Aid apparatus for level surveying instrument
OwnerYang Cheng-Iinventor
Life of this patent
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Abstract
An aid apparatus for level surveying instrument comprises a housing having a receiving chamber therein, two channels at opposite ends of the receiving chamber respectively, a window at one side of the receiving chamber, and a socket opening at the side wall of the housing connecting to receiving chamber via the channel. A controlling member is slidable received in the housing. The controlling member has a movable bar, two seal block disposed at opposite ends of the movable bar for sealing the channel, and a driving member is provided at the housing for driving the controlling to shift, whereby the sealing block being driven by the driving member to seal the channel and to depart from the channel to prevent bubbles formed in liquid.
Claims12
An aid apparatus for level surveying instrument, comprising:
- a housing having a receiving chamber therein, a channel at one end of said receiving chamber, a window at one side of said receiving chamber, and a socket opening at the side wall of said housing connecting to said receiving chamber via said channel;
- a controlling member slidable received in said housing;
- said controlling member having at least one seal block to seal said channel for isolating said receiving chamber from said socket opening, and
- a driving member provided at said housing for driving said controlling member to shift, whereby said sealing block being driven by said driving member to seal said channel and to depart from said channel.
Dependencies are inferred from the claim text.