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Dry Cell Batteries — Schuete 459
the connection-s between them may work loose from the .vibration of the truck.
Standardization of Sizes
Since 1921, the dry battery manufacturers, through the Department of Commerce, carried out a program of simplification and standardization of battery sizes. Practically all of the larger battery makers are acquainted with these standards, and they will be pleased to help motion picture engineers in their dry battery problems in the hope that whatever dry batteries are developed for this new art, will fit in with simple manufacture and a simple standardization.
If new batteries are needed, the battery manufactures will make them. They only ask an opportunity of being allowed to give their suggestions as to the best types that will supply the proper power at the least cost and with the least trouble of obtaining replacements.
DISCUSSION
Mr. Crabtree : If the battery is stored for two weeks at a low temperature (around zero Fahrenheit) are its properties permanently afPected?
Mr. Schulte : At low temperatures the electrical resistance of a dry cell increases, but on being brought back to room temperature, the dry cell will return to its normal condition. This means that the short circuit amperage or flash of a battery will be low at low temperature.
Mr. Taylor: If you know that the battery is not to be used intermittently, so that the recuperation is not of interest, can it be designed differently, so that more will be obtained from it ? How are the shelf -life and recuperation and the output? If you wish to favor one at the expense of the others, can anything be done this way with any real gain? Also, with reference to the high voltage batteries will they have a better shelf life than the standard battery, and, also, what voltages are standard or contemplated for the high voltage batteries? I have seen a 108 volt battery not in line with the units.
Mr. Schulte : If a battery is not to be used intermittently it is possible to change the composition of the mix so that it will give