Retractable device for a desk lamp

Details Retractable device for a desk lamp Retractable device for a desk lamp

1991-04-30

1992-03-31

Lazarus, Ira S.

Illumination

Supports

Counterbalanced support

362413, 362418, 362431, F21V 2122

Patent

active

051013320

ABSTRACT:
This invention relates to a retractable device for a desk lamp and in particular to one which including a tubular cylindrical casing having an end for connecting with an appropriate position of the desk lamp, a piston rod provided with an outer end for connecting with an appropriate position of the desk lamp and extending into the cylindrical casing, an annular ring fixedly mounted within the cylindrical casing for receiving a first rubber ring, a cap engaged with the other end of the tubular cylindrical casing, a plug mounted at the other end of the tubular cylindrical casing, and a second rubber ring disposed between the cap and the plug.

REFERENCES:
patent: 1574908 (1926-03-01), Lamp
patent: 2299683 (1942-10-01), Curtis
patent: 3008742 (1961-11-01), Goldstein
patent: 4488209 (1984-12-01), Gosswiller

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