Illumination – Light source and modifier – Adjustable or repositionable light source or light source...
Patent
1998-11-02
2000-09-05
Sember, Thomas M.
Illumination
Light source and modifier
Adjustable or repositionable light source or light source...
362413, 362414, 362427, F21S 112
Patent
active
061132500
ABSTRACT:
A protecting device of a desk lamp comprises a seat, two clamping pieces, two parallel telescopic rods, an insulating stopper, a covering plate, a filament, a transformer, etc. A guide groove is formed on the seat. Each of the two sides of the guide groove is installed with a respect fixing rod. The lower end of one of the fixing rods is pivotally locked with a first ring. The upper ends of the fixing rods are pivotally connected with two conducted parallel telescopic rods. The upper ends of the two telescopic rods are connected with a lamp head and an insulating stopper is connected with the two telescopic rods. Two sets of trenches are installed on the bottom of the guide groove so that two clamping pieces are engaged thereon from the seat. Each of the clamping pieces is installed with a receiving portion. Each of the receiving portions is installed with a receiving hole. One of the receiving hole is locked into a second ring. Another receiving hole is locked on the lower end of another fixing rod. One side of each receiving hole is installed with a pair of adjacent guide pieces. A filament is installed between the two clamping pieces and a cover plate is connected on the opening of the guide groove. A transformer is installed within the seat. One of the primary sides of the transformer is connected with a fixing piece ring and another primary side is connected with a second ring. When the two telescopic rods are shorted by an intentional action, the filament is burnt out, thus the transformer is prevented to burn.
REFERENCES:
patent: 5176443 (1993-01-01), Lin
patent: 5265000 (1993-11-01), Lin
patent: 5396409 (1995-03-01), Cvek
patent: 5477443 (1995-12-01), Cvek
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