H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/251
H01H 33/20 (2006.01) H01H 9/46 (2006.01)
Patent
CA 1051070
LOW-VOLTAGE CIRCUIT-BREAKER HAVING SMALL CONTACT SEPARATION AND SMALL GAP BETWEEN COOPERATING PARALLEL-ARRANGED ARCING-RAILS ABSTRACT OF THE DISCLOSURE An improved low-voltage circuit-breaker, adaptable for both alternating-current and direct-current is provided having small contact separation, when opened, and a pair of adjoining arcing-rails arranged in generally parallel relationship, and having only a small gap therebetween of the order of 1/4 inch or less. Preferably, at the ends of the parallel-arranged arcing-rails are a-pair of diverging arc-horns, constituting integral extensions of the parallel- arranged arcing-rails, and resulting in considerable elonga- tion of the established arc upon its movement onto the diverging portions of the arcing-rails. Preferably, although not necessary, a suitable spaced-plate arc-extinguishing structure is arranged in the vicinity of the diverging portions of the arcing- rails to further facilitate arc extinction, by either elongating the arc around the splitter portions of the insulating plates, if the latter are of insulating mate- rial, or causing the formation of a plurality of serially- related arc-portions between spaced conducting metallic plates, if the arc extinguisher is of the spaced-metallic- plate variety.
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