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(11) | EP 0 682 346 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Plate casing having sealingly-mounted through insulators and manufacturing method |
| (57) A method of sealingly mounting electric insulators passing through a plate wall,
in particular for the manufacture of a housing case (10) for electric disconnecting
switches, comprises the steps of making a collar (14) projecting from the plate at
a passage hole (13) for the insulator; fitting the insulator (12) into the hole in
the direction of the collar (14) projection so as to bring, upon interposition of
a seal (18), an abutment edge (15) radially projecting from the insulator against
an edge of the hole on the side opposite to the collar projecting side; bending the
free end of the collar inwardly, forming a locking angle and forcing said end into
a circumferential seating (16) present in the insulator surface so as to prevent the
insulator from being withdrawn from the hole. In this manner a plate casing (10) for
an electric apparatus is achieved which has an excellent tightness between the casing
wall and the insulators passing therethrough. |