US3148452A

US3148452A - Motion conversion device

Info

Publication number: US3148452A
Application number: US191183A
Authority: US
Inventors: Rabenau Manuel Von
Original assignee: WRITING TOYS CORP
Current assignee: WRITING TOYS CORP
Priority date: 1962-04-30
Filing date: 1962-04-30
Publication date: 1964-09-15
Anticipated expiration: 1981-09-15

Description

Sept. 15, 1964 M. VON RABENAU 3,143,452

MOTION CONVERSION DEVICE Filed April 30, 1962 a Sheets-Sheet 1 INVENTOR. MANUEL Vo/vAAsE/vAu Avg-waver:

Sept. 15, 1964 M. VON RABENAU 3,143,452

MOTION CONVERSION DEVICE Filed April 50, 1962 5 Sheets-Sheet 2 ITOR. MflNl/EL Va/vRABE/vw 14 T'TORNE KS Sept. 15, 1964 M. VON RABENAU 3,148,452

MOTION CONVERSION DEVICE Filed April so, 1962 :5 Sheets-Sheet s IN VEN TOR. Mmvua I a/VIMBENAU Arrow/vs):

United States Patent 3,148,452 MOTION CONVERSION DEVICE Manuel von Rabenau, St. Paul, Minn., assignor to Writing Toys Corporation, St. Paul, Minu a corporation of Minnesota Fiied Apr. 30, 1962, Ser. No. 191,183 8 Claims. (Cl. 33-18) This invention relates to a motion conversion device by which rotary motion is utilized to impart predetermined longitudinal and lateral or transverse movement to a carrier arm for the purpose of mechanically reproducing a predetermined word or phrase or design or other inscribed indicia. Among applications of such a device are the installation in the body of a doll or similar toy whereby rotory motion may be utilized to impart a predetermined longitudinal and transverse movement to a carrier arm to enable the doll or toy to simulate drawing or Writing.

The present invention constitutes an improvement over the invention described and claimed in my prior Patents No. 2,895,258 and No. 3,024,535.

The principal object of this invention is to provide a motion converter adapted to the use of interchangeable double track disc cams provided with a neutral groove or channel for each of the tracks and which upon rotation impart a predetermined longitudinal and transverse motion to a carrier arm guided by the cam followers in the tracks of said cams.

It is another object of this invention to provide a mechanical writing doll or similar toy having a motion conversion device installed in its body and adapted to the use of interchangeable double track disc cams which upon rotation impart predetermined longitudinal and transverse movement to a carrier arm guided by followers in the tracks of said cams and transmitted through one of the arms of the doll or similar toy to a hand holding a stylus with which a predetermined written message or drawn figure or design may be inscribed.

Other objects of the invention will become apparent as the description proceeds.

To the accomplishment of the foregoing and related ends, this invention then comprises the features hereinafter fully described and particularly pointed out in the claims, the following description setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways in which the principles of the invention may be employed.

' The invention is illustrated by the accompanying drawings in which the same numerals refer to corresponding parts and in which:

FIGURE 1 is a top plan View of the motion conversion device according to the present invention;

FIGURE 2 is a rear elevation, in section, of the device;

FIGURE 3 is a left side elevation, in section;

FIGURE 4 is a plan View of one form of double track disc cam having neutral grooves; and

FIGURE 5 is a representation of a doll showing schematically the manner in which the device according to the present invention may be incorporated into the body of a doll or similar toy to produce a mechanical writing toy.

Referring now to the drawings, and particularly to FIGURES 1, 2 and 3, there is shown a box-like frame or housing in the form of a rigid cylindrical tube, indicated generally at 10. The cylindrical housing is disposed so that its longitudinal axis normally extends generally vertically. It is provided with a bottom wall member 11 suitably attached thereto. A top plate, generally in the form of an open ring, indicated generally at 12, is dis- 3,148,452 Patented Sept. 15, 1964 posed at the top of the cylindrical housing and suitably attached thereto, as by means of screws or bolts.

The top plate 12 is disposed generally horizontally and includes two vertically extending spaced apart apertured

slide brackets

14 and 15 adapted to slidably support a right hand horizontal slide bar or rod 16. The top plate also includes a pair of vertically extending

slide brackets

17 and 18, each provided with an aperture and adapted to slidably support a left hand slide bar or rod 19. The

rods

16 and 19 are supported to as to be parallel, lying in a generally horizontal plane, and adapted to move together in straight line movement in that plane.

A vertically extending bracket 20 is secured to the right hand bar or rod 16 for movement therewith, and a corresponding vertically extending left hand bracket 21 is secured to the left hand sliding bar or rod 19 for movement therewith. Bracket 20 is disposed on rod 16 between

brackets

14 and 15 and bracket 21 is secured to rod 19 between

brackets

17 and 18. Brackets 2i) and 21 are connected by a pair of spaced parallel horizontal bars or

rods

22 and 23 so as to form with the sliding rods 16 and 19 a rigid transversely or laterally reciprocating unit. The unit reciprocates transversely or laterally relative to the word being written. For example, the transverse or lateral reciprocation forms the vertical elements of the Word being written.

Rods or

bars

22 and 23 lie in a generally horizontal plane spaced from but parallel to the plane in which rods or

bars

16 and 19 move. For convenience, rod 22 may be referred to as the front rod and rod 23 as the rear rod. The rigid transversely reciprocating unit composed of

rods

16 and 19,

brackets

20 and 21, and

rods

22 and 23 is referred to as the transverse or lateral motion carrier, and indicated generally by the numeral 24.

Slidably supported on the front and

rear rods

22 and 23 of the transverse motion carrier 24 is a longitudinal motion carrier, indicated gene ally at 25. The longitudinal motion carrier effects the generally longitudinal elements of the word being written. The longitudinal motion carrier 25 includes a carrier base 26, a right hand end member 27 secured to the base and a left hand end member 28 secured to the opposite end of the base. The

end members

27 and 28 are each provided with guide ways through which rods 22 and 23 extend so that the entire carrier 25 is slidably movable longitudinally along

rods

22 and 23 for movement relative to the transverse carrier 24 while movable transversely with the transverse carrier frame 24.

A relatively long curved rigid carrier arm 29 is pivotally mounted in the right and

left end members

27 and 28 of the longitudinal motion carrier for longitudinal movement therewith. Arm 29 is secured for movement with the carrier 25 by means of a pair of sleeves or collars 3t) and 31 held in place by means of pins 32 and 33, respectively. Thus, the arm 29 can pivot with respect to the carrier 25 and is moved longitudinally with it. Carrier arm 29 carries a stylus 34 at its outer extremity. In some instances, the skeletal arm 29 extends through the arm of a doll. In other instances, if desired, the arm of the doll may be molded from relatively rigid material, fitted with a stylus at its fingertips and secured to a foreshortened skeletal carrier arm in the vicinity of the shoulder of the doll by means not shown, but which are well within the skill of a doll maker.

Another arm 35 is secured to the housing 10 on the side opposite from the carrier arm 29. Arm 35 is desirably mounted for slight rotational movement. As shown, it is pivotally supported in a vertically upstanding bracket 36 and held against longitudinal movement by means of a pair of retaining

collars

37 and 38 held in place by means of pins 39 and 40, respectively. Rotational movements of arm 35 is limited by virtue of a rigid pin or crank arm 41 extending from arm 35 and engaging a notch formed in the rear edge of bracket 36 by virtue of an infolded tab 42.

Arm 35 carries a planar pad 43 at its outer extremity. The ends of

arms

35 and 29 are so interrelated that the pad 43 lies under stylus 34 so that during operation of the motion conversation device the stylus moves in contact with the surface of the pad. The pad 43 is desirably removably attached to the arm 35. Thus, the doll in which the unit is installed may also be used for ordinary play as any ordinary doll.

The arm locating means 41 and 42 are so associated that the arm 35 in its lowermost rotational position comes to stop at a position comparable to that which a person writing on a pad held in his hand would assume. The more freely rotating carrier arm 29 rests on the pad by force of gravity or, if desired, by spring tension not shown. The skeletal form of arm 35 shown may extend through the normal molded arm of the doll in which the converter is used or, if desired, the entire arm 35 may be molded rigid or semi-rigid material in the form of a dolls arm and attached to the housing at the shoulder for limited pivotal movement. Arm 35 need not be attached to the housing 10 but may simply be attached to the shoulder of the body of the doll or similar toy.

Movement is imparted to the

carrier

24 and 25 by means of a double track disc cam, indicated generally at 44. The double track disc cam 44 is supported on a to tatable turntable 45 supported within the upper portion of the housing immediately underlying the motion carriers. The turntable 4-5 is provided with a central spindle 46 to center the cam disc and a key in the form of a pin 47 to insure rotation of the cam disc with the turntable. A toothed aperture 48 in the cam (FIGURE 4) engages the spindle and key.

The turntable 45 is supported on a vertical shaft %9 having an outwardly extending flange 59 at its lower end. Shaft 49 in turn is supported on a hollow tubular drive shaft 51, being secured to rotate therewith. Tubular drive shaft 51 in turn fits telescopically over a driven vertical shaft 52 which is journaled in a bushing 53 in the top wall 54 of a gear housing, indicated generally at 55. As seen in FIGURE 2, tubular shaft 51 is provided with a longitudinal slot 56 and driven shaft 52 is provided with a pin 57 adjacent its upper end which fits and moves longitudinally in slot 56 and imparts rotation to the tubular shaft and to the turntable when the driven shaft is rotated.

Shaft 52 is driven by suitable power such as a spring motor or, as illustrated, a small electric motor 58 supported from the bottom surface of the bottom wall 59 of the gear housing 55. The drive shaft 69 of motor 58 is fitted with a spur gear 61.

The teeth of gear 61 mesh with the teeth of a larger spur gear 62 journaled for rotation in a bushing 63 in the bottom wall 59 of the gear housing on an axis aligned with the axis of the vertical turntable shaft. A smaller spur gear 64 is secured to gear 62 and rotates on the same axis with it and at the same rate. Gear 64 in turn meshes with larger gear 65 journaled in a bushing 66 in the bottom wall 59 of the gear housing for rotation on an axis parallel to the axis of the turntable shaft. Gear 65 in turn has a smaller gear 67 secured to it for rotation on the same axis and at the same speed. This smaller gear in turn meshes with a larger gear 68 journaled in the top of the gear 64 for rotation on the same axis as that gear, but independently and at a different rate.

A smaller gear 69 is attached to gear 68 for rotation with it on the same axis and at the same rate of speed. Gear 69 in turn meshes with a larger gear 70 journaled in the top of gear 67 and a bushing 71 in the top wall 54 of the gear housing 55. A smaller gear 72 is secured to gear 70 and rotates on the same axis and at the same rate as gear 70.

Gears

70 and 72 rotate on the same axis as gears 65 and 67, but independently thereof and at different rates of speed. Gear 72 in turn meshes with a larger 4 gear 73 secured to the bottom of the turntable shaft 52 within the gear housing.

The bottom of the turntable shaft 52 is journaled in bushing 53 and also in the top of gear 69.

Gears

73, 69, 68, 64 and 62 all rotate on the same axis but gears 62 and 64 rotate independently at a rate greater than

gears

68 and 69, which rotate at a rate greater than gear 73. Thus, the rate of rotation of the turntable shaft is reduced to such a rate that movement of the stylus on the pad in response to rotation of the disc cam simulates the writing rate of a child.

Where an electric motor is used as the driving force, it may be powered, for example, by a pair of

flashlight batteries

74 and 75 housed in

recesses

76 and 77, respectively, in the housing 10. In a manner which is well understood, the batteries are connected in series between contacts, one of which is connected directly to the motor through a suitable conductor wire and the other of which is connected to the motor through a suitable connector wire to a switch and another wire from the switch to the motor, in a conventional manner. The bottom wall 59 of the gear housing 55 is supported from the top wall by means of a plurality of legs or posts 78. The gear housing is supported from the bottom wall 11 of the housing 10.

As best shown in FIGURE 4, the face of the disc cam is provided with an outer endless eccentric operating cam track 79 which governs movement of the transverse motion carrier 24 by means of a cam follower 89 which is moved in response to the configuration of the outer cam track. The disc is also provided with an inner endless eccentric operating cam track 81 which controls movement of the longitudinal motion carrier 25 through the medium of a cam follower 82 which rests in the cam groove and is moved in response to rotation of the cam disc.

In addition, the face of the cam disc is provided with a circular outer neutral groove or channel or track 83 which is in direct communication with outer operating track 79 and a circular inner neutral groove or channel or track 84 which is in communication with the inner operating cam track 81. Neutral track 83 is exterior of and surrounds the outer operating cam track 79 and neutral track 84 is interior of and surrounded by the inner operating cam track 81. Both of these latter cam tracks are interior of the outer operating cam track 79.

The neutral tracks end at their points of intersection with the operating cam tracks and the beginnings of the neutral tracks are spaced as closely as possible to the points where the connecting tracks to the operating tracks depart from the circular path. As pointed out in greater detail hereinafter, the function of the neutral tracks is to insure that the word or description written on the pad by the stylus is begun at its beginning regardless of the relative location of the cam tracks and cam followers when cam discs are interchanged.

The outer periphery of disc cam 44 is also provided with one or more edge earns 85 whose function, as described in greater detail hereinafter, is to lift the stylus from the pad at the end of the word or on other occasions when it is customary to lift a writing stylus from a pad, such as between words, to dot an i or to cross a t, and the like.

Transverse movement is imparted to the

carriers

24 and 25 and carrier arm 29 by means of cam follower 80, as follows. Housing top plate 12 is provided with a bifurcated or slotted guide bracket 86 whose guide portion is horizontally disposed in a plane parallel to the planes of movement of the carriers. The slot in bracket 86 is disposed to extend in a transverse or lateral direction, that is, from front to back of the housing and the dolls body. Bracket 86 extends inwardly from the cylindrical wall of housing 10. Cam follower is supported in the slotted bracket, being restrained against vertical movement and held within the confines of the slot by means of suitable collars 87 secured to the cam follower and disposed on opposite faces of the slotted bracket.

A link member 88 extending from cam follower 80 to rear rod 23 of the transverse motion carrier 24 operatively connects the transverse motion carrier for movement in response to the cam follower moving in the track of the disc cam. A coil spring 89 is connected between link member 88 and a screw or pin 90 in the housing wall to urge the cam follower and the lateral motion carrier to a neutral position when the disc cam is removed for replacement. Since the lateral and longitudinal motion carriers move together it will be apparent that the same transverse motion imparted to carrier 24 will likewise be imparted to the longitudinal motion carrier 25, and through it to the stylus arm 29.

Longitudinal motion is imparted by the longitudinal motion carrier 25 and stylus arm 29 by means of cam follower 82, as follows. A further bifurcated or slotted guide bracket 91 is supported from top plate 12. The slotted guide portion of bracket 91 lies in the same plane as the slotted portion of bracket 86, spaced from but parallel to the planes of movement of the transverse and longitudinal motion carriers. The guide slot in bracket 91 is disposed at a right angle to the guide slot of bracket 86. Cam follower 82 is supported for movement in the slot of bracket 91 by means of a pair of collars 92 secured to the cam follower and disposed against opposite faces of the slotted bracket.

As best seen in FIGURE 2, the upper end of cam follower 82 is positioned in a transverse slot 93 at the bottom of the longitudinal motion carrier to permit relative movement in a lateral direction between the cam follower 82 and the longitudinal motion carrier. Slot 93 is defined by a portion of the bottom edge of the right hand end member 27 of the longitudinal motion carrier 25 and a bar 94 secured to the bottom surface of the base 26 of the longitudinal motion carrier, such as by means of screws 95.

At the same time, the position of the upper end of the cam follower 82 in the slot 93 forms a direct connection between the cam follower and the longitudinal motion carrier for longitudinal movement along the

bars

22 and 23 of the lateral motion carrier. A coil spring 96 is provided to urge cam follower 82 into its neutral position when the disc cam is removed from the turntable. One end of spring 96 is secured to the longitudinal motion carrier 25, as by means of screw 97, and the opposite end of the spring is attached to the bracket 36 extending upwardly from the top plate of the housing.

In order to facilitate removal and exchange of disc earns, the disc supporting turntable 45 is movably mounted on

telescoping shafts

51 and 52, as already described. In order to constantly urge the disc cam on the turntable up into operative contact with the cam followers, a coil spring 98 is provided around the vertical shafts. The lower end of coil spring 98 bears against a washer 99 supported by means of a collar 100 around drive shaft 52. Collar 100 is in turn held by means of a pin 101 extending through the shaft. The opposite end of coil spring 93 bears against the bottom surface of the flange 50 below the turntable shaft.

In order to facilitate lowering of the disc cam turntable to permit a change of cams there is provided a clevis member 102 whose arms extend around the turntable shaft and its surrounding coil spring and one end of which is pivotally mounted at 103 in a pivot bracket 104 secured to the inside front wall of the cylindrical housing 10. A pair of horizontally disposed

pins

105 and 106 is provided at the opposite outside edges of the clevis 102. A collar 107 is provided around the turntable shaft 49 in contact with the top surface of flange 50. A pair of

horizontal pins

108 and 109 is provided extending outwardly from the outside edges of collar 107. A pair of pivotally attached links 110 and 111 6 connects the clevis 102 with the collar 107 through the pins and 108, and 106 and 109, respectively. The free end of clevis 102 opposite to its pivotal mounting is provided with a handle member 112 which is desirably pivotally attached at 113.

Upon exertion of downward pressure on handle 112 the clevis 102 moves on its pivot 103. The downward motion of clevis 102 is transmitted through the pivotally mounted links and 111 to the collar 107 on the upper surface of the flange 50 of the turntable shaft 49 and moves the turntable downwardly against the pressure of coil spring 98. The tubular shaft 51 slides over the drive shaft 52 while pin 57 moves in slot 56. In this manner, the turntable may be lowered sufliciently to permit removal of one disc cam and replacement with another. As soon as the disc cam is lowered free from the

cam followers

80 and 82, the cam followers are returned to their neutral positions by virtue of coil springs 89 and 96, respectively.

An opening 114 of substantial size is provided in the back of housing 10 to permit interchange of disc cams. In order to further facilitate this exchange, a locking slot or notch 115 is desirably provided in the back wall of the housing 10 to receive the clevis handle 112 and hold the clevis and the turntable in their lowered position. Upon exchange of the cam the handle 112 is released from its retaining notch 115 and the turntable assembly is forced upwardly by spring pressure to bring the disc cams again into resilient operative contact with the

cam followers

80 and 82. Since the cam followers are in their neutral positions they will engage the neutral cam tracks of the cam. The handle 112 is then desirably turned on its pivot 113 out of the way into the housing so that it does not protrude out of the back of the doll or similar toy in which the mechanism may be installed.

The cam followers will engage the neutral cam tracks irrespective of the relative positions of the disc cam and other element of the device. Thus, when rotation of the turntable is begun, as by flow of current from the batteries to the electric motor, the cam followers will ride in their rsepective neutral tracks to the point where the neutral tracks merge with the operating tracks and then the scribing of the inscription by the stylus will begin at the actual beginning. Thus, in some instances, the scribing of the inscription may begin almost immediately after rotation of the turntable is begun. In other instances, almost a complete revolution of the turntable may occur before the cam followers are moved into the operating tracks to begin the scribing of the inscription. In FIG- URE 4, the

cam followers

80 and 82 are shown in position at the approximate beginning of the inscription about a 16th of a turn of the cam after the cam followers have left their respective neutral grooves. I I In order that the stylus may be lifted from the pad at the end of a word and similar situations, edge cam 85 at the periphery of the ,disc cam is provided. The position and the length of the edge cam or cams is coordinated with the operating tracks of the cam to provide spacing in the written inscription, as needed. In order to permit the edge cam to lift the stylus an arm or lever, indicated generally at 116, is provided. The lever 116 is pivotally mounted by means of a pin 117 in a bracket 118 on the upper surface of the base member 26 of the longitudinal motion carrier 25 intermediate of the end walls.

Lever 116 is of a length such that it extends out beyond the periphery of the disc cam'so that its bottom surface may engage the edge cam. Its inner end which is adjacent the pivot 117 is provided with a lifting member 119 positioned to engage a rigid elongated pin or arm 120 projecting out from the portion of carrier arm 29 which lies between the end walls of the longitudinal motion carrier. When the outer end of lever 116 is engaged by the edge cam, it is lifted on its pivot mounting and at the same time, lifts pin 119 to rotate the carrier arm and lift the stylus from the pad.

The disc cam 44 is desirably double faced, that is, provided with cam tracks on both of its surfaces. In this manner, the writing doll or other toy may be made to write a different word or inscribe a different inscription merely by lowering the turntable and turning the disc cam over.

The stylus 34 may be, for example, a pencil, a ball point pen or the like, and the pad 43 may be simply a pad of paper supported by a'suitable rigid backing. In the preferred embodiment of the invention, however, the stylus is simply a dull nonmarking point and the pad is a socalled Magic Slate. As is well known, such a tablet or pad comprises an opaque backing sheet having a waxy coating overlaid by a semi-opaque or translucent sheet. This last sheet is also desirably covered by a tough scratchresistant transparent film. As an inscription is formed by the pressure of the stylus against the top surface of the pad, the semi-opaque sheet is forced into intimate con tact with the waxy surface of the opaque backing. Because of the very slight tackiness of the waxy coating the semi-opaque sheet adheres to the opaque backing along the line where pressure was applied so that the opaque backing is visible through the semi-opaque sheet at these points. The whole inscription is erased by merely lifting the translucent sheet from the backing and breaking the temporary bond between it and the backing sheet.

Even though the stylus tip is desirably a fixed permanent part of the arm of the doll or toy, it is preferred to provide a removable extension of the stylus in the form of a simulated writing instrument. This may be a simulated pen or pencil or quill or the like, which is insertable into a socket or other opening formed in the hand of the doll. When it is desired to use the doll or toy in ordinary play, the simulated writing instrument is removed along with the pad.

In the operation of the device, rotary motion is imparted to the turntable from the motor means through the gear system and turntable shaft to rotate the disc cam on the turntable. Rotation of the cam causes lateral movement of the transverse motion carrier on its slide rods. This lateral motion is transmitted to the longitudinal motion carrier which is supported and carried by the transverse motion carrier. Then, either independently or simultaneously. depending upon the word or inscription being written, the rotation of the disc cam imparts longitudinal motion to the longitudinal motion carrier. These separate lateral and longitudinal movements are combined in the carrier arm so that the stylus is moved in a pattern incorporating both lateral and longitudinal motion to inscribe the predetermined word or other inscription dictated by the operating tracks of the disc cam. When the unit is installed in the body of a doll, as shown in FIGURE 5, or a similar toy and the arms of the device are either the arms of the doll, or extend through the arms of a doll or similar toy, the doll or toy simulates the writing of a human.

It is apparent that many modifications and variations of this invention as hereinbefore set forth may be made without departing from the spirit and scope thereof. The specific embodiments described are given by way of example only and the invention is limited only by the terms of the appended claims.

I claim:

1. In a device for converting rotary motion to transverse and longitudinal motion in a plane, said device comprising a supporting frame, a transverse motion carrier mounted for reciprocatory motion in said frame, a longitudinal motion carrier mounted on said transverse motion carrier for transverse motion with said carrier and longitudinal motion relative thereto, a double track disc cam, a cam follower disposed in association with each of said cam tracks, a slotted guide member for each of said cam followers, said slotted guide members being secured to said frame and spaced from the face of said disc cam, the slots in said guide members being disposed at right angles with respect to each other, means connecting one of said cam followers to said transverse motion carrier to impart transverse motion to said carrier, means connecting the other of said cam followers to said longitudinal motion carrier to impart longitudinal motion thereto, and means for rotating said cam, the improvement which resides in the provision of resiliently mounted support means for said cam to urge said cam into resilient contact with said cam followers, comprising a turntable, a telescoping drive shaft for the turntable, means to cause the telescoping elements of said drive shaft to rotate together and resilient spring means positioned to normally urge the telescoping elements of said drive shaft apart, means for moving said resilient support means against resilient pressure to move said cam away from said cam followers and out of contact therewith, resilient means to move said cam followers in their respective slotted guide members to a neutral position upon movement of said cam out of contact with said cam followers, and aperture means in said frame permitting insertion and removal of disc cams.

2. A device according to claim 1 further characterized in that means are provided to lock said resilient supporting means in position holding said disc cam out of contact with said cam followers to permit removal and exchange of disc cams.

3. A device according to claim 1 further characterized in that a rigid carrier arm having a stylus at its outer extremity is mounted for movement with said longitudinal motion carrier and a second rigid arm is mounted for cooperation with said carrier arm, said second arm having a fiat pad at its outer extremity held in the plane of movement of said stylus, whereby the stylus may be moved over the surface of said pad in simulation of writing.

4. A device according to claim 3 further characterized in that said rigid arms are supported for limiting rotational movement relative to said longitudinal motion carrier and said supporting frame.

5. A device according to claim 1 further characterized in that said cam disc is provided with a pair of nonintersecting endless eccentric operating cam tracks disposed about the center of said disc, one of said tracks governing longitudinal movement of the longitudinal motion carrier and the other of said tracks governing simultaneous transverse movement of the transverse motion carrier and longitudinal motion carrier, and a pair of circular neutral cam tracks disposed about the center of the disc, each of said neutral cam tracks being spaced from and in communication with one of said eccentric cam tracks.

6. A device according to claim 5 further characterized by the provision of eccentric edge cam means on said cam disc, a lifter arm associated with said carrier arm, said lifter arm extending to the periphery of said cam disc and being operative to lift said carrier arm and stylus for limited rotational movement away from the surface of said cam upon engagement with said edge cam means.

7. A device according to claim 4 further characterized in that the device is housed in the hollow body of a doll, said first carrier arm being coextensive with one of the arms of said doll and said stylus being supported by the hand of that arm, the second of said arms being coextensive with the other arm of said doll and said flat pad being supported by the hand of that arm.

8. A device according to claim 7 further characterized in that means simulating a writing instrument are removably attached to the hand of the arm of the doll supporting said stylus and said rigid fiat pad is removably attached to the hand of said other arm.

No references cited.

Claims

1. IN A DEVICE FOR CONVERTING ROTARY MOTION TO TRANSVERSE AND LONGITUDINAL MOTION IN A PLANE, SAID DEVICE COMPRISING A SUPPORTING FRAME, A TRANSVERSE MOTION CARRIER MOUNTED FOR RECIPROCATORY MOTION IN SAID FRAME, A LONGITUDINAL MOTION CARRIER MOUNTED ON SAID TRANSVERSE MOTION CARRIER FOR TRANSVERSE MOTION WITH SAID CARRIER AND LONGITUDINAL MOTION RELATIVE THERETO, A DOUBLE TRACK DISC CAM, A CAM FOLLOWER DISPOSED IN ASSOCIATION WITH EACH OF SAID CAM TRACKS, A SLOTTED GUIDE MEMBER FOR EACH OF SAID CAM FOLLOWERS, SAID SLOTTED GUIDE MEMBERS BEING SECURED TO SAID FRAME AND SPACED FROM THE FACE OF SAID DISC CAM, THE SLOTS IN SAID GUIDE MEMBERS BEING DISPOSED AT RIGHT ANGLES WITH RESPECT TO EACH OTHER, MEANS CONNECTING ONE OF SAID CAM FOLLOWERS TO SAID TRANSVERSE MOTION CARRIER TO IMPART TRANSVERSE MOTION TO SAID CARRIER, MEANS CONNECTING THE OTHER OF SAID CAM FOLLOWERS TO SAID LONGITUDINAL MOTION CARRIER TO IMPART LONGITUDINAL MOTION THERETO, AND MEANS FOR ROTATING SAID CAM, THE IMPROVEMENT WHICH RESIDES IN THE PROVISION OF RESILIENTLY MOUNTED SUPPORT MEANS FOR SAID CAM TO URGE SAID CAM INTO RESILIENT CONTACT WITH SAID CAM FOLLOWERS, COMPRISING A TURNTABLE, A TELESCOPING DRIVE SHAFT FOR THE TURNTABLE, MEANS TO CAUSE THE TELESCOPING ELEMENTS OF SAID DRIVE SHAFT TO ROTATE TOGETHER AND RESILIENT SPRING MEANS POSITIONED TO NORMALLY URGE THE TELE-