Contact means for a weather resistance and solar radiation teste

Details Contact means for a weather resistance and solar radiation teste Contact means for a weather resistance and solar radiation teste

1976-03-29

1977-09-20

Corbin, John K.

Optics: measuring and testing

With plural diverse test or art

339 5R, 356244, G01N 2124, H01R 3902, H01R 3908

Patent

active

040493512

ABSTRACT:
Improved contact means for use in a weather resistance and solar radiation tester having a specimen rotating frame having leads extending through the shaft and a meter for indicating the amount of light received by the light receiving element. The improved contact means is for electrically connecting the leads to the meter, and has a rotating shaft connected to the shaft for the specimen rotating frame, upper and lower cases surrounding the rotating shaft and in which the rotating shaft is rotatably journaled and defining two separate compartments spaced along the rotating shaft and sealed from each other, the cases being of electrically insulating material. A metal ring is fixed in the bottom of each case and a lead extends from each ring out through the respective case for connection to the meter. A plate spring in each compartment is fixed to the rotating shaft, and contact pieces on the ends of the plate spring in each compartment are held in sliding contact with the metal ring therein. The leads extend through the rotating shaft into the compartments and are electrically connected to the contact pieces therein. An electrically insulating liquid is provided in each compartment covering the rings and contact pieces therein, whereby deterioration of the resistance value of the contact means is avoided by elimination of the contamination due to contact wear.

REFERENCES:
patent: 1460037 (1923-06-01), Pierson
patent: 3889531 (1975-06-01), Suga

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