1929 ⟶ Ball Screw Invention

The ball screw is invented by Rudolph G. Boehm.
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Year
1876
1886
1893
1898
1929
1931

⚙️ Nicolaus Otto Develops the Four-Stroke Engine

Nicolaus August Otto invents the four-stroke cycle.⟶
Nicolaus Otto Develops the Four-Stroke Engine (1876)
Internal Combustion EngineIndustrial RevolutionTransportationManufacturing
GermanyGermany

🔋 Carl Gassner Invents the Zinc-Carbon Dry Cell Battery

Carl Gassner invents the zinc–carbon battery, the first dry cell battery, making portable electronics practical.⟶
Carl Gassner Invents the Zinc-Carbon Dry Cell Battery (1886)
BatteryElectricityIndustrial Revolution
GermanyGermany

⚙️ Rudolf Diesel Patents the Diesel Engine

Rudolf Diesel invents the diesel engine (although Herbert Akroyd Stuart had experimented with compression ignition before Diesel).⟶
Rudolf Diesel Patents the Diesel Engine (1893)
Internal Combustion EngineTransportationIndustrial RevolutionEnergy
GermanyGermany

🧪 Pechmann Synthesizes Polyethylene

Hans von Pechmann synthesizes polyethylene, now the most common plastic in the world.⟶
Pechmann Synthesizes Polyethylene (1898)
ChemistryMaterials ScienceIndustrial Revolution
GermanyGermany

⚙️ Ball Screw Invention

The ball screw is invented by Rudolph G. Boehm.⟶
Ball Screw Invention (1929)
Mechanical EngineeringPrecision EngineeringManufacturingAutomationMachine ToolsIndustrial Revolution
GermanyGermany

🔬 Ernst Ruska Invents the Electron Microscope

The electron microscope is invented by Ernst Ruska.⟶
Ernst Ruska Invents the Electron Microscope (1931)
MicroscopyPhysicsInstrumentationScientific RevolutionMedical AdvancementsMaterials Science
GermanyGermany