Blade suspension assembly for a circuit breaker

H - Electricity – 01 – H

Patent

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Details

H01H 71/00 (2006.01) H01H 69/00 (2006.01) H01H 77/10 (2006.01) H01H 1/22 (2006.01)

Patent

CA 2158966

A blade suspension assembly for a circuit breaker comprises a pivot pin, a torsion spring, an elongated blade, and a blade carrier. The torsion spring includes a lateral middle section, a pair of end legs disposed on opposite sides of the middle section, and a lateral hole extending therethrough. The blade includes an electrical contact mounted thereto, a lower bearing surface, and a lateral circular aperture. The blade carrier includes first and second pairs of bearing surfaces. To assemble the blade suspension assembly, the torsion spring is placed over the blade with the lateral middle section abutting the lower bearing surface of the blade, with the end legs disposed on opposite sides of the blade, and with the lateral hole in the torsion spring disposed in line with the circular aperture in the blade. Next, the pivot pin is inserted through the lateral hole in the torsion spring and through the circular aperture in the blade. The combination of the blade, the torsion spring, and the pivot pin is then inserted into the blade carrier with the pair of end legs abutting respective ones of the first pair of bearing surfaces and opposite ends of the pivot pin abutting respective ones of the second pair of bearing surfaces.

Un ensemble de suspension à lame pour coupe-circuit comporte un pivot, un ressort de torsion, une lame de forme allongée et un porte-lame. Le ressort de torsion comporte une section intermédiaire latérale, une paire de branches terminales situées de part et d'autre de la section intermédiaire, et une ouverture latérale transversante. La lame est pourvue d'un contact électrique, d'une surface de support inférieure et d'une ouverture circulaire latérale. Le porte-lame est pourvu de deux paires de surface de support. Pour monter l'ensemble de suspension à lame, on pose le ressort de torsion sur la lame, sa section intermédiaire latérale reposant sur la surface de support inférieure de la lame, les branches terminales étant disposées de chaque côté de la lame, et l'ouverture latérale coïncidant avec l'ouverture circulaire de la lame. On introduit le pivot dans l'ouverture latérale du ressort de torsion et dans l'ouverture circulaire du porte-lame. On insère ensuite l'ensemble formé par la lame, le ressort de torsion et le pivot dans le porte-lame, les paires de branches terminales reposant sur chacune des surfaces de support respectives de la première paire de surfaces de support, et les extrémités opposées du pivot reposant sur les surfaces de support respectives de la seconde paire de surfaces de support.

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