Show incandescent LAMPS how the burned out ont filament may be B replaced and renewed it has been generally supposed to be it a fruitless task to attempt the renewal of a burnt out incandescent electric lamp although there appears to be some economic fallacy involved in the destruction of what Is except in one small if important particular a perfect piece of apparatus it Is not intended as a rule to give in this column descriptions script ions of american devices or achievements drawn from foreign publications licati ons this subject has however been taken up by the english journal industries and iron and although it states that an american process for renewing these lamps after the filament has been broken has been developed it does not give the name of inventors nor state that the process hag haa come into anything like general application its description of the operation Is therefore fa re given tor for what it is worth it states that a commercial success has haa been made of a process for renew renewing in g burned out lamps which renders possible the use of the old bulb at a very slight expense by the new method the collar or bare end of the lamp is not ot disturbed the old filament being removed and the new one placed through IL a small hole in the lamp bulb made by removing maving re the tip the small hole is subsequently closed exactly in the same manner as in the case of the new lamp leaving nothing to indicate in the finished repaired lamp that it had ever been opened it is atz sued eted that some lamps have been repaired by this method the filament being inserted through the small hole referred to by a skilful twist of the hand and secured in position by a special carbon paste the black deposit on the inside of the bulb is removed by fitting the lamp to the holder and removing it in a gas furnace while immediately following this operation a small glass tube is fused to the opening made in the bulb through which the lamp is exhausted when this has been done and the last trace of air and gaa absorbed sobbed a blowpipe blow pipe flame is directed upon the throat of the tube which Is melted into the point exactly in every respect a counterpart of the original lamp I 1 |