Fig. 165. EPINUS' CONDENSER,
Epinus' Condenser.
Two circular brass plates, A and B, are mounted on insulating supports,
and arranged to be moved towards or away from each other as desired.
Between them is a plate of glass, C, or other dielectric. Pith balls may
be suspended back of each brass plate as shown. The apparatus is charged
by connecting one plate to an electric machine and the other to the
earth. The capacity of the plate connected to the machine is increased
by bringing near to it the grounded plate, by virtue of the principle of
bound charges. This apparatus is used to illustrate the principles of
the electric condenser. It was invented after the Leyden jar was
invented.
Fig. 166. EPINUS' CONDENSER.
E. P. S.
Initials of Electrical Power Storage; applied to a type of secondary
battery made by a company bearing that title.
Fig. 167. CAM EQUALIZER.