Convection rotated ornament

Details Convection rotated ornament Convection rotated ornament

1996-05-24

1997-02-25

Quach, Y. My

Illumination

Revolving

362294, 362356, 362444, 40441, F21V 2130

Patent

active

056053916

ABSTRACT:
A spinning ornamental incandescent bulb cover has a shade portion and a spinning turbine vane portion formed from a single flat sheet of flexible material. Convective air currents, generated by the heat of the bulb, are passed over the turbine vanes to rotate the entire shade. No internal or external support frame structure is required for the shade or the turbine vanes. The turbine vanes meet at a common central point at which there is located a downwardly directed needle which rides in a bearing to allow rotation. The bearing is provided by a small cup held by a spring which engages the bulb. The needle point support also provides for automatic vertical alignment of the shade regardless of the orientation of the needle. The overall shape of the shade is frustoconical so as to converge the convective air currents and increase their velocity relative to the turbine vanes. The turbine vanes have a varying angle of attack in the radial direction for increased efficiency.

REFERENCES:
patent: 2511394 (1950-06-01), Wynnyk
patent: 3263353 (1966-08-01), Quinn
patent: 3435201 (1969-03-01), Kemenczky

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