Patent
1978-08-25
1980-03-25
Bell, Jr., Houston S.
46 73, A63H 2712
Patent
active
041943163
ABSTRACT:
A diabolo top comprises bowl-shaped halves of molded plastic, each half having a central hub formed with an axial opening and coacting aligning pin means. A threaded bolt, extending through the axial openings, mounts a nut and retains the hubs in face-to-face abutment as a bottom of a deep annular groove formed by and between convex wall surfaces of the halves. The conventional string, manipulated at opposite ends thereof to spin the top on a horizontal axis, engages the deep annular groove and coacts with the convex wall surfaces for balancing the top thereon preparatory to spinning. The aligning pin means, which include pins terminating in tapered ends, coact with flexible webs engaging the bolt and nut to facilitate flexure of a portion of the hubs away from each other on impact of the peripheral rims of the halves to avoid breakage. A ground engaging support bracket is removably attachable to the hubs by the axial bolt and nut as a means for converting the diabolo to a ground supported vertical axis spinning top. The spinner attaches to a string as a Yo-Yo and the halves, when disassembled, may be used as frisbees.
REFERENCES:
patent: 2891351 (1959-06-01), Madaras et al.
Barnett Erwin M.
Bell, Jr. Houston S.
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