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1.
2.
3.
4
5.
6
7
R.
9.
11),
11.
12,
13
14.
END VIEW OF
REPRODUCER.
Main wheel.
Ratchet and spring.
Main arbor or staff.
Center wheel.
Third pinion.
Third wheel.
Third wheel arbor or staff.
Center pinion.
Screw.
Wooden block.
Record plate or bottom of a
pie tin.
Wooden block supporting
record plate.
Center arbor or staff.
Brass frame or plate of clock
movement.
15—18. Small wheels forming ends
of governor.
HOW TO MAKE A PHONOGRAPH 597
KEY TO NUMBERED PARTS
16
17-
18
19
19
20
21
22
23
24
25
26
Burrs on 19 to Icontrol governor.
-17. Small springswith weights
to form sides of governor.
See 15.
Fourth wheel arbor or staff.
Fourth pinion.
Fourth wheel.
Wooden block acting as brake
on fourth wheel.
Tightly connected pivot on
arm supporting 23.
Brake lever.
Winding key.
Nut and bolt holding reproducer
or sound box together
(three of these).
End of scarf pin.
To the third elbow I fastened the tin
megaphone.
Then I attached this rig to an upright
which I nailed to the soap box, in such
a way that it would be free to swing,
and balanced a little to the left, so its
tendencv would be to swing that way.
The adjustment of this somewhat delicate
balance was the hardest part of the
entire job.
My phonograph was now complete
and I set a record on it. To my surprise,
SIDE VIEW OP
REPRODUCER.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
9
•10
II
-12
-13
-14
-15
-18
-19
-20
-21
-22
-23
•36
Scarf pin.
Solder patch holding scarf pin
to telephone receiver diaphragm.
Diaphragm.
One of two iroD washers.
Piece of wire supporting scarf
pin.
Loop in scarf pin, around wire
support.
Small screw to hold needle.
Needle.
Shell of electric light socket.
End of iron pipe elbow, fitted
into 35.
Wooden block to hold scarf
pip and needle.
it really played! Not exquisitely, perhaps—let
us rather say with surprising
ability and persistence.
Had I been obliged to purchase the
material out of which this home-made
and homely machine is made, it would
have cost me from one dollar to two
dollars, the greatest expense being for
the clock works. I have an idea, however,
that the resources of nearly any
attic or basement storeroom contain all
the requisite materials.