telegraph

Question 1

intro of telegraph system

Answer 1

14-may-1844
event: samuel morse successfully establishes a telegraph link between baltimore and washington DC.
message: “what hath god wrought”

Question 2

origin of telegraph system

Answer 2

term “telegraph” coined by claude chappe for signaling methods, intro in france in 1793.
electric telegraph idea: born in early 19th century as experiments with electricity showed its potential for transmitting msgs

Question 3

early experiments with electric telegraph

Answer 3

scientific experiments: charles morrison(1753), larlv friedrich gauss, wihlem wber(1833)
charles wheatsone(1839)
-electromagnet in 1820: morse encounter with electromagnet on a transatlantic ship: innovations: Wheatstone telegraph, steinheils telegraph

Question 4

samuel morse and the practical telegraph system

Answer 4

innovation: morses patent in 1837 for electric telegraph.
collaboration: morse worked with joseph henry to develop the system
functional innovation: use of code( dots and dashes) to transmit letters of alphabet.
may 14, 1844- link between baltimore and washington DC

Question 5

telephone design evolution

Answer 5

original design: modified telegraph, transmitting the sound.
improvements: magnetic telephone design with a transmitter receiver and a magnet.
diaphragm: metal disk in the transmitter and receiver vibrated to transmit sound

Question 6

alexander graham bell and the operational telephone

Answer 6

1876: interest in telephony derived from vocal physiology and speech instruction to deaf.
patent: awarded for 1st operational telephone.
experiment: june,2,1875, harmonic telegraph experiment with thomas watson

Question 7

intro of the telephone

Answer 7

invention: telephone, a point to point messaging facility using spoken words
johann phillip reis: demonstrated working electrical voice transmission system in 1863

Question 8

days of morse code

Answer 8

transmission speed: about 4.6 bits per sec in the latter half of 1800s
communication method: morse code tapped out by a human hand.
device: telegraph key for transmission, metal bar on the receiver for creating clicking sound

Question 9

application and significance of morse

Answer 9

communication sectors: railways, associated with press, industry.
military use: demonstrated during civil war for troop control and intelligence
dominance: throughout the 19th century

Question 10

telephone advancements and challenges

Answer 10

thomas edison: movable listening earpiece and stationary speaking tube.
manual telephone exchange: opened in 1878, served 21 costumers in new haven Connecticut.
automatic number calling intro: 1891
long distance service: 1881