Abstract: A frame structure for an electronic or electrical cabinet is disclosed including structural members which comprise a substantially closed square shaped tube wherein two walls of the tube substantially adjacently meet but turn outwardly into two flanges. The structural members may be attached together to form corner structures for a frame by either welding or modular means. In a modular arrangement, a block-shaped corner member having block-shaped protrusions is used to hold three structural members in a rigid corner arrangement. In a welded arrangement, three structural members are intersectingly connected with the flanges formed to mutually abut such that welding the flanges of one structural member to one of the flanges of each of the other structural members is all that is necessary to hold the three structural members in a rigid corner arrangement.

Abstract: A locking screw is disclosed having a shank and a frustoconical head with a cavity therein and a knurled annular end surface portion encircling the cavity. The locking screw is disposed within the arm of a joint connecting member which arm is inserted in a tubular structural member. The screw is turned out from the arm into engagement with the structural member holding the joint and structural member securely together.

Abstract: A spin-on type oil filter with an improvement to the normal filter body that allows non-tool assisted, easy hand installation and removal of the filter unit in open and close tolerance situations.