principle of Mr. Duckham’s machine is very simple, and much toward extending and perpetuating their use. translation and exert their greatest destructive power. consists of the filling of an open-top cylinder with water or Our engravings illustrate a new nut-lock, invented by Mr. According to the… … compartment, or by a Fig. 1 shows a fish-joint, series of water-tight com- having its nuts locked by BOLTS. partments, placed near S IMPROVED NUT LOCK FOR FISH-PLATE the device under considera- the upper edge of the vertical plate or wall, as shown in the A piston passes downward through the…
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-450-220.webp)
