1835 ⟶ Joseph Henry Develops the Electromechanical Relay

Joseph Henry invents the electromechanical relay.
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1835
1836
1837
1839
1844
1849

💡 Joseph Henry Develops the Electromechanical Relay

Joseph Henry invents the electromechanical relay.⟶
Joseph Henry Develops the Electromechanical Relay (1835)
Electrical EngineeringElectromagnetismCommunicationTelegraphyAmerican History
United StatesUnited States

🔫 Samuel Colt Establishes Firearms Company and Introduces Revolver

Samuel Colt popularizes the revolver and sets up a firearms company to manufacture his invention of the Colt Paterson revolver a six bullets firearm shot one by one without reloading manually.⟶
Samuel Colt Establishes Firearms Company and Introduces Revolver (1836)
American HistoryFirearmsWeaponsManufacturing
United StatesUnited States

✉️ Samuel Morse Develops Morse Code

Samuel Morse invents Morse code.⟶
Samuel Morse Develops Morse Code (1837)
CommunicationTelegraphSamuel MorseElectrical Engineering
United StatesUnited States

⛏️ William Otis Develops the Steam Shovel

William Otis invents the steam shovel.⟶
William Otis Develops the Steam Shovel (1839)
Industrial RevolutionConstructionTransportationMining
United StatesUnited States

📡 First Public Telegraph Line Begins Operation

First publicly funded telegraph line in the world—between Baltimore and Washington—sends demonstration message on 24 May, ushering in the age of the telegraph. This message read "What hath God wrought?" (Bible, Numbers 23:23)⟶
First Public Telegraph Line Begins Operation (1844)
TelegraphCommunicationAmerican HistorySamuel MorseTransportation
United StatesUnited States

🔫 Walter Hunt Invents Repeating Rifle with Metallic Cartridges

Walter Hunt invents the first repeating rifle to use metallic cartridges (of his own design) and a spring-fed magazine.⟶
Walter Hunt Invents Repeating Rifle with Metallic Cartridges (1849)
FirearmsWeaponryAmerican HistoryMilitary Technology
United StatesUnited States