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

CHAPTER IV

Chapter 424 wordsPublic domain

Fire alarms--Thermostats--Metallic thermostats--Mercury thermostat--How to connect thermostats--Water level indicators--Burglar alarms--Open and closed circuit alarms--Window, door and shade springs--Alarm matting--Yale lock alarm--Door trip alarm 40