Electro-mechanical devices incorporating fuse cartridges
AssigneeFerraz
InventorsJean P. Cinquin, Christian Gazzolo, Michel Pisciotta
Life of this patent
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Abstract
An electro-mechanical circuit breaker device incorporating a fuse cartridge, wherein two contact bars are normally connected by a series of mobile contacts held against their lower edge by springs, two in number for each. An insulating plate, suitably guided at its edges in the insulating envelope of the apparatus, receives the downward displacement that a coil applies by the Thomson effect to an aluminum disc, and it lowers the contacts against spring and latches them in open position by engagement of a bolt in a notch. The lower edge of the plate is provided with teeth to receive the successive contacts and retain them transversely, while each of the mobile contacts is notched to ensure lengthwise retention.
Claims8
An electro-mechanical circuit breaker having improved structure, the breaker being of the type having opposed fixed contacts spaced apart across a gap and having an insulating plate guided in a housing for reciprocation within the gap, the plate being spring-urged from a open position to a closed position and the plate carrying mobile contacts which in the closed position connect said fixed contacts together and which in the open position are spaced therefrom, and the breaker having a conductive disc in the housing disposed normal to the plate and having a coil in the housing disposed adjacent to the conductive disc on the opposite side thereof from the insulating plate and operative when the coil is energized to repel the conductive disc against the plate and drive it from its closed position toward a fully open position, and the breaker having a fuse cartridge connected in shunt with the fixed contacts and operative to melt after a brief delay when the contacts are driven open, the improvements comprising:
- (a) a latch bolt supported in the housing and spring-urged toward the insulating plate, and the plate having a latching notch therein disposed to lie opposite the latch bolt when the plate is in fully open position;
- and
- (b) the housing retaining the conductive disc between the coil and the insulating plate and normal to the plate and having a shoulder disposed to stop motion of the disc after it has driven the plate part-way toward its fully open position, the kinetc energy of the insulating plate carrying it the rest of the way to latch with the bolt in fully open position.
Dependencies are inferred from the claim text.