US3388566A - Washing machine - Google Patents

Washing machine Download PDF

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Publication number
US3388566A
US3388566A US673522A US67352267A US3388566A US 3388566 A US3388566 A US 3388566A US 673522 A US673522 A US 673522A US 67352267 A US67352267 A US 67352267A US 3388566 A US3388566 A US 3388566A
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Prior art keywords
resistor
circuit
washing
switch
voltage
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Expired - Lifetime
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US673522A
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English (en)
Inventor
Kaper Arjen
Verdenius Peter
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US Philips Corp
North American Philips Co Inc
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US Philips Corp
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Priority claimed from NL6501560A external-priority patent/NL6501560A/xx
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    • 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
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/07—Programme control other than numerical control, i.e. in sequence controllers or logic controllers where the programme is defined in the fixed connection of electrical elements, e.g. potentiometers, counters, transistors
    • 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
    • D06F34/06—Timing arrangements
    • 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
    • D06F34/08—Control circuits or arrangements thereof

Definitions

  • a washing machine program controller including means for automatically switching the machine into the rinse cycle upon completion ofthe wash cycle.
  • This invention relation to automatic washing machines, and more particularly to a Washing machine program c'ontrol'ler including a first time circuit which determines the number of rinsing cycles to be performed by the washing machine, la second time circuit which detenmine's the periods of washing and rinsing Within a washing cycle and a rinsing cycle, respectively, and a temperature controlled switching circuit which is coupled to the second time circuit.
  • washing machine of the above mentioned kind constitutes the subject matter of two prior patent applications.
  • the change from the washing cycle to 'the rinsing cycles is initiated by manipulations from without, that is to say, lthe manual operation ⁇ of -a plurality of switches.
  • An object of the present invention is, inter alia, to change from the washing cylces to the rinsing cycles automatically.
  • the invention is characterized in that, upon starting the wlashing programme of the washing machine, Iatt least one switch is energized by which a capacitor of ⁇ a first .time circuit is connected to a direct voltage supply; This time circuit closes a switch in series with the mechanism tor filling the washing machine.
  • the direct voltage supply of the capacitor is interrupted so that the switch in series with the filling mechanism switches-ofi after a delay period which is determined by the first time circuit.
  • a further switch in Vseries with filling mechanism interrupts the voltage ysupply of the filling mechanism :and establishes .the connection of the drain pump to the voltage supply, which then empties 4the washing tub.
  • a switch forms part lof a voltage divider which provides the direct supply voltage for the temperatu-recontrolled switching circuit in such manner that in the die-energized condition of lthis switch, the output current of the switching circuit is interrupted, thus causing interruption of the connection of a timing capacitor in the input circuit of the second Itime cir-cuit to the direct voltage supply.
  • FIGURE l shows a first embodiment of a circuit diagram of a washing mach-ine according to the invention
  • FIGURE 2 shows a first variant of the diagram of FIGURE l
  • FIGURE 3 shows a second variant thereof.
  • the circuit arrangement 0f la washing machine comprises, inter alia, the time cir cuits 48 and 88, .a temperature-controlled switching circuit 65, a washing motor 10 yand an auxiliary motor 17, and .a heating element 8.
  • the arrangement also includes la level contr-o1 19, 'a fill-up valve 3 and a pump 26.
  • the switches present in the circuit arrangement are in part of the -opto-electronic type and in part of the electromechanical type. Subsequent manipulations are initiated by varying the position of one yor more switches.
  • a voltage source 1 ' is connected through Ia switch 2 to the washing machine.
  • the time circuits 48 and 88 lare energized.
  • the output current from the time circuit 88 is negligible since the electrodes of an npn-type transistor 95 are so polarized that Ithis transistor is conducting.
  • a relay coil 99 then conveys 'a negligible current and a bipolar switch 21, 82 occupies the position 'shown tin tull line.
  • the pump 26 is operating and empties -the Washing tub, if filled. After lthe tub has been pumped empty, a switch 164 in the level control 19 occupies the position in which contacts 31 and 32 are bridged.
  • a photosensitive resistor 45 which is likewise illuminated by the light source 23, also becomes low-ohmic s0 that a capacitor 46 in the input circuit of the time circuit 48 is charged.
  • the capacitor 46 has been charged to lan extent such that the base voltage of an npn-type transistor 52 exceeds the emitter voltage, the transistor 52 becomes conductive 'and 'an npntype transistor 57 is cuteofi. Consequently the current fiowing'through a relay coil 62 increases .and the relay Contact 20 assumes the position shown in FIG. l in brok-en line ⁇
  • the ll-up valve 3 is energized via relay contacts 20 and 21 and the washing tub is filled.
  • the switch 164 in the level control 19 is changed from the position at which lthe contacts 31 and 32 are bridged to the position at which the contacts 31 and L are bridged.
  • a heating coil 8 4 is energized now and the contents of the washin g tub lare heated.
  • a light lsource 4 connected in parallel with the coil 8, illuminates a photosensitive resistor 61 so that the relay coil 62 in the output circuit of the time switch 48 is short-circuited by the series-combination of the low-ohmic photosensitive resistors 60 and 61.
  • the resistor 60 is illuminated by the light Isource 23.
  • the switch 20 4 returns to the position shown in full line and the process of filling the washing tub stops
  • a light source 7, which also is connected in parallel with .the coil 8, illuminates a photosensitive resistor 18 in series with the lauxiliary motor 17.
  • This motor on the one hand, switches the energization for the washing motor on and oi (-by means of la switch 16) and, on the other hand, determines the direction of rotation of the washing motor (by means of a switch By means of the optical coupling of the light source 7 and the photosensitive resistor 18, it is thus ensured that the washing motor 10 is energized in the desired manner during the period in which the contents of the washing tub are heated.
  • a temperature-sensitive resistor 66 of negative temperature coetiicient forms part of a voltage divider which determines the base voltage of a pnp-type transistor 75. At the desired temperature of the water, resistor 66 assumes a value such that the base voltage exceeds the emitter voltage and the transistor 75 changes from the conducting condition to the cut-ott condition. The temperature at which this happens can be controlled by adjusting switch 64 to include one of the four resistors 67 to 70 into the voltage divider in series with a photosensitive resistor 72.
  • a capacitor 87 which has previously been charged through a resistor 79 and the diode 80, is charged through transistor 75 and a diode 76.
  • the transistor 75 is cut-olf and the process of charging capacitor 87 stops.
  • the so-called washing period now begins. It is determined by the RC time constant of the parallel combination of a resistor 86 and the capacitor 87.
  • the base potential of the transistor 90 has decreased to an extent such that this transistor is cut-ott.
  • the transistor 95 becomes conducting -and the relay coil 99 becomes substantially idle.
  • the switch 21 assumes the position shown in full line. This has two consequences.
  • the pump motor 26 becomes operative again so that the washing tub is pumped empty.
  • the light source 23 is short circuited. This primarily causes the photosensitive resistor 45 to become high-Ohmic so that the capacitor 46 in the input circuit of the time circuit 43 is no longer charged and it slowly begins to discharge through the resistor 47. Furthermore, the photosensitive resistor 60y in the output circuit of the time circuit 48 also becomes high-ohmic so that the relay coil 62, which is connected in parallel with the seriescombination of the photosensitive resistors 60 and 61, becomes conducting and the switch assumes the position shown in broken line. Lastly, the photosensitive resistor 24 becomes high-ohmic so that the light source 23 cannot be ignited until the start lknob 22 is pushed again.
  • the level switch 19 changes over to the position in which the contacts 31 and 32 are connected.
  • the capacitor 87 in the input circuit of the time circuit 88 is then charged through the diode 80 and a resistor 85.
  • the transmitter 90 becomes conducting. Consequently the transistor 95 cuts-oif so that the current iowing through the relay coil 99 increases and the switches 21 and 82 assume the positions shown in broken lines.
  • the iill-up valve 3 is now connected through the closed switch 20 and the switch 21, in the position shown in broken line, to the Voltage source 1.
  • the washing tub is refilled to the level at which the level control 19 bridges contacts H and 33.
  • the photosensitive resistor 61 becomes low-ohmic due to the ignition of the light source 4, but the photosensitive resistor 69, which is connected in series with the resistor 61, is still high-ohmic so that the relay coil 62 continues to carry current. It is only when the level of the liquid is so high that the level control 19 bridges the contacts 33 and H that the relay coil 62 is short-circuited and it becomes idle.
  • the switch 20 assumes the position shown in full line and the filling process stops.
  • the light source 7, which illuminates a photosensitive resistor 18, has already been ignited before, namely when the contacts 31 and L of the switch 164 in the level control 19 are bridged. Consequently, the rotation of the washing motor 10 is initiated, as has been described above and in the now abandoned prior application Ser. No. 417,115, namelyd Dec. 9, 1964.
  • the process of charging the capacitor 87 in the input circuit of the time circuit 88 stops.
  • the first charging path via the diode is interrupted due to the breaking of the contacts 31, 32 in the level control 19.
  • the second charging path through the transistor 75 is not opened since the photosensitive resistor 72 is high-ohmic and hence the transistor 75 is cut-ofi.
  • the photosensitive resistor 72 is in optical contact with the light source 23, which has been short circuited.
  • the capacitor 87 begins to discharge as soon as the level control 19 interrupts the connection between the contacts 31 and 32 and closes that between the contacts 31 and L, that is before the water of the washing tub has reached the high rinsing level H.
  • the capacitor 87 has discharged to an extent such that ⁇ the base potential of transistor 90 has decreased below the emitter potential, the transistor 90 begins to cut-oit, the transistor 95 becomes conducting and the current flowing through the relay coil 99 becomes negligible.
  • the switches 21 and 82 assume the positions shown in full lines.
  • the pump 26 begins to pump out the washing tub.
  • the described cycle of pumping, filling, Washing (rinsing), pumping out is repeated.
  • the number of times that the rinsing cycle is repeated is determined by the period of discharge of the capacitor 46 in the input circuit of the time circuit 48. In fact, when the capacitor 46 has discharged to such an extent that the base voltage of transistor 52 has decreased below the emitter voltage, the transistor 52 changes to the cut-oit condition and the transistor 57 to the conducting condition. The current owing through the relay coil 62 becomes negligible, even if one of the photosensitive resistors 60 and 61 is high-ohmic. The switch 20 assumes the position shown in full line. The till-up valve 3 can no longer be energized so that the rinsing process is stopped.
  • the light source 4 can no longer be ignited and the photosensitive resistor 61 invariably remains highohmic.
  • the washing tub is then iilled to the high level H, not only during the rinsing cycles, but also during the washing cycles.
  • FIGURE 2 A simplified form of the circuit arrangement of FIG- URE 1 is shown in FIGURE 2. In both figures the same reference numerals are used for corresponding elements. Only the modified portion of the circuit arrangement of FIGURE 1 is shown in FIGURE 2.
  • the light source 23 in the diagram of FIGURE 2 is connected in series with the temperature-controlled switching circuit 65. After the washing tub has been pumped out by the pump 26, a starting knob 122 is pushed. Contacts 183 and 184, as Well as contacts 128 and 129, are bridged. On the one hand, the capacitor 87 is now rapidly charged through a resistor 101 and the switch 82 so that the switches S2 and 2l, are changed-over alter a short time to the positions shown in broken lines.
  • the light source 23 which is in optical contact with the photosensitive resistor 72, is energized. It is advantageous to connect a resistor 102 in parallel with the light source 23 in order to obtain a voltage divider having an internal resistance which is not unduly high.
  • the switches 21, 82 When, at the end of the washing cycle, the switches 21, 82, as Well as the switch 164 in the level control 19, occupy the positions shown in full lines the light source 23 is extinguished.
  • the resistor 72 then is high-ohmic and the capacitor 87, in the input circuit of the time circuit 88, can be charged during pumping only through a resistor 100, whereafter the rst rinsing cycle begins.
  • the resistor 100 is preferably given a value which is considerably higher than that of the resistor 101 so that the maximum voltage across capacitor 87 is considerably lower at the beginning of a rinsing cycle than at the beginning of the washing cycle.
  • the capacitor 87 is therefore discharged during a rinsing cycle within a time period which is shorter than the time of discharge during the washing cycle. Consequently, the rinsing time during a rinsing cycle is shorter than the washing time during the Washing cycle. This is found to be advantageous in the practice of washing.
  • FIGURE 3 shows a second variant of the circuit diagram of FIGURE 1. The most marked differences between the two diagrams are:
  • the relay 62 in the output circuit of the time circuit 48 is influenced by the variation in the impedance of the series-combination of the photosensitive resistor 61, illuminated by the light source 4, and the photosensitve resistor 60, illuminated by the light source 23.
  • the series-combination of photosensitive resistors 160 and 161 is included in the input circuit of the time circuit 48 and thus directly between the base of transistor 52 and the terminal oi negative voltage. Wherrboth resistors are illuminated, namely resistor 161 by the light source 7 and resistor 160 by a light source 123, the base of transistor 52 has substantially the negative terminal voltage. The transistor 52 is cut-ott, the transistor 57 is conducting and the relay coil 62 does not convey'current. A similar result was obtained in the circuit of FIGURE l. l 1
  • the series-combination has no influence on the condition of transistor 52 and hence no influence on the condition of the relay coil 62.
  • This also is comparable to the diagram of FIGURE 1, where the relay coil 62 is not ir1- tluenced by the series-combination of the resistors 60 and 61 if one of these resistors is not illuminated and hence is high-ohmic.
  • a photosensitive resistor 145 is included in parallel with the photosensitive resistor 45 in the input circuit of the time switch y48, a photosensitive resistor 260 is included in parallel with the photosensitive resistor 160, and a photosensitive resistor 172 is included in a parallel branch of the series-combination comprising the photosensitive resistor 72 and one of the resistors 67 to 70.
  • the pre-washing process is initiated by pushing a knob 122 so that a light source 220 is energized and illuminates the photosensitive resistors 145, 218, 260 and 172.
  • the pre-washing cycle proceeds similarly to the Washing cycle in the diagram of FIGURE l.
  • the pre-Washing temperature is determined by the resistor 69 included, in series with the photosensitive resistor 172, in the voltage divider which determines the base potential of the transistor 75.
  • the washing time which is determined by the values of resistor 86 and capacitor 87, begins immediately after filling.
  • the ignition of the lamp 123 which illuminates the photosensiti-ve resistors 45, 216, 160 and 72, initiates the washing cycle.
  • the switch 64 then occupies a position at which that end of one of the resistors 67 to 70 which is remote from the base of transistor is connected to the photosensitive resistor 72.
  • the switch 164 in the level control 19 again assumes the position in which the contacts 31 and 32 are bridged.
  • a voltage pulse is then applied through the resistor 209 and the capacitor 210 to the anode of a gas-discharge lamp 217 since the resistor 218 is high-ohmic and the photosensitive resistor 216, which is illuminated by the gas-discharge lamp 123, is low-ohmic.
  • the gas-discharge'lamp 217 is ignited. rI ⁇ he lamp 123 extinguishes due to the increased Voltage drop across the resistor 215.
  • the resistors 45, 160, 216 and 72 become high-ohmic.
  • the first rinsing cycle starts. The rinsing process is similar to that described with reference to the diagram of FIGURE l.
  • a switch 233 is open, the switch 116, which is operated by the auxiliary motor 17 through a cam disc, determines the duration in which during one period of rotation in the counterclockwise direction, standstill, rotation in the clockwise direction, the washing motor actually rotates in the counterclockwise direction and the clockwise direction, respectively.
  • the relay coil 62 is coupled to a second switch 206. l the coil conveys current, and hence the switch 20 occupies the position shown in broken line, a resistor 205 is connected in parallel with resistor 53 through the switch 266.
  • the resistor 58 is a common emitter resistor for the transistors 52 and 57. Bridging of the resistor 58 means that the emitter voltage of transistor 52 is decreased. The transistor 52 thus remains conducting during the short time in which the washing tub is filled. The voltage across the discharging capacitor 46 decreases to a lesser extent than does the potential of the emitter of transistor 52 due to the bridging of the emitter resistor. The process of filling the washing tub is completed.
  • the relay coil 62 is short-circuited by the switch 53, not only the switch 20, but also the switch 206, reassume their back positions. The emitter voltage of transistor 52 is restored to its initial value.
  • the novel program controller comprises a rst timing circuit 48 which controls the number of rinse cycles in the program, a second timing circuit 88 that controls the duration of a washing or rinsing period within a washing or rinsing cycle, and a temperature controlled switching circuit 65, including water temperature sensing means 66, that couples the supply voltage to the timing means 87 of the second timing circuit.
  • the second timing circuit controls the washer drain pump 26.
  • the controller also comprises first switching means including switches 2 and 22 for coupling the supply voltage to the controller.
  • a second switching means comprising photosensitive resistor-45 responds to the actuation of the first switching means to actuate the first timing circuit 48.
  • the first timing circuit controls a first switch 20 in series with a water intake valve 3 and the voltage source so as to close same at given intervals. Whenever the Washer water reaches a given level, the water level sensing means 164 effectively couples the voltage source to the washer heating means 8 and to the motor energizing means including photo-resistor 18 and auxiliary motor 17.
  • a lamp 23 optically coupled to photosensitive resistors 72 and 45 provides a means responsive to the condition of the second timing circuit for inhibiting further operation of the switching circuit 65 at the end of the washng cycle while simultaneously controlling the second switching means 45 to initiate the timing of the rinsing cycle.
  • the rinsing cycle is determined by the first timing means comprising capacitor 46 and resistor 47.
  • a program controller for cycling the operation of a washing machine comprising, a source of supply voltage, a first timing circuit coupled to said voltage source and including a capacitor for timing the rinse cycles in the program, a second timing circuit coupled to said voltage source and including means for controlling the duration of the individual wash and rinse cycles in said program, first switching means for selectively coupling said timing capacitor to said voltage source, means for initiating a program including means for energizing said first switching means to couple said capacitor to the voltage source, means for controlling the intake of Water into said washing machine, second switching means in series with said intake means and the voltage source and controlled by the output of said first timing circuit, said energizing means being controlled by the output of said second timing circuit so as to deenergize said first switching means at the end of the wash cycle thereby to effectively interrupt the coupling of said timing capacitor to said voltage source, said first timing circuit being operative to control said second switching means to switch off said intake means after a given time delay.
  • a controller as claimed in claim 1 further comprising, a drain pump for emptying the water from said washing machine, third switching means connected in series with said intake means and said voltage source and controlled by the output of said second timing circuit so that, at the end of a time period determined by said cycle controlling means, it interrupts the circuit between said intake means and said voltage source and establishes a circuit between said drain pump and said voltage source.
  • a controller as claimed in claim 1 wherein said second switching means comprises electric switch contact means in series with said intake means and electric control means for operating said contact means and connected across the output of said first timing circuit, said controller further comprising first and second switching elements connected in series across said electric control means, said first switching element being controlled by said energizing means to close at the start of the program and to open at the end oi; the wash cycle, means for sensing the water level in the washing machine, and means responsive to said water level sensing means for energizing said second switching element at a given level of the washer water.
  • a controller as claimed in claim 1 further comprising first and second switching elements connected in series across the input of said first timing circuit, said first switching element being controlled by said energizing means to close at the start of the program and to open at the end of the wash cycle, means for sensing the water level in the washing machine, and second means responsive to said water level sensing means for energizing said second switching element at a given level of the washer water.
  • a controller as claimed in claim 5 further comprising means for controlling the rotation of the washer motor, said rotation controlling means including a fourth photosensitive resistor connected in circuit with the washer motor and optically coupled to said second light source.
  • said cycle controlling means comprises a second timing capacitor
  • said controller further comprising, third switching means controlled by the output of said second timing circuit, water level sensing means including a switching element, means providing a first charge path for said second capacitor at the start of a wash cycle that includes said third switching means, means providing a second charge path for said second capacitor at the start of a rinse cycle that includes said switching element in series with a resistor of a value to provide a time constant for said second charge path that is diderent than that of said first charge path.
  • said second switching means comprises electric switch contact means in series with said intake means and electric control means for operating said contact means and connected across the output of said first timing circuit, means for applying a bias threshold voltage to the input of said rst timing circuit, said electric control means further including second electric switch contact means coupled to said threshold voltage applying means and arranged to selectively vary the threshold voltage at the input of said first timing circuit in accordance with the energizetion of said electric control means.
  • a controller as claimed in claim 1 further comprising, means for sensing thewater level in the washing machine, first and second photosensitive resistors connected in series across the input of said first timing circuit, said first switching means comprising a third photosensitive resistor, said energizing means comprising a first light source optically coupled with said first and third photosensitive resistors, a second light source, means connecting said first and second light sources in circuit with said voltage source to form a shift register, fourth and fifth photosensitive resistors, means connecting said fourth photosensitive resistor in parallel with said first photosensitive resistor and said fifth photosensitive resistor in parallel with said third photosensitive resistor, said second light source being Ioptically coupled with said fourth and fifth photosensitive resistors, a third light source controlled by said water level sensing means and optically coupled to said second photosensitive resistor, and means for igniting said second light source at the start of the program, said shift register being operative to ignite said first light source at the end of a Wash cycle.
  • a controller as claimed in claim 2 wherein said cycle controlling means comprises a second timing capacitor, said controller further comprising temperature sensing means responsive to the temperature of the wash water, a temperature-controlled switching circuit responsive to said temperature sensing means and intercoupling said voltage source with said second timing capacitor, a switching element, a voltage divider including said switching element arranged to supply operating voltage to said temperature-controlled switching circuit, Said voltage divider being operative in the deenergized condition of said switching element to vary the operating Voltage supplied to said switching circuit to cause same to interrupt the coupling between said second timing capacitor and said voltage source.
  • a controller as claimed in claim 11 wherein said energizing means comprises a light source, and said first switching means and said switching element comprise first and second photosensitive resistors, respectively, each of which is optically coupled to said light source.
  • a program controller for stepping a washing machine through a program of successive operations comprising, a source lof supply voltage, a first timing circuit for controlling the number of rinse cycles in the program, a second timing circuit for controlling the duration of a wash period and a rinse period within a wash cycle and a rinse cycle, respectively, of said program, a temperature controlled switching circuit coupled to the input of said second timing circuit and including a first photosensitive resistor for controlling the condition thereof, a second photosensitive resistor coupled to the input circuit of said first timing circuit to control the condition thereof, a first light source optically coupled to said first and second photosensitive resistors, first switching means for coupling said voltage source to said controller thereby energizing said first light source to begin the program, a washer drain pump, first relay means connected to said second timing circuit and having a first set of contacts in series with said voltage source and the drain pump to selectively energize said drain pump, said first relay means further comprising a second set of contacts and means for opening said first set of contacts when said second set is closed, and vice
  • a controller as claimed in claim 1S further comprising third and fourth serially connected photosensitive4 resistors in shunt with said second relay means, a second light source optically coupled to said fourth photof sensitive resistor, water level sensing means having a set of contacts in vseries with said second light source and said voltage source and arranged to energize said second light source at a given level of the washer water, said first light source being optically coupled to said third photosensitive resistor to energize same at the start 4of the program.
  • a controller as claimed in claim 15 further comprising means for connecting said light source, said first photosensitive resistor and said second set of contacts of said first relay means in series with said voltage source.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detergent Compositions (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
US673522A 1965-02-09 1967-10-06 Washing machine Expired - Lifetime US3388566A (en)

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NL6501560A NL6501560A (ru) 1965-02-09 1965-02-09

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US3388566A true US3388566A (en) 1968-06-18

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US (1) US3388566A (ru)
AT (1) AT276282B (ru)
BE (1) BE676172A (ru)
CH (1) CH488045A (ru)
DE (1) DE1585850A1 (ru)
DK (1) DK109558C (ru)
ES (1) ES322731A1 (ru)
GB (1) GB1139003A (ru)
SE (1) SE323646B (ru)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3477258A (en) * 1968-05-20 1969-11-11 Whirlpool Co Total sensing automatic washer
US3483460A (en) * 1967-11-22 1969-12-09 Marquette Corp Apparatus for automatically determining and setting length of charging time
US3483461A (en) * 1967-11-22 1969-12-09 Marquette Corp Battery charging apparatus with timing device
US3601621A (en) * 1969-08-18 1971-08-24 Edwin E Ritchie Proximity control apparatus
US3707857A (en) * 1971-09-20 1973-01-02 Whirlpool Co Multi-purpose sensor assembly for automatic washer
US3750429A (en) * 1971-03-26 1973-08-07 Westinghouse Electric Corp Control for an automatic washer
US3783651A (en) * 1971-12-27 1974-01-08 Whirlpool Co Digital logic control for automatic washer
US20080202170A1 (en) * 2007-02-26 2008-08-28 Diehl Ako Stiftung & Co. Kg Appliance with a Controllable Protection Device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1962011B1 (de) * 2007-02-26 2010-04-21 Diehl AKO Stiftung & Co. KG Wäschebehandlungsgerät
CN110485107A (zh) * 2018-05-15 2019-11-22 青岛海尔洗衣机有限公司 洗衣机烫洗控制方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171045A (en) * 1960-11-25 1965-02-23 Gen Motors Corp Timer
US3246182A (en) * 1962-12-26 1966-04-12 Rca Corp Electronic timing system for automatic machine operations
US3267702A (en) * 1963-11-25 1966-08-23 Schulthess & Co Ag Maschf Programming control apparatus for automatic washing machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171045A (en) * 1960-11-25 1965-02-23 Gen Motors Corp Timer
US3246182A (en) * 1962-12-26 1966-04-12 Rca Corp Electronic timing system for automatic machine operations
US3267702A (en) * 1963-11-25 1966-08-23 Schulthess & Co Ag Maschf Programming control apparatus for automatic washing machines

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483460A (en) * 1967-11-22 1969-12-09 Marquette Corp Apparatus for automatically determining and setting length of charging time
US3483461A (en) * 1967-11-22 1969-12-09 Marquette Corp Battery charging apparatus with timing device
US3477258A (en) * 1968-05-20 1969-11-11 Whirlpool Co Total sensing automatic washer
US3601621A (en) * 1969-08-18 1971-08-24 Edwin E Ritchie Proximity control apparatus
US3750429A (en) * 1971-03-26 1973-08-07 Westinghouse Electric Corp Control for an automatic washer
US3707857A (en) * 1971-09-20 1973-01-02 Whirlpool Co Multi-purpose sensor assembly for automatic washer
US3783651A (en) * 1971-12-27 1974-01-08 Whirlpool Co Digital logic control for automatic washer
US20080202170A1 (en) * 2007-02-26 2008-08-28 Diehl Ako Stiftung & Co. Kg Appliance with a Controllable Protection Device
US7856854B2 (en) 2007-02-26 2010-12-28 Diehl Ako Stiftung & Co. Kg Appliance with a controllable protection device
CN101255646B (zh) * 2007-02-26 2012-01-04 迪尔阿扣基金两合公司 具有可控制保护装置的设备

Also Published As

Publication number Publication date
DK109558C (da) 1968-05-13
ES322731A1 (es) 1967-02-01
DE1585850A1 (de) 1970-11-05
AT276282B (de) 1969-11-25
CH488045A (de) 1970-03-31
GB1139003A (en) 1969-01-08
SE323646B (ru) 1970-05-11
BE676172A (ru) 1966-08-08

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