Apparatus for preventing static electricity of plastic lens

Details Apparatus for preventing static electricity of plastic lens Apparatus for preventing static electricity of plastic lens

1990-04-18

1991-01-15

Gellner, Michael L.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

354202, 354203, 354286, 361212, G03B 1700

Patent

active

049857193

ABSTRACT:
An apparatus for preventing static electricity of a plastic lens has the plastic lens coated with a transparent conductive coating; and a conductive member for electrically connecting the coating of the plastic lens to an electric circuit within a camera such that static electricity of the plastic lens is guided to the electric circuit. The preventing apparatus may have a plastic lens coated with a transparent conductive coating; a first electric circuit electrically connected to the coating of the plastic lens through a first conductive member; a conductive pressure plate for pressing a film toward an aperture; a second electric circuit electrically connected to the pressure plate through a second conductive member; a third electric circuit electrically connected through a third conductive member to a magazine attached to a camera; and a device for making the potentials of the magazine, the pressure plate and the plastic lens equal to each other. The preventing apparatus may have another structure for preventing the static electricity of a plastic lens.

REFERENCES:
patent: 4319821 (1982-03-01), Teyulsa et al.

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