US3075764A

US3075764A - Acrobatic toy

Info

Publication number: US3075764A
Application number: US128991A
Authority: US
Inventors: Lorean Jack Z De
Original assignee: Individual
Current assignee: Individual
Priority date: 1961-08-03
Filing date: 1961-08-03
Publication date: 1963-01-29
Anticipated expiration: 1980-01-29

Description

Jan. 29, 1963 z, DE LOREAN 3,075,764"

ACROBATIC TOY 2 Sheets-Sheet 1 Filed Aug. 3. 1961 INVENTOR.

JACK Z. DE LOREAN WILSON, SETTLE 8: CRAIG ATTORNEYS Jan. 29, 1963 J. z. DE LOREAN 3,075,764

AcRoBA'rIc TOY Filed Aug. 5, 1961 2 Sheets-Sheet 2 WILSON, SETTLE 8 CRAIG ATTORNEYS ite The present invention relates to an acrobatic toy, and more particularly to a jumping device for use by two people in which the participants are alternately propelled upwardly into the air as a result of actuation of the device by the other participant.

The present device is comparable to a trampoline. The trampoline has recently enjoyed wide spread popularity as a recreational device. Trampolines comprise a sheet of fabric material mounted on springs over a pit in the ground. In use, a person stands on the fabric and jumps into the air. Upon landing, the mounting springs are stretched, and upon returning to their normal spring position, cause the person on the trampoline to be thrown into the air.V This process is repeated until the person is thrown into the air to a height which permits him to do acrobatic` t'rick's. The present invention provides a device similar in function to the trampoline but which may be used by two persons at the same time and which is relatively inexpensive, permitting ownership by a family of moderate means.

It is an object of the invention to provide an acrobatic toy device in the general shape of a teeter-totter.

Another object of the invention is to provide such a device having a platform at each end for a person to stand on.

' A further object' of the invention is to provide a reinforced spring portion at the center of the device to cause upward propulsion of one end of the device when the other end strikes the ground.

A further object of the invention is to -provide means for shifting the platforms longitudinally to compensate for differences in weight of the users.

Another object is to provide, in one embodiment, a base which permits mounting of the device at different vertical levels.

A still further object of the invention is to provide in one embodiment a spring construction in which the forces on the spring are distributed to avoid spring damage.

Other objects of this invention will appear in the following description and appended claims, reference being had to the accompanying drawings forming a part of this specification wherein like reference characters designate corresponding parts in the several views.

In the drawings:

FIGURE l is a side elevational view of one embodiment of the acrobatic toy of the present invention;

FIGURE 2 is a top plan View of the acrobatic toy of FIGURE l;

FIGURE 3 is a view in perspective of a second embodiment of the base for the device of FIGURE 1 which permits mounting of the spring portion at different vertical levels;

FIGURE 4 is a side elevational view of a second embodiment of the acrobatic toy wherein the spring means are modified to distribute the force on the spring after initial springing; and FIGURE 5 is a side elevational view of another embodiment of the spring construction.

Before explaining the present invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the acompanying drawings, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also, it

rates `arent ECC is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.

Referring to FIGURES 1 and 2, it may be seen that the acrobatic toy 10 comprises a base 12 upon which is mounted an elongated springboard 14. The base, which rests on the surface 16 of the ground, includes a pair of generally triangular upright support members 18, 2t) which are spaced apart by a circular pivotal support bar 22 mounted between the apexes of the triangles.

The-springboard 14 is pivotally mounted intermediate its ends on the bar 22. The springboard includes a pair of spaced apart elongated

wooden board elements

24, 26. A

platform

28, 30 is mounted at each end of the boards by

bolt structures

32, 34. The upper surfaces of the platforms are preferably provided with an abrasive material to insure firm footing. Additional openings 36, 33 are provided in the

boards

24, 26 in front of the platforms to permit positioning of either or both of the platforms closer to the pivot point of the springboard. Such positioning reduces the lever advantage and compensates for difference in weight of the persons using the device.

A reinforcing spring structure is provided for the

boards

24, 26. This structure includes a

board

40, 42 of intermediate length beneath the

boards

24, 26 and a

small board

44, 46 provided beneath each of the

boards

40, 42. A

pivot support bracket

48, 50 is positioned beneath

eachboard

44, 46 and the entire assembly is secured together by bolt structures 52. The brackets 4S, 50 have circular recesses 54 for pivotal mounting on the bar 22. A U-shaped strap 56 is provided on each

bracket

48, 50 and extends around the bar 22 to prevent separation of the base and springboard during use.

In operation, one person stands on each of the platforms 2S, 30. By a shift in weight, the springboard is caused to pivot about the bar 22. When one end of the springboards strikes the ground surface 16, the opposite end is caused to whip or be sprung upwardly by the action of the spring structure. This throws the person standing on this end of the springboard upwardly into the air. When that person comes down, he lands on his platform causing the springboard to pivot in the opposite direction, thus throwing the second person into the air. This process is repeated, and with each successive pivoting the participants are thrown higher and higher. With practice, it is possible to rise to a height exceeding three feet. When the participants are being propelled several feet into the air, it is possible for them to perform acrobatic tricks such as turns in the air and somersaults.

While the spring structure of the springboards has been described in terms of wooden boards, it will be readily apparent that other spring materials, such as steel leaf springs and the like could be substituted for the boards. FIGURE 3 illustrates a modified base structure 58 for use in connection with the springboard of FIGURE 1. The base 58 has a pair of spaced apart triangular members `60, 62 which are secured together by support mem-v ber 64. A plurality of vertically stepped recesses 66, 6g are provided in one of the upwardly slanting edges Fitl, 72 of each member 6ft', 62. Each pair of oppositely disposed recesses 66, 68 is adapted to receive a pivotal support bar 74. The bar 74 is provided with an enlarged portion 76, 78 at each end to retain it within the recesses. The bar may be placed in any pair of recesses to thus permit vertical adjustment thereof. After the bar has been set in a pair of recesses, the springboard 14 is mounted thereon to complete the structure. As will be readily appreciated, the lower the bar is placed, the less spring will be possible with the device. More skillful players prefer the upper position of the bar while novices and young children use the bar in a lower position.

3 FIGURE 4 illustrates a second spring arrangement for the springboard. In the FIGURE 4 embodiment, the base 12 and springboard elements 24, 2o and platforms 2S, 3u are arranged as previously described. However, a

email board' Sii is placed next adjacent the mainboard and,

a board SZ of intermediate length is positioned beneath the small board 0.- VThe entire structure is secured together by bolt structures .34.

. In operation of the FiGURE 4 embodiment, when the boards'24, 2d have been Ideflecteda predetermined degree, they will contact the outer ends de, S3 of the intermediate length boards 32. At this time, the stress point on the spring system will be shifted to the outer ends of the intermediate length boards 32 to limit the stress-concentration applied to the

Vmain boards

24, 26.

FIGURE 5 illustrates a third embodiment of the spring structure for the device. ln FIGURE 5, the base 12 and

long boards

24, 26 are constructed as in the FGURE l embodiment. However, use of two boards for the spring portion is eliminated and one board 9G is substituted therefor'. As will be noted, the board gilV is thickest at thel center 92 and tapers to thinner sections at the outer ends 94, 95. The configuration of the board 9b results in a spring action simiiar to the spring action of the boards dii-46 of the FEGURE l embodiment.

Having thus described my invention; l` claim:

1. An acrobatic toy comprising a base adapted to be seated on a horizontalsupport surface; an elongated springboard pivotally mounted intermediate its ends ony the base for vertical pivoting; structure at each end of the springboard for a person to stand upon; the pivot point of the springboard being positioned above the horizontalsupport surface a height to permit the ends thereof to strike sai-d support surface during pivoting; a spring structure in contacting relation with the underside of the springboard intermediate the ends of the springboard to cause one end of the springboard to be sprung upwardly when the other end strikes the horizontal support surfaceV whereby the person standing on the upwardly sprung end will be propelled into the 2. An acrobatic toy comprising a base adapted to be seated on a horizontal support surface; an elongated springboard pivotally mounted intermediate its ends on the basev for vertical pivoting; structure at each end of the springboard for a person to stand upon; the pivot point of the springboard being positioned above the horizontal support surface a height to permit the ends thereof to strike said support surface during pivoting; said springboard having a leaf spring structure intermediate its ends to cause one end of the springboard to be sprungupwardly when the other end strikes the horizontal support surface whereby the person standing on the upwardly sprung end will be propelled into the air.

3. An acrobatic toy comprising a base adapted to be seated on a horizontal supportsurface; a vertically adjustable support member on the base; an elongated springboard pivotally mounted intermediate its ends on said support member for vertical pivoting; structure at each end of the springboard for a person to stand upon; said support member being positioned above the horizontal support surface a height Vto permit the ends of the springboard to strike said support surface during pivoting; a spring structure in contacting relation with the underside of the springboard intermediate the ends of the springboard to cause one end of the springboard to be sprung upwardly when the other end strikes the horizontal support surface whereby the person standing on the upwardly sprung end will be propelled into the air.

4. An acrobatic toy comprising a base adapted to be seated on a horizontal support surface; an elongated springboard pivotally mounted intermediate its ends on the base for vertical pivoting; platform structure at each end of the springboard for a person to stand upon; said platform structure being adjustable along the springboard to vary the leverage, with respect to the pivot point, of a person standing on the platform structure; the pivot point of the springboard being positioned above the horizontal support surface a height to permit the ends thereof to strike sai-d support surface during pivoting; a spring structure in contacting lrelation with the underside of the springboard intermediate the ends Yof the springboard to cause one end of the springboard to be` sprung upwardly when the other end strikes the horizontal support surface whereby the person standing on the upwardly sprung end will be propelled into the air.

5. An acrobatic toy comprisinga base adapted to be seated on a horizontal support surface; an elongated springboard pivotally mounted intermediate its ends on the base for vertically pivoting; structure at each end of the springboard for a person to stand upon; the pivot point of the springboard being positioned above the horizontal support surface a height to permit Vthe ends thereof to strike said support surface during pivoting; said springboard having a spring portion intermediate its ends comprising a plurality of overlaid spring elements of successively shorter lengths; said spring structure causing one end of the springboard to be sprung upwardly when the other endrstrikesthe horizontal-supportsurface whereby the person standing on the upwardly spr-ung end will be propelled into the air. Q ,I

6l. An` acrobatic toy comprising a -base adapted to be seatedon .a horizontal support surface; an elongated springboard pivotaliy mounted intermediate its ends on the base for vertical pivoting; structure ateach end of the springboard for a person to stand upon; the pivot point of the springboard-.being positioned above the horizontal support surface a height to permit the ends thereof to strike said support surface during pivoting; said springboard having a spring portion intermediate its ends comprising a first elongated spring member secured to the undersurface of the springboard and centered over the pivot point of the springboard; a second elongated spring member mountedl beneath the first spring. member; said second spring member being longer than the first spring member whereby the ends thereof extend beyond the ends of the rst spring member and are spaced from the undersurface of the springboard; said spring members causing one end of the springboard to be sprung upwardly when the other end strikes the horizontal support surface whereby the person standing on the upwardly sprung end will be propelled into the air; said second spring member acting, upon contact of one of its ends with the undersurface of the springboard, to shift the stress point and limit the stress applied to the springboard. y

7. An acrobatic toy comprising a base adapted to be seated on a horizontal support surface; an elongated springboard pivotally mounted intermediate its ends on the base for vertical pivoting; structure at each end of the springboard for a person to standV upon; the pivot point of the springboard being positioned above the horizontal support surface a height to permit the ends thereof to strike said support surface during pivoting; said springboard having a spring portion intermediate its ends co;l prising an elongated spring member which is thicker at its midsection than at its ends; said spring portion causing one end of the springboard to be sprung upwardly when the other end strikes the horizontal support surface whereby the person standing on the upwardly sprung end will be propelled into the air.

8. An. acrobatic toy comprising a base adapted to be seated on a horizontal support surface; a pivot bar on the base; an elongated springboard comprising spaced apart elongated elements joinedA together at each end by a platform structure for a person to stand upon; a leaf spring structure mounted beneath each of the elongated elements; a pivot support bracket mounted to the undersurface of each leaf spring structure; said springboard being pivotally mounted on the base with the pivot support bracket seated on the pivot bar; the pivot point ofthe springboard being positioned above the horizontal support surface a height to permit the ends thereof to strike said support surface during pivoting; striking of the support surface causing one end of the springboard to be sprung upwardly through the action of the leaf spring structure whereby the person standing on the upwardly sprung end of the springboard will be propelled into the air.

6 References Cited in the le of this patent UNITED STATES PATENTS 2,431,138 Ressinger Nov. 18, 1947 FOREIGN PATENTS 127,858 Austria Apr. 25, 1932 268,919 Italy NOV. 2, 1929

Claims

1. AN ACROBATIC TOY COMPRISING A BASE ADAPTED TO BE SEATED ON A HORIZONTAL SUPPORT SURFACE; AN ELONGATED SPRINGBOARD PIVOTALLY MOUNTED INTERMEDIATE ITS ENDS ON THE BASE FOR VERTICAL PIVOTING; STRUCTURE AT EACH END OF THE SPRINGBOARD FOR A PERSON TO STAND UPON; THE PIVOT POINT OF THE SPRINGBOARD BEING POSITIONED ABOVE THE HORIZONTAL SUPPORT SURFACE A HEIGHT TO PERMIT THE ENDS THEREOF TO STRIKE SAID SUPPORT SURFACE DURING PIVOTING; A SPRING STRUCTURE IN CONTACTING RELATION WITH THE UNDERSIDE OF THE SPRINGBOARD INTERMEDIATE THE ENDS OF THE SPRINGBOARD TO CAUSE ONE END OF THE SPRINGBOARD TO BE SPRUNG UPWARDLY WHEN THE OTHER END STRIKES THE HORIZONTAL SUPPORT SURFACE WHEREBY THE PERSON STANDING ON THE UPWARDLY SPRUNG END WILL BE PROPELLED INTO THE AIR.