THE BATTERY STOPPERS

Radio Record, Volume I, Issue 52, 13 July 1928, Page 15

THE BATTERY STOPPERS

MUST HAVE A HOLE. Amateurs generally fail to vealise the importance of the wet battery stopper to the well-being of the haitery, and the foss of such an article usnally- occasions little regret on account of the fact that it is replaced forthwith by a cork of similar dimensions. However, a good accumulator stopper will be found to have a tiny hole or yent running through it; the object of which is to equalise the atmospheric pressure within and without the accumulator, and also to provide for the escape of any smali traces of gases which may be produced while the accumulator is in use. Vurthermore, the small hole in the accummulator stopper allows the escape of gases when the accumulator is being charged, but, at the same .time, it prevents the escape of acid spray. It is, however, always better to unscrew the cap and let it rest on top of the hole while charging is in progress, to relieve the pressure of gas. If, therefore, an accumulator stopper i¢ lost and a cork is used to relace it, the cork shonld have a small ole drilled through it. A hole of this type can readily he produced ir the cork by burning throrgh it witl }a ted-hot knitting-needile.