Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1986-11-24
1988-04-12
Griffin, Donald A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
361220, G03B 104, H01H 4700
Patent
active
047378093
ABSTRACT:
A mechanism for eliminating static electricity for a camera in which the static electricity charge on a photographic film or a magnetic tape is led to a grounding part formed on a camera body through a guide roller means made of electrically conductive material which is constantly pressed, while rotating, into contact with the photographic film or the magnetic tape which is wound up onto a winding spool.
REFERENCES:
patent: 1530704 (1925-03-01), Thomson
patent: 3128687 (1964-04-01), Dahlgren
patent: 4482229 (1984-11-01), Sugiura
Canon Kabushiki Kaisha
Griffin Donald A.
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