US2265730A - Window scaffold - Google Patents

Description

Dec. 9, 1941'. H. l.. HALL 2,265,730

WINDOW SCAFFOLD Filed Nov. 3, 1939 BYr gli ATTORNEYS.

Patented Dec. 9, 1941 UNITED STATES PATENT OFFICE WINDOW sCAFFoLD Hamid L. HalLKansas city, Mo.

Application November 3, 1939, Serial N0. 302,680

(o1. soi- 27) 2 Claims.

This invention relates to improvements in window scaffolds and particularly to a collapsible window scaffold suitable for use in cleaning windows, etc.

The principal object of the present invention is the provision of a window scaffold having a platform with a bracket hinged to the outer edge thereof and flexible stays for limiting the hinging movement of said bracket relative to the platform, whereby the bracket serves as a strut to rest against the outer wall surface below said platform, and a clamp member adapted to be positioned to engage the inner surface of said wall.

Another object of this invention is the provision of a window scaffold having its parts so connected and arranged that they can be folded together to present a small, convenient pack.

Other objects are simplicity and sturdiness of construction, ease of operation, and adaptability foruse on Walls of various thicknesses.

With these as Well as other objects which will appear during the course of the specication in view, reference will now be had to the drawing wherein:

Figure 1 is a perspective view of a window scaffold shown in the extended position and embodying this invention.

Fig. 2 is a side elevation of the scaffold shown in the operative position on a building structure.

Fig. 3 is a side elevation of the window scaffold in the collapsed position.

Fig, 4 is a sectional view taken on line IV-IV of Fig. 1; and

Fig. 5 is a sectional View taken on line V-V of Fig. 2.

Throughout the several Views, like reference characters designate similar parts and the numeral I0 is a platform comprising a planar member I2 having angle irons I4 secured to its opposite edges. These angle irons extend inwardly beyond member I2 and serve as bearings to rest on the Window ledge.

A tie bar I6 interconnects the angle irons I4 intermediate their ends and the planar member I2 to add rigidity to the platform. This platform could also be made of a single piece of sheet metal, Wood, etc., without affecting its proper functioning as contemplated.

A bracket I8 is hinged to the opposite side of said platform to lugs 20 secured respectively to angle irons I4. The bracket comprises spaced apart struts 22 joined by cross brace members 24 riveted thereto. The inner ends of struts 22 are covered with pads 28 to prevent marring of the wall.`

Stays 30 are provided to interconnect struts 22 with their respective angle irons I4 at points intermediate their ends whereby `the stays are positioned in spaced relation to the supporting wall when the scaffold is in use. While these stays might be made of any material of suitable strength, it has been found convenient to make them of a flexible element, such as a chain, to facilitate easy collapsing of the scaffold.

Similar clamping members 32 are hingedly attached at their one end to each of the angle irons I4. Each clamping member 32 comprises an arm 34 hinged at 36 to angle iron I4 and provided at its free end portion with a longitudinally disposed series of holes 38.

A bracket 40 slidably mounted on arm 34 is disposed transversely thereto and carries a shoe 42 which extends toward the platform and is adapted to engage the inner surface of the supporting wall. The engaging face of the shoe is provided with a soft covering material for protection of the wall or window-casing finish. Shoe 42 is secured to bracket 40 for limited oscillatory movement and there is suflicient friction between the parts to prevent accidental relative movement thereof.

A chain secured at its one end to shoe 42 and at its other end to a cotter key 62, which is adapted to be inserted in one of the series of holes 38 to secure bracket 40 against longitudinal movement relative to arm 34. Also, the cotter key is used for securing the parts in the collapsed position as hereinafter described.

A collapsible railing 44 extends upwardly from the platform and affords ample protection to the workman. This railing consistsof a framework 46 having uprights 48 hinged respectively to brackets 50 carried by angle members I4. This framework 46 is secured in an upright position by diagonally disposed side braces 52 which are hinged at their opposite ends respectively, to the bracket 50 and the platform ID. Each brace consists of two overlapped members pivoted together at 54 and adapted to be secured against relative movement by a bootI 56 which serves as a sheath for the overlapped portions.

Referring to Fig. 3, it will be noted that the scaffold is adapted to be folded into a convenient, compact form for storage and transporta. tion.

'Ihe Cotter key 62 positioned in one of the holes 38 serves to secure the parts against accidental are formed to present wall bearing feet 26 which 55 displacement. When unfolded and positioned as ff r iout the window, as shown in Fig. 3, it Will securely grip the wall, and when the shoes 42 are properly positioned on arm 34, the platform will extend substantially horizontally out from the window. Due to the relative relation of the shoes and the bearing ends of the struts, there is `no tendency for the engaging parts to be dislodged when weight is applied to the platform. A relatively large portion of the weight on the platform rests ori *the Window. Sill as'jc'l'early Ashown :in Fig. 2.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is: l

1. A window scaffold comprising a platform adapted to rest at its one edge on theouteledge.

of a window frame to extend `outwardly,therefrom; a bracket extending 'substantially the ffu'll Width of said platform hingedly carriedadiacent: the nouter edge of., said platformv and adapted to contact the outerL surface kof 'the structu,rial wall. below said" Windovvrlframe; an vadjllfsftable clamping member hinged to said platform having a. horizontally and vertically adjustable shoe adapted to engage the inner wall of said structural member below said Window ledge to secure said platform in a substantially horizontal position; and a railing hingedly secured to said platform for movement relative thereto, adapted to extend along the outer edge and the two sides of said platform and to be collapsed to extend substantiallyparallel therewith.

2. IA' window scaioldf comprising a platform, a bracket hinged to the outer portion and adja- Yycent opposite sides of said platform to extend downwardly therefrom; a stay to limit the down- Ward'hinging movement of said bracket; an arm hinged to the inner portion of said platform; a bracket lslidaloly mounted for longitudinal adjustment on said arm; and a shoe carried by said bracket for limited oscillatory movement relative thereto.V

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