Mechenical method to produce preodic cycles

[usmanyousaf]

I am wishing to perform an experiment in which i need to dip the specimen in a solution for 10 minutes and then out in air for next 50 minutes. This is to be done repeatedly but without using any electrical input. Suggest me with a mechanical method that can perform it for 24 hours and 20 days continuously. The idea should be easily feasible. Will be very great full if i am given a suitable solution.

 

[cragar]

a gear driven arm such that it moves in a circle and there is a water tank below, and that when it cuts out its path in water it is only in it for 10 minutes then out in air for 50 minutes. adjust speed with gear reduction and use a gas motor. Why can't you have electrical input. And I was going to say do something with a pendulum but I imagine it would dampen out to quickly.
And maybe if its small use like a watch that winds up to produce the mechanical power.
Or maybe better a pump driven by water that is gravity fed from a tank or a river or stream.
Or make a balance that the specimen sits in with water and have a spring under it and have water flowing and then have something to where after it is submerge for 10 minutes that it dumps the water cause it is to heavy and then take 50 minutes to refill again for dumping. I don't know just some crazy ideas, not thinking to clearly it late.

 

[usmanyousaf]

Cragar,
Thank you for your interest and attention towards my question. Your feedback is highly appreciated. I can not use electricity because a periodic mechanical system sounds more challenging and gas motor will even make the system simple. I want it to be completely mechanical. Can you please further elaborate the idea of pump driven by water that is gravity fed from a tank as i am unable to understand the assembly.

 

[cragar]

Well it would be like a water-wheel , Pelton wheel http://en.wikipedia.org/wiki/Pelton_wheel
the water would fall down a pipe and hit the paddle and turn it, and then we would use this movement to turn an arm connected by a shaft. Like a propeller, and this would dip the specimen in water and then bring it back out. like standing above a pond and swinging a golf club on the pond, on your down swing you would enter the pond and then eventually come out of the pond. Then you would adjust the length of the arm so that it only stayed in the water for ten minutes and out for 50 minutes. Based on how fast the wheel is turning. Or you could have a rod on a camshaft like what they do in an engine to open the valves. Or you could have some type of heat engine like a Stirling engine http://en.wikipedia.org/wiki/Stirling_engine

 

[usmanyousaf]

Thanks Cragar,
I am able to understand it. Will try to work out and hope that i reach some goal. Your concern and efforts are highly appreciable.

 

[cragar]

No problem I like thinking about things like this . I hope that is a simple enough way that works. I wonder if there is a better way.

 

[256bits]

Maybe adapt something like this:

rube goldberg