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Pneumatic post or pneumatic mail is a system to deliver letters through pressurized air tubes. It was invented by the Scottish engineer William Murdoch in the 19th century and was later developed by the London Pneumatic Despatch Company .
Pneumatics (from Greek πνεῦμα pneuma 'wind, breath') is the use of gas or pressurized air in mechanical systems. Pneumatic systems used in industry are commonly powered by compressed air or compressed inert gases. A centrally located and electrically-powered compressor powers cylinders, air motors, pneumatic actuators, and other ...
An air line is a tube, or hose, that contains and carries a compressed air supply. In industrial usage, this may be used to inflate car or bicycle tyres or power tools worked by compressed air, for breathing apparatus in hazardous environments and to operate many other pneumatic systems.
Prague pneumatic post (Czech: Pražská potrubní pošta) is the world's last preserved municipal pneumatic post system. [1] It is an underground system of metal tubes under the wider centre of Prague , totaling about 55 km (34 miles) in length. [ 2 ]
The Beach Pneumatic Transit was the first attempt to build an underground public transit system in New York City. It was developed by Alfred Ely Beach in 1869 as a demonstration subway line running on pneumatic power .
From January 2008 to December 2012, if you bought shares in companies when Patricia Q. Stonesifer joined the board, and sold them when she left, you would have a 163.1 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
An automated vacuum waste collection system, also known as pneumatic refuse collection, or automated vacuum collection (AVAC), transports waste at high speeds through underground pneumatic tubes to a collection station where the waste is compacted and sealed in containers. Full containers are transported away to be emptied.
From January 2008 to December 2012, if you bought shares in companies when Thomas H. Kean joined the board, and sold them when he left, you would have a -67.6 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
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