ORNAMENTAL ARC LAMP FOR INCANDESCENT CIRCUITS.
ARC LAMP FOR INCANDESCENT CIRCUITS.
From 600 to 3,000 Candle Power.
Nearly all the large retail and wholesale establishments of the country have adopted electricity for lighting purposes, and the large majority of them operate their own plants. In all such places there is an occasional demand for arc lights, but the great danger to life and liability of fire in using the " series arc system " has caused many to hesitate before adopting it. To overcome this we have perfected the system of arc lighting from the incandescent current, which renders possible for the first time a prefect electric lighting system, the arc and incandescent lamps on one circuit, operated by the same dynamo, measured when desirable through one meter, and both governed by the same rules of safety.
Requiring but 45 volts, it will burn in series in any number, according to the voltage of the circuit; that is, i on a 5O-volt circuit; 2 on 100 to 125 volts ; 4 on 200 to 220, and 10 on 500 volts.
In all cases a suitable resistance is furnished with each lamp, or pair of lamps, to compensate for the difference in voltage above that actually required for the lamps.
The light is absolutely steady and does not interfere in the least with the incandescent lamps.
The light is a beautiful white, brilliant arc, without flicker or noise.
The incandescent lamp of small candle-power is admitted to be the best artificial illuminant known.
The Arc lamp is simply an immense incandescent lamp, as it were — the light of many small lamps concentrated in one.
To illustrate the value of a combined arc and incandescent system in the lighting of such places as depots, a low-tension, high-efficiency dynamo is installed. The offices and waiting-rooms are lighted with incandescent lamps, while the entrances and large areas may be brilliantly illuminated by use of the arc lamps burning on the same circuit.
The same principle applies to factories, warehouses, large stores, docks, machine-shops, foundries, public halls, theatres, and so on.
The efficiency of the Mather incandescent dynamo is so much higher than that of any series arc dynamo that arc lights operated from the Mather dynamo require less power than if run from any of the various types of series arc dynamos.
DeL. Sheplie & Co., Boston, Mass.