| 摘要 |
An electrical selector switch including a housing defining a spherical surface, a bearing member defining a spherical surface, and a pivotal member located between the surfaces. The pivotal member carries a spring loaded ball which engages with the surface on the housing to urge a spherical surface on the pivotal member into contact with the spherical surface on the bearing member. The bearing member being shaped to operate switches in selected positions of the pivotal member.
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