Reaction Time

Stick before dropping

Bell , Solenoid & Cam Assy.

The Dropping stick is made out of wood with SS etched scale fitted in a recess. The assembly slides on two corners in Teflon fitted slides . The timer Assy. is made with a one RPM motor with 3 positions cam . The positions are not uniform thus it is difficult to guess the next release time. The holding is done with a Solenoid latch . The solenoid releases the stick , strikes the Bell and Lights the Bulb.

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Eyeballs

Eye balls are made out of semi sphericals adjusted for the focal length. For both the eyeballs the

eye lens is +3 Diopter. Movable spectacles is operated from a flexible shaft with a lever outside the glass enclosure. The +1 lens is mounted in the spectacle for Long Sight and -1 lens is mounted for the short sight spectacle.

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Co-0peration

This is a very interesting exhibit which tests the patience of the visitors also. The pull string pass over pulley with ball bearings.

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3D-Zeotrope

We have used 'Piaggo' scooter front wheel assembly along with the wheel rim. The table is mounted on the rim and the rim also used as a pulley. The strobe is a standard one which they use in the theatres.

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