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Old Telephones
Jasper County Fair, July 26 2022
Brian Capouch
medaryville.org/telephones
POTS
Techology Sequence
Local Battery
Common Battery
Touchtones
Cellular Service
Integrated media device (aka "smartphone")
Parts of a Telephone
*
*Local-battery type
A telephone is TWO devices!!
A talk circuit
AKA "bearer"
A signal circuit
The
hookswitch
toggles between the two
Hookswitch DOWN: signal
Hookswitch UP: talk
Talk Circuit
Transmitter
Receiver
Battery for power
Connecting Line
Induction Coil
Provides the "magic sauce"
Direct current
Signal Circuit
Generator (magneto)
Gongs (bells)
Alternating current
It can
SHOCK
you!!
Historical Sequence
One-box wall set
Candlestick
Grab-a-phone
Desk set
Old Telephones
By capouch
Old Telephones
500
capouch
PRO
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capouch