How to Make A Telegraph

1
How to Make A Telegraph

• Exploring the Magic of Electricity

2
Miscellaneous Parts
Alligator Clips
Pan Head Screws
¼ Hex Bolt
Machine Bolt
Washers
Wood Screws
3
Parts
Enamel Coated Magnet Wire 20 gauge
Bell Wire (solid) 18 gauge
Sheet Metal Strap
4
Framework
Switch Block 2 ½ x 4 ½ x ¾
Sounder Arm 7 ½ x ¾ x 5/8
¼ Dowel Rod
5
Telegraph Frame
3 ¾ x 6 ¾ x ¾
7/8 x 3 1/8 cut out
3 ¾ x 4 ½ x ¾
3 ¾ x 4 ½ x ¾
3 ¾ x ¾ x ¾
¼ Hole
2 ¼ x 2 x ¾
8 - 1 ½ wood screws
3 ¾ x 6 ¾ x ¾
6
6 volt lantern battery
7
Electrical Tape
8
Making Electro Magnet
STEP 1 Put large washer on hex bolt
9
STEP 2 Wrap hex bolt with electrical tape
Leave ½ unwrapped at bottom
10
(No Transcript)
11
STEP 3 Wind magnet wire around bolt
12
(No Transcript)
13
Keep windings neat, tight 5-6 layers of magnet
wire
14
STEP 4 Sandpaper end of magnet wire (sand away
½ enamel)
15
(No Transcript)
16
STEP 5 Screw bolt in top of framework
17
Finished Electro magnet
18
Making Telegraph Switch
19
STEP 1 Cut two pieces of black bell wire,
equal lengths
20
STEP 2 Strip wire ½
21
(No Transcript)
22
STEP 3 Make a hook in wire
23
(No Transcript)
24
STEP 4 Fasten wire and strap metal to wood
25
STEP 5 Screw into place
26
STEP 6 Fasten bell wire at other end of switch
block
27
STEP 7 Screw in place
28
Completed Telegraph Switch
29
Attaching alligator clip
STEP 1 Insert bell wire into alligator clip
30
STEP 2 Wrap bell wire around screw
31
STEP 3 Tighten screw on alligator clip
32
STEP 4 Add alligator clips to both bell wires
33
Attaching Electro Magnet to Telegraph switch
STEP 1 Fasten magnet wire, bell wire to
framework
34
STEP 2 Screw in place
35
STEP 3 Fasten magnet wire, bell wire to
framework
36
Completed wiring to telegraph switch
37
Completed Electro magnet wiring
38
Making Sounder Arm
7 ½ x ¾ x 5/8
39
STEP 1 Screw in bolt
40
STEP 2 Insert sounder arm into framework
41
STEP 3 Insert dowel rod into framework
42
Completed telegraph sounder
43
Place top on telegraph sounder
44
Hinge top to telegraph sounder
Hinge 1 ½ x 1 ½
45
Leave 1/8 gap between electro magnet and bolt
46
Completed Telegraph