Ladder gripping attachment patent, 1913

Ladder gripping attachment patent, 1913

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Credit: US PATENT AND TRADEMARK OFFICE/SCIENCE PHOTO LIBRARY

Caption: Ladder gripping attachment patent, 1913. Artwork showing a device invented by Edmond Dennis that allows two people to climb at opposite ends of a ladder suspended in mid-air.The shoe attachment grips to each rung of the ladder by means of a U-shaped hooks. This device was intended for use by circus stunt performers.

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Keywords: 1913, 19th century, american, artwork, circus performance, climbing, design, designs, device, diagram, drawing, engineering, equipment, grip, historical, history, illustration, invention, ladder, ladder gripping attachment, machine, mechanical, north america, old, patent, shoes, stunt, technological, technology, united states, usa, vintage

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