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Patent model of Daniel Hess's carpet sweeper. In 1860 a manual vacuum cleaner was invented by Daniel Hess of West Union, Iowa. Called a "carpet sweeper", it gathered dust with a rotating brush and had a bellows for generating suction. [4] [5] Another early model (1869) was the "Whirlwind", invented in Chicago in 1868 by Ives W. McGaffey. The ...
A street sweeper or street cleaner is a person or machine that cleans streets. People have worked in cities as " sanitation workers " since sanitation and waste removal became a priority. A street-sweeping person would use a broom and shovel to clean off litter , animal waste and filth that accumulated on streets.
A carpet sweeper typically consists of a small box. The base of the box has wheels and brushes, connected by a belt or gears or rollers. There is also a container for dirt. The arrangement is such that, when pushed along a floor, the rollers/wheels turn and force the brushes to rotate. The brushes sweep dirt and dust from the floor into the ...
Hobart's Funnies is the nickname given to a number of specialist armoured fighting vehicles derived from tanks operated during the Second World War by units of the 79th Armoured Division of the British Army or by specialists from the Royal Engineers.
A preserved World War II Sherman Crab, an M4 Sherman tank fitted with a flail. A mine flail is a vehicle-mounted device that makes a safe path through a minefield by deliberately detonating land mines in front of the vehicle that carries it.
The design of the class drew on lessons learnt in the Second World War when it became apparent that minelaying in coastal waters was more effective than in the deep sea; the existing fleet minesweepers were not well suited to deal with this threat.
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