The Technical World Magazine, Volume 20Technical World Company, 1912 |
From inside the book
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Page 192
... devices which control the cut - off , with the result that the valve is closed and the supply of gas shut off . It may readily be seen that such a device will be a great saver of both lives and property . In many of our large con ...
... devices which control the cut - off , with the result that the valve is closed and the supply of gas shut off . It may readily be seen that such a device will be a great saver of both lives and property . In many of our large con ...
Page 280
... device that will sound the alarm . They know that it is out of the question to attempt an entrance by smashing the ... device that criminals have used is threshed out . Then some device is found to go the criminals one better and beat ...
... device that will sound the alarm . They know that it is out of the question to attempt an entrance by smashing the ... device that criminals have used is threshed out . Then some device is found to go the criminals one better and beat ...
Page 282
... DEVICE SUPPLANT THE. that open the circuit , sounding the alarm . if the door or window they protect is opened . There is another device called an " electric floor alarm matting " . Laid in strips about the house it too awaits the ...
... DEVICE SUPPLANT THE. that open the circuit , sounding the alarm . if the door or window they protect is opened . There is another device called an " electric floor alarm matting " . Laid in strips about the house it too awaits the ...
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