•   Electric pendulums
•   Electrometer
•   Exciter (discharger)
•   Induction coil
•   Motor-generator
•   Summary

 

 

 

 

 

 
 

ELECTRIC PENDULUMS

Function
Maker: Unsigned Price: Purchase date:
Description   They are made with poles of insulating material placed on wooden circular bases. From the summit of the poles hangs a thread with a little ball of elder.

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ELECTROMETER

Function
Maker: Unsigned Price: Purchase date:
Description   The metallic case is insulated but it is equipped with a lower hook to earth it. The two aluminium leaves are held by a shining sheet, insulated by a big ebonite sleeve and a sulphur cylinder. The two parallel sliding planes defend the leaves and are used to modify the sensibility of the instrument.

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EXCITER

Function   It is used to discharge the Leyden jars.
Maker: Unsigned Price: Purchase date:
Description   The two dischargers, ending with two spheres, are hinged and independent one from the other on a single glass handle. A set screw in the hinge allows to fix the position of the two arcs in a stable manner.

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INDUCTION COIL

Another different induction coil   Pellegrini (2)	(1)
Function
Maker: Unsigned Price: Purchase date:
Description   The induction coils is made of two coaxial coils with a core of iron wires. We have a primary circuit of few turns connected to a battery and to a interrupter.   The secondary is made of a great number of turns and ends with two points that form a spark gap.   By opening and closing the circuit, we obtain a pulsating current in the primary that induces a very high tension on the secondary thus provoking a spark between the two points.

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MOTOR-GENERATOR

Function
Maker: Guernet - Paris Price: L 1125 Purchase date: 1928
Description   We have a dynamo and an engine with the same rotation axe.

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