gang à l’aspirateur 2

Known in French as the "cambrioleurs aspirateur" or “gang à l’aspirateur", the vacuum burglars have led to a flurry of comments on forums around the internet. Here is a run of posts I liked in particular, on hackaday.com:

"It doesn’t make much sense — the only transport systems
I’ve seen like this indeed use negative pressure to get the vessels from one
side of the building to another, but when they land in the safe, they exit the
tube system after passing a venturi-like bypass…re-sucking wouldn’t return the
tubes to the pipe. something fishy is being reported.

Posted at 9:45 am on Sep 24th, 2010 by
Frollard

@Frollard : I believe they are intercepting the money as
it’s going through the tube, not “sucking it back out”.

Posted at 1:18 pm on Sep 24th, 2010 by
Pilotgeek

they probably broke in at night, used the valve where the
tube connects to the safe, drilled through it because its definitely the weakest
point, and then put a vacuum into the safe to grab the
money.

Posted at 3:28 pm on Sep 24th, 2010 by
uky

a simple spring loaded check valve like flap placed over the
pipe in the safe should prevent that.

the bank’s vacuum is probably in the safe so it would suck
open the flap to let the money in but someone applying vacuum from the teller
window will suck the valve shut and not get the money.

if they are lucky they may get the money holder tank if the
bank is big enough to have multiple teller windows or the tubes are stored
inside

Posted at 6:06 pm on Sep 24th, 2010 by
ejonesss"