Brake cable switch means

Apparatus for indicating cable tension, comprising

• (a) a generally rectangular housing containing an hermetically sealed chamber and including bottom, top, side and end walls, said top wall being flexible and having, in a direction generally longitudinally along the housing, a convex external surface;
• (b) means normally biasing the central portion of said top wall away from said bottom wall;
• (c) a pair of switch contacts mounted in said chamber for operation between a normal first electrical condition and a second electrical condition;
• and
• (d) fastening means arranged at opposite ends of said housing for attaching the housing, when the top wall surface thereof is adjacent a cable in the untensioned condition, to the cable and for deforming portions of the cable on opposite sides of the apex of the top wall convex portion toward the end portions of the external top wall surface, respectively, whereby when the cable is subsequently tensioned at or beyond a predetermined value relative to said biasing means, the central portion of the housing top wall is deformed toward the bottom wall to operate said switch contacts to their second electrical condition.