US1691678A - Window scaffold - Google Patents

Description

Nov;13,192s. 1,691,678-

S. G. SWANLIND WINDOW SCAFFOLD Filed Apri s 7 5. E1. Ewanawn Patented Nov.- 13, 1928.

PATENT oFFIc.

SVEN GUNNAR SWANLIND, OF CHICAGO, ILLINOIS.

wmnow SCAFFOLD.

Application filed April 6, 1927. Serial No. 181,4.

The invention relates to scaffolding de signed chiefly for windows and provides an article assuring safet to the user and capable of being readily han ed and adjusted by one person.

The invention furthermore aims to devise an article of the general nature stated which is light, strong, durable and adapted to be marketed at a small cost.

While the drawing illustrates a preferred embodiment of the invention, it is to be understood that in adapting the means to meet specific needs and requirements, the design may be varied and such other changes in the,

minor details of construction maybe resorted to within the scope of the invention as claimed, Without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawing hereto-attached, in which,

Figure 1 is a top plan view of a window scaffolding embodying the invention, and showing the same in operative position, the window being in section.

Figure 2 is a detail sectional View on the line 22 of Figure 1, looking in the direction of the arrows. i V

Figure 3 is an enlarged detail, sectional view on the line 3-3 of Figure 2.

Figure 4 is a detail View showing'a different arrangement.

Corresponding and like parts are referred to in the following description and designated in the several views of the drawings by like reference characters.

The scaffold includes two complemental bars 1 which are disposed in spaced parallel relation. Each of the bars 1 is provided along an end with a plurality of openings 2. A

cross piece 3 connects the bars 1 at one end and constitutes a guard. A hanger 4 of substantially U-shape is dependent from an end portion-of each of the bars 1', and has the upper portion of its inner leg offset inwardly, as indicatedat 5, to provide a rest for engaging the outer sill 6 of a window, thereby providing supporting means'for holding the scaffold level. A staging or platform 7 engages the lower portion of each of the hangers 4 and is preferably secured thereto for safety. The upper ends of the legs of the hangers are outturned to underlap the'bars l and are bolted,

or otherwise secured thereto, the outer bolts 8 also serving to secure the cross-piece 3.

A cufi' 9 is adjustable upon an end portion of each of the bars 1, and is held in the required adjusted position by means of a pin 10 passing through openings in opposite sides of the cuff and through one of the openings 2 of the bar 1. A hook 11 is provided for each of thecuifs 9 and is adapted to engage under the stool 12 of the window and retain the scaffold in place. The cuffs 9 may be formed of a metal strap bent into loop shape and having the ends overlapped and secured by means of a bolt 13 or analogous fastening. The shank of the hook 11 is secured to the cuff by the fastening 13, and is confined be tween the lower side of the bar 1 and the lower end of the cuff, as indicated most clearly in Figure'3 of the drawing.

When the scaffold is properly positioned in a window,the inner ends of the barsl rest upon the stool 12 and the hangers 4 are disposed outwardly from the sill 6 with the parts 5 resting upon the sill, thereby holding the bars 1 in horizontal position. The cuffs 9 are positioned to enable the hooks 11 to engage under the inner portion of the stool 12 and in consequence displacement of the scaf- 7 fold is prevented, and the lower portion of the window is comprised between the hangers 4 upon the outside and the hooks 11 upon the inside. 'Inward displacement of the scaffold is prevented by the hangers 4 eng ing the outer side of the sill 6. Qutwardisplacement of the. scaffold is prevented by the hooks- 11 engaging the stool 12. Tilting of the scaffold is obviated by the rests 5 engaging the upper side of the sill 6, and the hooks 11 engaging'under the inner portion of the 'stool 12. If need be, blocks or shims may be interposed between the sill 6 and the rests 5, whereby to level the scafi'old or elevate the outer portion thereof slightly. The scaffold may be easily and quickl removed from a window by with drawing t e pins 10 and slidin the cuffs 9 on the inner ends of the bars 1, t er eby withdrawing the hooks 11 from engagement with the stool 12, when the scaffold may be easily lifted from the window.

In the arrangement shown in Figure 4 the openings 2 are closer together and the wife 9 are inverted to bring the hooks 11 uppermost and a member 14 spanning the window is engaged by the books. This arrangement is necessary when the stool of the window does not project to be engaged by the hooks 11.

Having thus described the invention, I claim:

5 A window scafiold comprising two parallel bars of a length to project beyond opposite sides of a window sill, and having the inner end portion of each bar provided with a plurality of openings, a U-shaped hanger de- 10 pending from the outer end portion of each of the bars and having its inner leg offset to provide a sill rest, a cross bar connecting the outer ends of the parallel bars and forming a guard, a staging connecting the lower portions of the hangers, cufi's adjustable on the 15 inner ends of the parallel bars, pins ada ted to ass through openings in thesides o the cu s and selected openings of the parallel bars to secure the cuffs in the required adjusted position, and hooks carried by the cuffs 20 to engage the stool of the window.

In testimony whereof I afiix my signature. l

SVEN GUNNAR SWANLIND. [1,. 8.

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