US1020358A - Builder's scaffold. - Google Patents

Description

' 0. KNOERZER.

BUILDER'S SOAFPOLD.

APPLICATION FILED JULY 24, 1011.

1,020,358, Patented Mar. 12, 1912.

UNITED STATES PATENT OFFICE.

OTTO KNOERZER, OF HAMMOND, INDIANA, ASSIGNOR T0 CHAMPION POTATO MACHINERY COMPANY, OF HAMMOND, INDIANA, A CORPORATION OF INDIANA.

BUILDERS SCAFFOLD.

Specification of Letters Patent.

Patented Mar. 12, 1912.

Application filed July 24, 1911. Serial No. 640,109.

To all whom it may concern:

Be it known that I, O'r'ro Knouuznn, a citizen of the United States, residing at Hammond, in the county of Lake and State of Indiana, have invented new and useful Improvements in Builders scaffolds, of which the following is a specification.

This invention relates to builders scaffolds, and more particularly to the brackets of that form of builders scaffolds commonly employed in the erection of frame buildings.

As is well known to those skilled in the art to which this invention pertains, temporary scaffolding is erected at the sides of a building during its course of construction, said scaffolding affording a platform for supporting the carpenters that perform work on the outside portion of the building.

One of the objects of this invention is to provide a simple metal bracket of substantial construction, that can be readily secured in place upon the sheathing of the building, and which, when so attached, will be held securely in place.

Another object is to provide a bracket that can withstand the usual rough usage to which devices of this class are occasioned.

Another object is to prevent side sway of the bracket when secured upon a building.

Another object is to provide a form of bracket so arranged that a pair of them can be readily assembled to form a bench support that may stand upon the ground.

With these and other objects and advantages in view, this invention consists in the several novel features of construction and arrangement hereinafter described and particularly set forth in the claims.

The invention is clearly illustrated in the accompanying drawing, in which,

Figure 1 is a perspective view of a bracket embodying one form of my invention; Fig. 2 is a side view thereof showing the same secured in place upon a fragment of a wall, the sheathing of which is shown in cross section; Fig. 3 is a rear view of the bracket, and Fig. 4c is a plan thereof.

Referring to said drawing the frame of the bracket will be seen to comprise a right angle bracket structure 10, having a vertical leg 11, and a horizontal leg 12,both preferably constructed of angle iron a nd braced by an angle plate 13, secured in the angle of the bracket and further by a diagonal brace 14, extending substantially to the middle of the legs. The angle plate and brace are preferably riveted to the legs to make a strong and substantial construction.

The rear end of the top flange of the horizontal leg projects beyond the vertical leg as shown at 15, and is bent downward into a hook like formation 16, said hook being arranged to hook over one of the sheathing boards 17, of the wall. Pivotally and slidably secured in the top flange of the horizontal leg is an anchor hook 18, that projects far enough beyond the hook 16, to hook behind a studding 19, of the wall, to form a double securing means for the bracket. The pivotal end of the anchor hook 18, is bent downward as at 20, and two holes 21, 22, are provided in the top flange of the horizontal leg 12, into either of which the bent end 20, may be inserted, depending on the width of the studding. To accommodate the anchor hook to a 2 by 4t studding, the bent end 20,is thrust through the hole 21, and to accommodate a 2 by (3 studding, it is thrust through the hole 22. A small hole is formed at the end of the bent end, through which may be passed a retaining device such as a cotter pin, nail or the like 24. lVhen not in use, the anchor hook may he slipped down through the hole, as shown in dotted lines in Fig. 2. I profor to slightly flatten the corner 25, of the anchor hook to give it added strength at this point, and further to prevent it from slipping through the hole when swung into its inoperative position.

Pivotally secured on the rear side of the vertical leg is a steadying bar 27, which in its operative position, extends transverse to the plane of the bracket and furnishes a wide bearing against the wall upon which the bracket is secured, thereby preventing sidewise swing of the bracket. The pivotal point of the bar is located on one side of its center, so that one arm 28, is longer and consequently heavier than the other arm 29. A stop, here shown in the form of a pin 30, secured in one flange of the vertical leg 11, acts as an abutment against which the bar is held by reason of the fact that the heavier arm 29, tends to swing the lighter one upward, and said stop is so placed that the bar is held horizontal when in its operative position. The pivotal connection between the vertical leg and bar is shown in the form of a rivet 31, passing therethrough and located under and to one side of the stop 30. lVhen not in use the bar may be swung into the vertical position shown in dotted lines in Fig. 3.

The outer end of the horizontal leg is bent upward to provide a ledge or stop 32, to guard the planks or boards carried by the bracket, from being pushed over the end thereof.

In use, a number of the brackets are secured in horizontal alinement upon the wall, and planks or boards laid thereupon to form a scaffolding. If desired, two brackets may be set side by side on the ground with the Vertical leg of one placed at the free end of the horizontal leg of the-other, and the two secured together to form a supporting frame upon which may be placed one end of a plank or board to provide a bench or bottom scaffold. I have shown holes 38, in the vertical flange of the horizontal leg. In form ing a supporting frame, the holes in the two brackets may be brought into register, blocks of wood placed against the horizontal arms and nails driven through the blocks and holes to clamp the two brackets together.

I realize that various alterations and modifications of this device are possible without departing from the spirit of my invention, and I do not therefore desire to limit myself to the exact form of construction shown and described.

I claim as new and desire to secure by Letters Patent:

1. A metal bracket of the class described, comprising a horizontal angle iron bar, terminating at one end in a downturned hook for engagement with a sheathing board, an upright, downwardly projecting angle iron bar rigidly secured to said horizontal bar adjacent its hooked end, a diagonal brace, rigidly secured to said angle iron bars, and an anchor hook, having one hooked end for engagement with a studding located behind said sheathing board, and having its other end bent down through a hole in the horizontal angle bar, and there provided with means to prevent its accidental withdrawal, said hook being capable of lying in an operatively connected position in a horizontal plane, and of being swung into a vertical plane and moved down through the hole so as to lie within the space occupied by the other members of the bracket.

2. Ametal bracket comprising two bracket members, one having a hook-like formation, whereby the bracket may be detachably secured upon the wall of a building, a steadying bar pivotally secured between its ends upon the other member in aplane at right angles to the plane of the bracket members, with its pivotal point located to one side of its center, and a stop secured to the bracket member upon which said bar is pivoted and acting to hold said bar in a horizontal position transverse to the plane of the bracket, and against the action of its heavier end and thereby form a wide hearing for the bracket, and capable of being moved into the same plane as the bracket members.

In witness whereof, I have hereunto subscribed my name at Hammond, Lake county, Indiana, this 17th day of July 1911.

OTTO KNOERZER.

lVitnesses:

LEONARD KNOERZER, CLAUDE I-I. LASATER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G.

Images