| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a bathometer wherein water depth can be measured even in horizontally distant places, a depth when a fish is caught by a hook can be measured, measurement operation is easy so that anyone can handle and the bathometer is easy to carry. SOLUTION: A water flow between a primary hydraulic chamber 2 and a secondary hydraulic chamber 3 is controlled in opening/closing by a valve 4 of a trigger mechanism. Tongue-shaped spring boards with base tied are overlaid on a sheet 7 of a main frame, a display plate 12 is further overlaid thereon, and they are fixed airtightly. A space is provided between the spring plate and the display plate 12 so that there is some clearance between a protrusion of the spring plate and the display plate 12 above it when the spring plate is horizontal. Through holes B are provided respectively on a tip of a center pin of the valve and one of ends of the main frame opposite thereto for tying a line to a gadget.</p> |
