US869127A - Window-scaffold. - Google Patents

Description

N0.869,127. PATBNTED-0GT.22.1907.

N. AUBUCHUN. WINDOW SCAIFOLD.

APPLICATION FILED 0 0T.127. 1906.

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UNITED sTATEs PATENT oEEioE.

, NAPOLEON AUBUCI-ION, OF ST. LOUIS, MISSOURI, ASSIGNOR TO JOHN II. MUIR, OF ST. LOUIS, MISSOURI.

WINDOW-SCAFFOLD.

Specification of Letters Patent.

IBatented Oct. 22, 1907.

Application filed October'27. 1906. Serial No. 340,910.

To all 'whom it may concern:

Be it known that I, NAPOLEON AUBUoHoN, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented new andA useful Improvements in W indow-Scaffolds, of which the following is a specification.

This invention relates to an improved window bracket or scaffold, designed to provide a platform at the exterior of the window on which a person may stand while painting, cleaning windows and performing like work. i

The object of the invention is to provide a simple, inexpensive and efficient device of this character which is adapted to be folded in close compass for storage or transportation and to be adjusted to suit windows in which the sills vary in thickness or project to a greater or less extent beyond the wall, and which is braced to strengthen the parts thereof.

In the accompanying drawing-Figure I is a side elevation of a scaffold bracket embodyingr the invention. Fig. 2 is an outer end elevation thereof. Fig. 3 is a top plan view. Fig. 4 is a detail cross section on line lill of Fig. 3. Fig, 5 is a view of a modified form of brace for the hinged legs.

The device comprises a frame embodying parallel side bars I, upon the outer ends of which are laid and secured a series of cross slats forming a platform 2. The bars l carry parallel supporting bars 3 arrangedupon the inner side thereof, said bars 3 being fitted to slide in guides 4 fixed to the bars I. employed to secure the bars 3 in adjusted position, each consisting of upper and lower clamping members 5 and G engaging the upper and lower edges of the bars in rear ofthe guides 4, said members being connected by a bolt 7 extending downward through recesses formed in the meeting faces of the bars. In this operation, the bolts permit a sliding adjustment of the bars 3 to the limit afforded by the length of the recesses in the meeting faces of the bars, which produce slots through which the bolts project, as will be readily understood.

The upper end ofthe bolt is fitted with a thumb nut 8, by which the clamping members 5 and 6 may be loosened to permit adjustment of the supporting bars 3 and tightened to clamp said bars in adjusted position. The inner or free ends of the bars 3 are provided with depending stops 9 adapted to bear against the inner side of the wall or sill of the window to hold the scaffold from outward movement. By the adjustable connection of the bars 8 with the bars I the scaffold is made longitudinally extensible for application to window sills of different thicknesses or which extend to a greater or less extent beyond the surface of the wall.

The outer end of the scaffold is supported by inclined legs I0, having their lower ends beveled to abut against Clamping devices are the exterior wall of the building and hinged at their upper ends to the'outer ends of the bars I, as indicated at ll, the upper ends of said legs being also beveled to bear against the undersides of the bars to reinforce and hold said legs against outward movement. The free end of each leg is connected with the adjacent bar I by a pair vofpivoted braces I2, the meeting ends of said braces being pivotally connected, as indicated at I3. The upper end of the upper brace and lower end of the lower brace are pivotally attached respectively to the bar I and leg l0 by bolts I4 and I5, such connection permitting the braces to be extended vertically in longitudinal alinement te reinforce and stay the bearing ends of the legs, as well as to permit said braces to swing outwardly on their pivotal connection I3 to adapt the legs I0 to fold against the bars I, thus adapting the device when the legs are swung inward and the bars slid outward in the guides 4 to be contracted, so that it may be packed or stored in close compass.

The legs I() are connected at their lower ends by a cross piece IG and above the same with cross braces I7. U-shaped straps I8 are fastened to the outer ends of the bars l having their lower ends depending therefrom on opposite sides of the upper hinged end of each bracket toA form aguide therefor. This guide adapts the legs to swing in a true plane and prevents lateral oscillation thereof on the hinge ll, thus strengthening and reinforcing the hinged connection to a material extent.

In the use of the device, the bars I and 3 are extended across the window sill, the stops 9 arranged to bear against the inner face of the sill, the legs I0 unfolded and the scaffold adjusted as to length to suit the width of the sill by adjusting the bars 3 in the guides 4, thus bringing the lower ends of the legs I() to bear against the outside of the wall of the building. The clamping screws 8 are then tightened to rigidly con nect the parts of the scaffold, and the platform 2 will accordingly project to form an exterior support.

As shown in Fig. 5 the outer ends of the braces I2 may be formed with hooked portions 12/ to engage the respective bolts I4 and I5, thus adapting said braces to be detached when the scaffold is folded. Preferably the .bars I are provided with a plurality of spaced openings 20 for the reception of the bolts I4, while the lower braces l2 and the legs I0 are similarly provided respectively with a plurality of openings 2l and 22 for the reception of the pivot bolt I5. This construction per mits the braces to be adjusted for connection with the legs to adapt the latter to be swung outwardly to a greater extent when the scaffold is supported upon window sills jutting greater than a normal extent be yond the wall of the building.

The scaffold may be made of wood or metal, or the braces and fastening elements alone may be made of metal and the remaining parts of Wood, the construction in either case being simple enough to permit of the manufacture of the device at a low cost.

The adj ustability oi the structure adapts it to be readily used as a Window scaffold on buildings having sills varying greatly in Width, thus increasing its range of usefulness and practical efficiency.

Having thus described the invention, What is claimed as new, is:-

'llie l1ereindescribed scaffold-bracket comprising a supporting frame consisting of parallel side bars having' connecting members at their outer ends forming o. platform, inwardly projecting' guide loops upon said side bars, sliding supporting hars arranged on the inner sides of said side lmrs :1nd engaging the guide loops, clamping members enlbracing the bars in rear of thefguides, bolts extending between the bars and connecting the clamping members and provided with nuts for adjusting said clamps to secure the supportingbars in adjusted position, stops carried by the inner ends of the supporting bars, legs hinged at their upper ends to the side bars at a point in rear of the outer ends of the latter, pairs of folding braces :it opposite sides of the device pivotnlly connected to euch other and to the side bars and to the leg-s, and guides secured to and de pending from the outer ends of the side bars beyond the hing-es of the legs to engage and stay the hinged ends of the legs from lateral movement.

In testimony whereof, I affix my signature in presence ol two witnesses.

NAPOLEON AUBUCHON. Witnesses EDWARD SMITH, EDWARD HERRMANN.

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