EP0526380A1 - Mécanisme d'avancement pas à pas pour dispositif de commande à programme - Google Patents

Mécanisme d'avancement pas à pas pour dispositif de commande à programme Download PDF

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Publication number
EP0526380A1
EP0526380A1 EP92500098A EP92500098A EP0526380A1 EP 0526380 A1 EP0526380 A1 EP 0526380A1 EP 92500098 A EP92500098 A EP 92500098A EP 92500098 A EP92500098 A EP 92500098A EP 0526380 A1 EP0526380 A1 EP 0526380A1
Authority
EP
European Patent Office
Prior art keywords
cam
elevating lever
ratchet
cogs
timer
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.)
Granted
Application number
EP92500098A
Other languages
German (de)
English (en)
Other versions
EP0526380B1 (fr
Inventor
José Cruz Leibar Guridi
Michel Chauvigne
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.)
Fagor Electrodomesticos SCL
Original Assignee
Fagor Electrodomesticos SCL
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 Fagor Electrodomesticos SCL filed Critical Fagor Electrodomesticos SCL
Publication of EP0526380A1 publication Critical patent/EP0526380A1/fr
Application granted granted Critical
Publication of EP0526380B1 publication Critical patent/EP0526380B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 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
    • H01H43/101—Driving mechanisms
    • H01H43/102—Driving mechanisms using a pawl and ratchet wheel mechanism

Definitions

  • the present invention relates to a number of improvements to the step-by-step timer switch activation system for program control devices subject of European Patent application 92500004.4 dated 14th January 1992, such improvements being aimed at eliminating possible functional anomalies in the said system.
  • Step-by-step timer switch activation systems for program control devices exist, for instance as in the same applicants' European Patent application 92500004.4 dated 14th January 1992, such system comprising two subsystems that can act jointly or separately, with one of which subsystems time intervals of a duration equivalent to the turning period of the fast cam or fractions thereof can be obtained, and with the second of which any of the time intervals of the first subsystem can be multiplied by two preset factors.
  • the device subject of this addition is designed so that even if such event does come about the drum of program cams shall not be permanently stopped in the said position, allowing the driving mechanisms to act upon the same and move it towards a stable position so that it may thereafter resume its normal operation.
  • a second advantage of the system lies in that though its actuation is linked to the movement of the positioning ratchet by cogs integral with the drum of program cams, the strength with which the same impinges upon the latter is only slight, thereby facilitating the obtention of low turning torques of the said drum of program cams if so desired.
  • the system is designed such that when the drum of program cams moves one step forward by hand or automatically, the cogs integral with the latter usually and conventionally cause a positioning ratchet to rise and fall.
  • This movement in turn causes an elevating swivel lever to be reset, the free end of which lever is subsequently driven by a transmission element driving the same from time to time, the period being under or equal to the period of duration of the shortest timing, so that moving the lever counter the reset travel direction causes the ratchet holding the timer wheel to draw away at a time when the driving pawl is also drawn away therefrom, whereupon the same is free to be reset.
  • the device shall then be able to work again, according to the parameters corresponding to the angular position of the drum of program cams.
  • Figure 1. Is the system disposed for basic timings or fractions thereof.
  • Figure 2.- Is the system just as it moves to a multi-timing position.
  • Figure 3.- Is the timer cam and the advancing pawl in a multi-timing process.
  • Figure 4.- Shows the system in an intermediate step position at the end of a multi-timing period.
  • Figure 5.- Is the reset system of the timer cam in a reset position.
  • the selection lever follower (7) When the system moves to a multi-timing position, figure 2, the selection lever follower (7) is placed at a level (16) or (17) other than that (9) of widest radius, causing the selection lever (8) to swing about its turning centre (18), overcoming the force of the spring (19) that opposes such movement.
  • the follower (7) moves to either of the two levels other than (9) it also displaces the abutment (38) integral with the selection lever (8), which in turn impinges upon a profile (21) on the timer cam to move the latter to an angular position that is slightly more advanced than that corresponding to the position with no multi-timing of figure 1.
  • the boss (11) on the elevating lever (12) takes up, as shall be explained hereinafter, its active position, before the end (14) of the anti-return ratchet (15) to move soon after, as shall also be explained hereinafter, to the position shown in figure 1.
  • the movement of the boss (11) on the elevating lever from the position of figure 2 to that of figure 1 is aimed at resetting the timer cam (6) but as in this case it is already in its starting position or at rest, it bears no effect upon the same.
  • FIG 4 shows the system in an intermediate step position, i.e., between two stable positions, where the positioning ratchet (23) can be seen located upon the tip of the cogs (10) on the block of program cams.
  • the elevation of the positioning ratchet (23) from the bottom to the tip of the cogs (10) on the block of program cams causes the elevating lever (12), which is disposed to swing about a shaft (25) integral with the positioning ratchet (23), to move in the direction of the arrow (24).
  • This displacement causes the boss (11) on the elevating lever (12) to be drawn away from the end (14) of the anti-return ratchet, allowing the elevating lever to move from the position of figure 1 to that of figure 2, by means of a spring (26) that urges the same towards the latter, the system then moving forthwith to the position shown in figure 5.
  • Figure 5 shows how, after the block of program cams (5) moves one step forward, the catch (4) on the driving pawl shall have been drawn away from the cogs that it drives, such withdrawal being caused jointly by the rotation of the excentric (1) in the direction of the arrow and the spigot (27) integral with the bearing plate (28) driving an internal profile (29) of the driving pawl (3), overcoming the force of the spring (30) that tends to draw the catch towards the said cogs.

Landscapes

  • Measurement Of Predetermined Time Intervals (AREA)
  • Transmission Devices (AREA)
  • Electromechanical Clocks (AREA)
EP19920500098 1991-08-02 1992-07-28 Mécanisme d'avancement pas à pas pour dispositif de commande à programme Expired - Lifetime EP0526380B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9101817A ES2034919A6 (es) 1991-08-02 1991-08-02 Mejoras introducidas en la patente de invencion 9100369 por: "sistema de accionamiento temporizado paso a paso de dispositivos de mando por programa.
ES9101817 1991-08-02

Publications (2)

Publication Number Publication Date
EP0526380A1 true EP0526380A1 (fr) 1993-02-03
EP0526380B1 EP0526380B1 (fr) 1996-06-12

Family

ID=8273222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920500098 Expired - Lifetime EP0526380B1 (fr) 1991-08-02 1992-07-28 Mécanisme d'avancement pas à pas pour dispositif de commande à programme

Country Status (3)

Country Link
EP (1) EP0526380B1 (fr)
DE (1) DE69211440D1 (fr)
ES (1) ES2034919A6 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2150471A1 (de) * 1971-05-18 1972-11-30 Holzer Patent Ag Motorgetriebene Programmsteuerung
DE2806258A1 (de) * 1978-02-15 1979-08-23 Eaton Gmbh Programmschaltwerk fuer waschmaschinen, geschirrspuelmaschinen u.dgl.
DE3809399A1 (de) * 1988-03-21 1989-10-05 Ako Werke Gmbh & Co Programmschaltwerk

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2150471A1 (de) * 1971-05-18 1972-11-30 Holzer Patent Ag Motorgetriebene Programmsteuerung
DE2806258A1 (de) * 1978-02-15 1979-08-23 Eaton Gmbh Programmschaltwerk fuer waschmaschinen, geschirrspuelmaschinen u.dgl.
DE3809399A1 (de) * 1988-03-21 1989-10-05 Ako Werke Gmbh & Co Programmschaltwerk

Also Published As

Publication number Publication date
DE69211440D1 (de) 1996-07-18
ES2034919A6 (es) 1993-04-01
EP0526380B1 (fr) 1996-06-12

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