Current transfer bus and assembly

Claim 1

An assemblage for selectively interrupting transfer of electric current, said assemblage comprising, a circuit breaker having a housing and a pair of terminals for current supplied to and drawn from said breaker, at least a first of said terminals comprising a pair of vertically spaced resilient metallic terminal strips extending horizontally from said housing to free ends of said strips, said strips having respective bow-shaped inflections which are formed in said strips near said ends so that said inflections vertically project away from each other, said inflections having respective inner surfaces bounding opposite sides of a receptacle cavity defined between said strips by said inflections, and a current transfer bus comprising, a metallic rail having a lengthwise axis and extending horizontally along said axis normal to the horizontal extent of said terminal strips, said rail comprising an elongated central horizontal web having rear and front margins on horizontally opposite sides of said axis, and said rail also comprising rear and front vertically salient flanges integrally joined with said web at, respectively, said rear and front margins thereof, said front flange having in the vertical plane a cross-sectional shape which is of rounded outline and protuberant in both vertical directions from said web, and said front flange being received in said cavity to make respective areal contacts on opposite sides of such flange with said inner surfaces of said terminal strips, said web projecting in the horizontal transverse direction away from said front flange outwardly beyond said free ends of said terminal strips, and said rear flange being horizontally spaced away from said free ends.