determined by a capacitance-resistance circuit, following which at least a portion of the capitance-resistance circuit is used to control the auxiliary operation.
  • FIGURE 1 of the accompanying drawings is shown a clothes drier having a base frame .10 which serves as a support for upstanding channel base members 11 and 12 which together with cross piece 14 support the hollow blower housing casting 17.
  • Housing 17 includes a tubular portion 21, a divider wall 20 having a rearwardly flared inner portion defining an intake into an impeller chamber, and radially directed longitudinal webs 22 which converge toward each other to provide a retainer member 23.
  • a passageway 26 is located between the tubular portion 21 and the bearing retainer member 23 which transverses the supporting webs 22.
  • a revoluble drum drive shaft 31 Journalled within member 23 is a revoluble drum drive shaft 31 which projects from both ends of the housing 17. Aflixed to drum drive shaft 31 at the rear of the cabinet is a large pulley 33 which is driven by motor 354 through motor pulley 36, main drive belt 37, a speed reduction system (not shown) and belt 40.
  • the opposite or forward end of the drum drive shaft 31 is rigidly connected to the drum spider member 46 which has radiating spokes 51 that support rim 52.
  • a heat resistant sealing member 54 encircles the front periphery of blower housing 17 and the circular shoulder 55 located on the rear portion of drum spider 46.
  • a horizontally mounted tumbling drum 60 has a rear wall 61 which is secured to rim 52 for support and rotation by shaft 31.
  • Rear drum wall 61 is imperforate except for a central exhaust opening 62.
  • rear wall 61 The periphery of rear wall 61 is flanged to form a supporting shoulder for the imperforate cylindrical side wall 65 which carries the clothes elevating vanes 66 for tumbling clothing within drum 60 during rotation of the latter member.
  • Cylindrical side wall 65 is connected to the front drum wall 67.
  • Front wall 67 has a centrally located access opening 68 and acircular perforate portion 69 located concentrically to access opening 68.
  • This perforate portion 69 formed by several concentric rows of holes, serves as the air intake into drum 60.
  • the cabinet 70 which is fastened to base frame 10 and which encloses the entire drying mechanism has an access opening 71 aligned to drum access opening 68 thereby allowing both of openings 68 and 71 to receive the door gasket 72.
  • the door 73 is hinged and forms an airtight seal with gasket 72.
  • shroud or cowling member 74 Fastened to cabinet 70 is the shroud or cowling member 74. Located between shroud 74 and the front drum wall 67 is an open coil electric heating element 75 which extends completely around the inside of cowling member 74 to raise the temperature of air passing through perforate portion 69 in the front drum wall 67. It will be understood that a gas heater may be used in place of the electrical element.
  • Air flow into drum 60 through the perforate area 69 and into the blower housing 17 is produced by rotation of the revoluble impeller member 76 located in blower housing 17.
  • Fan pulley 77 is connected to the driving motor 34 by main drive belt 37.
  • the blower housing casting 17 supports a cycling thermostat 78 which isconnected in series with the heating element 75 in order to maintain the interior of drum 60 at the proper selected drying temperature. In practice, this switch is set to open at approximately 135.
  • the high limit switch 79 which is mounted on an upper part of shroud member 74 so a to disconnect heating element 75 from its source of power in case the temperature near the front of the drum should rise above a predetermined selected temperature during the operation of the clothes drier, for instance, in the event of reduced air flow through drum 60.
  • electrodes or probes 80, 81 are mounted within the drum 60.
  • the electrodes are spirally Wound about each of the drum baffles 66 to provide a maximum amount of contacting or probing surfaces exposed to the fabrics placed within the drum.
  • the electrodes are preferably set in recesses or grooves in the bafiles to prevent shorting therebetween by metallic objects sometimes attached to the fabrics, for example, metal buttons, clips, buckles, and the like. It will be realized that different forms of electrodes, or probes, may be used, although the type disclosed herein is preferred.
  • Electrode 84 Electrical energy is supplied to electrode by lead 84 that is connected to brush 85 which engages the stationary slip ring 86 while the drum 60 is rotating.
  • the slip ring 86 may be supported on an electrically insulative band 87 mounted on housing 17.
  • Slip ring 86 is in turn connected to a lead 90 which runs to the control unit 92.
  • Electrode 81 may also be supplied with electrical energy of the opposite polarity to electrode 30 by lead 83 that may be connected to a similar arrangement of brushes and slip rings. It is preferred, however, to ground electrode 81'to the rotatable drum 60, so that it is supplied by current from lead 91 which is also grounded to the framework of the drier.
  • the automatic control unit 92 may be secured to the Leads 90, 91 enter the control unit and are connected to the control circuit to be described hereinafter.
  • baflles 56 are formed of electrically non-conductive material in order to insulate the electrodes. However, the electrodes are electrically shorted by contacting the wet fabrics during tumbling.
  • a plurality of bafiies 66 are mounted Within the drum 60, each of which is provided with electrodes -which may be selected by manual operation of a button (not shown) by the operator.
  • the button is mechanically linked (not shown) to the switch 95, so that by depression of a single button (not shown), marked for any of the ,foregoing settings, the switch contacts a through 1' are connected or disconnected as indicated by FIGURE 4 according to the legend of FIGURE 5. It should be clear that the switching arrangement may include other selections, as well as those indicated.
  • the drier drive motor is energized by a conventional 3-wire system.
  • the circuit is from power line L contacts g-h of switch 95, line 106, to one side of the motor 34.
  • the other side of the motor 34 is connected to power line N.
  • the motor 34 contains a centrifugal switch having a contact 101 which is closed when the motor reaches .a predetermined speed to connect power line L to one side of the heater 75.
  • the heater is connected to 220 volts A.C. between L and L by a circuit from L line 102, contacts n1-n of switch 95, line 103, thermostats 78 and '79 to one side I of the heater 75.
  • the other side of the heater 75 is connected to L through centrifugal switch 101.
  • the control circuit includes a sensing circuit for determining when the clothes are dry, or at a predetermined dampness, in order to initiate termination of the
  • the sensing circuit includes the conelement 112, and relay 113.
  • the relay 113 (shown de- .energized) has switch contacts 114, 115, 116 and 117.
  • the condenser 110 is charged by a circuit from power line L contacts g-h, line 106, line 107, relay switch contact 116, line 129, line 130, through half-wave rectifier 120, and resistor 121 to one side of the condenser 110.
  • the other side of the condenser is connected to power line N through resistor 122.
  • the resistors 121, 122 and condenser 110 are charged over a time period in accordance with well-known capacitance- .resistance principles.
  • the gaseous discharge tube 111 is connected in parallel to condenser 110 so that when the voltage charge on the condenser reaches a predetermined value the tube 111 is fired.
  • the firing of the gaseous tube tact 114- (in the position illustrated when the relay 113 is de-energized), relay 113 to power line N.
  • switch contact 114 When the relay 113 is operated, switch contact 114, is opened disconnecting the circuit to the light responsive element 112. Switch contact 115 is closed to complete a circuit to energize solenoid A. Switch contact 116 is opened to disconnect the condenser from the power line. The contact 117 is closed to complete a holding circuit to maintain the relay 113 energized.
  • the solenoid A is energized upon closing of switch contact either by a circuit from power line L contacts mn, line 103, thermostat 78, line 118, switch contact 115, line 126, line 127, contacts a-b to one side of the solenoid A or by a circuit from power line L contacts qr, line 90, line 118, switch contact 115, line 126, line 127, contacts ab to one side of the solenoid A.
  • the other side of the solenoid is connected to power line N.
  • the holding circuit for the relay 113 upon closing of relay switch contact 117 is from power line L contacts g-h, line 106, line 128, contacts c-d, line 129, relay switch contact 117 to one side of relay 113.
  • the other side of relay 113 is connected to power line N.
  • solenoid A When contacts ab and q-r of switch 95 are closed, solenoid A is connected to a circuit in order to energize solenoid A when the relay 113 is operated. Contacts ab and q-r are in series with contacts 115 of relay 113 as previously described.
  • the drier drive motor 34 and the sensing circuit are energized.
  • the circuit is from power line L through contacts g-h to line 106.
  • the drive motor 34 is connected on one side to line 106 and on the other side to power line N.
  • Line 106 is connected to line for supplying power to the light responsive element 112 and relay 113, so that when the gaseous discharge tube 111 fires the relay 113 will .be operated.
  • Line 106 is connected to line 107 for supplying power to the half-wave rectifier 120 through relay switch contact 116 and line in order to apply direct current to the condenser 110, as more fully explained hereinabove.
  • the condenser 110 When contacts i of switch 95 are momentarily closed, the condenser 110 is momentarily shorted to discharge any remaining voltage. By shorting the condenser at the start of an operation, the time period determined by the capacitance-resistance circuit will be the same for each operation.
  • the shorting circuit is from ground through contacts i to line 132 to one side of the condenser 110. The other side of the condenser is connected to ground through line 91.
  • the contacts of switch 95 are identical to that of the Regular Dry setting, except that contacts k-l are additionally closed. Contacts k-l place an additional resistor 134 in parallel to resistor 121. This reduces the effective resistance of the capacitance-resistance circuit. As a result condenser 110 is charged at a faster rate, and the sensing circuit operates to initiate termination of the drying operation while the fabrics within the drier are still damp. In this way, the drying operation is terminated so that the operator can remove the damp fabrics for ironing.
  • the contacts of switch 95 are operated as for the Regular Dry setting, except contacts m-n and -p remain open.
  • the Air Fluff setting is merely a timed period for tumbling the clothes without the heater energized. Therefore, the contacts m-n of the heater circuit remain open.
  • the circuit employing the electrodes 80, 81 also remains open through contacts o-p, since the condition of fabrics is not utilized in determining the duration of the operation.
  • auxiliary operation it is often desirable to perform an auxiliary operation following the drying operation.
  • Other auxiliary operations may be utilized.
  • the present invention employs the capacitance-resistance circuit for timing the auxiliary operation.
  • the condenser is charged to a point which fires the gaseous discharge tube 111. This reduces the resistance of light responsive element 112 to operate relay 113.
  • the solenoid A is closed. As indicated by the table of FIGURE 4, when solenoid A is energized, it opens all of the switch contacts of switch 95 except e-f, g-h, and q-r.
  • solenoid A initiates the auxiliary operation, and terminates the drying operation by disconnecting heater 75.
  • Contacts e-f are closed during the auxiliary operation to place the solenoid B in series with relay switch contact 115.
  • the circuit is from relay switch contact 115, line 126, line 140, contacts e-f, line 131, to one side of solenoid B.
  • the other side of solenoid B is connected to power line N. It will be realized that when relay switch contact 115 is closed, 115 volts is applied from line 118, in order to energize the solenoid B.
  • switch contacts g-h of switch 95 energize the drier drive motor 34 and also the circuit which energizes condenser 110 through resistors 121, 122, and half-wave rectifier 120.
  • the relay 113 being deenergized at the beginning of the auxiliary operation, the condenser is again charged over a time period determined by capacitance-resistance principles until the gaseous discharge tube 111 fires to illuminate light responsive element 112 and operate the relay 113. In this way, the capacitance-resistance circuit is utilized to time the auxiliary operation.
  • the capacitance-resistance circuit including condenser 110, operates in accordance with well known principles to time a predetermined period of operation, Without reference to the dryness of the fabrics since the circuit to the probes 8t), 81 is disconnected.
  • the capacitance-resistance circuit is employed during the drying operation to determine the con dition of the fabrics, and to initiate the termination of the drying operation.
  • the capacitance-resistance circuit is utilized to measure a predetermined time period for determining the duration of the auxiliary operation.
  • the operator opens the door 73 of the drier and inserts fabrics in the drum 60.
  • the operator sets the button (not shown) 'at the desired selection, for example, Regular Dry position.
  • the drive motor 34 is then energized to rotate the drum 60 to tumblethe clothes by bafile 66. After a certain rotational speed is achieved by the drive motor 34, switch 101 is centrifugally operated to close the circuit to heater 75.
  • the drying operation continues.
  • the condenser 110 is charged by the half-wave rectifier through resistors 121, 122, and is discharged by the damp fabrics shorting the condenser 110 through electrodes 80, 81.
  • the charge on the condenser 110 accumulates.
  • the gaseous discharge tube 111 fires, the light responsive element 112 is illuminated, and its resistance reduced, to complete the circuit to relay 113.
  • the relay 113 When the relay 113 is energized it is maintained energized by the holding circuit through relay contact 117. Energization of the relay 113 also operates the solenoid A through the relay switch contact 115. When solenoid A is energized, it operates to discontinue the drying operation and initiate the auxiliary operation.
  • the gaseous discharge tube 111 is designed to fire at approximately 72 volts.
  • the capacitanceresistance circuit is designed so that it takes about 7 to 8 minutes to charge the capacitance to an amount suificient to fire the tube 111, apart from the discharge time through electrodes 80, 81.
  • the drying time period therefore, will be greater than 7 to 8 minutes duration.
  • the auxiliary operation will be 7 to 8 minutes, or less depending on the residual charge of condenser 110 following the rying period.
  • a fabric conditioning machine having a chamber for containing fabrics and heating means for drying fabrics in said chamber, means for operating said machine through a first operation in which said heating means is energized, means for operating said machine through an auxiliary operation in which said heating means is deenergized, and circuit means including charging resistor means and condenser means for timing at least a portion of said auxiliary operation.
  • a fabric conditioning machine having a chamher for containing fabrics and heating means for dry ing fabrics in said chamber during a first operation, means for operating said machine through an auxiliary operation following said first operation, and circuit means including charging resistor means and charging capacitor means for timing at least a portion of said auxiliary operation.
  • a fabric conditioning machine having a drying operation and at least one sequential operation comprising, means for initiating said sequential operation, timing circuit means having charging capacitor means for regulating at least a portion of the period of at least one of said sequential operations, and means for charging said capacitor means over a timed period after initiating said sequential operation.
  • a fabric conditioning machine having heating means for drying articles, means for initiating a first operation in which said heating means is energized for a 8 time period under the control of a circuit containing resistor means and condenser means in series, means for initiating a second operation in which said heating means is deenergized, and means for timing at least a portion of said second operation under the control of said resistor means and condenser means.
  • a fabric conditioning machine having a chamber for containing fabrics and operable through a plurality of selectable operations including a drying operation and an auxiliary operation
  • first selectable means for initiating said drying operation first termination means for automatically initiating termination of said drying operation in response to a predetermined degree of dryness of the fabrics
  • second selectable means for initiating said auxiliary operation means for substituting a second termination means in place of said first termination means for said auxiliary operation
  • timing means including capacitance means for maintaining the duration of said auxiliary operation over a fixed period, and means for gradually charging said capacitance means to a predetermined charge
  • said second termination means being responsive to said predetermined charge on said capacitance means for terminating said auxiliary operation.
  • a fabric conditioning machine having a chamber for containing fabrics and operable through a plurality of operations including a drying operation and an auxiliary operation
  • first means for initiating said drying operation first termination means for automatically initiating termination of said drying operation in response to a predetermined degree of dryness of the fabrics including capacitance means
  • second means for initiating said auxiliary operation means for substituting a second termination means in place of said first termination means for said auxiliary operation
  • timing means including said capacitance means for maintaining the duration of said auxiliary operation over a timed period of predetermined length, and means for gradually charging said capacitance means to a predetermined charge
  • said second termination means being responsive to said predetermined charge on said capacitance means for terminating said auxiliary operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Drying Of Solid Materials (AREA)
US96855A 1961-03-20 1961-03-20 Control system for fabric drying apparatus Expired - Lifetime US3197884A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL276024D NL276024A (fr) 1961-03-20
US96855A US3197884A (en) 1961-03-20 1961-03-20 Control system for fabric drying apparatus
GB6715/62A GB967779A (en) 1961-03-20 1962-02-21 Fabric conditioning machine
CH284862A CH391645A (de) 1961-03-20 1962-03-09 Steuervorrichtung an Behandlungsapparat für Gewebe
BE615325A BE615325A (fr) 1961-03-20 1962-03-20 Système de règlage destiné à un appareil de traitement d'étoffes
DE19621485036 DE1485036A1 (de) 1961-03-20 1962-03-20 Vorrichtung zum Konditionieren von Stoffen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US96855A US3197884A (en) 1961-03-20 1961-03-20 Control system for fabric drying apparatus

Publications (1)

Publication Number Publication Date
US3197884A true US3197884A (en) 1965-08-03

Family

ID=22259412

Family Applications (1)

Application Number Title Priority Date Filing Date
US96855A Expired - Lifetime US3197884A (en) 1961-03-20 1961-03-20 Control system for fabric drying apparatus

Country Status (6)

Country Link
US (1) US3197884A (fr)
BE (1) BE615325A (fr)
CH (1) CH391645A (fr)
DE (1) DE1485036A1 (fr)
GB (1) GB967779A (fr)
NL (1) NL276024A (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3266167A (en) * 1963-04-05 1966-08-16 Texas Instruments Inc Dryer control
US3269026A (en) * 1964-01-13 1966-08-30 Controls Co Of America Dryer control
US3271878A (en) * 1963-10-14 1966-09-13 Controls Co Of America Moisture sensing control
US3284919A (en) * 1964-02-28 1966-11-15 Whirlpool Co Dryness control for dryer
US3286359A (en) * 1964-06-08 1966-11-22 Whirlpool Co Anti-wrinkle cycle for dryers
US3304621A (en) * 1965-10-22 1967-02-21 Essex Wire Corp Dryer control system
US3324568A (en) * 1964-12-21 1967-06-13 Essex Wire Corp Electronic dryness control
US3330047A (en) * 1964-06-10 1967-07-11 Ranco Inc Dryer control
US3364585A (en) * 1965-06-07 1968-01-23 Gen Motors Corp Dryer sprinkle system
US3365810A (en) * 1966-07-07 1968-01-30 Whirlpool Co Variable speed tumbling dryer
US3417480A (en) * 1965-10-14 1968-12-24 Westinghouse Electric Corp Domestic appliance with control means
US4530372A (en) * 1982-09-09 1985-07-23 Conoco Inc. Liquid level controller
US20050202999A1 (en) * 2004-02-27 2005-09-15 Woo Rick A. Multiple use fabric conditioning block with indentations
US20080210769A1 (en) * 2006-10-09 2008-09-04 Lg Electronics Inc. Heating system, drying machine having the heating system, and method of controlling the heating system
US20090241363A1 (en) * 2006-06-29 2009-10-01 Bsh Bosch Und Siemens Hausgeraete Gmbh Dryer With Reduced Noise Generation, Fan and Impeller Suitable Therefor, and Method for Producing The impeller
US20110119951A1 (en) * 2002-12-20 2011-05-26 Bsh Bosch Und Siemens Hausgerate Gmbh Device for determining the conductance of laundry, dryers and method for preventing deposits on electrodes

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756224C3 (de) * 1977-12-16 1981-08-27 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Schaltungsanordnung zum Feststellen der in einem Wäscheposten enthaltenen Restfeuchtigkeit
DE3343179C1 (de) * 1983-11-29 1985-10-10 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Waeschetrockner
CN113524900B (zh) * 2021-07-14 2022-09-13 江苏瑞彩包装有限公司 一种绿色环保uv印刷系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875359A (en) * 1932-09-06 And matthew exbbidge dun
US2045381A (en) * 1931-08-13 1936-06-23 American Laundry Mach Co Control system
US2807889A (en) * 1956-03-08 1957-10-01 Gen Electric Control system for clothes dryers
US2812491A (en) * 1957-01-11 1957-11-05 American Cyanamid Co Electrical tester for non-metallic linings
US2838719A (en) * 1955-12-28 1958-06-10 Marconi Co Canada Photocell circuit control arrangement
US3021605A (en) * 1957-07-19 1962-02-20 Hamilton Mfg Co Heater system
US3044181A (en) * 1958-10-20 1962-07-17 Philco Corp Heater control in laundry apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875359A (en) * 1932-09-06 And matthew exbbidge dun
US2045381A (en) * 1931-08-13 1936-06-23 American Laundry Mach Co Control system
US2838719A (en) * 1955-12-28 1958-06-10 Marconi Co Canada Photocell circuit control arrangement
US2807889A (en) * 1956-03-08 1957-10-01 Gen Electric Control system for clothes dryers
US2812491A (en) * 1957-01-11 1957-11-05 American Cyanamid Co Electrical tester for non-metallic linings
US3021605A (en) * 1957-07-19 1962-02-20 Hamilton Mfg Co Heater system
US3044181A (en) * 1958-10-20 1962-07-17 Philco Corp Heater control in laundry apparatus

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3266167A (en) * 1963-04-05 1966-08-16 Texas Instruments Inc Dryer control
US3271878A (en) * 1963-10-14 1966-09-13 Controls Co Of America Moisture sensing control
US3269026A (en) * 1964-01-13 1966-08-30 Controls Co Of America Dryer control
US3284919A (en) * 1964-02-28 1966-11-15 Whirlpool Co Dryness control for dryer
US3286359A (en) * 1964-06-08 1966-11-22 Whirlpool Co Anti-wrinkle cycle for dryers
US3330047A (en) * 1964-06-10 1967-07-11 Ranco Inc Dryer control
US3324568A (en) * 1964-12-21 1967-06-13 Essex Wire Corp Electronic dryness control
US3364585A (en) * 1965-06-07 1968-01-23 Gen Motors Corp Dryer sprinkle system
US3417480A (en) * 1965-10-14 1968-12-24 Westinghouse Electric Corp Domestic appliance with control means
US3304621A (en) * 1965-10-22 1967-02-21 Essex Wire Corp Dryer control system
US3365810A (en) * 1966-07-07 1968-01-30 Whirlpool Co Variable speed tumbling dryer
US4530372A (en) * 1982-09-09 1985-07-23 Conoco Inc. Liquid level controller
US20110119951A1 (en) * 2002-12-20 2011-05-26 Bsh Bosch Und Siemens Hausgerate Gmbh Device for determining the conductance of laundry, dryers and method for preventing deposits on electrodes
US7975400B2 (en) * 2002-12-20 2011-07-12 Bsh Bosch Und Siemens Hausgeraete Gmbh Device for determining the conductance of laundry, dryers and method for preventing deposits on electrodes
US8286369B2 (en) 2002-12-20 2012-10-16 Bsh Bosch Und Siemens Hausgeraete Gmbh Device for determining the conductance of laundry, dryers and method for preventing deposits on electrodes
US20050202999A1 (en) * 2004-02-27 2005-09-15 Woo Rick A. Multiple use fabric conditioning block with indentations
US7977303B2 (en) 2004-02-27 2011-07-12 The Procter & Gamble Company Multiple use fabric conditioning block with indentations
US7980001B2 (en) * 2004-02-27 2011-07-19 The Procter & Gamble Company Fabric conditioning dispenser and methods of use
US20090241363A1 (en) * 2006-06-29 2009-10-01 Bsh Bosch Und Siemens Hausgeraete Gmbh Dryer With Reduced Noise Generation, Fan and Impeller Suitable Therefor, and Method for Producing The impeller
US8051578B2 (en) * 2006-06-29 2011-11-08 Bsh Bosch Und Siemens Hausgeraete Gmbh Reduced noise dryer fan and impeller and producing method thereof
US20080210769A1 (en) * 2006-10-09 2008-09-04 Lg Electronics Inc. Heating system, drying machine having the heating system, and method of controlling the heating system
US8042284B2 (en) * 2006-10-09 2011-10-25 Lg Electronics Inc. Heating system, drying machine having the heating system, and method of controlling the heating system

Also Published As

Publication number Publication date
BE615325A (fr) 1962-07-16
NL276024A (fr)
GB967779A (en) 1964-08-26
DE1485036A1 (de) 1969-04-03
CH391645A (de) 1965-05-15

Similar Documents

Publication Publication Date Title
US3197884A (en) Control system for fabric drying apparatus
US3942265A (en) Dryer control arrangement
US3180038A (en) Automatic dryer control circuit
US2851789A (en) Control system for clothes dryers
US3409994A (en) Heating control system for clothes dryer
US3733712A (en) Clothes drier having moisture sensing control
US3599342A (en) Dryer control
US3028680A (en) Method and apparatus for controlling laundry dryers
US3417480A (en) Domestic appliance with control means
US2851790A (en) Temperature control means for clothes dryer
US3200511A (en) Drier control
US2743532A (en) Clothes drier automatic control circuit
US3221417A (en) Moisture sensor control device for a laundry drier
US3651579A (en) Drier control
US3782001A (en) Clothes dryer control
US3647196A (en) Dryer control system
US3333345A (en) Domestic appliance control probe
US3404466A (en) Electronic dryer control
US3248799A (en) Automatic dryer control circuit
US3613254A (en) Drier control
US3229379A (en) Control system for fabric dryer
US3613253A (en) Drier control
US3621293A (en) Electronic dryer control
US3197885A (en) Control device for driers
US2796679A (en) Autoamtic clothes dryer control