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KF5JRV > TODAY 07.03.19 14:35l 36 Lines 1840 Bytes #999 (0) @ WW
BID : 32323_KF5JRV
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Subj: Today in History - Mar 07
Path: IW8PGT<IR2UBX<SR1BSZ<F1OYP<ON0AR<VE2PKT<N3HYM<N9LCF<NS2B<KF5JRV
Sent: 190307/1231Z 32323@KF5JRV.#NWAR.AR.USA.NA BPQ6.0.18
On this day in 1876, 29-year-old Alexander Graham Bell receives a patent
for his revolutionary new invention–the telephone.
The Scottish-born Bell worked in London with his father, Melville Bell,
who developed Visible Speech, a written system used to teach speaking to
the deaf. In the 1870s, the Bells moved to Boston, Massachusetts, where
the younger Bell found work as a teacher at the Pemberton Avenue School
for the Deaf. He later married one of his students, Mabel Hubbard.
While in Boston, Bell became very interested in the possibility of
transmitting speech over wires. Samuel F.B. Morse’s invention of the
telegraph in 1843 had made nearly instantaneous communication possible
between two distant points. The drawback of the telegraph, however, was
that it still required hand-delivery of messages between telegraph
stations and recipients, and only one message could be transmitted at a
time. Bell wanted to improve on this by creating a “harmonic telegraph,ö
a device that combined aspects of the telegraph and record player to
allow individuals to speak to each other from a distance.
With the help of Thomas A. Watson, a Boston machine shop employee, Bell
developed a prototype. In this first telephone, sound waves caused an
electric current to vary in intensity and frequency, causing a thin,
soft iron plate–called the diaphragm–to vibrate. These vibrations were
transferred magnetically to another wire connected to a diaphragm in
another, distant instrument. When that diaphragm vibrated, the original
sound would be replicated in the ear of the receiving instrument. Three
days after filing the patent, the telephone carried its first
intelligible message–the famous “Mr. Watson, come here, I need youö–from
Bell to his assistant.
73 de Scott KF5JRV
Pmail: KF5JRV@KF5JRV.#NWAR.AR.USA.NA
email: KF5JRV@ICLOUD.COM
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