Displacement Vessel Glass

It consists of a scale mounted vertically on stand, a spring with pointer and provision to hang set of slotted weights.

(a) Mirror Scale 12cm long
(b) S.S. Scale 12cm long
(c) Plastic Scale 12cm long
(d) Mirror Scale 15cm long
(e) S.S. Scale 15cm long
(f) Plastic Scale 15cm long

This apparatus is used to determine G by measuring the time of fall of a steel ball through a pre- determined distance..

The time taken being less than one second, a centi second/ milli second timer capable of measuring the time in fraction of seconds has to be used.

Comprises two units each of which is mounted on a plastic which can be clamped on a 12 mm diameter retort rod. Connections are taken out to 4 mm sockets. The solenoid unit has a metal core which facilitates prompt release of the sphere on de-energizing.

The gate switch comprises a hinged steel plate to hold against an adjustable contact by means of a small permanent magnet, the plate falls away promptly at the impact of falling steel ball. The apparatus is supplied with a solenoid unit, gate switch, Steel Ball 18 mm dia and a stand.