US2827950A - Swing - Google Patents

Description

H. c. KENT March 25, 19,58

SWING Filed. Nov. 26, 1956 Inumlbr 3 spindle again, but in the opposite direction to that in which it was previously wound. As the movement of the swing in its initial direction comes to an end, and said swing commences, under the action of gravity, to move in the opposite direction, the driving bar 12 is again depressed by way of'its footrests to unwind the strap 9 once again from the propeller spindle 6, but during this movement the propeller is rotated in the opposite direction to that in which it rotated initially, due to the fact that the strip 9 has been wound round said spindle in the opposite direction to that in which it was initially wound. Consequently during this second swinging movement of the swing, the propeller imparts a driving force to the swing which is directed inthe same direction of movement as that which the swing has now adopted under the action of gravity. Due to the abovedescribed automatic reversal of the direction in which the strap 9 is wound on the propeller spindle 6 at the end of each depression of the driving bar 12, and to the automatic raising of the driving bar during re-winding of the strap on said propeller spindle, each actuation of the propeller 8 thus'automatically ensures that it is set for a subsequent rotation in the correct direction, that is to assist the new direction of movement of the swing on each reversal of movement of said swing.

If desired a hand grip may be provided on the elongated beam 1 forwardly of the seat, in order to provide a steady hold for a person occupying said seat and in fact, in the swing shown in the drawing, the bracket 4 itself serves this purposes. The degree of swinging movement of the framework may clearly be governed by the force with which the driving bar 12 is pressed downwardly by the person occupying the seat, and the extent of angular movement of said driving bar may, if desired, be restricted both at the upper and at the lower limits by the provision of suitable stops; It will be appreciated that when the momentum of the propeller 8 winds the strap around the propeller spindle 6, when the driving bar 12 reaches its upper limit of movement, there can be a considerable pull exerted on said strap, and it is 'for this reason that the springs 15 are arranged between the lower end of the strap and its effective point of fastening to the forward end region of the driving bar.

The framework of the swing may, if desired, be covered by or form a part of any desired outer body, such as a vehicle, ship or aircraft body, and for added realisation the body may include ground wheels, wings or the like details.

A smoother operation of the propeller may be obtained by providing on the spindle 6, a flat allowing the rod to be received therein by carrying said rod on appropriately shortened split keys 11. This enables the strap 9 to be wound on the spindle 6 in a more balanced manner.

,I claim: t

*1. A swing comprising a pivotally suspended framework, a rotatable spindle carried by said framework, a propeller .carried by said spindle, a driving bar pivotally connected to said framework, and a flexible strap connected atone end to said spindle and connected at its opposite end to said driving bar, the connection between said one end of said strap and said spindle permitting said strap to wind around said spindle and to unwind from said spindle and said spindle being rotatable in response to unwinding movement of said strap whereby, when saidstrap is moved in response to movement of said driving bar, said strap may unwind from and rotate said spindle to thereby rotate said propeller;

2. A swing comprising an elongated beam having a forward end and a rear end, a pair of spaced-apart transverse spars carried by said beam, there being a spar adjacent each end of said beam, an inverted U-shaped bracket carried by each spar, the bracket adjacent the rear end of said beam having legs extending downwardly below said beam, a shaft connected to and extending horizontally between said downwardly extending legs, an elongated driving bar having one end pivotally connected to said shaft, a rotatable spindle carried by said beam at the forward end of said beam, a propeller carried by and rotatable with said spindle, and an elongated flexible strap having one end connected to said rotatable spindle and its opposite end connected to said driving bar, the connection between said one end of said strap and said spindle permitting said strap to wind around said spindle and unwind from said spindle, and downward movement of said driving bar with respect to said beam causing said strap to unwind from and rotate said spindle to thereby rotate said propeller. t v

3. A swing comprising an elongated beam, elon gated driving bar, means carried by said beam pivotally connecting one end of said driving bar adjacent one end of said beam, the other end of said driving bar being free to move in an arcuate path of movement, means connected to the opposite end of said beam rotatably supporting an elongated spindle, a propeller carried by said spindle, a flexible strap having one end connected to said spindle to permit said strap to wind around said spindle and unwind from said spindle, said spindle being rotatable in response to movement of said strap when said strap is unwound from said spindle, and resilient means connecting the other end of said strap to said free end of said driving bar, said resilient means provid ing a shock-absorbing connection between said other end of said strap and'said driving bar.

4. A swing comprising an elongated framework, an elongated driving bar pivotally connected at one end to said framework adjacent one end of said framework, said driving bar extending downwardly with respect to said framework and having a lower end positioned beneath the forward end of said framework, said framework including a U-shaped bearing bracket at the forward end of said framework, a spindle journalled in said bracket, a propeller carried by said spindle, said framework also including a pair of spaced-apart transverse sparsproviding suspension means for the swing, and a flexible strap having one end connected to said spindle 'and its other end connected to said driving bar lower end, the connection between'said spindle and one end 7 of said strap permitting said strap to wind around said spindle and unwind from said spindle, and said spindle being rotatedrby' said strap when said strap moves in response to downward movement of said driving bar.

5. A swing according to claim 4 including a rod positioned adjacent to and parallel to said spindle, and a pair of keys connecting said rod to said spindle, said strap having an upper end connected to said rod and said rod being rotatable with said spindle to wind said strap around said spindle and said rod.

References Cited in the tile of this patent UNITED STATES PATENTS

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