Home-made Electrical ApparatusMorgan, Alfred Powell
Science
Home-made Electrical Apparatus
Morgan, Alfred Powell
Electric apparatus and appliances -- Amateurs' manuals
A very pretty effect can be produced by arranging the tinfoil in the
form of a pattern or design as for example that illustrated in Figure
19. A strip of glass about the same size as that used for the lightning
board may be employed. The glass is coated with shellac and as soon as
it becomes sticky, small rectangular pieces of tinfoil arranged in a
zig-zag pattern and having small spaces between them, are stuck in
position. The end pieces are made larger than the other strips so as to
afford means for connecting the wires. The strip should then be
insulated and mounted by cementing it in a slot in the cork of a glass
bottle.
[Illustration: FIG. 19.—A very pretty effect can be produced by
arranging small tinfoil strips on the Glass in a Pattern. Each strip
should be separated from the other just far enough for a Spark to pass.]
The apparatus shown in Figure 20 is made according to the same plan but
the glass in this case is in the form of a square instead of a strip.
The tinfoil strips are arranged in the form of a seven pointed star or
any other pattern which may be desirable. The two large strips A and B
are the ones to which the wires should be connected.
*The Electric Parasol* is illustrated in Figure 21. It is made by
pasting some narrow strips of tissue paper, about three-sixteenths of an
inch wide and three or four inches long, to a small cork which has
previously been covered with tinfoil. The strips can be made most easily
by cutting a small sheet of tissue paper into strips like the teeth of a
comb as shown in the upper right hand corner of Figure 21. The tinfoil
covered cork should be mounted on the upper end of a stiff copper or
brass wire supported in a bottle.
If this wire is then connected to one of the discharge rods on the
static machine and the hand held to the other, the paper strips will
spread out like a parasol or umbrella, as soon as the machine is set in
operation.
[Illustration: FIG. 20.—A very pretty design made by arranging the
Strips in the form of a Seven-pointed Star. Flowers, initials or almost
any pattern may be made in the same way.]
A novel experiment somewhat similar in principle to the "electric
parasol" is that shown in Figure 22.
Three small paper birds about the size of that shown at the right hand
side of the illustration should be cut out of tissue paper and each one
attached to a piece of cotton thread about six inches long. The threads
are then tied to one end of a T-shaped frame bent out of copper wire and
supported on a bottle.
If the wire frame is then connected to one of the discharge rods and the
hand held to the other while the machine is set in operation, the birds
will rise in the air and fly around as far as the threads will let them.
Public-domain text, read in full here on John Shaqi.
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