US3159255A

US3159255A - Timer shaft construction

Info

Publication number: US3159255A
Application number: US141137A
Authority: US
Inventors: Lee A Woolley
Original assignee: Kingston Products Corp
Current assignee: Kingston Products Corp
Priority date: 1961-09-27
Filing date: 1961-09-27
Publication date: 1964-12-01
Anticipated expiration: 1981-12-01

Description

1, 1954 L. A. WOOLLEY 3,159,255

TIMER SHAFT CONSTRUCTION Filed Sept. 2'7, 1961 2 Sheets-Sheet l 5 A. a g

United States Patent 3,159,255 TIMER SHAFT CGNSTRUCTION Lee A. Woolley, Kokozno, Ind., assignor to Kingston Products Corporation, Kohomo, Ind, a corporation of Indiana Filed Sept. 27, 1961, Ser. No. 141,137 12 Claims. (Cl. 192-67) This invention relates generally to sequential timers, and more specifically to an improved manual drive mechanism for the shaft thereof.

Although the principles of the present invention may be included in various devices, a particularly useful application is made of the same as an attachment for sequential timers of the type employed to operate and to regulate home laundry appliances. In particular, such timers employ a program cam or cam assembly which is rotated by a motor in one direction to close the proper combination of circuits at predetermined times, and to open the same. Such circuits control the washing, extracting, rinsing, drying, and the like of a washing machine. Frequently, the operator desires to alter the prescribed program, and therefore the timer typically includes a manual knob for advancing the main timing cam. Frequently, the various switches operated by the main timing cam are of such a type that reverse rotation of the timing cam would damage them. Accordingly, it is known in the art to include means as a part of the timer to prevent inadvertent reverse rotation of the main timing cam.

Thus when the main timing cam is manually advanced in the proper direction, if this be done with the circuits energizable, the washing machine components are caused to pass quickly through their various cycles, there being a resulting banging and clanking of relays, solenoids, and the like in response to such rapid manual advancement of the main timing cam.

The present invention contemplates the utilization of improvedstructure which eliminates such actuation of various controls in response to manual advancement of the timer. To this end, in accordance with the principles of this invention, a timer shaft construction is provided for usewith timers of the type which employ an axially shiftable timer shaft, the axial movement of which opens and closes a master switch in the timer. A preferred embodiment of the instant invention may be utilized either with a timer of the type where the shaft is pushed into the timer to open the master switch, or with a timer of the type where the timer shaft is pulled slightly outwardly from the timer to open the master switch, Moreover, a preferred embodiment of the manual drive mechanism for the timer switch is one which has a relatively short axial extent, thereby facilitating installation of the same in appliance control panels of relatively shallow depth, Still further, the instant invention is especially adapted to be constructed as an attachment whereby the same may be added to known or pro-existing timer mechanisms for which there is production tooling, without any modification of such tooling.

Accordingly, it is an object of the present invention to provide an improved manual drive mechanism for a sequence timer.

Another object of the present invention is to provide a manual .drive mechanism for a sequence timer shaft which is so constructed that the shaft may be rotated by hand only after the same has been manually positioned inthat ice provide a manual drive mechanism for a sequence timer shaft which is constructible in a rather short length so that the same may be employed with shallow control panels.

A still further object of the present invention is to provide a manual drive mechanism comprising a number of parts which may be employed selectively with either a timer whose shaft is pulled to stop the mechanism, or with a timer whose shaft is pushed to stop the mechanism controlled thereby.

Many other advantages, features and additional objects of the present invention will become manifest to'those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

On the drawings:

FIGURE 1 is a fragmentary enlarged cross-sectional view of a sequential timer equipped with a manual drive mechanism provided in accordance with the principles of the present invention;

FIGURE 2 is a cross-sectional view, taken along line II-II of FIGURE 1;

FIGURE 3 is a cross-sectional view, taken along line III-III of FIGURE 1;

FIGURE 4 is a perspective view of a detail part employed in the structure of FIGURE 1; and

FIGURE 5 is a view illustrating the structure of FIG- URE 1 assembled in an alternative manner.v

As shown on the drawings: I

The principles of this invention are particularly useful when embodied in a manual drive mechanism such as is illustrated in FIGURE 1, generally indicated by the numeral 10. The drive mechanism 10 forms an attachment for a sequential timer assembly or sequence timer generally indicated by the numeral 11. The sequence timer 11 includes a housing 12 having mounting bosses 13, and a rotatable timer shaft-14 which is rotatably mounted by the housing 12 in a manner which enables selective reciprocation thereof to either of two axial positions. The timer shaft 14 carries an annular disk 15 rigidly secured thereto which coacts with a switch actuator 16 slidably carried by the housing 12 for operating a switch generally indicated by the numeral 17. The switch 17 is a master switch and is illustrated as being of the single pole double throw type. It will be noted that when I switch which is opened by pushing the shaft 14 inwardly.

To hold the shaft 14 in a selected axial position, a detent mechanism generally indicated at 18 is provided. To this end, the shaft 14 has a pair of annular grooves 19, 20

within one of which is received a wire member 21 supported by one of the bosses 13, the wire member 21 being held in position between aface 22 on the housing 12 and a locking plate 23 by such locking plate 23 which is receivedin grooves in the bosses 13 as shown. Thus the timer shaft member 14 is supported in a manner wherein it can rotate, and wherein it is axially reciprocable to either of two axial positions. The other details of the timer arewell known in the art and need not be elaborated on herein.

The preferred embodiment of the manual drive mechanism iii of the instant invention includes a pair of

bracket members

24, 25, a tubular sleeve 26, an annular spring 27, and an extension shaft 28. There is provided s a rotational driving'connection generally indicated at 29 between the tubularvsleeve 26 and the timershaft 14.

There" is also. provided axial Coupling means generally.

indicated at 30 between the timer shaft and the extension shaft. Still further, there is provided a disengageable rotational driving connection generally indicated at 31 between the extension shaft 28 and the tubular sleeve 26.

The

bracket members

24, 2 5 are adapted to be secured to the timer in fixed relation thereto, and thus may be referred to or considered as stationary portions of the timer. In this embodiment, screws 32 pass through both of the brackets 24, into the bosses 13 to form a rigid connection therebetween. Each of the

brackets

24, 25 is provided with means which respectively defines an aperture 33 in the bracket member 24 and an aperture 34 in the bracket member 25; The apertures 33 and 34- are axially aligned with each other and the timer shaft 14 extends therethrough. It is to be noted that the means which defines the apertures 33 and 34- are axially spaced so as to define a space 35 between the

bracket members

24 and 25 at such apertures. The spring 27 is disposed within the space 35 as is also a flange 36 which is an external annular flange rigidly secured to the sleeve 26, being integral therewith in this embodiment. The bracket member 25 is provided with a face 37 which is adapted to serve as a mounting face and is provided with a number of threaded apertures into which screws 38 may pass for supporting the manual drive mechanism 10 and timer 11 on a mounting panel 39. The mounting panel 39 comprises a portion of the appliance with which the instant device is to be used.

The tubular sleeve 26 receives the end of the timer shaft 14 which projects from the housing. The rotational driving connection 29 insures that the sleeve 26 and the timer shaft 14 will be corotatable. In the instant embodiment, the timer shaft 14 is provided with a lug 4t} which is received within a slot 41 in the sleeve 26 in a manner which permits the sleeve 26 to slide with respect to the lug 49, and which enables the lug 4i) to slide with respect to the sleeve 26. It is preferable that there be only one such slot as the slot 41 so that the sleeve Z-may slidably engage with the end of the timer shaft M at only one relative angular rotational position or relationship. Where other slots may be provided, the slot 41 and the lug are both enlarged to insure, in a preferred embodiment, that there is only one such relative rotational position. In this embodiment, the sleeve 26 has a slabbed-off or flat surface 42 at one portion of its periphery, which periphery is adapted to Support an indicator dial 43. Thus the fiat surface 42 provides a periphery for the sleeve 26 which is of ncncircular configuration which insures corotation between the dial 43 and the, sleeve as, as well as insures that there is only one relative angular rotational position of assembly therebetween. By this structure, the dial 43 can only be assembled into a predetermined angular relationship with respect to the timer.

The annular spring 27, here illustrated as being of the wave washer type, extends about the timer shaft 14 as well as about a peripheral portion of the sleeve 26. As shown in FEGURE l, the annular spring 2'7 acts between the sleeve flange 36 and the bracket member 24 to bias the sleeve member 36 into yieldable engagement with the bracket member 25.

The extension shaft 28 has an end sliuably received within the sleeve 26, and an opposite end projecting therefrom to which a knob 44 is attached. The exten sion shaft 28 is rotatably supported by. the sleeve 26 in axial alignment with the timer shaft 14. Within the sleeve 26, the extension shaft 28 is provided with a peripheral'groove 45 defined by oppositely directed shoulders 46, 47, the groove 45 being spaced from the actual end of the extension shaft 28 by a reduced diameter portion 48. In this embodiment, the timer shaft 14- is provided with identical structure including a groove 49 and a reduced diameter portion 5i These peripheral grooves 45, 49 receive the axial coupling means 36 which is in the form of a clip illustrated in FIGURE 4. Two of these clips maybe employed, each extending for a distance peripherally about the reduced diameter portions 43, 5d of both shafts 2?, 14. The axial coupling clip 30 includes an inwardly radially projecting lip Sla at each axial end thereof which is received within the grooves 45, 59 for cooperation with the shoulders which define such grooves The axial coupling means 30 thus provides structure by which the extension shaft 23 and the timer shaft 14 are jointly reciprocable, and by which the extension shaft 28 and the timer shaft 14 are freely relatively rotatable.

The disengageable rotational driving connection between the extension shaft 28 and the tubular sleeve 26 comprises structure which in this embodiment includes engaging means projecting radially from the extension shaft 28, such engaging means having the form of a pair of lugs 51, Si. in this embodiment, the

lugs

51, 51 are so disposed and have such radial extent that they are at all times within the sleeve 26. To cooperate with the radially projecting lugs 51, the tubular sleeve 26 is provided with a series of angularly spaced internal slots 52 which slidably receive the lugs 51 and which have an extent substantially parailel to the axis of the sleeve 26. The drive mechanism in is so constructed that the engaging means or lugs 51 may be reciprocated in a direction parallel to the axis of the shaft to a position where the engaging means or lugs 51 are withdrawn from the slots 52. in this embodiment, and to that end, there is provided an internal annular recess 55 in the sleeve 26 at a point which is axially adjacent to the slots 52, which recess receives the radially projecting engaging means or lugs 5i and which enables the lugs 51 to rotate freely with respect to the sleeve 26 when axially aligned with such recess 5'3. Thus for one axial position of the shafts 28, 14, the rotational driving connection 31 effects a driving relationship between the extension shaft 28 and the sleeve 26, while in the other axial position of the shafts 28, 14, the rotationa-l'driving connection 31 is disengaged since the lugs 51 are retracted from the slots 52.

The structure as shown in FIGURE 1 has the shafts 28 and 14- in an outward position with the master switch 17 closed, thereby enabling the timer 11 to regulate such devices as it normally controls. If an attempt is made to change the timer setting by rotation of the knob 44, it is evident that the extension shaft and knob will rotate, but nothing else will happen. However, if the lugs 51 are first aligned with a pair of slots 52, and the knob 44 pushed inwardly, at the same time that the driving connection 31 is placed into an actual driving relationship, the master switch 17 will be opened. Thus when the mechanical connection is established between the knob 44 and the timer shaft 14, the timer 11 will of necessity be deenergized. After the timer 11 has then been manually set as maybe desired, the driving connection between the knob and the timer shaft 14 is disengaged at substantially the same time that the master switch 17 is reclosed.

In the event that the extension shaft 28 is rotated with respect to the sleeve 26 to a point where the lugs 51 are exactly out of line with respect to the slots 52, or are exactly in line with the means which defines the slots 52, and if thereafter the knob 44 and extension shaft 28 are pushed inwardly, the master switch 17 will open and the spring 27 will yield. It may be expected that the detent structure 18 will not be overpowered by the spring 27. However, if the knob 44 is then rotated, the lugs 51 will slide with respect to the sleeve 26 to a point where the lugs 51 are aligned with the slots 52, at which instant the spring 27 will move the sleeve 26 axially, thereby re-establishing the driving condition of the driving connection 31.

Referring now to FIGURE 5, it will be noted that the structure of FIGURE 1, has been reassembled with the spring 27 disposed on the opposite side of the flange 36 so that it acts between the flange 36 and the bracket member 25 to urge the flange member 36 against the bracket member 24. Under these conditions, the drive c2 mechanism is adapted to cooperate with a timer 11 which is provided with a master switch 17 that requires that the timer shaft 14 be pulled outwardly to open the timer master switch 17, herein illustrated by the contacts 17b and 17c. With this arrangement, the lugs 51 cooperate with that portion of the slots 52 which lies be tween the recess 53 and the outward end of the tubular sleeve 26.

From the foregoing, it is evident that the objects of this invention have been met, it being particularly evident that the disclosed manual drive mechanism is entirely external so that it may be employed with any timer having a reciprocable shaft, that it is of relatively short axial construction, and that the same set of components may be utilized both with timers that require the shaft to be pushed and with timers that require the shaft to be pulled to open the master switches thereof. Thus by mere choice as to which of two positions the spring 27 is to be disposed, the manual drive mechanism It) may be selectively employed with either type of timer.

Although various minor modifications might be suggested by those versed in the art, it should be understood that I wish to embody within the scope of the patent warranted hereon all such embodiments as reasonably and properly come within the scope of my contribution to the art.

I claim as my invention:

1. A manual drive mechanism for a sequence timer, comprising in combination:

(a) an axially reciprocable timer shaft supported by the timer for rotation about its axis;

(12) a tubular sleeve slidably receiving an end of the reciprocable timer shaft, which shaft terminates therein, said sleeve having means providing a slidable rotational driving connection therewith;

(c) an extension shaft having an end slidably received in and terminating within said sleeve in axial alignment with the timer shaft;

(d) coupling means disposed ,within said sleeve and connecting said extension shaft to the timer shaft in a manner providing joint axial movability and free relative rotation of said shaft; and

(e) engaging means on said extension shaft providing a rotational driving connection with said sleeve in one axial position of said shafts, and enabling free rotation of said extension shaft within said sleeve in another axial position of said shafts.

2. A manual drive mechanism for a sequence timer,

comprising in combination:

([2) a tubular sleeve slidably receiving an end of the reciprocable timer shaft, which shaft terminates therein, said sleeve having means providing a slidable rotational driving connection therewith;

(c) an extension shaft having an end slidably received in and terminating within said sleeve in axial alignmentwith the timer shaft;

(d) coupling means disposed within said sleeve and connecting said extension shaft to the timer shaft in a manner providing joint axial movability and free relative rotation of said shafts;

(e) engaging means on said extension shaft providing a rotational driving connection with said sleeve in one axial position of said shafts, and enabling free rotation of said extension shaft within said sleeve in another axial position of said shafts; and

(f) a spring biasing said sleeve in an axial direction and yieldable in response to movement of said shafts toward said one axial position when said engaging means is angularly misaligned from its driving position I 3. A manual drive mechanism for a sequence timer,

comprising in combination:

(b) a tubular sleeve slidably receiving an end of the reciprocable timer shaft, which shaft terminates therein, said sleeve having means providing aslidable rotational driving connection therewith, said sleeve having a radially outwardly projecting flange rigidly secured thereto;

(0) an extension shaft having an end slidably received in and terminating within said sleeve in axial alignment with the timer shaft;

(f) a spring acting between a first stationary portion of the timer and said flange and urging said flange in an axial direction into engagement with a second stationary portion of the timer, said spring being yieldable in response to movement of said shafts toward said one axial position when said engaging means is angularly misaligned from its driving position.

4. A manual drive mechanism for a sequence timer,

comprising in combination:

(12) a tubular sleeve slidably receiving an end of the reciprocable timer shaft, which shaft terminates therein, said sleeve having means providing a slidable rotational driving connection therewith, said sleeve having a radially outwardly projecting flange rigidly secured thereto;

(f) a spring selectively placeable during assembly on either side of said flange in engagement therewith and biasing said sleeve in a selected axial direction and yieldable in response to movement of said shafts toward said one axial position when said engaging means is angularly misaligned from its driving position.

5. A manual drive mechanism for a sequence timer,

comprising in combination:

(1;) a tubular sleeve slidably receiving an end of the reciprocable timer shaft, which shaft terminates therein, said sleeve having means providing a slidable rotational driving connection therewith;

(c) an extension shaft having an end slidably received 'in and terminating within said sleeve in axial alignment with the timer shaft;

(d) coupling means disposed within said sleeve" and connecting said extension shaft to the timer shaft in a manner providing joint axial movability and free relative rotation of said shafts;

(f) a dial directly supported on the outer periphery of said sleeve and indicating the timer setting.

6. A manual drive mechanism for a sequence timer,

comprising in combination:

(15) a tubular sleeve slidably receiving an end of the reciprocable timer shaft, which shaft terminates therein, said sleeve having means engageable with said timer shaft at only one rotational position of said sleeve relative to said timer shaft and providing a slidable rotational driving connection therewith;

(d) coupling means disposed within said sleeve and connecting said extension shaft to the timer shaft in a manner providing joint axial movability and free relative rotation of said shafts; and

7. A manual drive mechanism for a sequence timer,

comprising in combination:

(b) a tubular sleeve slidably receiving an end of the rec-iprocable timer shaft, which shaft terminates therein, said sleeve having means providing a slidable rotational driving connection therewith, said sleeve also having means integral therewith defining van internal slot having an extent in a direction parallel to the sleeve axis and an annular recess opening radially inwardly and disposed axially adjacent to said slot;

() an extension shaft having an end slidably received in and terminating within said sleeve in axial alignment with the timer shaft;

(e) engaging means integral with said extension shaft,

projecting radially outwardly therefrom, and received in said sleeve slot to provide a rotational driving connection between said extension shaft and said sleeve in one axial position of said shafts, and received in said annular recess in said sleeve to enable free rotation of said extension shaft with respect to said timer shaft in another axial position of said shafts.

8. A manual drive mechanism for a sequence timer,

comprising in combination:

(b) a tubular sleeve slidably receiving an end of the reciprocable timer shaft, which shaft terminates therein, said sleeve having means providing a slidable rotational driving connection therewith;

(1) an annular spring surroundingsaid timer shaft aridacting between a stationary portion of the timer andsaid sleeve, and urging said sleeve in an axial direction, and yieldable in response to movement of said shafts toward said one axial position when said engaging means is angularly misaligned from its driving position.

9. A manual drive mechanism for a sequence timer,

comprising in combination:

(a) an axially reciprocab-le timer shaft supported by the timer for rotation about its axis;

(b) a tubular sleeve slidably receiving an end of the reciprocable timer shaft, which shaft terminates therein, said sleeve having means providing a slidable rotational driving connection therewith, said sleeve having a radially outwardly projecting flange rigidly secured thereto;

(d) coupling means disposed within said sleeve and connecting said extension shaft to the timer shaft in a manner providing joint axial mova'oility and free relative rotation of said shafts;

(e) engaging means on said extension shaft providing a rotational driving connection with said sleeve in one axial position of said shafts, and enabling free rotation of said extension shaft within said sleeve in another axial position of said shafts;

(f) a pair of bracket members rigidly secured to the timer, and each having means defining an aperture which is axially aligned and spaced from the other aperture and through which apertures said timer shaft freely extends; and

(g) a spring, said spring and said sleeve flange being disposed between said spaced aperture'definingmeans, said spring acting between one of said bracket members and said flange and normally urging said flange in an axial direction into engagement with the other of said bracket members, said spring being yieldable in response to movement of said shafts toward said one axial position when said engaging means is angularly misaligned from its driving position.

10. A manual drive mechanism for a sequence timer,

comprising in combination:

(b) a tubular sleeve slidably receiving an end of the reciprocable timen shaft, which shaft terminates therein, said sleeve having means providing a slidable rotational driving connection therewith, said sleeve having a radially outwardly projecting flange rigidly secured thereto;

(of) coupling means disposed within said sleeve and connecting said extension shaft to the timer shaft in a manner providing joint axial movability and free relative rotation of said shafts;

(f) a pair of bracket members rigidly secured to the timer, and each having means defining an aperture which is axially aligned and spaced from the other aperture and through which apertures said timer shaft freely extends, one of said brackets having further means by which it and the timer can be supported; and

(g) a spring, said spring and said sleeve flange being disposed between said spaced aperture-defining- 7 means, said spring acting between one of said bracket members and said flange and normally urging said flange in an axial direction into engagement with the other of vsaid bracket members, said spring being (at) coupling means disposed within said sleeve and connecting said extension shaft to the timer shaft in a manner providing joint axial movability and free relative rotation of said shafts, said coupling means yieldable in response to movement of said shafts to being engaged by the interior of said sleeve and reward said one axial position when said engaging tained thereby in operative engagement with said means is angularly misaligned from its driving posishafts; tion. (e) engaging means integral with said extension shaft, 11. A manual drive mechanism for a sequence timer, projecting radially outwardly therefrom, and recomprising in combination: 10 ceived in said sleeve slot to provide a rotational driv- (a) an axially reciprocable timer shaft supported by ing connection between said extension shaft and said the timer for rotation about its axis; sleeve in one axial position of said shafts, and re- (12) a tubular sleeve slidably receiving an end of the ceived in said annular recess in said sleeve to enable reciprocable timer shaft, which shaft terminates free rotation of said extension shaft with respect therein, said sleeve having means providing a slidable 15 to said timer shaft in another. axial position of said rotational driving connection therewith; shafts; (c) an extension shaft having an end slidably received a dial directly supported on the outer periphery of in and terminating within said sleeve in axial alignsaid sleeve and indicating the timer setting; ment with the timer shaft; (g) a pair of bracket members rigidly secured to the ((1) coupling means disposed within said sleeve and timer, and each having means defining an aperture connecting said extension shaft to the timer shaft in which is axially aligned and spaced from the other "a manner providing joint axial movability and free aperture and through which apertures said timer relative rotation of said shafts, said coupling means shaft freely extends, one of said brackets having being engaged by the interior of said sleeve and refurther means by which it and the timer can be sup.- tained thereby in operative engagement with said ported; and shafts; and (h) an annular spring selectively placeable during as- (e) engaging means on said extension shaft providing sembly on either side of said flange in surrounding a rotational driving connection Wtih said sleeve in relation to said timer shaft, said spring and said one axial position of said shafts, and enabling free sleeve flange being disposed between said spaced rotation of said extension shaft within said sleeve in apertnre-defining-means, said spring acting between another axial position of said shafts. one of said bracket members and said flange and norl'l. A manual drive mechanism for a sequence timer, mally urgingsaid flange in a selected axial direction comprising in combination: into engage rent with the other of said bracket mem- (a) an axially reciprocable timer shaft supported by be-rs, said spring being yieldable in response to movethe timer for rotation about its axis; ment of said shafts toward said one axial position (b) a tubular sleeve slidably receiving an end of the when said engaging means is angularly misaligned seciprocable timer shaft, which shaft terminates from its driving position. therein, said sleeve having means engageable with i s i said timer shaft at only one rotational position of References Cited in the file of this Pattent said sleeve relative to said timer shaft and providing 40 UNlTED A S PATENTS a slidable rotational driving connection therewith, a v said sleeve having a radially outwardly projecting flange rigidly secured thereto, said sleeve also having i er 1941 means integral therewith defining an internal slot 2 5 l h 1952 having an extent in a direction parallel to the sleeve 684142 a d 5' 1954 axis and an annular recess opening radially inwardly 2971143 5 1333 g :5 i961 and disposed axially adjacent to said slot; I (c) an extension shaft having an end slidably received FOREIGN PATENTS in and terminating within said sleeve in axial align- 838,819 prance Sept, 20, 1943 ment with the timer shaft;

Claims

1. A MANUAL DRIVE MECHANISM FOR A SEQUENCE TIMER, COMPRISING IN COMBINATION: (A) AN AXIALLY RECIPROCABLE TIMER SHAFT SUPPORTED BY THE TIMER FOR ROTATION ABOUT ITS AXIS; (B) A TUBULAR SLEEVE SLIDABLY RECEIVING AN END OF THE RECIPROCABLE TIMER SHAFT, WHICH SHAFT TERMINATES THEREIN, SAID SLEEVE HAVING MEANS PROVIDING A SLIDABLE ROTATIONAL DRIVING CONNECTION THEREWITH; (C) AN EXTENSION SHAFT HAVING AN END SLIDABLY RECEIVED IN AND TERMINATING WITHIN SAID SLEEVE IN AXIAL ALIGNMENT WITH THE TIMER SHAFT; (D) COUPLING MEANS DISPOSED WITHIN SAID SLEEVE AND CONNECTING SAID EXTENSION SHAFT TO THE TIMER SHAFT IN A MANNER PROVIDING JOINT AXIAL MOVABILITY AND FREE RELATIVE ROTATION OF SAID SHAFT; AND