US151150A - Improvement in scaffolds - Google Patents

Description

UNITED JOHN MURRAY, OF BRUNSWICK, MAINE.

IMPROVEMENT EN SCAFFGLDS.

Specification forming part of Letters PatentNo. E5 g, dated May 19, 1874 applica tion filed March 2e, 1874.

To all whom it may concern:

Beitkuown that I, JOHN MURRAY, of Brunswick, in the county of Cumberland and State of Maine, have invented anew and valuable Inlprovement in Builders7 and Painters7 Staging 5V and I do hereby declare that the following is a full, clear, and exact description ofthe construction and operation of the saine, reference being had to the annexed drawings, making a part ot' this specification, and to the letters and gures of reference marked thereon.

Figure 1 of the drawings is a representation of a sectional view of my staging. Fig. 2 is a front, and Figs. 3 detail, views of the saine.

This invention has relation to stages or supports for painters and builders; and it consists in combining, with extension -ladders and hinged props therefor, a horizontal stage or platform and adjustable supports, as will be hereinafter explained.

In the annexed drawings, A A designate the lower portions of two extension-ladders; and a a are the sliding sections, which are connected to the lower sections by means of clasps c c, and sustained at different heights by means ot' hooks d cl. B B designate eXtension prop-ladders, which are respectively composed of twosections put together, and sustained by hooks and clasps, as described forthe main ladders A A. The upper ends ofthe upper prop-sections are connected to the upper ends ofthe lower sect-ions of the main ladders by hinges or pivots p,- so that the base of each ladder can be extended or contracted, as circumstances require. To prevent the lower ends ofthe ladders and props from spreading when erected, I employ tie-bars or braces c c, having hooked ends, which are hooked over the rounds of the main ladders and their props, as shown in Fig. 2. To prevent the ladders and props from falling laterally, I employ in clined props g g, which are hooked to the lower section of the main ladders and spiked to the ground. These props are detachable from their ladders. O designates a horizontal stage, which may be of any suitable length and width, and which is designed to afford a support for persons working on a building. rIhe ends of the stage are sustained bymeans of cross-bars It li, which are supported upon the rounds of t-he ladders and their props, and which may be located at different heights from the ground. rIhis stage O is also supported at the middle of its length by means of an adjustable pin, t, applied to a vertical post,l D, which latter passes through the stage, and rests upon the ground between th e ladders. prevent the stage from sagging, and will hold it steady when persons are at work on it.

Then the ladders are not in use, they can be shortened and folded into a sniall compass for transportation.

lVhat I claim as new, and desire to secure by Letters Patent, is-

The vertically-adjustable stage O, supported by erossbars h 7L on the rounds of ladders, and by an intermediate post, D, in combination with folding ladders and props, substantially as and for the purposes described. Y

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

JOHN MURRAY. lllitnesses N. T. WVORTHLEY, J. H. LOMBARD.

rIhis post D will

Images