Sitting in the pub the other night, as you do, I looked at an optic on the vodka bottle. Each dispence has to be accurate, the optic itself is a very complex shape, it's round has tapered sides and the mechanics of the valve are internal affecting the volumne. The question is how did they calculate the internal size to dispense the exact volume, by trial and error or by maths, or maybe do you think I should get more friends to drink with?

[Edited on 4/12/11 by LBMEFM]

What's the meaning of life?

almost certainly designed using 3d CAD in which case its a doddle.

Probably possible to do it with maths too if you're smart, integrating revolving sections etc

I would think the dispensing valve system came first then different shaped optics are easy to calculate using simple maths.
Valve system volume + dispensing volume = optic volume.
Archimedes principle to calculate valve volume

Didn't they use to be a straight sided conical shape? In which case, it's simple maths, and then when 3D cad came along as above etc...

And before anyone mentions how old am I to remember it, well I'm only 35...




It's just that I've been on the spirits since I was 4

I think we attribute too much intelligence to CAD systems (having run one professionally for many years) They cannot allow for variable shrinkage and distortion due the moulding process.

I suspect the real answer is there is a wide range of adjustment in the valve system, they design it 'about right' and calibrate it afterwards. Simples

If i was designing one i would concentrate on getting an erganomic reliable tap. this incorporates a backing plate.

its then a simple case of getting the front optic the right volume to produce 50ml. if the valve robs the volume little then so be it. it makes the drunk guy at the bar think he is getting more for his money although he is obviously not!!

Sounds like you have the same conversations as me and my sad mates!!

quote:

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Originally posted by plentywahalla
I suspect the real answer is there is a wide range of adjustment in the valve system, they design it 'about right' and calibrate it afterwards. Simples

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And I bet you read the beer mats too.......

i wonder why they are called optics? haven't anything optical about them really, apart from you can see the liquid inside, possibly not always?

Probably called optics, because they are designed so that you and the bar person can see them? Simples. and also simples how they designed them with simple maths, then made cheaply as most are plastic then adjusted back into line until exact.