Abstract: In a color separation prism system for a color television camera, a bias light source is located at a position substantially displaced from one or the other of the two intersections of (i) a plane including the optical axis of the taking lens of the camera and perpendicular to the plane including the optical axes of the three color light beams incident to the pick up tubes and (ii) the two parallel edges of a prism block formed by the entrance face thereof to which the light from the taking lens of the camera is incident and the upper and lower parallel faces of the prism block parallel to the plane including the optical axes of the three color light beams. The color separation prism system is particularly suitable for use in a system in which the refractive index of the glass constituting the prism blocks is as high as 1.7.

Abstract: Means is provided for selectively inserting any one of one or more glass elements having parallel flat sides between the color separating prism and the objective of a television camera so as to adjust the glass length of the optical system to meet the requirements of the particular image pick-up tube concerned.

Abstract: A swash-plate type compressor for air conditioning of vehicles. A pair of cylinder blocks are rigidly combined in coaxial alignment. The combined cylinder blocks form three bores. A piston is slidably disposed in each bore and the motion of each piston is actuated by a swash-plate mechanism mounted on a drive shaft which is connected to a driving source. A lubrication reservoir is formed in a sector space sandwiched by a pair of said bores and an inside wall of said combined cylinder block. A geometrical longitudinal center line of said combined cylinder block is biased downward from a geometrical center line of said drive shaft.