Electric lamp and discharge devices: consumable electrodes – Frames and electrode supports – Adjustable electrode supports
Patent
1977-06-10
1978-09-12
Envall, Jr., R. N.
Electric lamp and discharge devices: consumable electrodes
Frames and electrode supports
Adjustable electrode supports
314 68, 314 56, H05B 3120, H05B 3148
Patent
active
041140672
ABSTRACT:
An improved electrode operating mechanism for control of the discharge of carbon arc lamps for light fastness testing devices. Vertically spaced upper and lower electrode holders have a plurality of electrodes opposed to each other. Two vertical supports extend between upper and lower bases, the vertical supports each having a pair of spaced parallel guide rails extending therealong, each holder having laterally projecting arm members extending from the opposite ends thereof and between the rails. A cylindrical slide member is mounted on the end of each arm member and is slidably engaged in linear sliding contact with the surface of the parallel rails on the sides thereof away from the holders. First wires are attached to the cylindrical slide members on the lower electrode holders and extend upwardly through the upper base through axial bores in the upper cylindrical slide member, and two second wires attached to the upper holders extend upwardly through the upper base. The first wires are wound in one direction around two pulleys on a horizontal shaft on the upper base and the second wires are wound in the opposite direction around other pulleys on the shaft. When the shaft is rotated in one direction the electrodes are moved toward each other and when the shaft is rotated in the opposite direction the electrodes are moved away from each other.
REFERENCES:
patent: 576802 (1897-02-01), Baurlin
patent: 728902 (1903-05-01), Girdlestone et al.
patent: 801637 (1905-10-01), Batault
patent: 3046437 (1962-07-01), Kuppens
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