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Index
HOW TO INSTALL Electric Bells, Annunciators, and Alarms.
PREFACE
CONTENTS
LIST OF ILLUSTRATIONS
INTRODUCTION
CHAPTER I The Battery
The Battery Cell.
The Dry Cell.
The Gravity Daniell Cell.
E. M. F.
Resistance of a Cell.
Grouping of Cells.
CHAPTER II Bells and Pushes
Electric Bells.
The Single-stroke Bell.
The Shunt Bell.
The Differential Bell.
Continuous-ring Bell.
Waterproof Bells.
Forms of Bell Gongs.
The Buzzer.
Operating Bells at a Distance.
Reducing Resistance of a Bell.
The Push Button.
Indicating Push Button.
CHAPTER III Wiring, Circuits and Troubles
The Wire.
Joints.
Running the Wires.
Combinations of Bells and Pushes.
Faults in Bells.
Faults in Line.
CHAPTER IV Alarms
Fire Alarms.
Water Level Alarms.
Burglar Alarms.
Door Trip Alarm.
Miscellaneous Alarms.
CHAPTER V Annunciators
The Annunciator.
Wiring up an Annunciator.
CHAPTER VI Annunciators and Alarms
Three Wire Return Call System.
Installing Elevator Annunciators.
Burglar Alarm Annunciators.
Clock Alarm Circuit.
Bells for High Voltages.
Bell-ringing Transformers.
Combination Circuits.
Fire Alarm Circuits.
Interior Fire Alarm System.
Fire Alarm System for Considerable Areas.
LEARN TO DO THINGS
Model Library Series OF COPYRIGHTED BOOKS
Dubelle’s Famous Formulas.
A PRACTICAL HANDBOOK ON THE Distillation of Alcohol FROM FARM PRODUCTS AND DE-NATURING ALCOHOL.
Transcriber’s Notes
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