English Dictionary

Jim Crow

IPA（発音記号）

/ˌdʒɪm ˈkɹoʊ/

名詞

歴史的

(military, historical) A World War II code name for patrols along the British coastline to intercept enemy aircraft, originally intended to warn of invasion in 1940.

日本語の意味

第二次世界大戦中、1940年にイギリス海岸で敵航空機の侵入を阻止するために実施されたパトロール活動のコードネーム。

In 1940 the Royal Observer Corps launched Jim Crow patrols along the British coastline to warn of and intercept enemy aircraft.

1940年、王立観測隊は敵機の警戒と迎撃のために、イギリス沿岸で沿岸哨戒（第二次世界大戦のコードネーム）を実施した。

意味（1）

(military, historical) A World War II code name for patrols along the British coastline to intercept enemy aircraft, originally intended to warn of invasion in 1940.

… flying cannon equipped Spitfires V’s mainly on ‘Jim Crow’ operations (operational Patrols along the home coastline intercepting any hostile aircraft and looking out for any invasion forces).

意味（2）

(engineering) A double-action planing tool invented by Joseph Whitworth, in which the blade ‘jumps’ to face the other way on the back-stroke.

Two other machines exhibited by Whitworth… One was furnished with a reversing tool to plane both ways, and called, from its peculiar motion, a Jim Crow machine.

意味（3）

(rail transport) A tool for bending railway rails, by holding the rail with two arms and pushing a screw into the other side.

When rails have to be bent with a Jim Crow, as in setting stock or check-rails, or straightening a bent rail, they should always be heated first, or they are liable to crack, especially steel rails.