piece of the frame, being held there by a rod passing through their pro- A LIGHTNING ARRESTER OF NEW FORM. jecting ends. At their opposite ends the blades are We illustrate herewith a sectional view of a form fastened to threaded stems, which pass through the upper crosspiece of the frame and are… … limit the room will be shaded and sheltered from Stop plate and then the frame is outside observation. At the same time an ample suf- IMPROVED LIGHTNING ARRESTER. moved downward to cut the slices. ficiency of light will pass through the translucent During this movement the slots in the arms of the…
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