alb1465872
Quadruplex telegraph invented by Thomas Alva Edison (1847-1931) in 1874. It could send and receive four telegraph messages simultaneously on a single wire, two signals in each direction. Engraving.
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Caption:
Quadruplex telegraph invented by Thomas Alva Edison (1847-1931) in 1874. It could send and receive four telegraph messages simultaneously on a single wire, two signals in each direction. Engraving.
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Credit:
Album / Prisma
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Image size:
6339 x 2763 px | 50.1 MB
Print size:
53.7 x 23.4 cm | 21.1 x 9.2 in (300 dpi)
Keywords:
1874 • 19 CENTURY • 19TH CENTURY • 19TH CENTURY. • 19TH • 19TH-CENTURY • AMERICA NORTH • AMERICA • AMERICA. • AMERICAN • AMERICANS • AMERICAS • AMERICAS, THE • ARTFORM • CIENCIA • COMMUNICATE • COMMUNICATIONS • CONTEMPORARY AGE • CONTEMPORARY DECADE • CONTEMPORARY EPOCH • CONTEMPORARY HISTORY • DESIGN • DEVISER • EDISON • EDISON, THOMAS ALVA • EE. UU. • EEUU • ELECTRIC • ELECTRICAL • ENGINEERING • ENGRAVED • ENGRAVING (ARTWORK) • ENGRAVING • ENGRAVING. • ENGRAVINGS • ESTADOS UNIDOS USA EEUU EE. UU. EUA E. U. A. • ETCHING • FICTION • FOUR • HISTORIA UNIVERSAL • HISTORIA • HISTORY • HISTORY. • INVENT • INVENTION • INVENTIONS • INVENTOR (MALE) • INVENTOR • KNOW-HOW • MESSAGE • NINETEENTH CENTURY • NORTH AMERICA • NORTH AMERICAN • ORIGINATOR • PRINT • QUADRUPLEX • SCIENCE • SCIENCES • SIMULTANEOUSLY • SINGLE • TECHNICAL • TECHNIQUE • TECHNOLOGY • TEHNOLOGY • TELECOMMUNICATION • TELECOMMUNICATIONS • TELEGRAPH • TELEGRAPHIC • TELEGRAPHS • TELEGRAPHY • U S A • U. S. A • U. S. A. • U.S. • UNITED STATES AMERICA • UNITED STATES OF AMERICA • UNITED STATES • UNITED STATES, THE • UNITES STATES OF AMERICA USA • USA • USA. UNITED STATES • WIRE • XIX CENTURY
