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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 cover

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 3: LIST OF ILLUSTRATIONS
By Norman H. Schneider
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About This Book

A practical manual explains the principles, components, and installation of electric bell, annunciator, and alarm systems, covering battery types and connections, bell mechanisms (single-stroke, shunt, continuous, waterproof, buzzers), pushes and relays, wiring practices and fault-finding, and methods for door, elevator, and annunciator installations. It also details thermostats and water-level indicators, burglar and fire alarm circuits, bell-ringing transformers, and single- and multi-wire return call systems, illustrated with wiring diagrams and component drawings to guide setup, troubleshooting, and combinations of bells, door openers, and interphone circuits.

LIST OF ILLUSTRATIONS

Fig.   Page
1 Electric bell, push, and battery x
2 Leclanche cell 1
3 Dry cell 4
4 Gravity cell 5
5 Vibrating bell 10
6 Single stroke bell 10
7 Shunt or short circuit bell 10
8 Continuous ring bell 13
9 Waterproof bell 14
10 Dome gong 15
11 Tea gong 15
12 Cow gong 15
13 Sleigh bell gong 15
14 Spiral gong 15
15 Relay and circuit 16
16 Door push 19
17 Pear push 19
18 Door push 19
19 Wall push 19
20 Floor push 20
21 Door pull attachment 22
22 Wire joint first operation 25
23 Wire joint second operation 25
24 Wire joint insulating 25
25 Section of house showing wiring 29
26 Bell with ground return 30
27 Pushes in multiple 31
28 Bells in series 31
29 Bells in multiple 31
30 Two bells and two pushes 32
31 Two bells and two pushes 32
32 Two bells, two pushes and one battery 33
33 Double contact push 33
34 Grounded bell 34
35 Tongue test of wiring 38
36 Knife test of wiring 38
37 Knife test of wiring 39
38 Metallic thermostat 40
39 Mercury thermostat 41
40 Mercury thermostat circuit 42
41 Water level alarm 44
42 Lever water level alarm 45
43 High or low water level alarm 45
44 Window spring for burglar alarm 47
45 Burglar alarm—closed circuit 47
46 Special bell connection for burglar alarm 48
47 Special bell connection for burglar alarm 49
48 Burglar alarm and relay 50
49 Window-shade contact spring 51
50 House wired for burglar alarm 52
51 Door trip alarm 53
52 Annunciator drop 55
53 Needle drop 56
54 Needle drop indicating 56
55 Pendulum drop 57
56 Annunciator drop circuit 58
57 Simple annunciator circuit 59
58 Annunciator and fire call circuit 60
59 Single-wire room and fire call 61
60 Three-wire return call circuit 65
61 Elevator bells and annunciator circuit 67
62 Burglar alarm annunciator circuit 69
63 Clock alarm circuit 71
64 Bell-ringing transformer 73
65 Bell-ringing transformer with three secondary voltages 73
66 Western Electric interphone system 75
67 Western Electric interphone system for more extensive service 77
68 Fire alarm circuit 79
69 Interior fire alarm circuit 81
70 Fire alarm circuit for considerable areas 82