EP0025470B1 - Minuterie, en particulier pour appareils ménagers - Google Patents

Minuterie, en particulier pour appareils ménagers Download PDF

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Publication number
EP0025470B1
EP0025470B1 EP19790830029 EP79830029A EP0025470B1 EP 0025470 B1 EP0025470 B1 EP 0025470B1 EP 19790830029 EP19790830029 EP 19790830029 EP 79830029 A EP79830029 A EP 79830029A EP 0025470 B1 EP0025470 B1 EP 0025470B1
Authority
EP
European Patent Office
Prior art keywords
cam
auxiliary
program
timer
shaft
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
Application number
EP19790830029
Other languages
German (de)
English (en)
Other versions
EP0025470B2 (fr
EP0025470A1 (fr
Inventor
Paolo Da Pont
Vigilio De Biasi
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.)
Eaton Controls SpA
Original Assignee
Eaton SRL
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
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Application filed by Eaton SRL filed Critical Eaton SRL
Priority to DE7979830029T priority Critical patent/DE2965825D1/de
Priority to EP19790830029 priority patent/EP0025470B2/fr
Publication of EP0025470A1 publication Critical patent/EP0025470A1/fr
Application granted granted Critical
Publication of EP0025470B1 publication Critical patent/EP0025470B1/fr
Publication of EP0025470B2 publication Critical patent/EP0025470B2/fr
Expired legal-status Critical Current

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Classifications

    • 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 operation 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 operation after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
    • H01H43/12—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a single cycle of operation
    • H01H43/121—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a single cycle of operation using a drum
    • 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 operation after the programme is completed
    • H01H43/02—Details
    • H01H43/04—Means for time setting

Definitions

  • This invention relates to a timer to control the operating time of electric circuits, especially electric circuits for household appliances.
  • timers which control the operating cycles of domestic appliances such as washing machines, cooking appliances and so on
  • the operating cycles need to be varied with reference to the successive operations actuated in each case.
  • the control of said operations selected by the user requires timers, the structures and operation of which are rather complex, especially if the capacities of the user are considered.
  • a typical, but not exclusive case is the operating control of washing machines, in which the timer must control the operating time of circuits involving thermal sources, and devices to vary the quality and/or flow rate and/or the circulating intensity of washing and treatment liquids, depending on the material involved in each case.
  • a timer is disclosed the features of which partially meet those ones just discussed. More precisely, axial movement of the timer shaft can cause an auxiliary cam to operate a switch independent of the main cam switches.
  • the auxiliary cam is formed with a portion of large radius which can operate the auxiliary switch, and a small radius portion which will not inter-act with the cam follower.
  • an auxiliary cam can move axially into a position in which it engages a cam follower to operate a switch.
  • the cam shaft is not axially movable, axial cam movement being effected by cooperating camming surfaces on the cam and a flange mounted on the shaft.
  • the cam follower in this disclosure cannot as in the present invention prevent an axial movement of an auxiliary cam wheel for a selected delay period after which an auxiliary program given by cams proceeds normally.
  • the purpose of this invention is to avoid the above drawbacks and at the same time to meet rationally and without difficulty all the requirements normally attainable by the full utilization of the machine controlled by the timer.
  • a motor rotates a main cam and a shaft rotationally coupled to an auxiliary cam, said shaft being movable both rotationally to select an auxiliary program and axially to energize the motor.
  • axial movement bringing about an axial translation of the auxiliary cam relative to a control lever operating a switch concerned with the auxiliary program
  • the auxiliary cam having a circumferential profile which determines the auxiliary program and which includes a smaller radius portion dimensioned not to be engageable with said control lever and a larger radius portion which can engage the lever
  • a rotational movement to select an auxiliary program, or a motor-drive rotation, of the shaft and hence the auxiliary cam brings about an axial alignment of its smaller radius portion with the control lever, said axial translation of the auxiliary cam wheel is permitted, and thereafter the auxiliary program is run, with said control lever now operating as a cam follower on the auxiliary cam.
  • timer illustrated is of the known type and its control shaft is actuated, for example, by a synchronous motor via a suitable clutch.
  • control shaft 10 is provided with an actuating button (not shown) to impart to the shaft both an angular motion and an axial motion in the direction of arrow "X" in Figure 1, so as to actuate the main switch (not shown) of the timer in the usual known manner.
  • shaft 10 is secured to a collar 12 provided with suitable peripheral shaped notches 14 and 16 in either of which an elastic segment 18, in turn axially held by a ledge 20 in a hollow tube 22, can engage to axially position the shaft.
  • a flange 24 on shaft 10 terminates with a crown 26, the ends of which are provided with apertures 28, through which pass the axial projections 30 of tube 22 which are always in engagement with the fixed part K of the timer, for example, the cover thereof.
  • Hollow tube 22 is caused to rotate by shaft 10 whilst it remains axially fixed with respect to same.
  • a collar 32 is secured to hollow tube 22.
  • One of the ends of said collar terminates with a flange 34 to hold and actuate a set of cams 36 which cooperate, in the required sequence, with switches (not shown), to control the different electric circuits.
  • a spring 38 is interposed between collar 32 and a disc 40 supported and elastically urged by spring 38 against crown 26 of flange 24 to form in this manner a driving and coupling means for said 40.
  • the periphery of disc 40 is shaped with sets of differing radial profiles to form shoulders between the groups of contiguous profiles which act as axial stops.
  • the periphery of perforated disc 40 has two radial profiles 42 and 44 of different radii; the second profile 44 is provided with at least one notch 46 to form a cam.
  • Notch or cam 46 is offset by an angle ⁇ from starting point 0 of the timer, as shown in drawings from 3 to 6.
  • radial contour 42 in disc 40 may be in the form of a cam, rather than circular, depending on specific service requirements to be met with by the timer.
  • Radial profiles 42-44 of disc 40 actuate one or more electric switches; in the case illustrated, the profiles actuate a selector switch, the movable contact of which consists of a flexible blade 48, one of the ends of which is secured to the base structure K of the timer and which is provided with a cam follower 50 cooperating both with the shoulder formed by profiles 42 and 44 and with cam 44.
  • the other end of the blade 48 is provided with a contact 55 which cooperates alternatively with fixed contacts 52 and 54 thus forming a selector switch.
  • the timer is especially and advantageously used in connection with a washing machine for the household, in such a case the switch 52-54-55 controls two programs, the first one to wash the usual garments and the second one to wash delicate garments; during the last mentioned program the heating is performed at a reduced and controlled temperature both of the water used for washing and the rinsing water.
  • Figures from 3 through 5 show that, when a predetermined program is selected, which starts prior to the beginning of angle a and between ⁇ and (3, the contact which remains closed is contact 54. On the other hand, when a program is selected, which is comprised between the angular width of a + (3, contact 52 is remaining closed.
  • the invention affords further advantages, in particular, the possibility to do away with the use of a pushbutton type switch on the device (washing machine or similar machine), whilst programming of the timer is performed in such a way that each program is operated in the best way.
  • each program is a compromise, due to the programs which precede or follow the program considered.
  • timer it is possible to co-ordinate the operating cycles of the user, with proper criteria.
  • washing programs for woollen clothes which contemplate static heating of the water and pumping of the water with limited movement
  • pre-washing for all programs
  • possibility to modify the water levels during a cycle possibility to effect drying by cooling and/or drying
  • possibility to select the final phase when washing of delicate clothing is performed.

Landscapes

  • Measurement Of Predetermined Time Intervals (AREA)

Claims (7)

1. Minuterie, en particulier pour appareils ménagers, dans laquelle un moteur fait tourner une came principale (36) et un arbre (10) couplé à rotation à une cam auxiliaire (40), l'arbre (10) pouvant être déplacé en rotation pour sélectionner un programme auxiliaire et axialement pour mettre le moteur sous tension, ce déplacement axial provoquant un mouvement de translation axial de la came auxiliaire (40) par rapport à un levier de commande (50) actionnant un interrupteur (52, 54, 55) se rapportant au programme auxiliaire, la cam auxiliaire présentant un profil circonférentiel (44) qui détermine le programme auxiliaire et qui comprend une partie de petit rayon (46) dimensionnée de manière à ne pas entrer en contact avec la levier de commande (50) et une partie de plus grand rayon (42) qui peut entrer en contact avec le levier, caractérisée en ce que lorsqu'un mouvement de rotation visant à sélectionner un programme auxiliaire ou un mouvement de rotation entraîné par moteur de l'arbre (10) et par conséquent de la came auxiliaire (40) entraîne un alignement axial de sa partie de petit rayon (46) avec le levier de commande (50), le mouvement de translation axial de la roue à came auxiliaire (40) est permis et ensuite le programme auxiliaire est réalisé, le levier de commande (50) se comportant à présent comme un suiveur de came sur la came auxiliaire (40).
2. Minuterie suivant la revendication 1, caractérisée en ce que le levier de commande comporte deux positions actionnant des états de commutation correspondants et est rappelé élastiquement vers sa première position qu'il occupe chaque fois que la partie de petit rayon de la came auxiliaire est axialement en ligne avec le levier (50) ou que la roue n'a pas pu effectuer le déplacement axial parce que l'alignement axial n'a pas été etteint depuis l'actionnement de l'interrupteur.
3. Minuterie suivant la revendication 1 ou 2, caractérisée en ce que le déplacement axial de l'arbre (10) en regard d'un organe axialement fixe (22) déplace une couronne d'arrêt (26) en l'écartant de la came auxiliaire (40) et permet le déplacement axial de la came auxiliaire (chaque fois que l'alignement axial existe) en réaction à une sollicitation élastique exercée sur l'élément axialement fixe (22).
4. Minuterie suivant la revendication 1, 2 ou 3, caractérisée en ce que l'élément axialement fixe (22) est également entraîné en rotation par l'arbre (10) et entraîne avec lui la ou les cames (36) du programme principal.
5. Minuterie suivant la revendication 4, caractérisée en ce que les parties axialement saillantes (30) de l'élément tournant axialement fixe (22) traversent les ouvertures (28) prévues dans une bride (24) d'une pièce avec l'arbre (10) et viennent en contact avec le boîtier fixe (K) de la minuterie, la bride (24) faisant ainsi tourner l'élément axialement fixe (22).
6. Minuterie suivant l'une quelconque des revendications 1 à 5, caractérisée en ce que le levier de commande (50) est fixé à une lame (48) qui est flexible dans le sens radial par rapport à la came auxiliaire (40) et qui est rigide axialement par rapport à celle-ci, tout en formant la partie mobile (55) d'un commutateur électrique (52, 54) et le levier (50) coopère avec un épaulement de la partie de grand rayon (42) de la came auxiliaire pour maintenir celle-ci axialement à l'encontre de la sollicitation d'un ressort (38).
7. Minuterie suivant l'une quelconque des revendications 1 à 6, caractérisée en ce que tout programme de came auxiliaire qui peut être amorcé par un alignement axial final de la partie de petit rayon (46) et du levier de commande (50) est intégré à un programme de la ou des cames principales (36).
EP19790830029 1979-09-18 1979-09-18 Minuterie, en particulier pour appareils ménagers Expired EP0025470B2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE7979830029T DE2965825D1 (en) 1979-09-18 1979-09-18 Timer especially for household appliances
EP19790830029 EP0025470B2 (fr) 1979-09-18 1979-09-18 Minuterie, en particulier pour appareils ménagers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19790830029 EP0025470B2 (fr) 1979-09-18 1979-09-18 Minuterie, en particulier pour appareils ménagers

Publications (3)

Publication Number Publication Date
EP0025470A1 EP0025470A1 (fr) 1981-03-25
EP0025470B1 true EP0025470B1 (fr) 1983-07-06
EP0025470B2 EP0025470B2 (fr) 1988-02-03

Family

ID=8186541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790830029 Expired EP0025470B2 (fr) 1979-09-18 1979-09-18 Minuterie, en particulier pour appareils ménagers

Country Status (2)

Country Link
EP (1) EP0025470B2 (fr)
DE (1) DE2965825D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658358B1 (fr) * 1990-02-14 1992-05-15 Eaton Controls Sa Programmateur avec preselection verrouillable.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3431372A (en) * 1967-04-17 1969-03-04 Controls Co Of America Timer switch actuation and connection
NL7018630A (fr) * 1970-03-05 1971-09-07
US3819886A (en) * 1970-09-03 1974-06-25 Mallory & Co Inc P R Cam-operated timer with rotary switch means including movable contacts on the cam
FR2271609B1 (fr) * 1974-05-14 1977-06-24 Carpano & Pons
GB1468863A (fr) * 1974-08-09 1977-03-30
DE2746312C2 (de) * 1977-10-14 1987-04-23 Eaton GmbH, 7778 Markdorf Programmschaltwerk

Also Published As

Publication number Publication date
DE2965825D1 (en) 1983-08-11
EP0025470B2 (fr) 1988-02-03
EP0025470A1 (fr) 1981-03-25

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