. Journal of electricity, power, and gas . t and that this key will be used only incases of emergency, when anyone may break the glass frontand obtain the key to open the set. This compartment is tobe made air-tight so that it will be impossible for dust toget inside and hide the key from view. The back of this com- June 18, 1910] JOURNAL OF ELECTRICITY, POWER AND GAS 573 partment is to be painted white so as to make tlie keymore noticeable. It is also intended tliat the foreman or man in chargeof the mine shall be provided with an extra Icey to enable himto open the box under ordinary conditi
. Journal of electricity, power, and gas . t and that this key will be used only incases of emergency, when anyone may break the glass frontand obtain the key to open the set. This compartment is tobe made air-tight so that it will be impossible for dust toget inside and hide the key from view. The back of this com- June 18, 1910] JOURNAL OF ELECTRICITY, POWER AND GAS 573 partment is to be painted white so as to make tlie keymore noticeable. It is also intended tliat the foreman or man in chargeof the mine shall be provided with an extra Icey to enable himto open the box under ordinary conditions in the mine whenit is desirable to operate the generator for fire or emergencycall drill. The same precaution against water following the linewires into the case of the signaling set is taken as in theWestern Electric new design of mine telephone. The curvedinlet at the top provides an entrance which removes the pos-sibility of water flowing along the line wires and into the set. The emergency signal bell used with,the generators con-. Signalling Apparatus for Mines. sists of a non-sparking bell provided with two eight-inch steelgongs mounted upon a wooden or steel backboard and havinga protesting canopy. The gongs are not galvanized and have anespecially loud and clear tone. All parts, including the wind-ings, are specially treated to stand conditions of mining at-mosphere. The signal system above described may be used withor independent of a telephone system. For mine telephoneservice the Western Electric Company has new designs ofmetal and wood sets and also a new design of an inter-com-municating metal mine set, all of which are fully up to thestandard of the telephone apparatus furnished to the tele-phone companies in the Bell system, who are its principalcustomers. WESTINGHOUSE REPORT TO STOCKHOLDERS. The annual meeting of the stockholders of the Westing-house Machine Company for the election of directors andfor the transaction of such other business as may properly b
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Keywords: ., bookcentury1800, bookdecade1890, bookidjo, booksubjectelectricity
