which rested upon brick walls shown in Fig. 1, thereby permitting a close folding of pelling wheel, are two sprocket wheels of different sizes, the umbrella. The ribs are pivotally connected by was found to be deeply pitted at a number of places, connected by proper chains with wheels on the shaft… … BERGESEN'S FOLDING UMBKELLA. swing upward and outward, thus moving the stitutes a decided economy, added to great ribs and the covering material into their proper facility in extraction and utilization. The places. The folding of the umbrella is readily accom- structure of the plant permits of the…
Munn · Device · Patents · Scientific American · Oil · American chemical · Shooting star · Shooting stars · Illustration represents · Sewing machine · Express money · Machine thread · Pressing iron · Scikntific american
Internet Archive · Public domain (published before 1931). Free to use for anything.
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