US3760644A - Variable speed stepwise power feed device - Google Patents

Variable speed stepwise power feed device Download PDF

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Publication number
US3760644A
US3760644A US00216453A US3760644DA US3760644A US 3760644 A US3760644 A US 3760644A US 00216453 A US00216453 A US 00216453A US 3760644D A US3760644D A US 3760644DA US 3760644 A US3760644 A US 3760644A
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US
United States
Prior art keywords
axis
wheel
cam
plate
wedges
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
US00216453A
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English (en)
Inventor
Davin J Jullien
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.)
Thales Avionics SAS
Original Assignee
Crouzet SA
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 Crouzet SA filed Critical Crouzet SA
Application granted granted Critical
Publication of US3760644A publication Critical patent/US3760644A/en
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
    • 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
    • H01H43/02—Details
    • 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
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1503—Rotary to intermittent unidirectional motion
    • 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
    • Y10T74/19—Gearing
    • Y10T74/1987—Rotary bodies
    • Y10T74/19879—Geneva

Definitions

  • ABSTRACT Variable speed stepwise power feed device for a programmer of the class comprising motor means, a cam unit integral with a ratchet iron wheel on which a feed pawl can act which is actuated by an eccentric from said motor means, the engagement of said pawl with said ratchet iron wheel being controlled by a disengaging cam, the improvement which consists in that said disengaging cam is integral in rotation with a star wheel wedged on an axis turning freely in a bearing, said axis being free to move, from a non-meshing position, so as to bring the star wheel more or less near a plate driven into continuous rotation from said motor means and comprising two sets of wedges arranged concentrically on said plate so that the star whee
  • This invention relates to a stepwise power feed device which makes it possible to vary within certain limits, the time base, i.e., the frequency, of pitch passage.
  • This device is applicable, in particular, to the control of the cam unit of programmers designed for automatic washing machines.
  • the device according to the invention makes it possible, using simple means, to select several fixed pitch passage frequencies during the completion of the cycle of an automatic washing machine programmer.
  • the invention relates to a variable speed stepwise power feed device for a programmer comprising motor means, a cam unit integral with a ratchet iron wheel on which an advance pawl can act which is actuated through an eccentric from said motor means, the engagement of said pawl with said ratchet wheel being controlled by a disengaging cam, which device is characterized by the fact that said disengaging cam is integral in rotation with a star wheel wedged on an axis turning freely in a bearing, said axis being free to be moved, from a non-meshing position, in order to bring said star wheel more or less near a plate driven into continuous rotation from said motor means and presenting at least two sets of wedges arranged concentrically on said plate so that the star wheel, depending on the degree of approach with respect to said plate, meshes with the nearest set of wedges or simultaneously with the two nearest sets of wedges and is driven at different speeds.
  • FIGURE illustrates, by way of example, an embodiment of the device according to the invention which makes it possible to obtain various stepwise feed frequencies in ratios of H1, H2 and 1/4.
  • a plate 2 integral with axis 11 comprises two sets of four pairs of wedges 2a and 2b, with each set being arranged respectively on two radii R, and R of plate 2.
  • the wedge pairs 2a on radius R are arranged at 90 from one another as well as the wedge pairs 2b on radius R
  • wedge pairs 2a and wedge pairs 2b are staggered angularly with respect to one another, for example, by 45".
  • an eccentric acts on a pawl 8, which, through its nose 8a, in a manner known per se, providesfor the stepwise feed of a ratchet iron wheel 5 integral with the cam unit, on an axis 10, a first cam 4 of which (the only one shown in the FIGURE) acts as a selection cam.
  • the cam 4 indeed, has a three level profile N N and N;, which is followed by a lever 3b.
  • the angular position of this lever around an axis 3 acts on arm 3a, which is integral as well with axis 3, supporting an eight toothed star wheel 1 which is integral, through a rod 7, with a cam 6.
  • Cam 6, which rotates concentrically with respect to wheel 1 has a cut-out 6a over a quarter of its periphery.
  • the pawl 8 has an arm 8b which, cooperating with cam 6, induces the clearance of nose 8a from wheel 5 throughout three quarters of the rotation of said cam 6.
  • Three stepwise feed rates correlate with the three positions which may be taken by sensing lever 3b on selection cam 4.
  • the position of wheel 1 correlates with the average radius N of the selection cam such that said position meshes only with wedges a located on the largest radius R, of plate 2.
  • wheel 1, and therefore cam 6, also performs a rotation, the ratio of the radii of wheel 1 and of plate 2 being chosen to this effect, but pawl 8 will only act once on wheel 5 upon passage of notch 6a in front of arm 8b.
  • wheel 1 when wheel 1 is in its lowest postion (correlating with the minimal level N of 3b on selection cam 4), it performs two rotations for each rotation of plate 2, for it is in meshing engagement with all wedges 2a and 2b of said plate. Under these conditions, since cam 6 performs two rotations as well, the pawl will act twice on wheel 5 for one rotation of axis 11, driving the plate.
  • the device according to the invention is particularly well suited to the stepwise power feed control of cam units of automatic washing machine programmers for the purpose of obtaining various feed rates as a function of a predetermined diagram, which feed rates are controlled by a selection cam integral with the cam units.
  • a ratchet iron wheel for a programmer, a ratchet iron wheel, a pawl cooperable with the teeth of the ratchet wheel to turn the wheel, a cam unit serving as a selecting cam integral with the ratchet wheel, a disengaging cam for controlling engagement of the pawl with the ratchet wheel
  • the improvement including a star wheel, said star wheel being mounted on a freely rotating axis, a plate integral with a second axis parallel to the first axis, two sets of wedges arranged concentrically on the plate, and said axis being movable from a position in which the star wheel is out of operative engagement with the plate to a position, dependent upon the degree of approach of the star wheel, in which the star wheel meshes with the nearest set of wedges or simultaneously with the two nearest sets of wedges and is driven at different speeds, and means moving the freely rotating axis relative to the second axis.
  • the means for moving the freely rotating axis relative to the second axis includes a sensing lever urged into engagement with the profile of the selection cam, a third axis on which said sensing lever is secured.

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  • Transmission Devices (AREA)
US00216453A 1971-01-19 1972-01-10 Variable speed stepwise power feed device Expired - Lifetime US3760644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7101879A FR2132494B1 (cg-RX-API-DMAC10.html) 1971-01-19 1971-01-19

Publications (1)

Publication Number Publication Date
US3760644A true US3760644A (en) 1973-09-25

Family

ID=9070606

Family Applications (1)

Application Number Title Priority Date Filing Date
US00216453A Expired - Lifetime US3760644A (en) 1971-01-19 1972-01-10 Variable speed stepwise power feed device

Country Status (5)

Country Link
US (1) US3760644A (cg-RX-API-DMAC10.html)
DE (1) DE2200012C3 (cg-RX-API-DMAC10.html)
FR (1) FR2132494B1 (cg-RX-API-DMAC10.html)
GB (1) GB1377582A (cg-RX-API-DMAC10.html)
IT (1) IT944600B (cg-RX-API-DMAC10.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050020912A1 (en) * 2003-06-20 2005-01-27 Kiraly Atilla Peter Method and system for response image feature collection and candidate summit, surface, and core estimation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES426521A2 (es) * 1974-05-21 1977-06-16 Copreci Ind Sci Sistema de accionamiento paso a paso de medios de soporte deprogramas con intervalos de parada seleccionables de dura- ciones variables.
DE2806258C2 (de) * 1978-02-15 1987-01-22 Eaton GmbH, 7778 Markdorf Programmschaltwerk für Waschmaschinen, Geschirrspülmaschinen od.dgl.
FR2630557B1 (fr) * 1988-04-25 1992-02-14 Crouzet Sa Programmateur pour machines electrodomestiques

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2106042A (en) * 1932-03-08 1938-01-18 Gen Electric Coin controlled time switch
US2128858A (en) * 1935-01-25 1938-08-30 Gen Electric Coin time switch
US2680164A (en) * 1952-03-19 1954-06-01 Gen Electric Contact speed control in springdriven step type switches
DE916740C (de) * 1952-12-20 1954-08-16 Peltzer & Ehlers Getriebe zur Umsetzung fortlaufender Drehung in solche mit Ruhepausen
US3648529A (en) * 1970-01-29 1972-03-14 Mallory & Co Inc P R Intermittent motion transmission

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2106042A (en) * 1932-03-08 1938-01-18 Gen Electric Coin controlled time switch
US2128858A (en) * 1935-01-25 1938-08-30 Gen Electric Coin time switch
US2680164A (en) * 1952-03-19 1954-06-01 Gen Electric Contact speed control in springdriven step type switches
DE916740C (de) * 1952-12-20 1954-08-16 Peltzer & Ehlers Getriebe zur Umsetzung fortlaufender Drehung in solche mit Ruhepausen
US3648529A (en) * 1970-01-29 1972-03-14 Mallory & Co Inc P R Intermittent motion transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050020912A1 (en) * 2003-06-20 2005-01-27 Kiraly Atilla Peter Method and system for response image feature collection and candidate summit, surface, and core estimation
US7577298B2 (en) * 2003-06-20 2009-08-18 Siemens Medical Solutions Usa, Inc. Method and system for response image feature collection and candidate summit, surface, and core estimation

Also Published As

Publication number Publication date
FR2132494B1 (cg-RX-API-DMAC10.html) 1973-12-28
FR2132494A1 (cg-RX-API-DMAC10.html) 1972-11-24
DE2200012C3 (de) 1975-02-20
DE2200012A1 (de) 1972-08-03
IT944600B (it) 1973-04-20
GB1377582A (en) 1974-12-18
DE2200012B2 (de) 1973-02-08

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