US3741019A - Shaft locking device for a timer - Google Patents

Shaft locking device for a timer Download PDF

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Publication number
US3741019A
US3741019A US00179652A US3741019DA US3741019A US 3741019 A US3741019 A US 3741019A US 00179652 A US00179652 A US 00179652A US 3741019D A US3741019D A US 3741019DA US 3741019 A US3741019 A US 3741019A
Authority
US
United States
Prior art keywords
cam
engaging
carrying shaft
ratchet
way clutch
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
US00179652A
Other languages
English (en)
Inventor
R Weber
B Chestnut
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.)
Duracell Inc USA
Emerson Electric Co
Original Assignee
PR Mallory and Co Inc
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 PR Mallory and Co Inc filed Critical PR Mallory and Co Inc
Application granted granted Critical
Publication of US3741019A publication Critical patent/US3741019A/en
Anticipated expiration legal-status Critical
Assigned to EMERSON ELECTRIC CO. A CORP. OF MISSOURI reassignment EMERSON ELECTRIC CO. A CORP. OF MISSOURI ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EMHART INDUSTRIES, INC. A CORP. OF CONNECTICUT
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
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • 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
    • F16H—GEARING
    • F16H2700/00—Transmission housings and mounting of transmission components therein; Cooling; Lubrication; Flexible suspensions, e.g. floating frames
    • F16H2700/02—Transmissions, specially for working vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/10—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
    • H01H43/106—Manual programme selecting means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/11—Tripping mechanism
    • Y10T74/114—Retarded

Definitions

  • ABSTRACT When a cam carrying shaft of a timer is axially indexed, a lever is actuated to move a retaining means into. engagement with a one-way clutch means to prevent manual rotation of the cam carrying shaft.
  • Timing mechanisms are used in the appliance field to operate an appliance in accordance with a programmed sequence-For example, automatic washers and dryers perform their sequences of operation in accordance with the operation of a timing mechanism.
  • the program desired such as a particular wash or drying cycle, may be manually set by the operator of the appliance.
  • means must also be provided to insure that there is no manual setting of the timer when it is under power driven operation.
  • the present invention therefore, relates to a timing mechanism and has as one of its objects the provision of a timing mechanism having a means to prevent manual rotation of a cam carrying shaft when the shaft is under power driven rotation.
  • Another object of the invention is the provision of a timing mechanism having a one-way clutch means coupling a motor to a cam carrying shaft and means engaging the one-way clutch means to prevent manual rotation of the cam carrying shaft when the timer is under power driven-rotation.
  • FIG. 1 is a side elevation of a timer employing the principles of the invention
  • FIG. 2 is a view taken along the line 2-2 of FIG. 1;
  • FIG. 3 is a partial side elevation of the timer in another operating mode.
  • the objects of the invention are accomplished by providing a timer which, in' general,
  • a motor drive means a manually rotatable and axially indexable cam carrying shaft and cam means carried by the shaft, a one-way clutch means coupling the motor drive means to the cam carrying shaft for power driven rotation, and lever means coupled to the cam carrying shaft and to a retaining means, indexing of the cam carrying shaft actuating the lever means to engage the retaining means with the one-way clutch means.
  • a timer which, in general, includes a motor drive means 12, a speed reducing means 14, and a one-way clutch means 16 which couples the speed reduction means 14 to a cam carrying shaft 18 through a gear 20.
  • Gear 20 is carried by cam carrying shaft 18.
  • Cam means 22 includes a plurality of cams 22' carried by a hub portion 23 which is fixedly carried by the cam carrying shaft 18.
  • rotation of cam means 22 opens and closes appropriate switches in a manner well known in the art.
  • Gear 20 includes a hub portion 24 which is rotatably journalled on bushing 26.
  • Cam carrying shaft 18 includes a reduced portion 18 which is rotatably journalled in bushing 26. The other end of the shaft is journalled in top plate 27.
  • detents 28, 28' adapted to receive a hair-pin 30 when the shaftis axially indexed. The hair-pin, in combination with the detents, limit the axial indexing of the shaft.
  • Motor drive means 12 includes a synchronous motor 12' having an output pinion 13 to which is coupled speed reducing means 14, speed reducing means 14 including a plurality of gears and pinions in accordance with the amount of speed reduction required.
  • output pinion 13 engages gear 15 which in turn meshes with gear 17 which in turn meshes with gear 19.
  • One-way clutch means 16 includes a substantially circular spring arm or pawl 32 one end of which is pivotally carried on gear 19 through post 34, ratchet 36, and output pinion 38.
  • Pawl 32 includes a tooth 33 engaging ratchet 36. It is resilient with its free end sprung about post 37.
  • Ratchet 36 and output pinion 38 are integral and are carried by axle 40.
  • cam carrying shaft 18 may be manually rotated to set a desired program for the cam means 22. Such manual rotation may be effectuated through a knob 21 fixedly carried by the cam carrying shaft 18. However, means must be provided to insure that such manual rotation does not occur when the cam means 22 is being power driven through the motor means 12. In the present invention, such prevention of the manual rotation is achieved through retaining means 44 which is actuated by lever means 46.
  • Retaining means 44 includes a substantially flat and circular spring 48 which substantially surrounds unidirectional means 16 and which is spring biased against bottom plate 25 through tangs 50. The leaf portions 48', 48", and 48" tend to bias the spring upwardly, or away from the plate.
  • Lever means 46 includes a yoke 52 having arms 52' and 52" extending from a central portion 52".
  • the central portion also includes a gripping means 54 which includes a pair of arms 56 and 58, each carried by a post 60, and each engaging one of the cams 22'.
  • Each of the arms 52' and 5 2" are pivotally mounted about the hub 24 through tangs 62and 64 which are lanced from base plate 25.
  • Tabs 66 and 68 carried at the ends of the'arms engage spring 48 to ac- I tuate the spring in accordance with the movement of the yoke.
  • spring 48 With the cam carrying shaft indexed outwardly as shown in FIG. 3, spring 48 will be actuated downwardly into engaging position with respect to pawl 32.
  • a switch means 70 which operates as a line switch to close electrical contacts 72 and 74 to complete an electrical circuit to the motor for power driven rotation in a manner well known in the art.
  • a timer comprising:
  • motor drive means b. a manually rotatable and axially indexable cam carrying shaft and cam means carried by said shaft,
  • a yoke having a central portion and arms centrally pivoted about said cam carrying shaft, said central portion of said yoke having means engaging a cam of said cammeans, and
  • a timer according to claim 1 wherein said one-way clutch means includes a pawl engaging a ratchet, said spring intermittently engaging said pawl in response to movement of said lever means to hold said pawl in engagement with said ratchet means.
  • said pawl includes a substantially circular spring arm surrounding said ratchet and having a tooth extending inwardly to engage said ratchet, and said spring is substantially circular, actuation of said lever engaging an inner surface
  • a one-way clutch means coupling said speed reducv tion means to said gear means, including a substantially circular spring arm carried by said gear and substantially surrounding a ratchet carried by said axle and having a tooth engaging said ratchet, e. a substantially circular spring substantially surrounding said circular spring arm, and f. a lever pivotally mounteda'bout said cam carrying shaft, one end of said lever engaging said cam means, the other end including means engaging said substantially circular spring, I

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Predetermined Time Intervals (AREA)
  • Drying Of Solid Materials (AREA)
US00179652A 1971-09-13 1971-09-13 Shaft locking device for a timer Expired - Lifetime US3741019A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17965271A 1971-09-13 1971-09-13

Publications (1)

Publication Number Publication Date
US3741019A true US3741019A (en) 1973-06-26

Family

ID=22657432

Family Applications (1)

Application Number Title Priority Date Filing Date
US00179652A Expired - Lifetime US3741019A (en) 1971-09-13 1971-09-13 Shaft locking device for a timer

Country Status (2)

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US (1) US3741019A (enrdf_load_stackoverflow)
JP (1) JPS4837670A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886802A (en) * 1973-05-29 1975-06-03 Whirlpool Co Multispeed timer dryer control
US3968698A (en) * 1973-02-20 1976-07-13 Deltrol Corporation Automatic reset timer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54181866U (enrdf_load_stackoverflow) * 1978-06-13 1979-12-22
JPS57174847A (en) * 1981-04-22 1982-10-27 Mitsubishi Electric Corp Fluorescent discharge lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968698A (en) * 1973-02-20 1976-07-13 Deltrol Corporation Automatic reset timer
US3886802A (en) * 1973-05-29 1975-06-03 Whirlpool Co Multispeed timer dryer control

Also Published As

Publication number Publication date
JPS4837670A (enrdf_load_stackoverflow) 1973-06-02

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Legal Events

Date Code Title Description
AS Assignment

Owner name: EMERSON ELECTRIC CO. A CORP. OF MISSOURI, MISSO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EMHART INDUSTRIES, INC. A CORP. OF CONNECTICUT;REEL/FRAME:005691/0720

Effective date: 19910125