Pre-Radar

Before the radar was invented there were some great ideas floating around…

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Turning sound receptor - used as an "advanced" their own ears. Inventor Professor Meyer in 1880.

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English locator 1938

Acoustic radar, kept the United States armed forces in 1921

Acoustic radar, kept the United States armed forces in 1921

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Acoustic marine locator. Jean Auscher from France.

Acoustic marine locator. Jean Auscher from France.

Experiments of Englishman Reva Bacon in 1898

Experiments of Englishman Reva Bacon in 1898

English Locator MK1 (1914-1918 biennium). Used in the First World War to detect enemy aircraft.

English Locator MK1 (1914-1918 biennium). Used in the First World War to detect enemy aircraft.

Four-"ears" locator. Date and manufacturer unknown.

Four-"ears" locator. Date and manufacturer unknown.

Acoustic radar, kept the United States armed forces in 1921

Acoustic radar, kept the United States armed forces in 1921

Czech locator, 1920 (?). Two ears are vertical, two horizontal

Czech locator, 1920 (?). Two ears are vertical, two horizontal

Czech locator that can be used by one person.

Czech locator that can be used by one person.

English locator, 1930's

English locator, 1930's

Japanese locator from the 1930's

Japanese locator from the 1930's

French locator from the 30's

French locator from the 30's

German locator RRH, 1940

German locator RRH, 1940

Mobile Locator U.S. Army (early 40's)

Mobile Locator U.S. Army (early 40's)

England, 1928 10 meters concrete antenna

England, 1928 10 meters concrete antenna

England, in 1930 70 meters Locator-wall. Can "hear" aircraft flying at a distance of 100 km

England, in 1930 70 meters Locator-wall. Can "hear" aircraft flying at a distance of 100 km