Wash program selection and indexing apparatus

• US 3,937,981 A
• Filed: 03/22/1974
• Issued: 02/10/1976
• Est. Priority Date: 03/22/1974
• Status: Expired due to Term

• Current Assignee: Ecolab, Inc.
• Original Assignee: Ecolab, Inc.
• Inventors: Dillon, Roger L., Nystuen, Marcus I.
• Primary Examiner(s): Scott, James R.
• Application Number:
  US05/453,716
• Time in Patent Office: 690 Days
• Field of Search: 200/38 B, 200/38 C, 307/139, 307/141, 307/141.4, 68/12 R, 134/58 R, 134/58 D, 134/58 DL, 134/56, 134/57 R, 318/487, 318/284, 317/137, 317/139, 317/141, 317/154
• US Class Current: 307/141
• CPC Class Codes: G05B 19/106 for selecting a programme, variable or parameter
• CPC Class Codes: G05B 19/108 characterised by physical layout of switches; switches co-operating with display; use of switches in a special way
• CPC Class Codes: G05B 2219/23175 What to display: program channels, running of program
• CPC Class Codes: H01H 43/10 with timing of actuation of contacts due to a part rotating at substantially constant speed

Abstract

Apparatus and logic circuitry for selection of a desired wash program in a laundry machine in which multiple programs are available and occupy zones of varied extent on a continuous program surface. An indexing surface is connected to and moves with the program surface. The indexing surface is divided into a plurality of tracks, each of which is marked to identify the position and extent of a distinct program encoded on the program surface. Individual pushbutton selection switches provide power to enable individual sensing switches paired with the tracks. An enabled switch senses the markings defining the program selected by actuation of a particular pushbutton. The pushbutton switch enabling an individual sensing switch also actuates an indexing drive which rapidly and automatically drives the indexing surface to a position where the enabled sensing switch senses a program point corresponding to the beginning of the selected program. The sensing switch then disconnects indexing drive and engages a timer motor, also enabling means responsive to the information encoded on the program surface so that the selected program may be performed.

Claims

1. Wash program controller apparatus for a laundry machine of the type having a plurality of subsystems each operable to perform a unique laundering function, comprising:

a. means for automatically activating said plurality of subsystems to execute a plurality of distinct laundering programs, comprising;

i. first triggering apparatus defining an encoded movable program surface continuously disposed in the direction of movement thereof, having a plurality of laterally spaced tracks each encoded with triggering elements of varied lengths in said direction of movement, wherein each of said plurality of triggering elements is identifiable with at least one of the unique laundering functions and, wherein said triggering elements of said program surface occupy zones of varying extent in said direction of motion with those said triggering elements within each zone being identifiable with a different one of said distinct laundering programs;

ii. control means operatively connectable to the plurality of subsystems and disposed to survey a portion of said encoded program surface tracks for activating responsive to movement of said triggering elements thereof said plurality of subsytems in sequential time dependent manner; and

iii. first drive means for advancing said encoded program surface relative said control means at a first rate of speed so that said control means actuates the plurality of subsystems in sequential time dependent manner; and

b. indexing means for automatically synthesizing said plurality of distinct laundering programs by selecting for execution various combinations of the plurality of laundering functions, comprising;

i. second triggering apparatus defining an encoded movable indexing surface continuously disposed in the direction of movement thereof, having a plurality of laterally spaced indexing tracks each encoded with at least one index element, said one index element of each of said indexing tracks having a predetermined positional relationship on said indexing surface corresponding to the beginning of a different one of said zones of said program surface;

ii. a plurality of sensing means, each operatively disposed relative said indexing surface to survey a different one of said indexing tracks, for sensing when activated said index elements of its surveyed track;

iii. second drive means for advancing when activated said indexing surface relative said plurality of sensing means;

iv. program selection means having a plurality of input selector means each operatively connected with a different one of said sensing means and identifiable with a different one of said laundering programs for activating in response to energization of one of said input selectors the associated single one of said sensing means and for activating said second drive means, thereby automatically advancing said indexing surface relative said sensing means until said activated sensing means senses said one index element of its surveyed indexing track, indicating the beginning of the selected laundering program zone; and

v. switching means responsive to the sensing of said one index element by said activated sensing means for deactivating said second drive means, for activating said first drive means and for actuating said control means to respond to said triggering elements within that zone defined by said sensed one index element, to execute the selected laundering program.

2. The apparatus of claim 1 including means for physically connecting said second means and said first means so that said program surface and said indexing surface move together, and wherein said first and second drive means are each connected to advance simultaneously said program surface and said indexing surface.

3. The apparatus of claim 2 wherein said program selection means includes a power source and plurality of selector switches connected in electrical parallel thereto, with each of said selector switches being operatively connected to a different one of said input selector means for activation thereby;

wherein said plurality of sensing means includes a plurality of sensing switches each of which is operatively aligned with a different one of said indexing tracks and is responsive to said index elements thereon to switch between first and second states, each of said sensing switches being connected in series to a different one of said selector switches so that actuation of a particular selector switch activates its associated sensing switch by connection of said power source thereto.

4. The apparatus of claim 3 wherein each of said sensing switches is connected so that, when activated and operative in its said first state, it provides a conductive path for energization of said second drive means to drive said movable program surface at a second rate of speed, faster than said first rate of speed, and when activated and operative in its said second state, provides a conductive path for energization of said first drive means.

5. The apparatus of claim 4 wherein said second drive means includes a drive motor for driving said first and second triggering apparatus and wherein said switching means comprises a first relay operatively connected for energization by said sensing switches when one of said sensing switches is activated in said first state, said first relay having a set of normally open contacts operatively connected for providing power therethrough to said drive motor during energization of said first relay.

6. The apparatus of claim 5 wherein said switching means includes a second relay connected for energization by said sensing switches when one of said sensing switches is activated in said second state, said second relay having a first set or normally open contacts operatively connected for providing power to said first drive means during energization of said second relay.

7. The apparatus of claim 6 wherein said second relay has a second set of normally open contacts operatively connected for providing actuation power to said control means during energization of said second relay.

8. The apparatus of claim 7 wherein said control means includes a control relay connected to said second set of normally open contacts of said second relay and a plurality of individual program switches at least one of said program switches being operatively aligned with each of said spaced tracks of said program surface each of said program switches being responsive to movement of said triggering elements within its associated said program surface track to control at least one of said laundry machine subsystems for performing the associated ones of said unique laundering functions when activated by said control relay.

9. The apparatus of claim 4 wherein each of said indexing tracks is contoured with areas of differing height, wherein said sensing switches are characterized by contact fingers spring-biased to follow said track contours and to switch said sensing switches between their said first and second states in response thereto, and wherein said index elements are defined by changes in said track contours.

10. The apparatus of claim 9 wherein each indexing track has a contour characterized by a first segment of a first height which occupies a portion of the track length and a second segment of a second height different from said first height which occupies the remainder of the track length with transition portions between said first and second segments whose positional relationship to said program surface defines the beginning and end of the laundering program corresponding thereto.

11. The apparatus of claim 9 wherein said first triggering apparatus and said second triggering apparatus comprise a cylindrical member mounted for rotation about its longitudinal axis, and wherein said program surface and said indexing surface comprise axially spaced portions of the exterior surface of the cylindrical member.

12. The apparatus of claim 11 wherein said second triggering apparatus further comprises a sheet of material bearing said encoded indexing elements and means for removably mounting said sheet to the external surface of said cylindrical member to define said indexing surface.

13. The apparatus of claim 12, wherein said sheet contains a plurality of slots defining said plurality of encoded indexing elements and wherein said contact fingers of said sensing switches engage one surface of said sheet and are operatively activated by said slots.

14. The apparatus of claim 9, wherein each of said indexing tracks has a contour characterized by a first segment of a first height which occupies a portion of the respective track length and a second segment of a height different from said first height which occupies the remainder of the respective track length, and wherein said contact fingers of said sensing switches include sloped portions engaging respective ones of said indexing track contours for causing said sensing switches to gradually respond to transition portions of said contours of said indexing tracks between their said first and second segments.

15. The apparatus of claim 9, wherein said second triggering apparatus further comprises a sheet of material bearing said encoded indexing elements and means for mounting said sheet for operative movement relative said plurality of sensing means.

16. In fabric washing apparatus having a program band having a continuous program surface encoded with a plurality of program triggering elements occupying zones of varying extent about the program surface each of the program triggering elements being associated with at least one laundering function, and control means operatively connected to survey the continuous program surface and being responsive, when activated, to the encoded program triggering elements to cause said washing apparatus to sequentially preform selected ones of the laundering functions in time dependent manner as the program band is advanced, the improvement comprising:

a. a continuous indexing band connected to said program band to advance therewith, said indexing band being divided into a plurality of laterally spaced tracks extending longitudinally about said band, each of said tracks being characterized by indexing elements thereon marking the start and end of a different laundry program defined by the program triggering elements representing laundry functions encoded within one of the zones on said program band whose longitudinal extent corresponds to the spacing of said indexing elements within that associated track and has a predetermined longitudinal position with respect thereto;

b. a plurality of individual sensing means each operatively mounted in fixed position relative a different one of said tracks and disposed to survey a small area of its associated said track, for sensing when energized said indexing elements of its associated said track within said surveyed area thereof;

c. a plurality of manually operated input selector switching means, one each of said selector switching means being operatively connected with a different one of said sensing means, for selectively energizing in response to manual stimulation thereof said sensing means, each of said switching means being operative upon stimulation thereof to energize a different one of said sensing means;

d. motor means, responsive to energization of any one of said sensing means, for moving said indexing band relative said sensing means;

e. means, responsive to each of said sensing means for activating the control means upon the sensing of one of said indexing elements by any one of said energized sensing means; and

f. timer means, responsive to each of said energized sensing means upon the sensing thereof of their respective said indexing elements for moving said program band relative said control means in time dependent fashion to sequentially execute the laundering functions of the selected said laundry program.

17. The apparatus of claim 16 wherein said plurality of individual sensing means comprise a plurality of single pole, double throw sensing switches, each having a first and a second throw terminal and a common terminal, wherein said motor means includes an indexing drive relay operatively connected to said first terminal of each of said sensing switches, wherein said timer means includes a timer relay operatively connected to said second terminal of each of said sensing switches, and wherein said common terminal of each of said sensing switches is operatively connected for energization by one of said manually operated input selector switching means.

18. The apparatus of claim 17 wherein each of said sensing switches further has an actuator lever riding in contact with an associated one of said tracks, each of said levers being responsive to the indexing elements encoded on its associated track to switch the sensing switch associated therewith.

19. The apparatus of claim 18 wherein said indexing elements are defined by variations in the contour and height of said tracks.

20. The apparatus of claim 17 wherein said plurality of manually operated input selector switching means comrpise a plurality of individual pushbutton switches, a power source, operatively connected with each of said pushbutton switches, and means for connecting said common terminal of each of said sensing switches to said power source through a different one of said pushbutton switches.

21. The apparatus of claim 20 wherein said plurality of manually operated input selector switching means further includes a plurality of hold-in relays each associated with a different one of said pushbutton switches for energization therethrough, each of said hold-in relays having a set of normally open contacts operatively connected in parallel with its associated pushbutton switch.

22. The apparatus of claim 20 wherein said timer relay further has a pair of normally closed contacts and wherein said power source is operatively connected to said plurality of pushbutton switches through said pair of normally closed contacts of said timer relay.

23. In a laundry machine control system of the type having a laundry cycle controller including first means defining a continuous movable program surface encoded with a plurality of laterally spaced groups of laundry function triggering elements occupying zones of different lengths in the direction of movement of the program surface, with the zone lengths being dependent upon the desired execution time for the associated laundry function, timing means for advancing the encoded program surface relative a sensing area, and sensing control means for surveying the program surface at the sensing area and responsive to the encoded triggering elements to sequentially drive a laundry machine through the laundry functions at a rate dependent upon the speed of movement of the program surface, laundry program indexing and selection apparatus for automatically synthesizing distinct laundry programs from selected ones of the laundry function, comprising:

a. second means defining a continuous movavle indexing surface, operatively subdivided into a plurality of laterally spaced program tracks, each track having a portion of its total length encoded with indexing elements of varied lengths in predetermined position relative selected ones of the laundry function indexing elements of the program surface and defining a different laundry program of related extent on the program surface;

b. means operatively connecting said second means for simultaneously advancing said indexing surface for movement with said program surface by the timing means;

c. a plurality of switching means one each of said switching means being positioned relative a different one of said indexing tracks for sensing said encoded indexing elements thereof each of said switching means being normally operative in a first state and being operable in response to detection of said indexing elements in its associated track to change from said first state to a second state in response thereto when the sensed indexing element has a particular positional relationship to its associated switching means;

d. program selection means for providing power to a selected one of said switching means associated with a desired program track;

e. indexing drive means connected to said plurality of switching means, and responsive to the selected energized one of said switching means for advancing said program and indexing surfaces at a first rate of speed when the selected energized switching means is in its said first state;

f. means operatively connected to said plurality of switching means for preventing the sensing control means from driving the laundry machine while said selected switching means is operative in its said first state; and

g. means responsive to an energized switching means operative in its said second state for energizing said timing means, whereby said first and said second means are driven at a second slower time dependent speed while indexing element bearing portions of said program track are in said particular positional relationship to said energized switching means.

24. The appatatus of claim 23 wherein said energized switching means resumes operation in its said first state to drive said indexing drive means after the sensed indexing element of the track associated therewith moves past said energized switching means, and wherein said apparatus includes limit stop means for de-energizing said indexing drive means after all triggering elements encoded on the program surface have passed said sensing means.

25. The apparatus of claim 24 wherein said indexing surfaces includes a limit stop track laterally spaced from said program tracks having a limit stop indexing element thereon, and wherein said limit stop means includes a stop switch operatively mounted in proximity with said limit stop track, responsive to sensing of said limit stop index element to de-energize said indexing drive means.

26. The apparatus of claim 23 wherein the laundry cycle controller of the laundry machine control system is of the type characterized by said first means comprising a generally cylindrical drum having a first continuous band connected about its external surface and defining the program surface, wherein said laundry function triggering elements encoded on said first band occupy zones of different arc lengths thereon, wherein the timing means rotates the cylindrical drum about its longitudinal axis, and wherein the laundry program indexing and selection apparatus is further characterized by said second means comprising a continuous indexing band connected about the surface of said cylindrical drum and forming said indexing surface and means for removably mounting said indexing band to the external surface of said cylindrical drum.

27. The apparatus of claim 23 wherein said second means comprises a sheet of material defining said continuous movable indexing surface and bearing said encoded indexing elements, and means for mounting said sheet for operative movement relative said plurality of switching means.

28. The apparatus of claim 27, wherein said sheet contains a plurality of slots defining said encoded indexing elements and wherein each of said switching means includes a switching arm disposed to engage one surface of said sheet and movable in response to engagement of said slots therein to operate their respective said switching means.