Abstract: In local traffic vehicles electrical equipment to be cooled by forced air is mounted in separate housings connected into a group of segmented housings by a reinforced gasket inserted between juxtaposed ends of adjacent ones of the housings. The reinforced gasket includes a rigid, open frame having a configuration that matches the shape of the openings of the housings on each side. Elastomeric sealing rings are attached airtight to extend from opposite faces of the rigid frame and to press against the ends of the housings on each side of the frame. The elastomeric surfaces are sufficiently deformed to provide a good, airtight seal between each successive pair of housings and yet the reinforced gasket can be slid out from between the housings and replaced without requiring that the housings on each side be disturbed. This permits any housing in the group to be removed for service of the device therein without disturbing any of the other housings.

Abstract: A choke for use with alternating current has a ventilated housing with a perforate inner wall and an imperforate outer wall to which the choke is connected vibration-elastically. The space between the inner wall and the jacket is filled with a sound-absorbing material.