Abstract: An asymmetrical linear lens directing light at a limited solid angle includes a first solid profile section being a right trapezoid having a short and longer base side and two side legs. A second solid profile section is a non-right trapezoid having a short and longer base side and two side legs. The longer base side of the first solid profile section and the shorter base side of the second solid profile section coincide. One of the two side legs of the first solid profile section and one of the two side legs of the second solid profile section lie on a straight line enclosing a first angle with the longer base side of the second solid profile section. The other side leg of the second solid profile section is angled outward in relation to the other side leg of the first solid profile section by a second angle.

Abstract: An electric socket for a mains plug with two contact pins includes a base with a front face having two holes with two contacts arranged behind the holes for electrical contacting a contact pin inserted through. A collar is mounted on the base to be movable from a rear end position into a front end position where the collar protrudes further forwards beyond the front face of the base than in the rear end position and surrounds the front face of the base. An extending mechanism acts at least in the rear end position of the collar and engages between the front face and the contacts in the path of motion of at least one of the two contact pins and is designed to extend the collar out of the rear end position into the front end position by means of the at least one inserted contact pin.

Abstract: An asymmetrical linear lens directing light at a limited solid angle includes a first solid profile section being a right trapezoid having a short and longer base side and two side legs. A second solid profile section is a non-right trapezoid having a short and longer base side and two side legs. The longer base side of the first solid profile section and the shorter base side of the second solid profile section coincide. One of the two side legs of the first solid profile section and one of the two side legs of the second solid profile section lie on a straight line enclosing a first angle with the longer base side of the second solid profile section. The other side leg of the second solid profile section is angled outward in relation to the other side leg of the first solid profile section by a second angle.

Abstract: A luminaire arrangement for providing lighting in or near buildings. The luminaire arrangement may contain one or more of the following components: (i) at least one portable luminaire, which has a body and a lamp arrangement, (ii) at least one energy store, which is connected to the luminaire, is rechargeable, and is designed to supply electrical power to the lamp arrangement of the luminaire; and (iii) at least one charging device, which is designed to recharge the energy store. The energy store is attachable by means of an interface arrangement to the charging device in order to at least one of recharge the energy store and supply power to the lamp arrangement. The energy store is separable from the charging device in order to take the luminaire as necessary to any target location to be lit.