US3486072A - Door lock safety system for automatic appliances - Google Patents

Door lock safety system for automatic appliances Download PDF

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Publication number
US3486072A
US3486072A US609877A US3486072DA US3486072A US 3486072 A US3486072 A US 3486072A US 609877 A US609877 A US 609877A US 3486072D A US3486072D A US 3486072DA US 3486072 A US3486072 A US 3486072A
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US
United States
Prior art keywords
door
winding
motor
switch
door lock
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
US609877A
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English (en)
Inventor
Yves Thibaut
Dominque Toulemonde
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.)
US Philips Corp
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US Philips 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
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3486072A publication Critical patent/US3486072A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/08—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body in connection with the locking of doors, covers, guards, or like members giving access to moving machine parts
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4251—Details of the casing
    • A47L15/4257—Details of the loading door
    • A47L15/4259—Arrangements of locking or security/safety devices for doors, e.g. door latches, switch to stop operation when door is open
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door

Definitions

  • a door lock safety system for a dishwasher that includes an electromagnet for controlling the door lock mechanism.
  • the safety system is arranged so that the door can only be unlocked when the magnet is energized.
  • the energizing circuit for the electromagnet includes a centrifugal switch actuated by the washer motor to open said circuit when the motor rotates at high speed.
  • the invention relates to a safety device for use in a washing machine, a dish-washer or the like, of the type comprising a rotatable part to be driven at different speeds, and a door or lid leading to the rotatable part and a locking mechanism for said door, said mechanism comprising an electromagnet.
  • the present invention obviates these disadvantages and is characterized in that the device comprises, in addition, a centrifugal switch which opens the energizing circuit of the electro-magnet during high speed rotation of the rotatable part and closes it during low speed rotation of said part such that the door can only be opened when the magnet is energized.
  • FIGURE 1 illustrates the basic diagram of the safety device according to the invention.
  • FIGURE 2 shows one embodiment of a washing machine according to the invention which shows only those parts which are necessary for a good understanding of the invention.
  • FIGURE 1 symbolically shows the motor driving the drum (not shown) of a washing machine by means of a winding 1.
  • said motor drives a centrifugal switch 3, through which an electro-magnet, represented by a coil 4 and an armature core 5, can be energized.
  • the energizing circuit also includes a switch 6, which can be closed by depressing a push-button 7, which has to be pushed for opening the door 8 (FIG. 2).
  • a second pushbutton 9 which is mechanically coupled to push-button 7 so that if one button is depressed the other is released, actuates a switch 10 for connecting the winding 1 of the motor to the terminals 11 and 12 of the electric supply source.
  • a hook 16 of a mortise and hook joint is pivotally mounted so that closing the door causes the hook to pivot clockwise to engage a hole in the lug 23 mounted on the door.
  • the rod 15, which is coupled to the hook then moves to the right.
  • a lever arm 14 couples rod 15 to the armature 5 of the electromagnet so that the armature is withdrawn from the coil 4 when rod 15 moves to the right.
  • a microswitch 13 is coupled to rod 15 and is closed when rod 15 is moved to its extreme right hand position. Owing to a micro-switch 13, the motor Winding 1 only receives a current, when the door 8 has previously been closed.
  • the centrifugal switch 3 is then open so that the electro-magnet cannot be energized and the door cannot be opened until the speed of rotation of the drum has again become sufficiently low to allow the centrifugal switch 3 to close.
  • Depressing button 7 opens switch 10 so that the motor is deenergized and begins to slow down. At a given low speed, the centrifugal switch 3 closes and energizes winding 4 of the electro-rnagnet.
  • Rod 14 then moves rod 15 to the left so that hook 16 pivots counterclockwise out of the hole in lug 23, thereby unlocking the door 8. At the same time, rod 15 opens switch 13 in series with the motor winding 1.
  • the hook 16 can then be changed over by means of a cable 17, which is adapted to move in a housing 18.
  • One end of the cable 17 is secured to the rod 14, Whereas the other end is connected to a plate 19, which is adapted to slide in a support 20.
  • the vertical displacement of the plate 19 is facilitated by using a member 21, for example, a screw driver. Since the cable for mechanical actuation is used only in emergency, it is accommodated in the washer at a place which is accessible only after part of the machine housing is dis-mounted, thereby avoiding accidental actuation during normal operation.
  • a washing and centrifugal machine including a rotatable part driven at two or more different speeds and a door or lid providing access to the rotatable part, the improvement comprising a locking mechanism for said door, said mechanism comprising an electro-magnet, having a movable core coupled to the door latching member to lock the door when the winding of the electromagnet is deenergized, an electrical energizing circuit for the winding of the electromagnet that includes a centrifugal switch actuated by said rotatable part so as to open the energizing circuit of the electro-magnet during high speed rotation of the rotatable part and closes it during low speed rotation of said part, said movable core being arranged to unlock the door only when the magnet is energized.
  • a motor driven electric appliance including a rotatable member adapted to be driven at two or more different speeds, a housing having a door and a lock mechanism for the door, wherein the improvement comprises a safety lock system for the door comprising, an electromagnet having a winding and an armature core coupled to the door lock mechanism so as to lock the door when said winding is deenergized and to unlock the door when the winding is energized, a first electrical energizing circuit for energizing said electromagnet winding, a second electrical energizing circuit adapted to energize said motor, switch means arranged to energize said first and second energizing circuits during mutually exclusive time intervals, and a centrifugal switch connected in said first energizing circuit and actuated by said motor so as to interrupt the energizing circuit for electromagnet winding when the rotatable member is rotated at high speed and toclose said circuit when the rotatable member is rotated at low speed.
  • An appliance as claimed in claim 2 further comprising a switch connected in said second energizing circuit and actuated by the door lock mechanism so as to energize said motor only in the locked position of the door.
  • said door lock mechanism comprises a mortise and hook joint
  • said appliance further comprising a movable rod coupled to said hook, a lever coupled to said rod and to the electromagnet armature for transferring the motion of said armature to said hook so as to unlock the hook when the electromagnet winding is energized.
  • a safety lock system for the door comprising, a source of electric energy, an electromagnet having a winding and an armature core coupled to the door lock mechanism so as to lock the door when said winding is deenergized and to unlock the door when the winding is energized, a centrifugal switch actuated by the motor, means serially connecting said centrifugal switch and the electromagnet winding across said energy source, said centrifugal switch being arranged to open the circuit to said winding when the motor rotates above a given speed, a switch connected in series with the motor winding across said energy source, said switch being actuated by the door lock mechanism so as to close the circuit to said motor winding only when the door is locked.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
US609877A 1966-01-17 1967-01-17 Door lock safety system for automatic appliances Expired - Lifetime US3486072A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR46072A FR1483754A (fr) 1966-01-17 1966-01-17 Dispositif de sécurité pour machines comportant une partie tournante

Publications (1)

Publication Number Publication Date
US3486072A true US3486072A (en) 1969-12-23

Family

ID=8598826

Family Applications (1)

Application Number Title Priority Date Filing Date
US609877A Expired - Lifetime US3486072A (en) 1966-01-17 1967-01-17 Door lock safety system for automatic appliances

Country Status (10)

Country Link
US (1) US3486072A (fr)
AT (1) AT289017B (fr)
BE (1) BE692708A (fr)
CH (1) CH445430A (fr)
DE (1) DE1585857A1 (fr)
ES (1) ES335665A1 (fr)
FR (1) FR1483754A (fr)
GB (1) GB1178761A (fr)
NL (1) NL6700442A (fr)
SE (1) SE322754B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621963A (en) * 1969-12-18 1971-11-23 Maytag Co Spinner control for a laundry appliance
JPS4711976U (fr) * 1971-03-05 1972-10-12
CN107374546A (zh) * 2017-07-31 2017-11-24 宁波欧琳厨具有限公司 水槽式洗碗机的开门结构
US11306712B2 (en) * 2019-04-15 2022-04-19 Sugino Machine Limited Pump apparatus and method of operating pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL182609C (nl) * 1977-02-10 1988-04-05 Philips Nv Videoplatenspeler.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598440A (en) * 1951-07-05 1952-05-27 Gen Electric Directional switch
US2670001A (en) * 1951-03-30 1954-02-23 Crane Packing Co Electric control for motors
US2674334A (en) * 1951-06-06 1954-04-06 Edward C Uberbacher Automatic lock for automobile doors
US2902850A (en) * 1953-07-08 1959-09-08 American Laundry Mach Co Safety door lock and control for washing machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2670001A (en) * 1951-03-30 1954-02-23 Crane Packing Co Electric control for motors
US2674334A (en) * 1951-06-06 1954-04-06 Edward C Uberbacher Automatic lock for automobile doors
US2598440A (en) * 1951-07-05 1952-05-27 Gen Electric Directional switch
US2902850A (en) * 1953-07-08 1959-09-08 American Laundry Mach Co Safety door lock and control for washing machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621963A (en) * 1969-12-18 1971-11-23 Maytag Co Spinner control for a laundry appliance
JPS4711976U (fr) * 1971-03-05 1972-10-12
JPS5034839Y2 (fr) * 1971-03-05 1975-10-09
CN107374546A (zh) * 2017-07-31 2017-11-24 宁波欧琳厨具有限公司 水槽式洗碗机的开门结构
US11306712B2 (en) * 2019-04-15 2022-04-19 Sugino Machine Limited Pump apparatus and method of operating pump

Also Published As

Publication number Publication date
FR1483754A (fr) 1967-06-09
NL6700442A (fr) 1967-07-18
CH445430A (de) 1967-10-31
AT289017B (de) 1971-03-25
GB1178761A (en) 1970-01-21
DE1585857A1 (de) 1971-06-16
BE692708A (fr) 1967-07-17
SE322754B (fr) 1970-04-20
ES335665A1 (es) 1968-04-16

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