referring first to fig1 and 2 , the toy according to this invention illustrated therein roughly resembles a mouse and comprises a hollow body 1 of suitable soft plastic material such as expanded or cellular polyethylene mounted on a rigid , u - shaped frame 2 for example of metal wire . a spool 3 is mounted for free rotation between the lateral walls of the body 1 and projects slightly from beneath the open bottom of this body 1 . the spool 3 comprises a longitudinal central bore 4 through which an elastic element 5 is passed and acts both as a shaft and as a return member for the spool 3 . at its midpoint this elastic element 5 is secured through any suitable means , such as a cross pin or nail 6 , to the spool 3 and has its opposite ends anchored to corresponding loops 7 and 8 formed at the lower ends of said frame 2 . a string 9 attached at one end to the spool 3 is wound around the latter and its opposite end , provided with a finger grip in the form of a stop member 10 , extends through a hole 11 formed at the top of the body 1 and can thus be pulled from the outside of said body 1 . the spool 3 is provided with a pair of integral end flanges 12 , 13 of which the peripheries are located at irregular distances from the axis of rotation of the spool 3 . in the form of embodiment illustrated , the peripheries of the flanges 12 , 13 have an elliptical configuration , the major axes of the two ellipses being shifted from each other by 90 ° so that when the spool bears on a substantially flat surface the rotation of the spool on this surface propels the toy with a staggering motion . to operate the toy , the user simply pulls the string 9 away from the body 1 , thus causing the string to unwind from and rotate the spool 3 , so that the elastic element 5 is twisted and caused to store energy . if , after laying to the toy on the floor , the user releases the traction exerted on the string 9 , the spool 3 will be rotatably driven in the opposite direction by the elastic force stored in the elastic element 5 . as explained hereinabove , the forward motion of the toy is then a staggering one , since the toy bears on the floor through points consisting on the one hand of the peripheries of the two spool flanges and on the other hand of the body proper tending to cant now on one side , now on the other side . of course , other means may be provided for producing this staggering motion . thus , for example and as shown in fig3 and 4 , the spool 15 may have its end flanges made of circular &# 34 ; wheels &# 34 ; having their axes disposed eccentrically in relation to the spool axis . it is also possible to provide only one eccentric wheel ( with respect to the spool axis ), the other wheel being concentric thereto . another possibility consists in providing flanges having any polygonal convex configuration , or curvilinear polygonal configuration , the only requirement being that the outer peripheries of the two flanges must not be symmetrical to each other . as in the example illustrated in fig5 and 6 , the flanges 18 , 19 consist of hexagonal elements so mounted on the spool 20 that the each vertex 21 of one flange 18 lies between two adjacent vertices 22 of the other flange 19 , so that the points through which the toy bears on the floor are , in addition to the bottom of the body proper , one vertex 21 ( or 22 ) of one of the flanges 18 ( or 19 ) and a flat face 23 ( or 24 ) of the other flange 19 ( or 18 ). in fig7 there is shown a modification of the invention in which the toy comprises a u - shaped wire frame 31 on which a hollow soft plastic body 32 of inverted u - shaped transverse cross section is mounted . the body 32 is formed from a cellular plastic material which is preferably about one centimeter thick and is soft and pliable but has sufficient body to retain its shape . the body 32 has a skirt portion which extends down below the lower end of the frame 31 and terminates in a lower edge 32a at least portions of which are engageable with the floor . the center of gravity of the body is such that a forward portion normally engages the floor as illustrated in fig2 . the body is suitably secured to the flame , for example by tie threads 33 which extend through the body and around the frame . the tie threads 33 are located above the lower ends of the frame 31 so as to leave lower ends free . a spool 34 is rotatably supported between lower ends of the frame by means of a rubber band 35 which extends between free lower end portions of the frame . at its lower ends the wire forming the frame 31 is bent inwardly as indicated at 31a and the end portion is then bent to form an approximately circular eye or loop 31b . opposite ends of the rubber band 35 extend through the eyes 31b and around lower end portions of the frame so as to be securely anchored . at its central point the rubber band 35 is secured to the spool 34 by a pin 36 which extends into the spool and across the axial bore 34a so as to capture the rubber band at its midpoint . the pin 36 is preferably removable so as to permit replacement of the rubber band 35 in the event that it breaks . the rubber band 35 is preferably in the form of an elongated loop so that a double strand extends through the axial bore 34a of the spool . the pin 36 passes between the two strands so that when the spool is rotated the strands of the rubber band are twisted on one another . the rubber band 35 serves as an axle to support the spool for rotation and upon being twisted tends to rotate the spool in the opposite direction and thus provides power for driving the spool . a string 37 has one end secured to the spool and is wound around a central portion of the spool in a multiplicity of turns . the other end of the string extends out through a grommet 38 which is held in an eye formed by a loop 31c in the central part of the frame wire 31 and extends up through a hole 32b in the body 32 . a finger grip shown in the form of a ring 39 is attached to the outer end of the string 37 . the ring 38 also acts as a stop which prevents the end of the string escaping down through the grommet 38 . except as otherwise described , the toy shown in fig5 is like that of fig1 and 2 and operates in the same manner . the body 32 being formed of cellular or spongelike material is of light weight . the frame 31 is also light being formed of a single piece of wire . the spool 34 on the other hand is relatively heavy . for example it is formed of metal or dense plastic material . alternatively the spool 34 may be molded of plastic with metal inserts 40 for example of steel , copper or lead embedded in opposite ends of the spool . the spool is thus the heaviest part of the toy being heavier than the combined weight of the body and frame . by having the spool heavy , the center of gravity of the toy is kept low so that it does not readily upset . moreover , the spool is sufficiently heavy that if the toy is held above the floor and then released while holding the finger grip 39 on the end of the string 37 , the toy will drop to the floor by its own weight and the spool 34 is rotated by unwinding of the string 37 so as to twist the rubber band 35 . when the string is then released , the rubber band unwinds so as to propel the toy along the floor . the weight of the spool also increases its rotary inertia and thereby improves the performance of the toy . as in the embodiment illustrated in fig1 and 2 , a central portion of the spool on which the string is wound is concentric with the bore 34a while flanges 34b at opposite ends of the spool are elliptical or eccentric so as to cause the toy to move with a wobbling motion . rubber rings 31 on the flanges 34b act as tires so that the toy will operate even on a smooth surface . while preferred embodiments of the invention have been illustrated in the drawings and are herein particularly described , it will be understood that many modifications can be made and that the invention is thus in no way limited to the illustrated embodiments .
a moving toy comprises a foam plastic body , for example representing a mouse or rabbit , mounted on a u - shaped frame between the ends of which a weighted spool is rotatably mounted by means of a rubber band extending between the frame ends . a string wound on the spool extends out through a guide hole in the top of the body and is provided at its end with a hand grip . when the toy is released while holding the string , the toy drops to the floor whereby the unwinding string winds up the rubber band which thereupon rotates the spool to drive the toy . the ends of the spool are preferably eccentric so as to cause the toy to wobble .