Means for assembling two enclosures of an electrical cutout apparatus

Means for assembling together two communicating enclosures of an electrical cutout apparatus filled with a dielectric fluid under pressure and traversed by a control rod for actuating the cutout means, which assembling means comprises, in view of separating said two enclosures, an intermediate, slidable sealing air lock and two vertically spaced apart sealing rings on a boss and a flange respectively of said control rod, operable to simultaneously seal one enclosure on one side of the air lock and the other enclosure on the other side of the air lock, said air lock comprising two separable portions which when separated respectively become fast with one and the other enclosures, the part of said control rod within said air lock having two cooperating circular flanges separable for separating said rod into first and second sections which are fast with respective portions of said enclosures, said air lock consisting of a cylindrical space formed between the end of said first section of the rod and the inside of a hollow piston and being bounded on one side by said seal-fitted boss on said first rod section cooperating with a first portion of said piston and on the other side by said seal-fitted flange on said second section of the rod cooperating with the second portion of said piston, said first enclosure having at its lower end a first assembly plate for mounting on a second assembly plate on the upper end of said second enclosure, said first plate comprising a cylindrical sleeve against the inside of which is arranged a slide block attached to said second plate and also carrying a sealing ring, said first portion or head of said piston being slidably arranged and fitted with a seal within said cylindrical sleeve and said second or outwardly directed bottom flange portion of said piston being slidably arranged and fitted with sealing means within said slide block, wherein said assembling means is provided an internally threaded sleeve screwably cooperating with a thread on a portion of the outside surface of said slide block and is further provided with means for making said threaded sleeve and said piston slidably fast.