Tethered aerial top

Details Tethered aerial top Tethered aerial top

1991-06-28

1992-03-31

Muir, David N.

Amusement devices: toys

Rotating or having visible rotating portion

Having attached cord for imparting rotation

446253, A63H 130, A63H 132

Patent

active

051003619

ABSTRACT:
Yo-Yo embodiments with extended spin time and reliable initiation for rewinding of the tether are disclosed. An axle bearing of low friction or "frictionless" type is used for extended spin time. Player control of tether tension causes elastic deformation of tether diameter, especially in a tether strand wrapped around the axle bearing. Tension constricts the cross-sectional diameter of the strand, holding it free of the Yo-Yo sides; loss of tension expands the strand, engaging it laterally in clutch-like surface contact with the Yo-Yo sides. Tension in the tether and its wrapped strand under conditions of common Yo-Yo weight and ordinary play produce small variations in strand diameter. Player control of strand engagement with and disengagement form the Yo-Yo sides is assured by infinitely fine adjustment of the gap between the sides and by secure seizing of the Yo-Yo parts to fix the desired gap. Long periods of reliable Yo-Yo performance and extended capability to players of ordinary skill are among the attained objectives and advantages of the invention.

REFERENCES:
patent: 2891351 (1959-06-01), Madafas et al.
patent: 3175326 (1965-03-01), Isaacson
patent: 3805443 (1974-04-01), Duncan, Jr.
patent: 3953936 (1976-05-01), Ennis
patent: 4130962 (1978-12-01), Ennis
patent: 4207701 (1980-06-01), Kuhn
patent: 4332102 (1982-01-01), Caffrey
patent: 4442625 (1984-04-01), MacCarthy
patent: 4895547 (1990-01-01), Amaral
Wolfgang Buzger, "The Yo-Yo: A Toy Flywheel", American Scientist, vol. 72, Mar.-Apr. 1984, pp. 137-142.

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