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Magnetic force is used to hold an electrical switch actuator in bistable open or closed position.
English (United States)
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Magnetic Electrical Switch With Removable Key Actuator
Magnetic force is used to hold an electrical switch actuator in bistable open
or closed position.
An electrical switch is formed by using a permanent magnet 10 made of
electrically insulating material with magnetically permeable pole pieces 12 (Figs.
1 and 2). Nonelectrically insulating magnetic material may be used in
conjunction with insulating shims between the magnet and pole pieces.
Removable key actuator 14 is made of a magnetically permeable material in a
configuration such that it can be inserted into slot 16, which is an opening in the
frontal electrical insulating material of switch body 30 (Figs. 2 and 3).
Actuator 14 (Figs. 1, 2 and 4) can be rotated using the electrically insulated
handle 18; this causes an electrically conductive metal clad portion 20 of actuator
14 to be rotated to either of the bistable positions shown in Fig. 1, thereby
causing the electrical conductor clad portion 20 to open or close the electrical
circuit. Member 22 is an electrical insulator which prevents the electrical
contacts from closing. The actuator is held in either open or closed position by
Pole pieces 12 are selectively clad with an electrically conductive material 26
(such as copper) in the area where the actuator 14 conductive material 20 will
make contact. Screws 24, made of conventionally electrically conductive metal
(such as copper) penetrate through and make electrical contact with conduct...