1851 Great Exhibition: Official Catalogue: Class VII.: George Ell

94. ELL, GEORGE, 3 Tottenham Court, New Road — Inventor and Improver.

Adjustable scaffold observatory or fire-escape, applicable to a variety of purposes, and may be adjusted to any height within its range, supporting itself with safety, independently of any attachments.

The machine consists of a series of hollow rectangular frames, sliding one within another, after the manner of the tubes of a telescope; mounted upon wheels, and hoisted or lowered by ropes and pulleys, by means of winch handles, turning a barrel, round which are twisted the lower ends of the ropes of the second frame. By a repetition of this arrangement each frame is raised out of the frame below it, at an equal rate with all the others, but the absolute velocities of all the frames successively are in arithmetical progression.

Adjustable ladder; supports itself by means of swinging poles attached to the back, braced by light iron work; can be easily taken to pieces, and put away in a small compass.

Wheelbarrow, for the use of excavators and others.

Folding steps, with bowed sides, suitable for general household purposes.

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