Nonrotatable telescoping supporting structure

Details Nonrotatable telescoping supporting structure Nonrotatable telescoping supporting structure

1978-09-18

1980-12-09

Nelson, Peter A.

Illumination

Supports

Standard-type support

362285, 362289, 362431, F21S 312

Patent

active

042388180

ABSTRACT:
A nonrotatable telescoping supporting structure particularly suited for a pole lamp supporting means including an outer elongated tubular member of substantially cylindrical shape, an inner elongated member having at least one portion of reduced radial size with respect to the longitudinal central axis of the inner member. The reduced portion extends substantially along the entire length of the inner member and there is additionally provided a protuberance located along the inner surface of the outer member, which protuberance extends inwardly. Portions of the inner member in juxtaposition to the reduced radial portion move into engagement with the protuberance to prevent relative rotation between the members.

REFERENCES:
patent: 998323 (1911-07-01), Camp
patent: 2092592 (1959-09-01), Cole et al.
patent: 2301661 (1942-10-01), Weidenhoeft
patent: 2409075 (1946-10-01), Starck
patent: 2624537 (1953-01-01), Rouy
patent: 3012801 (1961-12-01), Cole
patent: 3586852 (1971-07-01), Bradley

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