US3803725A - Clothes dryer with starter safety switch - Google Patents

Clothes dryer with starter safety switch Download PDF

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Publication number
US3803725A
US3803725A US00287472A US28747272A US3803725A US 3803725 A US3803725 A US 3803725A US 00287472 A US00287472 A US 00287472A US 28747272 A US28747272 A US 28747272A US 3803725 A US3803725 A US 3803725A
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US
United States
Prior art keywords
elongated member
switch
drum
door
push button
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
US00287472A
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English (en)
Inventor
K Takeyama
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of US3803725A publication Critical patent/US3803725A/en
Anticipated expiration legal-status Critical
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    • 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
    • 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
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
    • D06F34/30—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress characterised by mechanical features, e.g. buttons or rotary dials
    • 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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 

Definitions

  • the present invention relates to a rotatable drum type clothes dryer and, more particularly, to safety means therefor.
  • this type of dryer usually has safety means such as a door switch so that it cannot start to operate as long as an access door is not closed.
  • Thepresent invention has been achieved in view of the above 'andhas asa'n object to provide a clothes dryer including a microswitch which can be closed only when grooves in a pair of slidable members align with each other so that, even when a time switch is preset and an access door isclosed, the dryer cannot start to operate.
  • a further object of the present invention is to provide a clothes dryer which is simple in construction and less expensive to manufacture byproviding a'microswitch which serves as a door switch and at the same time as a start switch.
  • a still furtherobject of the present invention is. to provide a clothes dryer in which, even when grooves in a pair of slidable members align with each other to close a microswitch and the dryer is being operated, the microswitch can be opened as soon as the access door is opened toensure a safe operation.
  • a further object of the present invention is to provide a clothes dryer which has a start switch provided on the upper part of dryer housing so as to facilitate its handling.
  • FIG. 1 is a front view of a clothes dryer embodying the present invention with a part broken away'in order to show the interior of the dryer; i
  • FIG. 2 is a vertical sectional view of the dryer shown in FIG. 1;
  • FIG. 3 is a fragmentary enlarged sectional view
  • FIG. 4 is a sectional view showingaswitch actuating mechanism, the switch being shown in the opened position;
  • FIG 5 is a view similar to FIG. 4 but showing the switch in closed position; and I F166 is an electrical circuit diagram used in the clothes dryer.
  • reference numeral (1) designates an outer housing 'of a dryer.
  • Reference numeral (2) indi- 'cates a rotatable drum supported in said outer housing (1) with an axis of rotation extending horizontally.
  • Reference numeral (3) represents a condenser type motor for driving the rotatable drum (2) and an exhaust blower (4).
  • the motor (3) is mounted on the bottom of the outer housing (1) by means of a bracket (3).
  • Reference numeral (5) designates an opening provided in the front face of the rotatable drum (2) for throwing clothes into the dryer.
  • Reference numeral (6) indicates an access door mounted on said outer housing (1) and adapted to close said opening (5), numeral (7) indicating a plurality of perforations formed in the front face of the rotatable drum (2), and numeral (8) indicating a heater mounting plate disposed in such a'manner that it covers the front face portion of the rotatable drum (2).
  • the heater mounting plate 8) has a lower portion extending downwardly beyond the outer periphery of the drum (2) to provide an extension (8') on which an electrical heater (9) is mounted.
  • Reference numeral (10) designates an insulator provided.
  • reference numeral (11) indicating a flange formed on the inner peripheral portion of the plate (8) for rotatably supporting the front part of the drum (2) through a low friction seat (12) made of Teflon (Trade Mark) or the like material.
  • Reference numeral (13) designates a fine mesh screen filter made of nylon or the like material and provided at the center part of therear portion of the drum (2), referencenumeral (14) indicating a filter cover made of polypropylene or the like material and fitted at its outer periphery to projections;(2') of the drum (2). As shown in FIG.
  • the filter cover (14) holds the filter (13) at its inner periphery and is resiliently fitted at its outer periphery to the projections (2) on the drum (2). Thus, the cover (14) can readily be removed and replaced in position.
  • Reference numeral (15) designates a plane belt extending around a' driving pulley (16) and the drum (2) for driving the latter.
  • Reference numeral 17 designates an idler pulley for tensioning the belt (15), reference numeral (18) indicating a driving belt for the blower (4) extending around a blower driving pulley (19) on the motor (3) and a pulley( 21) provided on a blower shaft (20).
  • --Numeral (22) designates a blower casingwhich rotatably supports a drum shaft ('24) at its central portion through a self-centering bearing (23), so'as to rotatably support therear portion of the rotatable drum (2).
  • Numeral (25) designates a plurality of baffle plates made of a plastic material such as polypropylene and disposed, in the rotatable drum (2) for causing the clothes to be dried to'revolutionally fall inthe drum and for agitating the clothes;
  • Reference'numeral (26) designates -a belt cover mounted at the lower portion of the rear (3).
  • Numeral (28) designates caster wheels provided at v the outside of-the bottom of the outer housing (1 numeral (29) indicating a plurality of perforations formed in the rear face of the drum (2), numeral (30) indicating air exhaust holes formed in the blowercasing (22), numeral (31) representing a plurality of partition plates provided on the baffle plate (25), numeral (32) indicating an air exhaust hole provided at the upper-portion of the rear face of the housing (1), and numeral (33) indicating a time switch mounted at the front upper portion of the housing (1) for time controlling the motor circuit and the heater circuit as shown in FIG. 6.
  • Reference numeral (34) designates a start switch mounted on the housing (1) at a position above the time switch (33). The construction of the start switch (34) will be described with reference to FIGS. 2 through 4.
  • reference numeral (35) designates a door packing for air-tightly sealing the opening when the door (6) is closed
  • numeral (36) indicating a lever mounted on the front face of the housing 1) by a pin (37) and having a projection (36) at one end.
  • the projection (36) is moved in the direction shown by an arrow A (in FIG. 3) when the door (6) is closed.
  • the other end (36") of the lever (36) is in abutting relation with a sliding plate (38) of the start switch (34).
  • the reference numeral (39) designates a manual push button mounted on the front face of the outer housing (1).
  • another sliding plate (40) of the start switch (34) is pushed in the direction shown by the arrow B.
  • Numeral (41) designates screws for mounting the sliding plate (40) on the cylindrical portion (39') of the push button (39),
  • numeral (42) indicating a substantially U-shaped mounting plate for slidably holding the cylindrical portion (39) of the push button (39).
  • the mounting plate (42) is secured at its opposite ends to the outer housing (1).
  • Reference numerals (43) and (44) designate a flat mounting plate and a substantially U-shaped mounting plate, respectively, for slidably holding the sliding plates (38) and (40), respectively, numeral (45) denoting a spring disposed around the cylindrical portion (39) of the manual push button for applying a returning force to the push button (39).
  • Numeral (46) designates a spring having one end secured to the U-shaped mounting plate (44) and the other end to one end (38') of the L-shaped sliding plate (38) for urging the sliding plate (38) into abutting engagement with the end (36") of the lever (36).
  • Numeral (47) shows a U-shaped slanted cut-out groove formed in the substantially central portion of the sliding plate (38).
  • the groove (47) has an edge (47) which is slightly inclined with respect to a path along which the plate (38) is slidably moved by the lever (36).
  • the sliding plate (40) also has at its center portion a U-shaped groove (48).
  • a microswitch (49) which has an actuating pin (50) adapted to be inserted into the grooves (47) and (48) when they are aligned with each other.
  • the pin (50) of the microswitch (49) is so biased that it projects outwardly and the microswitch is so constructed that it is closed when the pin (50) engages with the grooves (47) and (48).
  • the sliding plates (38) and (40) are so disposed that they can be superposed one on the other.
  • the switch (34) is positioned between a suitable power source (51) and the time switch (33) in a series relation with the latter.
  • Reference numeral (52) designates a capacitor for the motor (3), numeral (53) representing a timing motor for driving the time switch (33), numeral (54) representing a thermostat, andnumeral (55) representing a heater.
  • the atmospheric air is introduced through the air intake hole (27) formed in the rear portion of the housing (1) and passed about the motor (3) toward the mounting plate (8) effectively cooling the motor (3).
  • the air is then passed through the space between the mounting plate (8) and the rotatable drum (2),-heated by the heater (9) and thereafter introduced through the perforations (7) into the drum (2).
  • the hot air in the drum (2) is circulated by the baffle plate (25) and distributed in the drum (2).
  • the hot air which has passed through the drum (2) is directed to flow through the cover (14) and the filter (13) and filtered there-by. Thus, only wet air is exhausted from the housing (1) through hole (32).
  • a clothes dryer comprising an outer housing, a drum rotatably supported in said housing with an axis of rotation thereof extending substantially horizontally, a motor for driving said drum, said drum having an opening in the front side thereof for loading and unloading clothes into and out of said drum, a door mounted on said housing adjacent said opening for pivotal movement between open and closed positions, and a switch for starting the operation of said dryer, the improvement comprising a mechanism for operating said switch, said mechanism including:
  • a lever member pivotally mounted on said outer housing at a first portion between ends of said lever member, said lever member having a second portion adjacent one of said ends, said second portion being positioned in a path of the pivotal movement of said door so that said lever member is pivotally c. a first elongated member extending within said housing in substantially parallel relationship to said push button and having an end secured to said push button for substantially linear movement thereby,
  • a first biasing means normally urging said push button in one of its axial directions
  • said lever member having a third portion adjacent the other end thereof in abutting relationship to an end of said second elongated member whereby, upon pivotal movement of said lever member, said second elongated member is moved into said superposed position with respect to said first elongated member,
  • said switch having an actuating pin extending therefrom and resiliently urged against a longitudinal surface of each of said first and second elongated members, and
  • said first and second elongated members being formed with grooves in the surfaces thereof against which said actuating pin of said switch is urged, the arrangement being such that said grooves are aligned with each other to allow said actuating pin to be moved into the aligned grooves only when said door is moved to its closed position and said push button is pushed.
  • a switch operation mechanism further including a second biasing means urging said second elongated member against said lever member, and the groove in said second elongated member having an edge inclined with respect to the surface of said second elongated member in contact with said actuating pin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Push-Button Switches (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
US00287472A 1971-10-29 1972-09-08 Clothes dryer with starter safety switch Expired - Lifetime US3803725A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46086465A JPS5221218B2 (enrdf_load_stackoverflow) 1971-10-29 1971-10-29

Publications (1)

Publication Number Publication Date
US3803725A true US3803725A (en) 1974-04-16

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Application Number Title Priority Date Filing Date
US00287472A Expired - Lifetime US3803725A (en) 1971-10-29 1972-09-08 Clothes dryer with starter safety switch

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US (1) US3803725A (enrdf_load_stackoverflow)
JP (1) JPS5221218B2 (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924085A (en) * 1974-03-18 1975-12-02 Gen Electric Safety-start device and circuit controller for domestic appliance
US4511780A (en) * 1983-01-14 1985-04-16 Tokyo Shibaura Denki Kabushiki Kaisha Door latch assembly for microwave heating apparatus
EP0392247A1 (en) * 1989-04-12 1990-10-17 INDUSTRIE ZANUSSI S.p.A. A domestic drying machine for laundry provided with an improved safety device
EP0485758A3 (en) * 1990-11-16 1993-05-05 Bosch-Siemens Hausgeraete Gmbh Patent- Und Vertragswesen Closure device for a danger area
US5664340A (en) * 1996-03-18 1997-09-09 Brown; Clay A. Ultravoilet, antibacterial, antifungal dryerlight
US6600397B2 (en) * 2000-03-08 2003-07-29 Itw Industrial Components S.R.L. Device for controlling an electric appliance, in particular a drier or other electric household appliance
US20070199207A1 (en) * 2006-02-27 2007-08-30 Lg Electronics Inc. Drum for clothes dryer
EP2540899A1 (en) 2011-07-01 2013-01-02 Vladimir Vonka A machine for treating laudry or dishes , a door asembly for the machine and a kit of parts for the machine
CN104514128A (zh) * 2013-09-27 2015-04-15 江门市地尔汉宇电器股份有限公司 家用离心式脱水机的控制方法及使用该方法的脱水机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51137957A (en) * 1975-05-23 1976-11-29 Hitachi Ltd Drum dryer
JPS51137958A (en) * 1975-05-23 1976-11-29 Hitachi Ltd Drum dryer
JPS5439258A (en) * 1977-07-20 1979-03-26 Matsushita Electric Ind Co Ltd Clothe drier
JPS6120621U (ja) * 1984-07-02 1986-02-06 東洋プライウツド株式会社 壁体構造

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2769246A (en) * 1953-05-06 1956-11-06 Murray Corp Clothes drier
US3273256A (en) * 1964-11-02 1966-09-20 Borg Warner Dry cleaning machine
US3546410A (en) * 1968-04-05 1970-12-08 Texas Instruments Inc Electrical safety switch particularly useful with appliances having door-like members
US3609265A (en) * 1970-06-25 1971-09-28 Hoover Co Dual-actuated switch-operating mechanism
US3713226A (en) * 1970-10-20 1973-01-30 Matsushita Electric Ind Co Ltd Clothes dryer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2769246A (en) * 1953-05-06 1956-11-06 Murray Corp Clothes drier
US3273256A (en) * 1964-11-02 1966-09-20 Borg Warner Dry cleaning machine
US3546410A (en) * 1968-04-05 1970-12-08 Texas Instruments Inc Electrical safety switch particularly useful with appliances having door-like members
US3609265A (en) * 1970-06-25 1971-09-28 Hoover Co Dual-actuated switch-operating mechanism
US3713226A (en) * 1970-10-20 1973-01-30 Matsushita Electric Ind Co Ltd Clothes dryer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924085A (en) * 1974-03-18 1975-12-02 Gen Electric Safety-start device and circuit controller for domestic appliance
US4511780A (en) * 1983-01-14 1985-04-16 Tokyo Shibaura Denki Kabushiki Kaisha Door latch assembly for microwave heating apparatus
EP0392247A1 (en) * 1989-04-12 1990-10-17 INDUSTRIE ZANUSSI S.p.A. A domestic drying machine for laundry provided with an improved safety device
EP0485758A3 (en) * 1990-11-16 1993-05-05 Bosch-Siemens Hausgeraete Gmbh Patent- Und Vertragswesen Closure device for a danger area
US5664340A (en) * 1996-03-18 1997-09-09 Brown; Clay A. Ultravoilet, antibacterial, antifungal dryerlight
US6600397B2 (en) * 2000-03-08 2003-07-29 Itw Industrial Components S.R.L. Device for controlling an electric appliance, in particular a drier or other electric household appliance
US20070199207A1 (en) * 2006-02-27 2007-08-30 Lg Electronics Inc. Drum for clothes dryer
US8042282B2 (en) * 2006-02-27 2011-10-25 Lg Electronics Inc. Drum for clothes dryer
EP2540899A1 (en) 2011-07-01 2013-01-02 Vladimir Vonka A machine for treating laudry or dishes , a door asembly for the machine and a kit of parts for the machine
CN104514128A (zh) * 2013-09-27 2015-04-15 江门市地尔汉宇电器股份有限公司 家用离心式脱水机的控制方法及使用该方法的脱水机
CN104514128B (zh) * 2013-09-27 2017-04-26 江门市地尔汉宇电器股份有限公司 家用离心式脱水机的控制方法及使用该方法的脱水机

Also Published As

Publication number Publication date
JPS4851357A (enrdf_load_stackoverflow) 1973-07-19
JPS5221218B2 (enrdf_load_stackoverflow) 1977-06-09

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