| Show HOW TO MAKE A SOUND intensifier cj C A ed E F L the assembled intensifier showing parts can be made from discarded reflector of automobile light the pork packer Is said to make us use of every part of a hog except the squeal and tho the curl in his tall some of the ra radio tile experimenters experiment ers make use of the squeal tho the following describes a useful piece of apparatus for the radio nina aina tour leur constructed nt at a low cost all vie the material can ile bo readily procured for practically nothing at somo soine motor garage at n friends garage find in tile junk box was disc a discarded front light reflect ref leef from an automobile nn an old aluminum from it a broken rubber bull front from a motor horn and some motorcycle spokes nipples it ip ples attached these were obtained free of cost and brought home hoine the first procedure was to clean oft off nil all greaso grease from the reflector the flat dango nt at the broad on end of tile the reflector was next nest cut off and the surface mada smooth tills this left tile the two bonds beads on oil tile idge dge as the finish the hole in ili tile the con kr of the reflector through which tile locket of the lamp passed had a small lat disk of copper soldered in the re DISC SOLDERED SOL DEREDON ON 0 31 jt HOLES 5 FOR SPOKE transforming the reflector hector was next polls lied inside and silver plated and tile the outside was enameled black four holes were drilled equidistant through the lie reflector edge into which holes liolis the spokes fitted this finished the reflector see biag diagram rall N no 0 o 1 the was taken apart lind tho the aluminum shell cleaned und ana then the lug was cut off the was next removed and ill alio liole hole from shiell it was taken was countersunk inside and outside mid and in ili tills this liole hole a plug of toft soft aluminum was fitted and riveted over oer so as to flit up ill the hole all roughness both outside find and inside wits was re 10 macd with a lie file and scraper scrap rr A bio block k of wood was then turned on the lathe to lit fit into the broad end of casing the outside of the was turned smooth and it a hole bored in ili the end of the ill cone tills this turned out ont leaving a thin tube projecting four equidistant holes were bored near the broad end of tho the cone on the flat surface of the into which the spoke nipples fitted and wore were countersunk on the inaldo to suit tho the heads of tile spoke nipples nipple s ind and these were lied filed lat flat so that whon when in ili place the surface inside the commute tor shell would be smooth four edul distant holes were bored one of an inch from the flat edge of the shell to ta take he four stil small till screws tin and countersunk on the outside the nipples were removed from the old spokes find and were cleaned and polished the spokes were cut olt off e exactly 21 inches long from the lie threaded end a 0 small email washer was fitted on tile the other end ind and the end of spoke riveted over arid tile the two sweated together neatly they were then copper plated and silvered like the reflector four spokes wore were required see angram no 3 next n strip of stout sheet bratis brass was em cut as ag shown and holes were bored for screws A large liole hole ans made to take B ii all 4 d A ma 44 0 0 8 A 0 A 11 Z del Z V tho the projection of tile reflector ic tu to which it aps was iol soldered bold cred dered when assembled soa see diagram no 4 tho the old horn honi bull bulb was cleaned well with gasoline find and was loft left ready to cut to the proper length when the completo complete apparatus was ready to ai emble see diagram no 5 for sketch of apparatus when assembled the 1 setters etters in thu the various porta A serous screws holding wooden block and shell together 11 nipples ot of spokes holding com imitator shell central with jtb reflect reflector ter C spokes passing through bellet tor for nud find shell D 1 earpiece ar ploce of telephone receiver K H ploce of rubber bull bulb ns as souni sound deflector conveyor con venor to reflector rel lector r F G wooden block fitted into com shell in ili which telephone Is fitted 11 adjusting screw to press re rc celver against rubber washer J holes for waves wages from telephone belej receiver rec elor 1 K holding down clip for front of reflector L brass standard screwed to base and soldered to reflector at rubber ring fiade from inner tube of motor tire the arrangement for using tile old aluminum shell for holding tile the telephone receiver call also be applied in ili i n different manner it if tle the wooden block Is turned flat fiat it could be screwed to the lie top of the radio cabinet and a largo large horn fitted on the mihall end of the shell as amplifier if n number of holes wore were drilled in ili the side of the cone and the holes tapped to take inch brass pipe it could then bo be fitted with rubber tubes which could lie bo fitted with ear pieces of glass tubing and used by b it number 0 persons part of the brass hi ass knob taken fron from I 1 a bed or a door could bo be used instead of rubber lubber procure it telephone recover receiver tho the di fi of the cover coor of which Is less than that of the inside of a cou comma tutor shell which Is two and thirteen sixteenths indies the depth front from the face of tile earpiece earple cai piece ce to the back of the telephone does not matter much ns as it a wooden case niest now be miudo to fit inside of the shell in fit tills this wooden case part Is turned out to hold the rest of tile the receiver A ru ni 1 t ber bei ring ling Is put inside the shell and the earpiece earple cai piece ce rests against it tile wooden case Is then put in place and with the it Is field by four an adjusting screw at the end of the wood on en case aie presses pi esses tile tho eirp loco tight ly IY against tit alio rubber ring and makes tin an airtight joint the connections fan can be brought out through the alie wooden rise case of flexible cable or otherwise others lac to suit the maker diagrams of each part tire are shown shon dp well all as of tho the as Seni bled instrument when lill all parts fire ready proceed to afable ns as fol lows los take shell reflector find four pokes spokes pass a n spoke from the outside of the reflector into a hole in tile the shell ind and screw sarc on the nipple do the sime same with alth the other spokes the shell Is then held in ili tile the center of the reflector NOVI jtb tile the nar row 10 end pointing towards the polished face of the reflector rel lector tighten up the nipples nipple evenly until the shell Is rigid with alth no or ir shako shake the piece of rubber horn born bulb Is cut so that there Is it between it and the face of the reflector aben hen slipped over the end of tho shell opening the brass strip Is slipped on the outside and fastened to a nent neat wooden base the edge of the rell reflector oct rests on the wooden base and is 13 held do down wit tight by 1 a screw and clip alen wl en the reflector Is fixed on the base the brass strip can be soldered to the be back of the reflector when the lie telephones are inserted the block placed in ili position screwed tight and the back adjusting screw tl lienol up nil all la Is then complete to connect c i hect up to the set ret t science and invention and cadlo news new |
