Invention Grant
US4920656A Compass assembly with dial biasing disk 失效
指南针组件带拨盘偏置盘

Compass assembly with dial biasing disk
Abstract:
A compass assembly comprising a base, a dial member received in a recessed portion of the base and rotatable relative the base about a dial member central longitudinal axis, and a compass housing received in a recessed portion of the dial member and fixedly secured to the base by a connecting disk. The disk has a first surface attached to the housing and a second surface attached to the base and a peripheral edge surface positioned in frictionally engaging contact with the dial member. The dial member is biased against rotation relative the base and the compass housing by the disk.
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