A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 21
rom the alarm when sodesired, as well as to per-mit windows to be partlyraised for purposes of ven-tilation without soundingthe alarm. A clock is fre-quently connected with thealarm for the purpose ofautomatically disconnect-ing any portion of thehouse at or for certain in-tervals of time. Fig. 6… … Fig. 6. Burglar-AlarmAnnunciator. Ala. 12 [Ala. connected by suitable circuits with alarmsplaced in a centrally located station. In a system of central-station burglar-alarms, anumber of houses, factories, banks, etc., are allconnected telegraphically with the nearest policestation, or other…
Electricity · Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
