Abraham Niclas Edelcrantz was inspired by the semaphore telegraph that Claude Chappe (1763-1805) had invented in 1792. Edelcrantz achieved a faster and more accurate telegraph that he presented to King Gustav IV on his birthday on November 1, 1794 by sending a message from Stockholm to Drottningholm.
The telegraph consists of slots that are grouped in columns of three. The shutters have a value per row: 1, 2 and 4 respectively. The numbers 111 - 777 can thus be created. Using a tenth shutter doubles the number of characters to 1024. The system also included a set of codebooks used to interpret the numbers being transmitted. There was usually about 10 kilometers between the stations and the signs were read with spotting scopes.
Photo:
Häll, Peter
/
Tekniska museet
Abraham Niclas Edelcrantz was inspired by the semaphore telegraph that Claude Chappe (1763-1805) had invented in 1792. Edelcrantz achieved a faster and more accurate telegraph that he presented to King Gustav IV on his birthday on November 1, 1794 by sending a message from Stockholm to Drottningholm.
The telegraph consists of slots that are grouped in columns of three. The shutters have a value per row: 1, 2 and 4 respectively. The numbers 111 - 777 can thus be created. Using a tenth shutter doubles the number of characters to 1024. The system also included a set of codebooks used to interpret the numbers being transmitted. There was usually about 10 kilometers between the stations and the signs were read with spotting scopes.
Photo:
Okänd
/
Tekniska museet
Abraham Niclas Edelcrantz was inspired by the semaphore telegraph that Claude Chappe (1763-1805) had invented in 1792. Edelcrantz achieved a faster and more accurate telegraph that he presented to King Gustav IV on his birthday on November 1, 1794 by sending a message from Stockholm to Drottningholm.
The telegraph consists of slots that are grouped in columns of three. The shutters have a value per row: 1, 2 and 4 respectively. The numbers 111 - 777 can thus be created. Using a tenth shutter doubles the number of characters to 1024. The system also included a set of codebooks used to interpret the numbers being transmitted. There was usually about 10 kilometers between the stations and the signs were read with spotting scopes.
Photo:
Okänd
/
Tekniska museet
