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 shows the store to be pro- tected by the company . Bur- glars know it and keep away . They know that beyond the lattice are innumerable hid- den traps . They know that every inch of the walls may be wired , that under - foot ...
... device that shows the store to be pro- tected by the company . Bur- glars know it and keep away . They know that beyond the lattice are innumerable hid- den traps . They know that every inch of the walls may be wired , that under - foot ...
Page 282
... DEVICE SUPPLANT THE REFRIGERATOR ? 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 ...
... DEVICE SUPPLANT THE REFRIGERATOR ? 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 ...
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