Abstract: A housing structure, includes a compartment body formed by interconnecting side walls and a door, and hook-shaped hinges for articulating the door to one side wall. The side wall is formed with a groove which extends longitudinally from top to bottom. Each hook-shaped hinge exhibits an angled section and extends through a slot of the door for engagement in the groove, with the angled section of the hinge at least partially overlapping a marginal area adjoining an outer edge of the door.

Abstract: A safety switch assembly as part of a protective screen by which a motor-driven machine is enclosed includes a locking unit for allowing opening of the protective screen for access to the machine only after all moving motor parts are at a standstill, and a plunger which actuates an electric switch for cutting the electric supply to the machine. The plunger is linked to a control member which is moved by the plunger in response to a key insertable into a housing by which the safety switch assembly is fully enclosed. The locking unit includes a locking lever which is actuated by an electromagnetically actuatable locking mechanism to engage and immobilize the control member with the electric switch being actuated by the control member.