US447309A - Window-scaffold - Google Patents

Description

Patented Mar. 3,1891.

' INVENTOR. La Mfg Q @acm/ey A. GEHRWALD.

WINDOW SGAFFOLI).

U L? rn/ (No Medel.)

WITNESSLS.

Y shown in Fig. 2.

'NrfTnn' STATES PATENT `muon.

ADOLPI-I GEHRIVALD, OF S'I. LOUIS, MISSOURI.

WINDOW-SCAFFOLD.

SPECIFICATION forming part of Letters Patent No. 447,369, dated March, 1891.

Application iled June l2, 1890. Serial No. 355,167. (No modeh) .To @ZZ whom t may concern:

Be it known that I, ADOLPH GEHRWALD, a citizen of the United States, residing in the city of St. Louis, State of Missouri, have in vented certain new and useful Improvements in Vindow-Scaffolds, of which the following isa full, clear, and exact description.

Myinvention relates t0 devices designed to support a person when working on the walls of a building where it is not convenient or desirable to suspend or support a scaffold from the ground, asin Washing the outside of windows, and has for its object to provide a scaffold suitable to be used with windows of different Widths and adjustable to different thicknesses of walls, and one that can be folded up, so as to occupy comparatively small space when not being used.

It consists in the arrangement and combination of parts, more fully hereinafter described, and afterward pointed out in the claims.

In the accompanying drawings, in which like letters of reference denote like parts in the several figures, Figure I is a front elevation of the device or apparatus as applied to a window. Fig. 2 is a side elevation of the same, and Fig. 3 is a side view of the apparatus folded up. Fig. 4 is a View showing a modification of the retaining device.

I make up my apparatus with arectangular frame A, made up of four pieces, the upper and lower horizontal ones being extended somewhat beyond the margin of the frame, soI as to reach across wide windows, as is sometimes necessary, and yet be suitable to be used with narrow windows. This is placed against the windowcasing C on the inside. To this frame A, I adj ustably pivot the supporting-platform B by a long pivot-bolt b let through holes cut in the lower ends of the uprights of the frame A, and holes c, formed in and across the platform-board B. The ob ject of the several holes c is to permit of an adjustment for different thicknesses of walls by passing the bolt through different holes corresponding with the different thickness of Wall, so that the hinged bracket-pieces D, se-` cured to the under side of the platform-board B, will assume a solid position against the outside of the wall below the window-sill, as To the upper side of the platform B is secured, preferably by hinges, the several parts being also hinged together, so that the apparatus can be folded up, as shown in Fig. 3,-the frame E to act as a protectioirrailing around the platform B.

The railing E consists of two side rails e, connected together at their outer ends by an end rail e and hinged at their inner ends to the platform by hinges m in such manner that it can be folded longitudinally against the platform B. The outer end of the railing is supported when in use above the platform by the supporting piece or post c2, which is hinged at m to the end rail e in such manner that railing and post can be folded against the platform, as shown in Fig. 3. The lower end of the supporting-piece e2 when upholding the railing rests in an aperture or recess n eut in the platform B.

In order to fold the scaffold, as shown in Fig. 3, the supporting-piece e2 is raised oiitof the recess n and moved inwardavhen the railing E can fold down upon the platform, the

brackets D are folded toward each other under the platform, and the rectangular frame A folded upon the platform and railing.

It is obvious that I can, without modifying the essential features of my invention, dispense with the frame A, and instead of putting the retaining-bolt h through the several holes c, I can make a series of vertical holes hin the inside end of the platform-board B, along or near either side thereof and place bolts h through them that will retain the platform in position by coming against the inside of the window-sill, as shown in Fig. 4.

I claim- A l. In a Window-scaffold, the combination, with a rectangular frame adapted to be placed against the inner side of a window-frame, of an adjustable platform pivoted at its inner end to said frame, and laterally-folding brackets on the lowerside of the platform, substantially as and for the purposes specified.

2. In a window-scaffold, the combination, with a rectangular frame, of a pivoted platform adj ustably secured to said frame, aprotection-railing hinged to said platform, and laterally-folding brackets for supporting the platform, substantially as and for the purposes specified. j

3. The combination, in a window-scaffold,

IOO

ment at its inner end, of dependent brackets pivoted at two distant points on the under side of said platform and adapted to fold laterally against said platform, substantially as and for the purposes specified.

In testimony whereof I have affixed my signature, in presence of two witnesses, this 28th zo day of May, 1890.

ADOLPII GEl'IRlVALD.

litnessesz J. W. CRooKEs, J. L. IIoRNsBY.

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