3 ms·
I still remember my mom using them at a "drive thru" at our bank in the early 1980s. Instead of a window you'd pull up to a tube station. Slips of papers would
by mapgrep 12y ago
I still remember my mom using them at a "drive thru" at our bank in the early 1980s. Instead of a window you'd pull up to a tube station. Slips of papers would go in and come out. I think she even did withdrawals this way. (No idea how this was secure, given how far the observation window was from the farthest tube stations. Maybe there were cameras.)
- VLM 12y agoMaybe its a state law thing, but we have these tubes today at local bank drive thru and local walgreens pharmacy. They have cameras now of course. I've always been interested in building a tube into my house for the pure heck of it, because I can. Main problem is I believe PVC pressure rating for compressed air is 0 psi, so there "seem" to be enhanced modern materials that make the job easy, but things aren't as simple as they appear. Also its harder than you'd think to go bidirectional. Unidirectional with simple one way flaps and a timer hooked up to a valve (about a 5 minute arduino project) is pretty simple. Bidirectional is not so simple.