Show back panel swi switch itch made from discarded rheostat by HAROLD do bod need it good back panel switch here Is ono one that can bo be made from an old rheostat and will prove ns as good tig as any on tile tho market tho the resistance wire should bo be removed and holes of the correct size drilled through the rheostat form at regular intervals for tho the switch points these switch points should be of the kind that are almost flush with the surface the usual rheostat shaft Is not long enough so a bar of the same diameter and three inches long should be obtained tile the regular rheostat contact lever Is slipped on the shaft to about the center and fastened by means of the set screw the shaft should now be inserted so sa that the lever Is on the same side as the switch points A spring Is placed on the end of the shaft protruding on the opposite side and compressed by the shaft collar ns as shown in uie the sketch this collar Is secured by tightening tile the set screw L back of panel switch in such a position that the spring ex erts sufficient pressure to keep the lever snugly against the switch points tile the switch Is secured to the panel by means of tile the two screws that were originally employed nil as the rheostat binding posts A knob end cud pointer or a dial danli may y be used as desired this switch it if carefully constructed will be smooth running and will eliminate switch points on the panel r dy wenns of ropo rope and hook inal Is picked up by british airplanes during foht in |