Storage Batteries: Their Theory, Construction and Use (Google eBook)

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Bubier publishing Company, 1911 - Storage batteries - 166 pages
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Page 156 - ... ampere-hours. This battery furnishes current for the "disconnect" signals on the operator's cords, and for the relays which cut out the subscriber's lamp signal when the operator answers his call, by plugging into the jack corresponding to the lamp signal. Half the drop in potential of the 8-volt battery is in the 4volt lamp, and the other half in the cut-out relay. This battery is in duplicate, so that one can be charged while the other is being discharged. This avoids danger of burning out...
Page 156 - ... cells, two in series, two in multiple ; the other of two cells. The two extra cells are needed on one of the batteries to supply current for the operator's transmitters. The latter is arranged to furnish a current of four volts or two volts as desired. The 4-volt battery also furnishes all current for the lamp signals which light when a subscriber takes his telephone off the hook. This lamp is put out when the operator answers the call. This battery also is made in duplicate, one being charged...
Page 156 - ... transmitters. The latter is arranged to furnish a current of four volts or two volts as desired. The 4-volt battery also furnishes all current for the lamp signals which light when a subscriber takes his telephone off the hook. This lamp is put out when the operator answers the call. This battery also is made in duplicate, one being charged while the other is discharged, to avoid burning out the lamp from the higher voltage during charge. Storage Batteries for Train Illumination. When cars are...
Page 155 - ... down, a rheostat is furnished, so that the batteries of lower voltage can be charged from batteries or motor-generators of higher voltage. All machines are protected by automatic cutouts. The 20-volt battery consists of ten " Chloride Accumulators " having a capacity of about 1,000 ampere-hours, which furnish all the current needed by the subscribers for talking and for calling up the central office. The 8-volt batteries, in duplicate, consist of four cells each having a capacity of 2,400 ampere-hours....
Page 123 - ... thin layers of pure metallic nickel in the form of leaves or flakes. The pure nickel flake that is used is manufactured by a special electrochemical process. Each negative plate comprises 24 flat rectangular pockets supported in three horizontal rows in nickelplated steel grids, as shown in Fig. 207. The pockets are made of thin nickel-plated steel, perforated with fine holes, each pocket being filled with an oxide of iron very similar to what is called iron rust. In the construction of the negative...
Page 121 - The electrolyte consists of potassium hydrate (21 per cent solution) to which has been added a small amount of lithium hydrate. The...
Page 128 - This process of self-forming continues over a period of from one to three months of regular service, depending on the conditions; and it is partly to assist in this forming-up that overcharges must lie given at intervals, as recommended under "Charging.
Page 128 - ... user, as a matter of ultimate economy, to follow closely the instructions as to overcharging. A valuable feature of the Edison Storage Battery is that it always has a reserve capacity, which may be utilized when necessary by extending the length of charge. The highest practical limit of output will be reached when a battery is charged ten hours at the normal rate ; and its value will be, for a fully formed battery, perhaps thirty per cent more than the rated output.
Page 167 - THE LIST INCLUDES HOW TO MAKE ALL KINDS OF ELECTRICAL APPARATUS BOTH FOR PLEASURE AND PROFIT. A FEW SELECTED TITLES FROM A LIST OF OVER 150 ARE GIVEN BELOW ABC of Wireless Telegraphy Trevert...
Page 124 - The outer surfaces of the outside plates are insulated from the retaining can by hard rubber sheets. Specially designed hard rubber pieces are fixed between the can and the side and bottom edges of the plates ; and these, together with hard rubber rods inserted between the plates, maintain correct spacing of the plates at all points and insure permanent insulation.

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