A swing drive mechanism is provided for use with infant's and child's swings. The swing drive mechanism provides an input mechanism, an output mechanism, and a torsion spring member disposed between the input mechanism and the output mechanism. The torsion spring member includes a first portion and a second portion that interact together to produce a desirable spring gradient while also reducing the overall length of the torsion spring member. The torsion spring member is secured into attachment...

A swing assembly includes a support frame, a pair of linking units, a seat unit, and a pair of pivot connecting units. The support frame has upright left and right frame portions adapted to be supported on a ground surface, and a horizontal bar interconnecting the left and right frame portions. The linking units are disposed between the left and right frame portions. Each of the linking units has an upper end connected pivotally to the horizontal bar, and a lower end. The seat unit is disposed b...

A swing trainer for training and improving the swing of golfers and baseball players which comprises a base platform, a pair of post elements mounted on said base, a wide belt adapted to be worn around the waist of a trainee, and resilient means attached to each of the post elements and to said belt whereby one of said resilient means is attached to said belt at the rear side thereof and the other one of said resilient means is attached to one side thereof The post elements can be vertically adj...

A hanging chair includes a generally rectangular seat frame and a generally rectangular backrest frame pivotally attached to the seat frame with a pliable sheet secured to and extending across the seat frame for providing a seat support surface and a pliable sheet attached to and extending across a portion of the backrest frame for providing a backrest and including flexible support members such as cables secured to the seat frame for hanging the chair from an overhead structure. The frame inclu...

A hydraulically actuatable swing clamp, particularly for the clamping of objects on the table of a machine tool, includes a housing with a piston arranged therein, the latter having a piston rod extending in sealed manner out of the housing. The piston rod carries a clamping arm which in addition to a pure axial clamping motion, performs a swinging motion, effected by a guide device. The guide device includes a normally non-rotatable control bolt arranged on the housing extending into the piston...

An electric swing mechanism includes a battery powered solenoid which exerts a motive force on a swinging infant seat. The solenoid is activated by the linear reciprocation of a specially designed actuator past a microswitch, so that the switch is closed and the solenoid activated in only one direction of the stroke. The mechanism's linkage system is designed to contact the swinging infant seat during only half of the seat's swinging cycle, and is mechanically isolated from the seat during the o...

In a swing bridge for conversion of rotary motion of an eccentric driven by a motor shaft into a reciprocating movement of the power output for a tool in electrically powered appliances, consisting of a bridge yoke comprising the power output and mounted on two strip-shaped film hinges and a connecting rod coupled to the swing bridge and the eccentric, aligned parallel to the bridge yoke, one of the strip-shaped film hinges and the corresponding wall of the bridge yoke are each provided with an ...

A powered work clamping device includes a housing having an upper chamber and a lower chamber, and a piston in the lower chamber connected to an index rod which projects into the upper chamber. The index rod is axially movable but not rotatably movable, and is biased to an upper position. A plunger extends from the housing and has a work engaging member at one end with a piston at its other end disposed within the upper chamber. The plunger is mounted on the index rod for axial and rotative move...

A toy with a swing wherein on a perch member of a swing a monkey toy member is mounted. The perch member has a switching mechanism and cells therein. The monkey toy member has a driving mechanism electrically connected to the cells, a swinging mechanism connected in association to the driving mechanism for swinging the monkey toy member forwards and backwards, a tail moving mechanism connected in association to the driving mechanism for curling and extending a tail of the monkey toy member, and ...

In a hopper or the like wherein the flow of particulate material is controlled by a gate the improvement wherein the gate is mounted to be swingable towards an open position within the hopper so as to break arches and rat holes which form in the material above the gate or a gate adjacent thereto.