US 1864457 A
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Description (OCR text may contain errors)
June 21, 1932. A. o. NELSON ADJUSTABLE ROOF SCAFFOLD SUPPORT Filed Sept. 9, 1931 Patented June 21, 1932 UNITED STATES ALFRED O. NELSON, F
ADJUSTABLE ROOF Application filed September The present invention aims to provide an adjustable roof scafiold support constructed to accommodate itself to roofs of varying pitch and to support the scaffold board in a position for use, whereby the work of either laying or repairing a roof can be more conveniently and quickly accomplished, and without any danger of stepping upon and marring the roof structure.
Another important object of the invention resides in the provision of an adjustable roof scaffold support capable of being folded into a comparatively small compact article when not in use, and one which requires but a small amount of space in a tool box or the like.
The nature and advantages of the inventlon will be better understood when the following detail description is read in connection with the accompanying drawing, the invention residing in the construction, combination and arrangement of parts as shown.
In the drawing forming part of this application like numerals of reference indicate 0 similar parts in the several views and where Figure 1 is a perspective view showing the manner of using the invention.
Figure 2 is a view of the device folded.
Figure 3 is a fragmentary longitudinal sectional view through Figure 2.
Figure 4 is a sectional view on line 4-4 of Figure 3.
Figure 5 is a sectional view on line Figure 3.
The adjustable roof scaffold support constituting the subject matter of the present invention includes a channel-like base member 10 adapted to repose upon the roof A as shown in Figure 1. Projecting from one end of the base member 10 is a flat attaching strip 11 characterized by a plurality of longitudinally disposed key hole slots 12 adapted to receive nails 13 for securing the device in position upon the roof. A channel scaffold board support 14 is pivoted at one end of the base 10 as at 15, and the free end of this support is adapted to be adjustably received within the channel brace bar 16 pivoted on the opposite end of the base 10 as at 17. The parallel flanges 18 of the channel brace bar are pro- PATENT OFFICE;
9, 1931. Serial No. 561,936.
vided with aligned openings 19 between which the loop 20 carried by the board support 14 is adapted to'be arranged to receive a suitable bolt or pin 21. By virtue of this construction, it is manifest that the board support 14 can be adjusted to occupy different angular positions with relation to the base 10, which permits the device in its entirety to be adjusted and accommodate itself to roofs of varying pitch. The base member 10 has its opposed sides connected by transverse partitions or walls 22 to afiord the base the desired strength and rigidity.
In practice, two of such devices hereinabove described are supported upon the roof A any desired distance apart, and after the supports 14 have been properly adjusted, the scaffold board 23 is arranged upon the supports 14 in the manner illustrated in Figure 1. This arrangement permits the use of a relatively wide board, so that the work to be done can be quickly and conveniently accomplished, without any danger of the workmen stepping upon and marring the roof construction, while the board 23 may also be used as a support for an excess supply of shingles or tools used by the workmen.
The construction also permits the device to be folded into a comparatively small compact article, so that it can be conveniently arranged in a tool chest or the like, occupying but a minimum of space. For this purpose the board support 14 is first separated from the brace bar 16 and then lowered wholly I within the channel-like base member 10. The brace bar 16 is then lowered over the base 10, receiving the latter and lying parallel therewith as clearly shown in Figure 2. The body wall of the brace bar 16 is bulged outwardly adjacent one end as at 24, to provide a finger receiving groove, so that the bar can be elevated, when it is desired to set up the device for use.
While it is believed that from the foregoing description the nature and advantages of the invention will be readily understood, I desire to have it known that I do not limit myself to what is herein shown and described and that such changes may be resorted to when desired as fall Within the scope of what is claimed.
What is claimed is:
An adjustable roof scaflold support comprising a channel-like base member, a flat attaching strip projecting from one end of the base and havin a plurality of nail receiving slots,'a scafiold board support pivoted on one end of the base, a channel brace bar pivoted on the other end of the base and adapted to adjustably receive the adjacent end of said board support, the flanges of said brace bar having spaced aligned openings, a loop carried by the board support and adapted to register with said openings, and a fastening element adapted to be'passed through said openings andloop. ii
In testimony whereof I affix my signature.
ALFRED O. NELSON.