making such defeating known to strangers the switch 40 is best shown in the exploded view of fig3 and the assembled view in fig1 and comprises a mounting 60 of plastic which has an upwardly extending axle 62 abutment 64 and stud 66 pivotably mounted on axle 62 is a plate 68 which is held on the axle 62 by c washer 70 standing up from plate 68 is an axle 74 which carries a shim 76 held thereon by c washer 78 a spring 80 extends between stud 66 and a hole in plate 68 to urge the plate carrying shim 76 against notched wheel 82 notched wheel 82 is mounted on shaft 50 which is held by bearing 86 within plastic mounting 60 notched wheel 82 carries a commutator 84 which can rotate in a circle and in one position bridges the contact points 88 and 90 connected to control terminals 46 when wheel 82 is in the correct rotary position commutator 84 shorts contacts 88 and 90 there are sixteen notches in the wheel 82 and each of these notches is mechanically engaged by shim 76 when the wheel is rotated associated with each notch is a hole which can accept.