Swivel unit for adjustable lighting fixture

Details Swivel unit for adjustable lighting fixture Swivel unit for adjustable lighting fixture

1980-11-06

1983-05-10

Desmond, Eugene F.

Geometrical instruments

361421, F21M 318

Patent

active

043826474

ABSTRACT:
This disclosure depicts a novel environmentally sealed and manually controlled swivel unit for use in an adjustable lighting fixture. The swivel unit comprises a base for establishing electrical and mechanical connection with a source of electrical power and is attached to a housing having a central housing bore. The swivel unit further comprises a swivel ball device having a spherical body and a tube extending from the spherical body with a means for sealing the swivel ball device within the housing. A lamp-holder is attached to the end of the tube. The swivel unit also comprises a minimum friction swivel ball controller and circular plate and a tension means for forcing the swivel ball controller against the swivel ball device, and, in turn, for forcing the swivel ball device against a shoulder of the housing. This defines a predetermined lamp-holding force. The swivel ball controller allows the swivel ball device to rotate about a first axis and also to rotate about a second axis perpendicular to the first axis. The swivel ball device and the shoulder on the housing form an environmentally sealed juncture.

REFERENCES:
patent: 1411048 (1922-03-01), McCosh
patent: 2231565 (1941-02-01), De Reamer et al.
patent: 2859983 (1958-11-01), May
patent: 3072426 (1963-01-01), Gilbert
patent: 3341230 (1967-09-01), Wichers
patent: 3409315 (1968-11-01), Wichers et al.
patent: 4333132 (1982-06-01), Paley

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