US462934A

US462934A - thibault

Info

Publication number: US462934A
Authority: US
Publication date: 1891-11-10
Anticipated expiration: 1908-11-10

Description

(No Model.) 2 Sheets-Sheet 1.

A. THIBAULT.

PORTABLE SGAFFOLD.

No. 462,934 Patented Nov. 10, 1891.

ARV/A5 TH/BA U1. 7;

lnuani'or,

(No Model.) 2 Sheets-Sheet 2.

A. THIBAULT.

PORTABLE SGAPFOLD.

No. 462,984. Patented Nov. 10,,1891.

R 2 H11 [L I, I H m a SM mhn Am Mm UNITED STATEs PATENT OFFICE.

ARVIAS THIBAULT, on OTTAWA, CANADA.

PORTABLE SCAFFOLD.

SPECIFICATION forming part of Letters Patent No. 462,934, dated November 10, 1891.

Application filed April 22,1891. Serial 110.389.951. (N0 model.)

To all whom it may concern.-

Be it known that I, ARVIAS THIBAULT, a citizen of the Dominion of Canada, residing at Ottawa, in the county of Carleton, in the Province of Ontario, Canada, a subject of the Queen of Great Britain, have invented new and useful Improvements in Portable Seaffolds, of which the following is a specification.

My invention relates to improvements in portable scaffolds such as are used in the cleaning, painting, repairing, or otherwise im-.

proving the exterior surfaces of buildings, and it will be found an especially convenient and valuable help in working at or washing the outsides of house-Windows, where high ladders or scaffoldings would otherwise be required.

It is designed in this invention to provide a cheap, light, and easily-handled scaffold that may be placed in any ordinary window, from which it will project outwardly and form a safe support and standing-platform for either women or men to stand on while performing any of the outside works above mentioned.

Having these objects in view, my invention consists in a light frame of such width as will allow it to pass through an ordinary window and extending both inside and outside a sufficient distance to provide the required standing-platform for the operator and also for the secure bracing of the scaffold inside, all as hereinafter more fully described and illustrated in the annexed drawings, in which- Figure 1 is a longitudinal sectional elevation of the scaffold through its center, showing it in position in a window. Fig. 2 is an inner end elevation of the scaflold, as in Fig. 1. Fig. 3 is a plan view of the scaffold folded up as when not in use or for carrying about; and Fig. 4C is a sectional view on line X X, as in Fig. 3.

The outside floor A and the inside floor B are secured to the oblong rectangular frame 0. This frame is intended to be laid upon the window-sill when the scaffold is in use, and to project outward, as shown in Fig. 1, so that the floor A will afford standing-room for a person working on the outside of the building.

In order to prevent the tilting of the scaffold by the weight of the person standing on its outer end, the inner end is firmly braced vertically in the following manner: An extension-brace D is hinged to the inner end of the scafiold and is in tended to butt against the top of the window-casing inside, or, if found more convenient, against the ceiling of theroom. Owing tothegreatvarietyofheights of ceilings and windows, it. is necessary that this brace should be made extendible endwise, and for this object the brace is made in two pieces fitted to lie together, as shown, one of them being attached to the floor B by the hinge 8, while the other part, sliding endwise on the outer face of the hinged piece, is held to it by the elasps f, which surround both parts and are attached to the hinged part of the brace, while the other part slides freely through them. The outer or extension part is moved by means of the screw g, which lies in a groove formed partly in both parts of the brace and works in a nut 71, fixed in the extension part. A rod or shaft "J is added to the end of this screw. It is provided with a collarj, which faces against an eye-block 7c, fixed in the hinged part of the brace and through which said rod passes. The rod 5 is extended for some distance outside of the eye-block, and has its end portion bent to form a crank, by means of which the screw 9 is turned and the extension part of the brace moved. The end of the screw g butts against a stop Z, fixed in the hinged part of the brace. The legs M, which support the inner end of the scaffold from the floor, are connected with the frame 0 by the pivots 9'2, so that they may be folded up against the floor B of the scaffold when not in use, as shown in Fig. 4. These legs are provided with the extension-pieces 0, which are held to the legs by the clasps P. The extension part slides loosely through the clasp, but may be gripped and held at any point by the setscrew (1, which pierces the inner side of the clasp and holds the extension-piece firmly against the leg.

As further means for preventing the slipping of the extension-piece on the leg, their two contact-faces are tapered in opposite directions, and they are placed together head and point, so that any slipping upward of the wextension-piece would only crowd it tighter against the leg. A short feather formed 011 the contact face of the extensi0n-piece slides in a groove in the contact-face of the leg and keeps the two pieces in line with each other. By these extension devices the scaffold may be made perfectly secure in any window.

To the outer end and two opposite sides of the outer part of the scaffold I provide the guards B. These are attached to the scaffold by means of hinges, so that they may be folded down when not required, as shown in Figs. 3 and 4. These guards are intended as a safeguard against stepping over the edge of the platform while working thereon, and for prex enting articles placed thereon from also falling to the ground below.

The small pinsi in the upper corners of the safeguards are provided to hold the end guard in an upright position, which guard when in such position will thereby hold the side guards in a similar position. \Vhen not in use, these guards will fold down on the platform, and in some cases, as may be required by the different uses to which my scaffold is applicable, the guards may be alt0- gether removed without changing the nature of my invention-such, for instance, when it is required to make an extended outside scaffolding, which can be arrived at by placing two or more of my scaffolds in different windows and placing a ladder crosswise on the outside platforms.

Secured to the frame of the platforms are the lugs. or projections s, which are intended to hold against the outer edge of the windowsill, and thereby prevent any inward slipping of the scaffold.

Having fully described my invention, what I claim, and desire to secure by Letters Patent,

1. A portable scaffold comprising a frame 0, carrying a floor, and the brace D and legs M, pivoted, respectively, to the upper and. lower faces of the frame 0 at the inner end of the latter.-

2. A portable scaffold having the floors A and B, secured to the frame C and provided with an extendible brace D, composed of two parts, one of them hinged to the floorB and the other to an extension-piece sliding upon said hinged part through the clasps f and provided with screw g, nut '11, collar j, and eyeblock 7a, as set forth.

3. In a portable scaffold, the extension-legs M, pivoted to the frame C, having the ext-ension-pieces 0, held to the legs by the clasps P, with their set-screws as described, and for the purposes set forth.

4:- A portable scaffold comprising a floored frame 0, a brace D, pivoted to the upper face of the frame at its inner end, and the guards R, hinged to the upper face of the frame at its outer end, the Whole being adapted to be folded into compact form for handling, substantially as shown.

In witness whereof I have set my hand in the presence of two Witnesses.

ARVIAS 'IHIBAULT.

Witnesses:

FLAVIEN MOFFET, ED. AULE.