How to Install Electric Bells, Annunciators, and Alarms. / Including Batteries, Wires and Wiring, Circuits, Pushes, Bells, Burglar Alarms, High and Low Water Alarms, Fire Alarms, Thermostats, Annunciators, and the Location and Remedying of Troubles

by Norman H. Schneider

Fig. 28

If two bells are to be operated from one push they may be in series ([Fig. 28]), but in this case one of them must be arranged for single stroke. If both were vibrating bells the armature of one would not vibrate in unison with the other armature and the result would be irregular contact breaking and intermittent ringing.

Fig. 29

A preferable connection for two or more bells and one push is [Fig. 29], where the bells are in multiple. This requires more current than the series method.

Fig. 30

Fig. 31