The Paris pneumatic post was a pneumatic tube message-carrying service that operated in the French capital from 1866. It was established because of the popularity of the electric telegraph in the city which had led to the signal cables becoming overloaded and messages being sent by road. The pneumatic system allowed the telegraph companies to send messages underground through sealed lines laid in the Paris sewers, bypassing any traffic on the roads above. The network was taken into public ownership in 1879, under the Ministry of Posts and Telegraphs, and opened to messages sent by the general public. Messages continued to be considered officially as telegrams and for a fixed cost users could write a message on a "petit bleu" form to be sent anywhere in the city. After arriving at the office nearest the recipient it would be taken to their address by a courier.
Originally driven by steam-powered vacuum pumps and compressors the network was modernised to electricity-driven machinery from 1927. The Paris pneumatic post reached its greatest extent in 1934 with 427 kilometres (265 mi) of pneumatic pipes and 130 offices in service. The number of messages sent peaked in 1945 at 30 million. Budget restrictions from 1945 hampered the network as maintenance and upgrades were cut. With declining usage the network was closed in 1984. A parallel system operated for official purposes and connected several government buildings. Part of this network, connecting the senate, national assembly and officers of the Journal Officiel de la République Française, survived in use until 2004.
and 21 Related for: Paris pneumatic post information
The Parispneumaticpost was a pneumatic tube message-carrying service that operated in the French capital from 1866. It was established because of the...
in Paris (the Parispneumaticpost) was in use until 1984, when it was abandoned in favor of computers and fax machines. The Prague pneumaticpost commenced...
London, via the London Pneumatic Despatch Company; in Manchester and other British cities; and in Paris via the Parispneumaticpost. Following the creation...
Prague pneumaticpost (Czech: Pražská potrubní pošta) is the world's last preserved municipal pneumaticpost system. It is an underground system of metal...
Degas during the Siege of Paris. He was involved in numerous engineering projects, including tubes for the Parispneumaticpost, a prototype for making...
company grew, it began to manufacture pneumatic bicycle tires, eventually leading to the production of pneumatic automobile tires in 1896, making BFGoodrich...
15-18 psi (although usually operable up to 20 psi). Pneumatic thermostats typically provide output/ branch/ post-restrictor (for single-pipe operation) pressures...
a removable pneumatic tyre which was used by Charles Terront to win the world's first long-distance cycle race, the 1891 Paris–Brest–Paris.[citation needed]...
Airport. The guard rail, to which various antennae are attached, can be pneumatically lowered. In 1934, the old Montparnasse station located on the edges...
air is used for many purposes, including: Pneumatics, the use of pressurized gases to do work Pneumaticpost, using capsules to move paper and small goods...
a 29-tonne, 13ft by 9ft Swiss safe at his studio. The safe contains a pneumatic pump connecting two barrels, one with acid powder and the other with an...
either by tilting the ship back and forth to dislodge it or by using a pneumatic pump to loosen the weights. Dives by Titan to the wreck of the Titanic...
not plugged, the fuselage would not retain pressure, eliminating any pneumatic force on the hatch. Also, there was an indicator light in the cockpit...
sinuses and pneumatics bones, hock joints, sternal bursa, foot pads, peritoneal cavity and oviducts. In acute cases, the most typical post-mortem lesion...
major contributions to a range of scientific fields including botany, pneumatic chemistry and physiology. He was the first person to measure blood pressure...
became the first manufacturer to fit rubber tyres (solid, rather than pneumatic) to a petrol-powered car.[citation needed] Due to family discord, Armand...
an implantable rotating pump with an external electric motor, and a pneumatic pump. Paul Winchell designed a model of artificial heart with the assistance...
Daumesnil, Paris in 1839. Virtually all ambient fairground music continued to be produced by fairground organs and similar pneumatically operated instruments...
L.J. (1976). "Concorde has designed-in reliability". Hydraulics and Pneumatics. 29: 51–55. Archived from the original on 23 August 2012. Collard, D....
electrical illumination (1878), the telephone (1879), and the use of pneumatic tubes to transport cash and documents (1880) to the department store business...