engagement with the end flange 44 of the switch outer sleeve 40 to progressively readjust the outer sleeve 40 to a proper position in the structure depicted at fig4 5 the switch 32 mounted in the end of the slave cylinder bore 28 also comprises an inner sleeve 38 provided at one end with an electrically conductive bridging contact ring 60 and an outer sleeve 40 provided with a pair of spring contacts 62 and 64 for closing a circuit through the wires 66 and 68 the outer sleeve 40 is frictionally held within the bore 28 as a result of being provided at its end in which telescopes the inner sleeve 38 with an annular flange 74 having an outer edge 76 in frictional engagement with the internal surface of the cylinder bore 28 the switch holding ring 50 has an inwardly directed radial flange 78 frictionally engaged at its edge 80 with the peripheral surface of the outer sleeve 40 the inner sleeve 38 is attached at one end to the piston 30 by any convenient means such as a split ring 82 disposed in a corresponding inner groove in a cylindrical recess 84 formed at the end of the piston 30 and in which is engaged the.