Title:
ELECTROMAGNETIC CONTROLLER OF CAMERAS
Document Type and Number:
Japanese Patent JPS548522
Kind Code:
A
Abstract:
PURPOSE: To perfectly prevent the entry of dust into dustproof case by disposing a permanent magnet to the circumference of the take-out port at one end of the signal member of the dustproof case which contains an electromagnet, its suction member and the signal member operating cooperatively with this, and hermetically sealing the spacing thereof with magnetic fluid.
Inventors:
MIYAGAWA HIDEAKI
IDA RIYOUICHI
IDA RIYOUICHI
Application Number:
JP7351377A
Publication Date:
January 22, 1979
Filing Date:
June 21, 1977
Export Citation:
Assignee:
CANON KK
International Classes:
G03B9/62; G03B9/08; (IPC1-7): G03B9/08
Next Patent: EXPOSURE CONTROLLER OF CAMERAS