What is the pneumatic tube transport?
Pneumatic tube systems (also termed PTT, airlift, air tubes, air transport, Lamson tubes, and pneumatic transit methods) are amazingly simple—and best illustrated by model…
Suppose you run a great department store complete of checkouts (cash desks) that are taking money from customers all day lengthy. To decrease the risk of theft, it’s a great idea to collect that money every so often and transfer it to a place that’s more secure before you deposit it in the bank.
You could have a cashier walk around all the checkouts in turn, but that takes time, and it performs the cashier exposed to robbery. Also, some checkouts will take money more frequently than others, so it’s usually better if the checkout operator dispatches money at frequent intervals as it suits them.
A standard solution numerous stores operate is to have a pneumatic tube system linking each checkout with the cashier’s department, a strong room frequently located on a different floor of the structure. Each time the checkout operator collects more than a certain quantity of cash, they dispatch it securely to the cashier’s department utilizing the Pu Tube.
How does pneumatic tube transport trade?
For simplicity, let’s imagine we’re linking one checkout with the cashier’s department. The checkout has a considerable metal box called the shipping station with a door that unfolds onto a tube. Some systems beget doors that lock with keys or start with numeric keypads and PIN estimates; others are unsecured.
The tube (a pipe composed of something like PVC plastic or a robust lightweight metal before-mentioned as aluminum) moves all the way to the cashier’s department, often only a little objective but sometimes up to 600m (~2000ft) or so.
At the cashier’s department, the tube attaches to an extra sophisticated box called the receiving station, which may also have a lockable door.
This is sometimes also described the powered station, because it provides the air power that drives packages back and forth. It’s mostly the same as the shipping station, but it possesses a compressed air pump attached that can either absorb air from the tube or blow air into it according to which way under the tube packages needs to be sent.
Often, the transportation and receiving stations have chimes, ringers, or flashing lights to register when a package has just been installed.
Most of the time the taking station will be accumulating cash packages from the checkouts so it will be set to drawing mode (also called vacuum mode). This means the compressor will be acting as a vacuum cleaner, so it sucks air along the tube from the sending station. If someone wants to transfer cash from the sending station, they place it into a sturdy cylindrical, plastic canister (only slightly tinier than the tube and very snugly fitting), place it in the container in the sending station, and close the door.
When correctly placed, it blocks and seals the tube. Now as the compressor sucks on the machine, it creates a partial space in front of the canister that sucks it all the process along until it enters the receiving station, where it can be unloaded. Cartridges can be sent in the opposite direction by merely setting the compressor to blow air forward the tube in the opposite direction (behind a canister, pushing it along); department stores often transmit the small change back to checkouts that way.