US1325229A - Window-scaffold - Google Patents

Description

C. W. BRAUND.-

WINDOW SCAFFOLD. APPLICATION FILED APR.23.19 18.

1,325,229.. Patented 960.16, 1919.

CHARLES W. BRAUND, OF CLEVELAND, OHIO.

WINDOW-SCAFFOLD.

Specification of Letters Patent.

Patented Dec. 16, 1919.

Application filed April 23, 1918., Serial No. 230,320.

To all whom it may concern:

Be it known that 1, CHARLES W. BRAUND, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Window-Scaffolds, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings.

This invention relates to window scaifolds and has for its objects the provision of such scafi'olds of simple construction, which may be very light and capable of being cheaply manufactured. Another object is to so construct the scafi'olds that they may be quickly and securely adjusted to the construction of the Window sills and building walls, may maintain an adjustment with security and may avoid injuring the surfaces with which the scaffold contacts.

My invention is hereinafter more fully described in connection with the accompanying drawings. Other objects of a. more- In the drawings, Figure 1 is a side elevation of my scaffold in position; Fig. 2 is an end elevation of the same, looking inwardly toward the wall engaging parts; Fig. 3 is a side elevation of the scaffold removed and folded; Fig. 4 is a detail of the connection between one of the brace members and the bar engaging the outside wall; Fig. 5 is a detail of the joint of the brace arm for the guard rising from the platform; Fig. 6 is a sectional detailshowing the device for attaching the chain to the brace arm; Fig. 7 1s a cross sectional detail on the line 7-7 of Fig. 1.

Describing the invention by the use of reference characters, 1 indicates a platform, formed of one or more boards having their ends fitted into parallel angle irons 3, curved as indicated at 4, one of the flanges of the angle irons being out free from the other and turned inwardly and secured to a transverse bar 5 adapted to engage the interior of a'wall B by a suitable screw or bolt indicated at 2. The bars 3 are made of very light angle iron and are rovided on their undersides with longitudinal strips 6, of suitable fibrous material, preferably hard Wood.- These strips are bolted, riveted or otherwise secured to the horizontal flanges of the angle bars 3, thus serving to very materially strengthen these bars without adding appreciably to the weight of the device. When in use these strips rest upon the window ledge A, avoiding marring of the ledge. I have found by tests that the angle bars 3 may be strong enough for safety when these bars have substantially only half of the weight that such bars are required to have when the strips 6 are not used. The vertical flanges of such light weight angle bars are sufliciently strong to retain the board or boards constituting the platform securely in position against longitudinal movement, while the strips added to the horizontal flanges have the double function of providing additional-strength where most needed and serving as buffers to protect the window sill.

Secured to the vertical flanges of the bars 3 by bolts indicated at 10, are brace bars 12, the lower ends of which are bent inwardly and secured by bolts 14 to the transverse bar 15 connecting the ends of the two bars 12 and adapted to engage the exterior of the Wall B.

Formed in the bars 12 are a series of openings 16. These openings 16 are adapted to receive a bolt 20, the shank of which may pass through one link of a chain 22 while its threaded end receives a suitable nut, preferably a thumb nut, as shown at 21. A split spring washer 24 is used and a lip turned outwardly sharply as at 25 engages the inner face of the nut, thereby avoiding danger of loosening the nut when the scaffold is in use.

A guard in the nature of a fence is formed around three sides of the platform 1 and is preferably constructed as follows:

Pivotally secured by rivets 30 to the upturned flanges of the angles 3, are the ends of a small rod 31 formin an inverted U and extending rearwardly om the pivots a short distance and then upwardly and integrally connected by an intermediate horizontal portion 32. Below the portlon 32 is a transverse bar 33 having downwardly turned ends lying along the upright portions 31 and secured by rivets 35. These .rivet pins extend outwardly through the bar 31 and through ends of bars 36, substantially parallel with the angle bars 3 and leading to upright bars 38 of substantially the same height as the upright portions 31 and having offset portions at the lower end secured by tion, it will be seen that I'have provided bars parallel with the sides and outer end of the platform 1 and a sufficient distance above the same to form an effective guard for the occupant of the platform.

To eflectuallybrace the guard structure while permitting it to fold to a position substantially parallel with'the platform and closely adjacent thereto, I have provided toggle arms 41 and 42, the arms 41 being pivoted at 63 to the forward ends of the bars 36 by rivets or pivot pins extending through the arms 41 and bars 36 and 38, and also pivoted to the bars 42 by the intermediate pivot pin 45. The arms 42 extend, past the pivot pin and overla the bars'41 and are provided with inwar ly turned lips 43, limof the scaffold when in use.

The adjustment provided by the bolts 20 and various openings 16 allows the brace bars 12 to assume diiferent angles with relation to the bars 3, thus permitting adjustment of the device for varying thicknesses when the nuts 21 are once firmly screwed to position, the lip 25 eliminates the danger-of these parts becoming loosened which might result in the fall of the'occupant.

' Without loosening or changing any of the parts of the structure, it may be folded to the position shown in Fig. 3, it being only necessary to manuallv move the toggle arms 41 and 42 upwardly out of a straight line,

place to place.

The pads on the bars 5 and 15 are made of considerable thickness and of comparatively short lengths and placed near the ends of j the bars, accomplishing the desired results of savin material from which the pads are made, as well as holding the intermediate portion of the bar away from the wall thus providing contact with the wall at separated points whereby unevenness in the wall does not cause an unsteadiness of the scaiIold.

Having thus described my invention, what I claim is In a window scaffold comprising a plat form and bracing bars, spaced light angle bars supporting the platform, and bent at their inner ends to form hooks of comparatively large curves, strengthening strips of wood rectangular in cross section extending substantially from the outer ends of the angle bars to the curves, and having their inner ends cut away to fit into the curves of the hooks, said strips being secured tightly to the under side of the horizontal flanges of said angle bars whereby they brace and strengthen said bars and act as buffers to protect the window sill.

In testimony whereof, I hereunto afiix my signature. 1

CHARLES w. B iJND.

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