Timing mechanism for conducting a selected one of a plurality of sequences of operation (original) (raw)

Timing mechanism for conducting a selected one of a plurality of sequences of operation Download PDF

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Publication number

US2870278A

US2870278A US700360A US70036057A US2870278A US 2870278 A US2870278 A US 2870278A US 700360 A US700360 A US 700360A US 70036057 A US70036057 A US 70036057A US 2870278 A US2870278 A US 2870278A

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United States

Prior art keywords

gear

shaft

selector

operations

framework

Prior art date

1957-12-03

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

US700360A

Inventor

Winston L Shelton

Gresham N Jennings

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General Electric Co

Original Assignee

General Electric Co

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.)

1957-12-03

Filing date

1957-12-03

Publication date

1959-01-20

1957-12-03 Application filed by General Electric Co filed Critical General Electric Co

1957-12-03 Priority to US700360A priority Critical patent/US2870278A/en

1959-01-20 Application granted granted Critical

1959-01-20 Publication of US2870278A publication Critical patent/US2870278A/en

1976-01-20 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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Description

Jan. 20, 1959 I w. 1.. SHELTON ETAL 2,370,273

TIMING MECHANISM FOR CONDUCTING A SELECTED ONE OF A PLURALITY OF SEQUENCES OF OPERATION Filed Dec. 3, 1957 FIG. I 3

F I G. 2

7 ximuu'uuu 1a 3 IN VEN TORS.

WINSTON L. SHELTON 5 GRESHAM N. J'IZNNlNOS BY w/I/IMW THE R ATTORNEY United States Patent TIMING MECHANISM FGR CONDUCTING A fiELECTED ONE OF A PLURALITY DE SE- QUENCES OF OPERATION Winston L. Shelton, Jelfersontown, and Gresham N. Jennings, Louisville, Ky., assignors to General Electric Company, a corporation of New York Application December 3, 1957, Serial N 0. 700,360 Claims. (Cl. 200-38) This invention relates to controls for a sequence of apparatus operations and, more particularly, to timing mechanismssuch as are used in connection with automatic domestic washing machines.

It is an object of our invention to provide an improved tim ng mechanism for conducting a selected one of a plurality of sequences of operations including provision for selecting the desired sequence.

Another bbiect is to provide an improved timing mechanism including an improved drive for a switch-operating earn shaft rotatable in accordance with a selected one of a plurality of sequences of operations.

Another'object is to provide an improved timing mechanisrn including provision for resetting the mechanism for a subsequent sequence of operations and for selecting the subsequent sequence of operations at the reset position.

'A further object is to provide an improved timing mechanism including provision for releasably locking a sequence'selector at a position corresponding to a sea tedque c .Q ope While the invention is particularly useful as applied to the control of a domestic washing machine, it is to be understood that this is only one application for it and that the invention may be used wherever found applicable. A'particularly diflicnlt requirement, however, is imposed upon the controls of such washing machines and the capabilities of our invention are well illustrated when applied to this particular usage. Many types of fabrics, such as found in delicate lingerie, in more durable synthetics, in woolen blankets, or in an average family wash are required to be processed in the same machine, even though the most efiicient processing of each .of these fabrics requires different times of treatment, different water temperatures, and different speeds for agitation and spinning. Thus, a plurality of sequences of operation, each of which is most suitable for a particular kind of wash, is required.

In'carrying out our invention, we satisfy this requirement by providing a timing mechanism for conducting a selected one of a plurality of sequences of apparatus operations where a main shaft, driven by a timing motor is provided with a-pluralit'y of interrupted gears. Each gear has the interruptions thereof arranged to provide a particular sequence of operations. A cam shaft is provided having suitable earn means for controlling switches in the circuits of the apparatus to be operated, and also is provided with a full gear. The full gear and the interrupted gears are linearly movable relative to eachotherin the sense that theycan be moved toward and 'away from each other as Well as having their normal rotational relationship; This permits the full gear to be selectively engageable with any one of the interrupted gears, so thatthe desired sequence of operations can be chosen.

The novel features, which we believe to be characteristic of our invention, are set forth with particularity in H the appended claims. Our invention, itself, however, both as to its organization and method of operation, may be best understood by reference to the following description taken in conjunction with the accompanying drawings in which:

Fig. 1 is a plan view of the timing mechanisms with the cover removed.

Fig. 2 is a side elevation view of the mechanism shown in Fig. 1, with portions shown in section.

Fig. 3 is a sectional view taken along

line

3..3 of Fig. l, and

Fig. 4 is a side elevation view of the selector locking assembly in relation to the framework and selector support.

Referring now to the drawings, We have shown there.- in a timing mechanism or controller embodying the in vention in one form thereof for use with a domestic clothes washing machine. The mechanism is mounted upon a framework having a bottom portion 1 and

upstanding end plates

2 and 3, the entire mechanism being compactly arranged and suitable for mounting upon the washing machine at a convenient accessible location, as on the backsplash panel. At one end a suitable pedestal 4 rigidly atfixed to end plate 2 and spaced therefrom supports a

timing motor

5, as for example, a low speed synchronous clock motor adapted to run in only one direction. This motor drives a gear train indicated generally at 6 and terminating in a main shaft driving gear 7 mounted in a bushing 8 loosely surrounding mainshaft 9 and rotatably mounted in end wall 2.

The main shaft is rotatably mounted in bushing 8 and in a second bushing 10 in

end wall

3 and at one end terminates in a collar 11 and at the other end in a

reset dial

12 keyed to the shaft by a

pin

13. Interposed between collar 11 and drive gear 7 is a suitable clutch such as a spring clutch 14 permitting shaft 9 to be rotated freely in a first direction by

dial

12, but engaging collar 11 and gear 7 as torsion is applied to the spring by rotation of gear 7 and thus driving shaft 9 in a second direction while

motor

5 is energized. As shaft 9 rotates in its clutch-engaged relation, the

dial

12 in turn is slowly rotated during the complete sequence of operation of the washing machine, one complete revolut-ion of the shaft 9 being accomplished for example in about 36 minutes and'corresponding to a complete washing cycle. When it is desired to provide more time for any particular stage of a sequence of operation and represented by non-driving engagement of the interrupted and full gears, later to be described, the operator may, by turning

dial

12 in the first direction, thus reset shaft 9'and'cause the complete cycle to be extended in time.

'Upstanding from bottom portion 1 of the framework at one side thereof is a

bracket

15, and rigidly mounted in this bracket and in

end wall

3 is a

rod

16 serving as a pivot for a rocking

U-shaped selector support

17 having a linear

upper edge

18 located on an opposite side of shaft 9 from the

pivot rod

16. As best shown in Fig. 3, the selector support has recessed portions on each side to accommodate shaft 9, one such recess having an

irregular cam surface

20 adapted to match a corresponding recessed surface on

cam

21 which is rigidly attached to shaft 9 at a location for lifting engagement with

selector support

17. As Will later appear, when shaft 9 is positioned with these cam surfaces in engagemer t, the U-shaped selector support occupies the reset position for the timing mechanism and the selector support rests in the solid line position of Fig. 3 and the selector may be readily moved to th next selected sequence of operations.

Rigidly mounted upon shaft 9 within the confines of the U-shaped selector support is a plurality of intermit 3 tently

toothed gears

22, 23, 24 and spaced longitudinally of the shaft and herein called interrupted gears. These gears serve as a means for advancing a cam shaft carrying order cams, later to be described, and which determine the order in which the machine operations are conducted. Each interrupted gear accordingly has its teeth arranged differently and corresponds to a particular sequence of operations among which a selection may be manually made by the operator of the washing machine. It will be understood that each gear represents a sequence of operations which is most suitable for the washing of one particular type of Wash load, as, for example, one particular type of fabric. At one plane parallel to the axis of main shaft 9 each of

gears

22, 23, 24 and 25 is devoid of teeth along a common line of their peripheral surfaces, which line represents a position at which a selector member may be freely moved across the peripheries of these gears and longitudinally of shaft 9. This position is suitably indicated on the surface of

reset dial

12 and serves as a reference point for the operator.

Positioned in a plane above shaft 9 parallel thereto and suitably journalled for rotation in

walls

2 and 3 of the framework is a

cam shaft

26 carrying a plurality of order cams here shown as six and as indicated at 27, 28, 29, 30, 31 and 32. A U-shaped

bracket

33, mounted on end wall 2 and upon bottom portion 1 of the framework, and having an

insulating cross bar

34 through Which insulating plungers (not shown) project into the path of the cams, supports a plurality of switches connected in the conventional manner to control the electric circuits of the washing machine. As the cam shaft is rotated, the cams actuate the switches in the usual appropriate manner. These switches may have their connecting leads to the electric circuits embedded in insulating blocks, shown at 35, 36, 37 and 38 with suitable conductor bars projecting therefrom, all to form a compact assembly. Slidably mounted upon

cam shaft

26 for longitudinal movement therealong is a

hollow tube

40 having an aperture therein defined by

spaced walls

41 and 42 and between which is a

full gear

43 keyed to the cam shaft, but slidable with the hollow tube. It will be readily seen that through this

arrangement gear

43 is movable relative to

gears

22, 23, 24, and 25. Rigidly affixed to this tube and projecting laterally therefrom is a selector member having a

handle

44 projecting over the top edge of the

selector support

17 and a

locking arm

45 having a

notch

46 in an extreme end thereof projecting over the

fixed rod

16. The length and weight of

handle

44 preferably is such as to retain the handle normally in contact with the

linear edge

18 of the U-shaped

selector support

17, as seen in Fig. 3.

Outboard of

end wall

3, the

cam shaft

26 is provided with a

gear

47 meshing with

gear

48 attached to the

inner disc

49 rotatably journalled upon the end of main shaft 9 and freely rotatable within the

reset dial

12. Preferably, the reset dial is formed of a transparent material and the

disc

49 bears indicia on its periphery related to the extent of rotation of

cam shaft

26 from a starting point, and hence the stages of operation accomplished by the washing machine at a given time.

Inboard of end wall 2, a spring actuated detent 50 engageable with registering slots in a

hub

51 projecting from

cam

27 serves to prevent improper adjustment of the cam shaft through backsplash in

gears

47, 48.

Beneath the floor portion 1 of the framework adjacent the U-shaped

selector support

17, we provide a

microswitch

52 which conveniently may serve as the conventional master switch for the washing machine circuits, such switch, when operated, in one direction, establishing the beginning of a sequence of operations and when operated in a second direction terminating the sequence of operations. In addition, we provide two

separate microswitches

53 and 54 beneath the floor portion and forming part of the conventional washing machine circuits which determine the speed at which the agitator and spin basket are driven, and the temperature of the water used. As an example, the

switch

53 when inoperative may be included in a circuit permitting normal speed of the agitator and spin basket, as in a sequence during the washing of an average wash, but, when operated, may be included in a side circuit permitting a slow speed of the agitator and spin basket, as in a sequence during the washing of delicate lingerie. Likewise, the

switch

54 when inoperative, may be included in a side circuit permitting water at a modified temperature to be used, but when operated may be included in a circuit permitting Water at normal temperature to be used.

A master

switch locking plate

55 is journalled for rocking movement at its ends upon

rod

16 and normally rests in a position out of contact with

selector locking arm

45. At its extreme upper edge, the locking plate has an inwardly extending

shoulder

56 having a length at least equal to the displacement of

gear

43 along

cam shaft

26 and adapted for engagement with the

notch

46 in the selector locking arm. At its lower edge, the locking plate has an

extension

57 projecting into operative position with respect to the contacts of

master switch

52 and adapted to actuate that switch when the plate is rocked into locking position by engagement of the selector locking arm therewith.

Also mounted for rocking movement upon

rod

16 is a U-shaped guide plate 60 having a plurality of

slots

61, 62, 63 and 64 for reception of

locking arm

45 and corresponding to the spacing of the several interrupted gears. Each slot has an inclined cut-away edge at its upper corners, as best seen in Fig. 4, serving to guide the locking arm and thus to center the

full gear

43 encompassed by the selector in a proper plane for engagement with the selected interrupted gear. At its lower edge, the guide plate has an

extension

65 projecting into operative position with respect to the contacts of

switch

54 and adapted to actuate that switch when the guide plate is rocked inwardly toward the main shaft by engagement of the locking arm with the bottom of

slots

62, 63, and 64. Slot 61, however, is of greater length and serves only to guide the locking arm and when the arm is in that slot it does not contact the bottom of the-slot and thus plate 60 is not rocked inwardly and switch 54 is not actuated. Such a condition corresponds, for example, to a sequence of operation represented by

gear

25 and in which the agitating and wash steps of the machine are to be at a slow speed and a modified water temperature is to be employed. By the same token,

slot

62 may represent a sequence of operations corresponding to gear 24 and in which the agitating and wash steps are to be at a slow speed and a normal water temperature is to be employed.

Slots

63 and 64 may represent two sequences of operations corresponding respectively to

gears

23 and 22 in which the agitating and wash steps may be at normal speeds but with different time cycles and with normal water temperature being employed in each cycle.

These different operating conditions, selected by our timing mechanism are made possible while retaining the compact nature of the mechanism and by employing an intermediate U-shaped plate 66 having a stepped upper edge 67-68, the

edge

67 lying beneath

slots

61, 62 and the

edge

68 lying beneath

slots

63, 64. Plate 66 likewise is rockably pivoted upon

rod

16 and its

upper edge

68 is engageable by locking

arm

45, whereas its

upper edge

67 is not engageable therewith. The position of plate 66 is such that as the

arm

45 engages therewith in its movement toward locking position upon

shoulder

56 of locking

plate

55, plate 66 rock's inwardly toward shaft 9 at the same time that guide plate 60 rocks inwardly through its contact with the

same locking arm

45. Intermediate plate 66 also carries an

extension

70 projecting into operative position with respect to the contacts of

switch

53 and adapted to actuate that switch as the inter mediate plate is rocked inwardly. Each of

plates

55, 66 and 6,0 are closely nested within

vthe selector support

17 as best seen in Fig. v4 and are biased into aposition away from the main shaft 9, .as by means .of resilient springs (not shown), so that their movement to switch actuating position is dependent upon the lowering of

selector lockmg arm

45.

With the foregoing description in mind, the operation of our improved timing mechanism is as follows: with the machine at rest, andin starting position, as indicated by

dial

12 and

disc

49,

the'cam

21 on main shaft 9 permits the

selector support

17 to be in its lowered position and the locking

arm

45 to be raised as seen in Fig. 3. At this time,'th"e"interrupted gears 22,23, 24 and 25 are so positionedthat along a common line there are no teeth present .to interfere with movement of

gear

43 lengthwise of

cam shaft

26. Depending upon the particular wash load to .be processed, theope'r'ator their moves handle 44 to a selected position and pivots the ,same about

shaft

26, engaging notch'

ffi'iri shoulder

56 of the locking iste. As this occurs,

plate

55 rocks inwardly, actuates

switch

52 and starts

timing motor

5. In case the locking arm is engaged in either of

slots

63 and 64 at this time, guide plate 60 and intermediate plate 66 are also actuated and switches 53 and 54 also are actuated. If the locking arm is in

slot

62, guides plate 60 and switch 54 are actuated, without actuation of plate 66 and

switch

53, but if in slot 61, neither the guide plate nor plate 66 are actuated and hence neither switch 53 not switch 54 are actuated.

As shaft 9 begins to turn,

selector support

17 is raised, locking

arm

44 against

linear edge

18 of that support and the cycle of operation of the machine then continues, through its entire selected sequence. As main shaft 9 rotates, the interrupted gear which is in mesh with

full gear

43 turns that full gear,

cam shaft

26, dial 49, and the array of

cams

27, 28, 29, 30, 31 and 32 simultaneously, and through actuation of the array of switches by those cams, thus operates the washing machine in its selected sequence of operations and with such modification as to wash and spin speeds and as to water temperature as dictated by

switches

53 and 54. At the completion of the cycle,

cam

21 on shaft again reaches, its starting position, at which

time selector support

17 drops. This permits

arm

45 to be moved out of the selected one of slots 61-64 and out of engagement with locking

plate

55. Thus, if the next sequence of operations is to be performed on a different type of wash load, the operator then shifts the selectorto a position corresponding to that diiferent type of load and proceeds as above described. Of course, if at any time during the cycle the operator should desire to stop all operations, it is only necessary to move

handle

44 down manually.

Support

17 is far enough below this handle so that

arm

45 can be moved out of engagement with

plate

55 which then opens

switch

52. The

arm

45 does not move out of the selected slot and thus proper operation is resumed by moving

handle

44 to cause

arm

45 to engage

plate

55 to again

trip switch

52.

In accordance with the patent statutes, we have described what at present is considered to be the preferred embodiment of our invention, but it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the true spirit and scope of the invention and we, therefore aim to cover in the appended claims, all such equivalent variations and modifications.

What we claim as new and desire to secure by Letters Patent of the United States is:

1. In a timing mechanism for conducting a selected one of a plurality of sequences of apparatus operations, the combination comprising a framework, a rotatable main shaft mounted on said framework, a timing motor for driving said main shaft, a plurality of interrupted gears of the same diameter positioned on said main shaft, each gear corresponding to a different sequence of operations, a cam shaft mounted .on said framework parallel to said main shaftand having ,cam means for controlling switches in the circuits of the apparatus to be operated, a full gear on said cam shaft axially movable relative to said interrupted gears, and means :for moving said full gear into selective engagement with any one of said interrupted gears.

2. In a timing mechanism for conducting a selected one of a plurality of sequences of apparatus operations, the combination comprising a framework, a rotatable main shaft mounted on said framework, a timing 'motor timing motor for driving said main shaft, a master switch ,for said motor, a plurality of interrupted gears ,of the same diameter positioned on said main shaft, each gear corresponding toa different sequence of .operations, a cam shaft-mounted upon said framework parallel to said main shaft and having cam means, an array of switches controlling circuits of .the apparatus to be operated and mounted upon said framework for actuation by said cam means, as said cam shaft rotates, a full gear keyed to said cam shaft and selectively shiftable therealong, selector means for positioning said full gear for engagement by a selected interrupted gear, a movable locking plate mounted upon said framework for engagement by said selector means thereby to hold said full gear in a selected position on said cam shaft, and a master switch actuating means connected to said locking plate for actuating said master switch as said plate moves to locking position.

3. In a timing mechanism for conducting a selected one of a plurality of sequences of apparatus operations, the combination comprising a framework, a rotatable main shaft mounted on said framework, a timing motor for driving said main shaft, a master switch for said motor, a plurality of interrupted gears of the same diameter positioned on said main shaft, each gear corresponding to a different sequence of operations, a cam shaft mounted upon said framework parallel to said main shaft and having cam means for controlling switches in the circuits of the apparatus to be operated, a full gear keyed to said cam shaft and selectively shiftable therealong, selector means for positioning said full gear for engagement by a selected interrupted gear, a selector means support pivotally mounted upon said framework and movable between a lower position and an upper position, a cam on said main shaft engaging said support and operable to move said support from said lower position to said upper position, a movable locking plate mounted upon said framework for engagement with said selector means, thereby to hold said full gear in a selected position on said cam shaft, and a master switch actuating means connected to said locking plate for actuating said master switch as said plate moves to locking position, said plate being held in locked position by its engagement with said selector means and by engagement of said selector means with said support while in its upper position.

4. In a timing mechanism for conducting a selected one of a plurality of sequences of apparatus operations, the combination comprising a framework, a rotatable main shaft mounted on said framework, a timing motor for driving said main shaft, a master switch for said motor, a plurality of interrupted gears on said main shaft, each gear corresponding to a different sequence of operations, a cam shaft mounted upon said framework and having cam means for controlling switches in the circuits of the apparatus to be operated, a full gear keyed to said cam shaft and selectively shiftable therealong, selector means for positioning said full gear for engagement by a selected interrupted gear, a movable guide plate engageable by said selector means for guiding said full gear into selected position, a switch actuating means connected to said guide plate for actuating a switch in a circuit of said apparatus upon locked engagement of said guide plate and selector means, a movable locking plate for engagement by said selector and a master switch actuating means connected to said locking plate for actuating said master switch as said locking plate moves to locking position, each of said plates being mounted upon said framework.

5. In a timing mechanism for conducting a selected one of a plurality of sequences of apparatus operations, the combination comprising a framework, a rotatable main shaft mounted on said framework, a gear train, a timing motor for driving said gear train, a clutch for engaging said main shaft and gear train, adial attached to said main shaft for resetting said main shaft with respect to said gear train, a plurality of interrupted gears on said main shaft, each gear corresponding to a different sequence of operations, a cam shaft mounted on said framework and having cam means for controlling switches in the circuitsof the apparatusto be operated, a full gear keyed to said cam shaft and selectively shiftable therealong, selector means for positioning said full gear for engagement by a selected interrupted gear, means for locking said selector means thereby to hold said full gear in a selected position on said cam shaft, a rotatable disc mounted adjacent said dial for indicating the stage of operation accomplished at a given time, and means attached to said cam shaft for driving engagement with said disc thereby to relate the position of said disc to the angular position of said cam shaft at said given time.

References Cited in the file of this patent UNITED STATES PATENTS 1,828,126 Brown Oct. 20, 1931 2,163,616 McGihon June 27, 1939 2,249,237 Fulton July 15, 1941 2,342,509 Gaty et al. Feb. 22, 1944 2,582,285 Schellens Jan. 15, 1952 2,608,082 Jones Aug. 26, 1952 2,786,905 Sibbald Mar. 26, 1957

US700360A 1957-12-03 1957-12-03 Timing mechanism for conducting a selected one of a plurality of sequences of operation Expired - Lifetime US2870278A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party

Publication number Priority date Publication date Assignee Title
US3023282A (en) * 1959-05-29 1962-02-27 Bristol Company Process controllers
US3157752A (en) * 1960-04-13 1964-11-17 Ripley Company Inc Actuator for an electric current consumption recorder

Citations (7)

* Cited by examiner, † Cited by third party

Publication number Priority date Publication date Assignee Title
US1828126A (en) * 1931-10-20 of akron
US2163616A (en) * 1939-06-27 Program indicator
US2249237A (en) * 1939-11-29 1941-07-15 Nat Time & Signal Corp Electric circuit controller
US2342509A (en) * 1941-05-24 1944-02-22 Fairchild Aviat Corp Camera
US2582285A (en) * 1948-05-07 1952-01-15 R W Cramer Company Inc Timer for causing brief actuations at prolonged intervals
US2608082A (en) * 1948-06-19 1952-08-26 Gen Electric Automatic washing machine control
US2786905A (en) * 1954-07-05 1957-03-26 Hoover Co Electrical switch

Patent Citations (7)

* Cited by examiner, † Cited by third party

Publication number Priority date Publication date Assignee Title
US1828126A (en) * 1931-10-20 of akron
US2163616A (en) * 1939-06-27 Program indicator
US2249237A (en) * 1939-11-29 1941-07-15 Nat Time & Signal Corp Electric circuit controller
US2342509A (en) * 1941-05-24 1944-02-22 Fairchild Aviat Corp Camera
US2582285A (en) * 1948-05-07 1952-01-15 R W Cramer Company Inc Timer for causing brief actuations at prolonged intervals
US2608082A (en) * 1948-06-19 1952-08-26 Gen Electric Automatic washing machine control
US2786905A (en) * 1954-07-05 1957-03-26 Hoover Co Electrical switch

Cited By (2)

* Cited by examiner, † Cited by third party

Publication number Priority date Publication date Assignee Title
US3023282A (en) * 1959-05-29 1962-02-27 Bristol Company Process controllers
US3157752A (en) * 1960-04-13 1964-11-17 Ripley Company Inc Actuator for an electric current consumption recorder

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