Abstract: Steering column switches for motor vehicles having a switch housing and an operating lever are known, which operating lever is swivellably mounted about an axis in the switch housing and which comprises a control grip rotatable about an axis of rotation extending in the longitudinal direction of the operating lever and which control grip is movable between at least two operating positions, and a switching rod at least substantially aligned in the longitudinal direction of the operating lever and substantially rotatable about the longitudinal axis via the control grip and via which switching rod at least one electric contact accommodated in the switch housing is movable. In most cases the motorcar manufacturers desire particular angles of rotation between the individual operating positions of the control grip. These angles of rotation are not always favorable for operating the electric contact.

Abstract: In a cooling body (1) which has, in the semiconductor supporting surfaces illustrated, cooling slits (3) which are connected via two connecting channels (4) to a collecting channel (7) for the supply of a cooling liquid, for example oil, cooling elements (9) are provided at the edge to improve the cooling effect. These cooling elements can be designed as cooling ribs, cooling fingers or cooling needles. The cooling liquid flows out of the cooling slits (3) at an angle (.alpha.) of preferably 60.degree. to 70.degree., so that it flows over a relatively long distance along the outer edge of the cooling body (1) and between the cooling elements (9) of the latter and thereby dissipates heat from the cooling body and from the cooling elements. The cooling slits can extend radially, widening outwards, or in serpentine or involute form or spirally and can have a rectangular or triangular or semi-circular or trapezoidal cross-section.