| 摘要 |
Unusualy long life and reliability in a selector switch are achieved by providing long-wearing components which, in turn, contribute to an essentially dust-free environment for the contact portions of the switch. Materials of all parts produce a min. of abrasion dust and the conformation of the housing structure provents the entry of exterior dust. A binary coded cam having multiple cam sections sliding contact between spring type contact elements and shorting bars. The rotary element and the two main housing portions are moulded of a highly wear resistant, low friction material.
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