US3032617A - Apparatus for controlling fully automatic washing machines - Google Patents

Apparatus for controlling fully automatic washing machines Download PDF

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Publication number
US3032617A
US3032617A US828811A US82881159A US3032617A US 3032617 A US3032617 A US 3032617A US 828811 A US828811 A US 828811A US 82881159 A US82881159 A US 82881159A US 3032617 A US3032617 A US 3032617A
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US
United States
Prior art keywords
contact
housing
arms
control disc
disc
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
US828811A
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English (en)
Inventor
Holzer Walter
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DEH36523A external-priority patent/DE1254113B/de
Priority claimed from DE1959H0036663 external-priority patent/DE1232101B/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3032617A publication Critical patent/US3032617A/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 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
    • H01H43/124—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 disc
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Program-control systems
    • G05B19/02—Program-control systems electric
    • G05B19/04—Program control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/12—Program control other than numerical control, i.e. in sequence controllers or logic controllers using record carriers
    • G05B19/126—Program control other than numerical control, i.e. in sequence controllers or logic controllers using record carriers using cards, tapes or discs having protuberances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/60—Angularly-movable actuating part carrying no contacts
    • H01H19/63—Contacts actuated by axial cams

Definitions

  • Control units for controlling fully automatic washing machines are known in which cams moving in adjacently disposed concentric tracks operate resilient contact levers mounted at one end.
  • control disc with contacts and housing so that the metal parts can be produced by means of non-cutting operation and the housing and control disc are made of pressed material such as plasters.
  • a further object is to provide a mounting of economical and simple design, but sufficiently accurate to insure a high degree of operational safety and accuracy particularly in the case of washing machines where much vibration occurs.
  • the solution of the problem according to this invention comprises resilientlymounting the upright rigid contact arms in semivopen bearings and the rigid control disc is adapted to run resiliently on balls which support the control disc over the greater part of its diameter.
  • the contact arms are not rigid but resilient.
  • the control disc is also resilient.
  • the accuracy in the co-operation between contact levers and control disc is achieved by a ball mounting, i.e. balls running in a cage, andthe control disc is resiliently urged against these balls.
  • control disc It is then unnecessary for the control disc to be mounted in the exact center.
  • the control disc is externally retained so that contact surfaces concentric with one another are formed ina satisfactory manner.
  • a further feature consists in the fact that the circular control disc is mounted on a square base plate.
  • the adjacently disposed contact arms extend in groups parallel to the edges of the base plate, contact arms running on adjacent cam tracks each being offset by 90.
  • control disc is loaded uniformly and symmetrically by the contact arms, and the operation of the contact arms is such that there are always adequate insulation air gaps.
  • the spacing of the adjacently disposed contacts no longer determines the insulation air gaps but the contacts are arranged &- set and the air gap corresponds approximately to a quarter of the diameter of the control disc. This air gap is always sufficiently great, hence affording a considerable reaction in the cost of manufacture.
  • the contact arms With reference to the contact arms, it is important for the contact arms to be mounted at one end to have the movable contact thereon adjoining the edge transmitting the switching movement.
  • the movable contacts are pressed by a spring against a fixed stationary contact mounted in a vertical guide forv the contact arm.
  • the contact arm is thus rigid and engagement of the 'ice contacts is not made by bending the contact lever, but by spring-loading the rigid contact lever at a selected point.
  • the movable contact itself is not mounted on the tip of the contact lever, but at a different point inwardly of the cam follower on the end of the arm so that when the contact arm is urged upwardly by a cam of the control disc against the spring which acts on the contact arm, contacts are opened in a positive manner.
  • the spring rapidly closes the contacts when the contact arm leaves the cam on the control disc.
  • a further possible modification consists in the fact that centrally pivoted contact arms extend radially with respect to the control disc and that the control disc has a guide axle on the side opposite to the feeler levers.
  • the contact arms are constructed as rocker arms having a common mounting in the center and making contact on both ends. It is also possible, of course, to use two-armed arms instead of one-armed two-ended arms, so that the contacts may be moved either in conjunction with or independently of the contact on the opposite end of the contact arms.
  • a convenient mounting for the contact arms consists in the fact that semi-open bearings of the contact arms consist of a notch with a counter bearing.
  • the springs loading the contact arms are arranged a short distance from the mounting points and are supported on the housing.
  • a convenient arrangement for simple connection in a washing machine consists in the fact that all contactlevers terminate on one side of the housing in soldering lugs or terminals or plug connections.
  • This design is operationally very safe, since the sensitive parts, the cam tracks and contacts, the balls, and the springs are protected from accidental contact and dirt by the enclosing housing. Only the contact terminals are located on one side of the housing, while on the opposite side the shaft for the connection of the drive projects therefrom.
  • Additional features comprise arranging balls in the housing for supporting the control disc and, if necessary, guided in a cage, while the springs urging the disc against the balls are supported in the housing.
  • FIG. 1 shows diagrammatically a plan view of a control disc with base plate and contact arms arranged thereon;
  • FIG. 2 shows diagrammatically in side elevation the mounting of the contact arms and the contacts
  • FIG. 3 shows diagrammatically the arrangement of these components in a housing
  • FIG. 4 is a detail of the spring-loading device of the contact arms.
  • the control disc 2 in FIG. 1 is mounted on a base plate 1, which is conveniently of square shape, this control disc 2 being maintained in an approximately central position by a spindle 3 passing through a bore in the base plate 1.
  • the accuracy of operation of the control disc does not depend upon the closeness of fit of the spindle 3 in the housing 4 or the base plate 1.
  • the control disc 2 is provided in a known manner with concentric cam tracks or paths 5. It is thus possible for ten or twenty such cam tracks to be arranged in close formation, i.e. with a clearance of one or two millimeters.
  • the cam tracks are indicated only by means of circles.
  • Within these cam tracks there are formed elevations and depressions in which the contact arms a engage with their cam followers 7, the contact levers 6 being thus moved up and down in the direction of the arrow 8.
  • the contacts 9 of the contact arms are either disengaged from the fixed contact 10 or, when the cam allows by means of a corresponding depression, pressed against each other by the contact arm spring 11.
  • the contact arms themselves are prevented from tilting by a vertical guide 12, and on this guide is located a fixed contact 10.
  • a notch 13 and the corresponding projection 14 from a semi-open bearing such semi-open bearing being fixed on the housing and provided for example with a metal lug or terminal 15 as soldering lug, or the whole component may be made of metal.
  • the fixed contact 10 receives its electrical connection at the soldering lug 16.
  • the contact arms 6 are combined in groups in such a way that in one group with arms numbered 17, 18, 19, another group with arms numbered 21, 22, 23, 24, and subsequent groups with arms numbered 25, 26, 27, 28 and 29, 30, 31, 32 the differently numbered contact arms are all situated on dilferent cam tracks.
  • the following contact arms run in adjacently disposed contact tracks: 17, 21, 25, 29 or 18, 22, 26, 30 or 19, 23, 27, 31 or 20, 24, 28, 32. It will thus be apparent that the insulation air gap between two adjacent contact arms thus amounts to approximately a quarter of the circle, which is an ample gap.
  • the balls 33 which are provided and which, for example, are guided in a cage 34 or corresponding grooves in the base plate 1, insure that when the base plate 1 has been screwed together with the housing 4 at the mounting edge 35, the critical distance 36 between the inner surface of the housing and the inner surface of the base plate 1 remains constant.
  • a spring 37 also serves to press the control disc 2 against these balls.
  • the terminals are all provided on one side, only the metal lugs 15 and not the soldering lugs 16 being available in FIG. 3, while on the other side it is possible for the drive to be connected.
  • FIG. 4 also shows another possibility of mounting the contact arms.
  • a guide member 38 which terminates in a metal lug 39 on the housing.
  • the metal lug 39 extends parallel to the metal lug 15 and facilitates the connection of parallel plug sockets.
  • This guide member 38 has a recess 40.
  • This recess 40 together with the recess 41 in the contact arm, forms the guide for the contact spring 11.
  • the contact spring 11 is now situated parallel to the contact, which is formed by the contact surfaces to the notch 13 and the projection 14, so that these contact surfaces are kept apart by means of the parallel disposed spring.
  • Suitable fields of application of the present invention are all cases wherein it is intended to use concentric cam tracks for controlling fully automatic washing machines, and where it is necessary to obtain operational reliability and a cheap method of manufacture.
  • a device for controlling automatic washing machines comprising: a control disc; a plurality of concentric cam tracks on a face of said disc and having cam surfaces transverse to said disc; a plurality of flat contact arms corresponding to the plurality of said cam paths, said arms being arranged in groups around the center of the disc with the arms pertaining to each group being disposed in parallel relationship and arranged in tangential direction with respect to said disc, the flat surfaces of said arms being perpendicular to the plane of extension of the disc; a guide member for each of said contact arms and extending also transversely to said disc; a sta tionary contact on each of said guide members; a cam follower on a first end of each contact arm and engageable with a corresponding cam track whereby cam followers engaging adjacent tracks pertain to different groups; means for pivotally mounting the other end of each contact arm, the pivot axis for each contact arm extending in the plane of extension of said disc and transversely to the plane of extension of the flat contact armj a movable contact at said first end of said contact arm
  • said mounting means comprises a rounded support with a groove in said contact arm other end engaging said rounded support, said spring means being spaced from said mounting means.
  • a device as claimed in claim 1, and further comprising terminals for said stationary and movable contacts with said terminals being located on one side of said device.
  • a device as claimed in claim 1, and further comprising a housing for said device, terminals for said sta tionary and movable contacts projecting from one side of said housing and means for driving said control disc on the opposite side of said housing.
  • said supporting means comprising a plurality of ball bearings supporting the other face of said control disc, a cage retaining said ball bearings, and spring means urging said control disc against said ball bearings.
  • a device as claimed in claim 1, and further comprising a housing, there being means in said housing defining recesses, there being opposing and cooperating recesses in said contact arms, said spring means being positioned within pairs of cooperating recesses, said recess defining means being connected to said mounting means and forming with said spring means a current conducting unit.
  • a device as claimed in claim 6, and comprising a terminal on each recess defining means and extending outwardly of said housing.
  • a device as claimed in claim 6 and further comprising terminal pins extending from said recess defining means and the mounting means connected thereto to form 5 a tubular contact.
  • a device as claimed in claim 5, wherein said ball bearings engage said control disc adjacent the outer periphery thereof.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Moving Of Heads (AREA)
US828811A 1958-07-26 1959-07-22 Apparatus for controlling fully automatic washing machines Expired - Lifetime US3032617A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEH33901A DE1232100B (de) 1958-07-26 1958-07-26 Vorrichtung zum Steuern vollautomatischer Waschmaschinen
DEH36523A DE1254113B (de) 1959-06-01 1959-06-01 Vorrichtung zum Steuern vollautomatischer Waschmaschinen
DE1959H0036663 DE1232101B (de) 1959-06-15 1959-06-15 Programmschalter zum Steuern vollautomatischer Waschmaschinen

Publications (1)

Publication Number Publication Date
US3032617A true US3032617A (en) 1962-05-01

Family

ID=27210724

Family Applications (2)

Application Number Title Priority Date Filing Date
US3124667D Expired - Lifetime US3124667A (en) 1958-07-26 Holzer
US828811A Expired - Lifetime US3032617A (en) 1958-07-26 1959-07-22 Apparatus for controlling fully automatic washing machines

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US3124667D Expired - Lifetime US3124667A (en) 1958-07-26 Holzer

Country Status (5)

Country Link
US (2) US3032617A (de)
CH (1) CH373343A (de)
DE (1) DE1232100B (de)
FR (1) FR1233233A (de)
GB (1) GB893992A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3168630A (en) * 1961-11-28 1965-02-02 Holzer Walter Rotary discs and step by step drive therefor
US3172966A (en) * 1960-05-20 1965-03-09 Holzer Walter Arrangements for electrical switches
US3264442A (en) * 1963-11-27 1966-08-02 Holzer Walter Switching device using flat contact pieces
WO2008034393A1 (de) * 2006-09-22 2008-03-27 Siemens Aktiengesellschaft Antriebseinheit, insbesondere antriebskopf, mit einem um eine erste rotationsachse rotierbares erstes übertragungselement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5310940Y2 (de) * 1972-04-28 1978-03-24

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT123619B (de) * 1929-08-26 1931-07-10 Ver Telephon Czeija Nissl & Co Drehschalter.
GB599780A (en) * 1941-05-12 1948-03-19 Hazemeijer Co Improvements in or relating to electric switch contacts
US2730583A (en) * 1952-10-16 1956-01-10 Renberles Products Co Distributor plate assembly
DE959930C (de) * 1955-02-15 1957-03-14 August Stemmann O H G Fabrik E Nockenschalterelement
US2842627A (en) * 1956-02-15 1958-07-08 Wagner Tobias Traffic time signal device
US2856472A (en) * 1955-09-07 1958-10-14 Charles N Humphries Circuit breaker for internal combustion engine
US2877317A (en) * 1957-02-05 1959-03-10 Gen Electric Switching mechanism for timer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2130290A (en) * 1936-08-17 1938-09-13 Sylvan J Polta Circuit closer
FR963411A (de) * 1945-12-29 1950-07-10
US2475307A (en) * 1947-09-10 1949-07-05 Ibm Perforated record sensing device
DE957052C (de) * 1950-04-28 1957-01-31 Busch Jaeger Duerener Metall Elektrischer Nockenschalter zum wahlweisen Parallel-, Einzel- und Reihenschalten vonHeizwiderstaenden bei elektrischen Kochherden od. dgl.
US2666821A (en) * 1951-02-02 1954-01-19 Muirhead & Co Ltd Checking and control arrangement for facsimile telegraph apparatus
DE921523C (de) * 1952-01-17 1954-12-20 Busch Jaeger Duerener Metall Elektrischer Nockenschalter, bei dem ein oder mehrere Kontakthebel von einer in radialer Richtung wirkenden Steuerscheibe betaetigt werden
DE1012987B (de) * 1956-02-24 1957-08-01 Bosch Gmbh Robert Programmschaltwerk, insbesondere fuer automatische Waschmaschinen, mit Momentschaltung seines Schaltgliedes ueber einen Schrittschalter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT123619B (de) * 1929-08-26 1931-07-10 Ver Telephon Czeija Nissl & Co Drehschalter.
GB599780A (en) * 1941-05-12 1948-03-19 Hazemeijer Co Improvements in or relating to electric switch contacts
US2730583A (en) * 1952-10-16 1956-01-10 Renberles Products Co Distributor plate assembly
DE959930C (de) * 1955-02-15 1957-03-14 August Stemmann O H G Fabrik E Nockenschalterelement
US2856472A (en) * 1955-09-07 1958-10-14 Charles N Humphries Circuit breaker for internal combustion engine
US2842627A (en) * 1956-02-15 1958-07-08 Wagner Tobias Traffic time signal device
US2877317A (en) * 1957-02-05 1959-03-10 Gen Electric Switching mechanism for timer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172966A (en) * 1960-05-20 1965-03-09 Holzer Walter Arrangements for electrical switches
US3168630A (en) * 1961-11-28 1965-02-02 Holzer Walter Rotary discs and step by step drive therefor
US3264442A (en) * 1963-11-27 1966-08-02 Holzer Walter Switching device using flat contact pieces
WO2008034393A1 (de) * 2006-09-22 2008-03-27 Siemens Aktiengesellschaft Antriebseinheit, insbesondere antriebskopf, mit einem um eine erste rotationsachse rotierbares erstes übertragungselement
CN101512696B (zh) * 2006-09-22 2011-06-08 西门子公司 具有可绕第一旋转轴旋转的第一传递元件的传动单元尤其是操作头

Also Published As

Publication number Publication date
FR1233233A (fr) 1960-10-12
DE1232100B (de) 1967-01-12
GB893992A (en) 1962-04-18
CH373343A (de) 1963-11-30
US3124667A (en) 1964-03-10

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