US2540724A

US2540724A - Interlocking control mechanism for a washing machine having an agitator and a pump

Info

Publication number: US2540724A
Application number: US619192A
Authority: US
Inventors: Geldhof Peter Eduard; Ringer Luther
Original assignee: Nineteen Hundred Corp
Current assignee: Whirlpool Corp
Priority date: 1945-09-28
Filing date: 1945-09-28
Publication date: 1951-02-06
Anticipated expiration: 1968-02-06

Description

\ means [for driving the Patented Feb. 6, 1951 V was INTERLOCKING' GDNTBOL MECHANISM PO A WASHING TORAND A PUMP mourns navmcanaen's- Peter sum St. llllcbll; Klein, ll'ignon to Nineteen Hundred New In annota eas, 019,19: I

l This invention relates to V and more particularlytc a control-mechanism w hinsor the like.

One of the principal-applicationsofthe present invention is to domesfle or hous'ehold ing machines: which are completely automatic in their operation of the washing, rinsing andvarious figures of the While it isnot for aifull understanding of the invention to illustrate the entire automatic washing control in f rinsing and dryingjmachine. an of the of thewashing x machine to. which the control mechanism is applied is illustrated in the machinareferenee may be had, if desired, to apdrying of clothing or other articles to be cleansed.

In machines of this general class'mean's is pro-. vided for pumping fluid'from one. location to'another, or for pumpi'ngfluid out of the machine.

One ofthe principal features'and objects of the present invention is to provide a'method-and pump for controlling-the, I

control mechanism which .is

economical to manufacture, rugged reli in use and substanti l y "free tro 'noisei and vibration. v

Another object of the present inventionis; to provide a novel'oontrol mechanism for washing machines or the like.

Another and further object o the present invention is to provide a novel method and means for connecting a motor in driving relation with a pump.

The novel features which we believe to be characteristic of our invention are set forth with particularity in the appended claims. Our invention itself, however, both as to its manner of construction and method of operation. together with further objects and advantages thereof, may best be understood by reference to the following description, taken in connection with the accompanying drawings, in which:

Figure 1 is a plan view of control mechanism embodying the novel principles and teachings of the present invention as attached to a. washing machine of the type described and claimed in our copending application entitled Automatic Washing, Rinsing and Drying Machine," U. S. Serial No. 491,618, filed June 21, 1943, now Patent No. 2,521,159 of September 5, 1950, and assigned to the same assignee as the present invention;

Figure '2 is a front elevational view of the control mechanism shown in Figure 1; and

Figure 3 is an enlarged fragmentary view of the lower portion of Figure 1 showing the control mechanism in its position where the pump is being driven by the driving belt of the motor.

Referring now to the various figures of the drawings there is illustrated therein one embodiment of the control mechanism for an automatic m of theapresent memo plica'nts" 'cop'ending application for Automatic Washing, and Rinsing Machine, U. S. Serial No. 491,618, filedJune 21,1943, and assigned to the same assignee'as the present inven- A -shown in the drawings herein, the main motor shaft ill of the washing machine-in arto drive througha belt II a plurality of driven members l2,- l3 and ll. Themotor shaft ll carries a drive-pulley l5 around which the belt fll extends. The driven member I'Iis mounted ..on a main shaft Ii of the gear 'case l1, while the driven member I4 is arranged to drive the basket of the automatic washing machine by a.

rim drive with the upper surface of the outer marginal portion of the driven member ll. As is common practice in many types of automatic washing machines, the agitator shaft It extends up through the driven member II but is not connected therewith. For the purposes of the present invention it is simply necessary to state that the agitator shaft I8 is arranged to be oscillated by mechanism contained within the gear case I! from the driven shaft [6 to which the driven member I! is rigidly secured.

As will be clearly observed from an inspection of Figure 1 of the drawings, the drive belt I I is in direct engagement with the drive'pulley l5 and the driven members l2 and I4 and for thatreason the driven members I! and I4 are rotating at all times that the motor shaft I0 is rotating. The driven member l3, however, is normally slightly out of direct engagement with the drive belt I I and under normal circumstances is therefore not being driven by the drive belt I I. This driven member II is mounted and secured to the pump shaft I! of the pump 20. The belt II is arranged to be selectively moved into driving engagement with the pump member I 3 by an idler II which also normally is disposed free and clear of the drive belt ll.

Before describing the mechanism for selectively moving the drive belt ll into and out of engagement with the pump member I3, reference is made to Figure 2, wherein the supporting structure for the mechanism is more fully illustrated. In many automatic washing machines, such, for

example, as the washing machine described and 3 claimed in our copending application Serial No. 491.618 above referred to, a floating base or spider is provided upon which substantially all of the operating mechanism of the washing machine is mounted. This floating base or spider is illustrated in Figure 2 by the reference character 22. A plurality of bosses 23 are formed on the under surface of the floating base 22 and from these bosses 23 a plurality of supporting arms or

studs

24, 25, 25, 21 and 25 extend.

Arms

24, 25 and 25 are dimensioned to extend down into suporting engagement with the gear case H to support the same.

Arms

25 and 21 support portions of the control mechanism presently to be described.

The "pump 20, which may be of any suitable type or kind, such, for example, as a vane type centrifugal pump, is mounted to the gear case II by supporting arms 29. This pump 25 is provided with an intake hose 30 and a discharge hose 3|.

The motor (not shown), is not supported from the gear case I! but is directly supported on the floating base or spider 22 by means of a bracket 32, the motor being secured by means of bolts 33 to the bracket 32, while the bracket 32 is secured to the floating base by means of bolts or securing pins 34 (see Fig. 1)

The selective control mechanism for forcing the drive belt into and out of engagement with the drive pulley l3 of the pump includes means for resiliently pressing the idler pulley 2| against the drive belt II to force the latter into driving engagement with the member l3. This means includes an idler arm 35 which is pivotally mounted'on a cylindrical portion 35 of the depending stud or arm 25. This idler arm 35 has a main body portion 31 which is U-shaped in transverse cross-section, as may be' seen from Figures 2 and 3, and includes a pair of fingers 33 to which the idler pulley is pivotally mounted by means of a pin 35. A second arm 40, of generally U-shaped transverse cross-sectional configuration, is also pivotally mounted on the cylindrical portion 35 of the same stud to which the arm is mounted. The open portion of the U of each of the arms 35 and I0 face each other and a helical compression spring 4| is mounted there: in over a bolt 42. This compression spring ll normally forces the tail portion 43 of the arm 35 away from the main body portion of the arm 55.

If extending finger 44 is held against movement, the spring 4| tends to rotate the arm 35 in a clockwise direction about the shaft 35. This forces the idler 2| against the belt thereby forcing the belt into driving engagement with the wheel |3 secured to the pump shaft l3. It will therefore be seen that in order to selectively move the idler 2| into and out of engagement with the belt II to force the latter into and out of driving engagement with the wheel I3, means must be provided for moving the extending finger portion 44 of the member 40.

In our aforesaid copending application Serial No. 491,618, power for operating various control mechanisms is obtained from an arm which is secured to the segment shaft of the gear box and driven from the main gear drive through a crank mechanism. The details of construction of the means by which this arm is operated are not necessary for an understanding of the present invention, it being sufficient to point out that the arm 45 is mounted on the segment shaft 45 of the gear box l1 and is oscillated back and forth preferably through an angle of approximately 60". The arm-l5 is provided with a pair of electric solenoids l1 and 53, whose plungers ll and 55 respectively are arranged to selectively engage the bars II and 52 respectively to move them lengthwise back and forth through a limited distance.

As may be seen best in Figure 2 of the drawings, the bar 52 has a notched out portion 53 near its end which extends through a slot 55 in an upstanding rod 55. The rod 55 is arranged to be raised as the bar 52 moves the left-hand inclined edge of the notch 53 into the slot 55, thereby camming the rod 55 upwardly to effect a control action.

The bar 52 is in this latter position when the solenoid 43 is deenergized, and in its position as shown in Figure 2 when energized. The upstanding rod 55 may, for example, connect the drive mechanism to rotate the clothes basket of the washing machine when in its lower position, and to disengage it when in its upper position.

It has been found very desirable in an automatic washing machine to interrelate the operation of the pump and the agitator in such a manner that the pump is connected whenever the main motor is energized except during the time when the agitator of the washing machine is in operation. It has been found that this may be accomplished by connecting the pump control mechanism with the agitator control mechanism in such a manner that the single operation of connecting the agitator disconnects the pump,

and the single operation of disconnecting the agitator connects the pump.

The bar 5| is arranged to be moved back and forth by the oscillating arm 45. When the solenoid 4'1 is deenergized the bar 5| is in its rear position as shown in Figures 1 and 2 of the drawings. ,When the solenoid 41 is energized, the bar 5| is in its position as shown in Figure 3 of the drawings. As may be seenin Figure 2, the forward end of the bar 5| is notched out as at 55 to provide a cam surface 51 which extends through a slot in the control rod 58 of the agitator mechanism. Thus the rod 58 is arranged to be raised when the bar 5| moves to its forward position and in this position it will be understood that the agitator shaft I8 is disconnected from a driving engagement with the main drive I5 01 ,the gear box.

When the rod 58 is in its position as shown in Figure 2 it is to be understood that the agitator shaft I5 is connected and is oscillated back and forth through suitable gear crank and segment drives from the main gear box drive l5. Gear box drives of this type are so common in the art that the details of such a drive from the main gear box drive ii to the agitator shaft I8 is not described herein.

The selective control mechanism for connecting and disconnecting the pump 25 is also connected to the bar 5|. More particularly, a link 53 is connected to the end of the bar 5| and held in place by means of a cotter pin 50. The other end of the link 59 is pivotally-connected to the finger 5| of a member 52. The member 52 is pivotally mounted on a cylindrical end portion 53 of the stud 21. The member 52 is of generally ushaped transverse cross-section, and in addition to the finger 5| includes a second finger portion 52', which lies in a higher plane than the plane in which the finger 5| lies. The finger 52' is pivotally connected as at M to another link member 55. The other end of the link member 55 is pivotally connected as at 66 to the extending arm or finger 44 of the member Ill.

As the bar 5| moves from its rear position as shown in Figures 1 and 2, to its forward position as shown in Figure 3, the link arm 59 forces the member 62 in a counter-clockwise direction about its pivot 63. Since there is no relative movement between the finger portions 6| and 62, the counter-clockwise movement of the finger portions GI and 62' forces the member 40 to move in a clockwise direction about its pivot point 3'5 through the link connection 65. The link connection 65 is of course, necessary due to the fact that the members 62 and 4|! move about different centers.

The clockwise movement of the member 4'0 about the pivot point 35 moves the member 35 in a clockwise direction about the same pivot point 36 through the spring connection 4|. The clockwise ovement of the member 35 about the pivot oint 3'5 forces the idler 2| against the drive belt I|, thus forcing the drive belt into driving connection with the wheel i3 secured to the impeller shaft IQ of the pump 20. It will thus be understood that when the bar 5| is in its forward position the pump is being driven by the drive belt II, and the agitator is disconnected due to the fact that the rod 58 is in its upper position. Conversely, when the bar 5| is in its rear position, as shown in Figures 1 and 2 of the drawings, the link 55 is in its retracted position and the member 35 has withdrawn the idler from engagement with the drive belt l|, thus disengaging the pump. Also in this position the agitator is engaged due to the fact that the rod 58 is in its lower position, as explained above.

From the above dscription it will be apparent that an extremely satisfactory and simple control mechanism has been provided for an automatic washing machine, and particularly a simple control mechanism for the pump. It will further be observed that by tying in the pump control with the agitator control through direct mechanical means, the operation of the pump is assured at all times that the motor is on and the agitator disconnected. It is furthermore assured that the pump itself is disconnected when the agitator is in operation.

While we have shown a particular embodiment of our invention it will, of course, be understood that we do not wish to be limited thereto, since many modifications may be made and we, therefore, contemplate by the appended claims to cover all such modifications as fall within th true spirit and scope oi our-invention.

We claim as our invention:

1. Control mechanism for a washing machine of the type having at least a movable agitator and a pump, comprising power means for moving the agitator, a first shiftable control element for connecting and disconnecting the agitator with said power means, means for rotating the pump including a second control element shiftable to produce a driving connection for said pump, and means interconnecting said first and second control elements to shift said control ele-- ments concurrently.

2. Control mechanism for a washing machine of the type having at least a movable agitator and a pump and motive power means for driving said agitator and pump, comprising a clutch controlling the connection of said agitator to said motive power means, a shiftable control link for said clutch, means for driving said pump from said motive power means including a shiftable element controlling the establishm nt of the driving connection, and a mechanical connection between said control link and said shiftable element to concurrently produce a driving connection of said agitator and disconnection of said pump, or vice versa.

3. Control mechanism for a washing machine of the type having at least a movable agitator and pump and motive pow r means for driving said agitator and pump, comprising a clutch controlling the connection of said agitator to said motive power means, a shiftable control "nk controlling operation of said clutch, means h. driving said pump from said motive power means including a shiftable element controlling the establishment of a driving connection, and a single rectilinearly movable member having operative conne-tion with said control link and said shiftable element to concurrently produce a driving connection of said agitator and disconnection of said pump, or vice versa.

4. Control mechanism for a washing machine of the type having at least a movable agitator and pump and motive power means for driving said agitator and pump, comprising a clutch controlling the connection of said agitator to said motive power means, a shiftable control link controlling operation of said clutch, means for driving said pump from said motive power means including a shiftable element controlling the establishment of a driving connection, a single rectilinearly movable member having operative connection with said control link and said shiftable element to concurrently produce a driving connection of said agitator and disconnection of said pump, or vice versa, including a power driven rocking member and a selectively operable connection between said rocking member and rectilinearly movable member operable to selectively connect said rectilinearly movable member with said rocking member, for movement therewith for the length of stroke thereof.

PETER EDUARD GELDHOF. LUTHER RlZNGER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS