4930050
2nd -telegraph
- History/Background
- The term was used in
1792 using two greek
words; tele "far" and
graphen "to write" but
the principle is much
older.
- The earliest forms of telegraphy were
smoke, fire, and drum signals. Around
300 B.C. Greeks made a plan/ method
of alphabetic signaling using large
vases visible from a distance. The
vases used a system of grids with row
and columns.
- A similar system was used by midieval
prisoners using tapping signals between cells,
using grids. In the late 18th century optical
telegraphs were invented by Claude Chappe
in France and George Murray in England. They
were called semaphores, they relayed
messages from hilltop to hilltop using
telescopes.
- Essential Question
- How would our world be without the
telegraph ? Did You ever think that we would
some day the telegraph would be outdated
and we would all have affordable hand held
devices , far more advanced than the
telegraph ? How did the morse code become
an idea or theory?
- How would our world be without the
telegraph ? Did You ever think that we would
some day the telegraph would be outdated
and we would all have affordable hand held
devices , far more advanced than the
telegraph ? How did the morse code become
an idea or theory?
- Impact on society
- it made
communication
alot faster
- It ended the
pony express
- The lines were
super
expensive .
Many peoples
atxes went to
the building of
them
- it made
communication
alot faster
- important information about the telegraph
- * How it works
- an electric circuit is consisting of 3 parts linked
by wire .The battery supplied voltage . Morse
code completed the electric circuit and the
electromagnetic circuit for the sounder
- an electric circuit is consisting of 3 parts linked
by wire .The battery supplied voltage . Morse
code completed the electric circuit and the
electromagnetic circuit for the sounder
- Morse code -- --- .-. ... . / -.-. --- -.. .
- Is a series of dots and
dashes representing
the alphabet
- held for a short
amount of time - dot
held for a longer
period of time - line
- the sender would hi the
button on the telegraph,
making the button on the
other side press down .
Leaving a mark . All this was
done due to
electromagnetic waves from
the wires
- Is a series of dots and
dashes representing
the alphabet
- The telegraph was
made in 1837
- Ithe City was
Morrison New
Jersey
- Samuel Morris was
the inventor
- Fun Facts on Morse -
Graduated from Yale ,
He was born in Boston .
He also was an
american Painter
- Fun Facts on Morse -
Graduated from Yale ,
He was born in Boston .
He also was an
american Painter
- Samuel Morris was
the inventor
- Ithe City was
Morrison New
Jersey
- * How it works
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