EP0025470B2 - Zeitschalter, insbesondere für Haushaltsgeräte - Google Patents

Zeitschalter, insbesondere für Haushaltsgeräte Download PDF

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Publication number
EP0025470B2
EP0025470B2 EP19790830029 EP79830029A EP0025470B2 EP 0025470 B2 EP0025470 B2 EP 0025470B2 EP 19790830029 EP19790830029 EP 19790830029 EP 79830029 A EP79830029 A EP 79830029A EP 0025470 B2 EP0025470 B2 EP 0025470B2
Authority
EP
European Patent Office
Prior art keywords
cam
auxiliary
shaft
auxiliary cam
program
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
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English (en)
French (fr)
Other versions
EP0025470A1 (de
EP0025470B1 (de
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/de
Publication of EP0025470A1 publication Critical patent/EP0025470A1/de
Application granted granted Critical
Publication of EP0025470B1 publication Critical patent/EP0025470B1/de
Publication of EP0025470B2 publication Critical patent/EP0025470B2/de
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 ans 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 timer especially for household appliances in which a main cam (36) and a shaft (10) are rotatable by a motor, an auxiliary cam (40) being coupled to said shaft (10) so as to rotate with the shaft (10) to enable selection of an auxiliary program, the shaft (10) also being movable axially to energize the motor, such axial movement enabling an axial translation of the auxiliary cam (40) relative to a control lever (50) operating a switch (52, 54, 55) concerned with the auxiliary program, the auxiliary cam having a circumferential profile (44) which determines the auxilary program and which includes a smaller radius portion (46) dimensioned not to be engagable with said control lever (50) and a larger radius portion (42) which can engage said lever (50), and when engaging it making it operate as a cam follower on the auxiliary cam (40); characterized in that only when either a rotational movement to select an auxiliary program, or a motor-driven rotation, of the shaft (10) and hence of
  • 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 a 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 stucture 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 a and ⁇ , 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 + ⁇ , 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 (6)

1. Zeitschalter, insbesondere für Haushaltgeräte, mit einem eine Nockenscheibe (36) und eine drehbar mit einer Hilfsnockenscheibe (40) gekuppelte Welle (10) antreibenden Motor, wobei die Welle (10) sowohl zur Auswahl eines Zusatzprogramms drehbar und zum Anschalten des Motors axial bewegbar ist und die Axialbewegung eine axiale Verschiebung der Hilfsnockenscheibe (40) relativ zu einem Steuerhebel (50) zur Betätigung eines Schalters (52, 54, 55) für das Zusatzprogramm bewirkt und wobei das Umfangprofil (44) der Hilfsnockenscheibe (40) zum Bestimmen des Zusatzprogramms einen Bereich (46) von vermindertem Radius aufweist, der einen Angriff an dem Steuerhebel (50) unmöglich macht, während ein Bereich (42) von grösserem Radius einen Angriff an dem Steuerhebel (50) gestattet, und wenn im Angriff mit Hebel (50) kommt, wirkt der Hebel als eine Nockenstössel auf die Hilfsnockenscheibe (40), dadurch gekennzeichnet, dass infolge entweder einer Drehbewegung zur Auswahl eines Zusatzprogramms oder einer von dem Motor veranlassten Drehung der Welle (10) und damit der Hilfsnockenscheibe (40) der Bereich (46) von vermindertem Radius mit dem Steuerhebel (50) fluchtet und dadurch eine axiale Verschiebung der Hilfsnockenscheibe (40) ermöglicht ist und darauf das Zusatzprogramm anläuft, wobei der Steuerhebel (50) als Nockenstössel gegenüber der Hilfsnockenscheibe (40) wirkt.
2. Zeitschalter nach Anspruch 1, dadurch gekennzeichnet, dass der Steuerhebel (50) zwei Schaltstellungen aufweist und gegenüber der ersten Stellung vorgespannt ist, die er einnimmt, wenn entweder der Bereich (46) mit vermindertem Radius der Hilfsnockenscheibe (40) axial mit dem Steuerhebel (50) fluchtet oder wenn das Rad die Axialbewegung deshalb nicht Auszuführen vermag, weil wegen des Anschaltens ein axiales Fluchten verhindert ist.
3. Zeitschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die axiale Bewegung der Welle (10) gegenüber einem axial festen Teil (22) einen Anschlagring (26) von der Hilfsnockenscheibe (40) löst und, im Falle des axialen Fluchtens, die axiale Bewegung der Hilfsnockenscheibe (40) gegenüber einer sich an dem axial festen Teil (22) abstützenden Feder ermöglicht, dass der axial feste Teil (22) mit der Welle (10) drehbar ist und einen oder mehrere dem Hauptprogramm zugeordnete Nocken (36) trägt.
4. Zeitschalter nach Anspruch 3, dadurch gekennzeichnet, dass an dem axial festen drehbaren Teil (22) angeordnete, sich axial erstreckende Elemente (30) in einem an der Welle angeordneten Flansch (24) vorgesehene Öffnungen (28) bis zum Anschlag an dem Schaltergehäuse (K) durchseten, wobei der Flansch (24) den axial festen Teil (22) in Umdrehung versetzt.
5. Zeitschalter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Steuerhebel (50) an einer Blattfeder (48) befestigt ist, die radial flexibel und axial starr gegenüber der Hilfsnockenscheibe angeordnet ist und den beweglichen Teil (55) eines elektrischen Schalters (52, 54) bildet, wobei der Hebel (50) mit der Schulter des den grösseren Radius aufweisenden Teils (42) der Hilfsnockenscheibe (40) zusammenwirkt, um diese gegen die Wirkung der Feder (38) abzustützen.
6. Zeitschalter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass ein der Hilfsnokkenscheibe zugeordnetes und bei einem axialen Fluchten des den kleineren Radius aufweisenden Bereichs (46) mit dem Steuerhebel (50) ausgelöstes Programm mit dem Programm des oder der Hauptnockenscheibe (36) integriert ist.
EP19790830029 1979-09-18 1979-09-18 Zeitschalter, insbesondere für Haushaltsgeräte Expired EP0025470B2 (de)

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 (de) 1979-09-18 1979-09-18 Zeitschalter, insbesondere für Haushaltsgeräte

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19790830029 EP0025470B2 (de) 1979-09-18 1979-09-18 Zeitschalter, insbesondere für Haushaltsgeräte

Publications (3)

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

Family

ID=8186541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790830029 Expired EP0025470B2 (de) 1979-09-18 1979-09-18 Zeitschalter, insbesondere für Haushaltsgeräte

Country Status (2)

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EP (1) EP0025470B2 (de)
DE (1) DE2965825D1 (de)

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 (de) * 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 (de) * 1974-05-14 1977-06-24 Carpano & Pons
GB1468863A (de) * 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
EP0025470A1 (de) 1981-03-25
EP0025470B1 (de) 1983-07-06

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