Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1977-11-02
1980-12-16
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335229, H01F 708
Patent
active
042400554
ABSTRACT:
In an electromagnetic release for a camera a normally de-energized electromagnet is coupled with unitarally joined elongated pole pieces, and when energized, generates a magnetic flux opposing the magnetic flux of a permanent magnet. A moveable, magnetizable armature adjacent corresponding ends of the pole pieces is normally attracted by the pole pieces as a result of the flux of the permanent magnet when the electromagnet is deenergized. The permanent magnet is positioned between the pole pieces. A spring biases the armature to disengage it from the faces of the pole pieces.
REFERENCES:
patent: 3530454 (1970-09-01), Zocholl
patent: 4020433 (1977-04-01), Uchidoi
Aizawa Hiroshi
Hashimoto Teiji
Ito Tadashi
Miyakawa Hideaki
Shimizu Masami
Broome Harold
Canon Kabushiki Kaisha
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