US710861A - Scaffold-bracket. - Google Patents

Description

No. 7|D,86l. Patented Oct. 7, |902.

F. HAAS.

SCAFVFOLD BRACKET.

Y (Application filed Julyv 26, 1901.)

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UNTTnn STnTss FREDERICK HAAS, OF BALTIMORE, MARYLAND.

SCAFFOLE B RAC KET.

.SEECIFICATION forming part of Letters atent No. 710,861, dated October '7, 1902,

Application led July 26,1901.

T0 all wtovt t Wtcty concern:

Beit known that LFREDERIOK Hans, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented new and useful Improvements in Scaffold- Brackets, of which the following is a specilication. v

This invention relates to scaffold-brackets; and the primary object thereof is to provide a simple and efficient means for holding swinging scaffolds a suitable distance away from the sides of a building on which they are rigged.

A further object is to provide a device which may be readily attached to and detached from the ladder which forms the scaffold.

The construction embodied in this device will be fully described hereinafter and illustrated in the accompanying drawings, in which- Figure l is a perspective view of a swinging scaffold to which the invention is applied. Fig? is aperspective View of the bracket-arm, showing the bolt and thumb-nut detached. Fig. f3 is a similar view of a detachable clamp therefor.

Referring now to the drawings by numerals ofreference, l designates the bracket-arm, at one end of which is a curved extension 2, terminating in a hooked end 3. The other end. of the arm is bifurcated, as at e, and is provided with coinciding holes 5, through which lits the bolt 6, adapted to receive a thumbnut 7 on its threaded end, as will be explained hereinafter.

In Fig. 3 l have illustrated a preferred form of clamp, which may be of the common type used in the trade of carpentry and which is approximately U-shaped, having a rigid jaw S and a movable jaw S) for clamping the ladder. The longitudinal edge of said clamp' is provided with a plurality of holes lO and is of sufficient width to fill in the space between the bifurcated arms le of the bracket-arm l. The holes l0 are arranged along the entire length of the clamp, and the bolt 6 may be inserted in the holes 5 and through any one of the holes lO to secure the clamp in place, as occasion may demand.

In actual practice two of these devices will Serial No. 69.841. (No modela be applied, the hooked ends 3 being placed in engagement with the window-frame between the brick wall and frame. The arm l will extend a snllicient distance out from the wall of the building to hold the ladder against swinging against the walls and in such amanner that the workmen may conveniently apply the paint or other material to the side walls of the building. One side of the ladder will be clamped between the rigid and movable jaws S and El, and the danger resulting from the use of swinging scaifolds will be materially diminished. By operating the flat head ll of the screw l2 of the movable jaw 9 the device may be readily detached from engagement with the ladder and the hooked ends then removed from engagement with the sash in the event that it is desired to adjust the scaffold either to a higher 0r lower plane. It will thus be seen that the device may be easily and readily applied and may be conveniently removed without requiring eX- tra tools.

`Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-

l. In a device of the character described, the combination with a clamp having a longitudinal edge, of a bracket-arm having a bifurcated end adapted to embrace the longitudinal edge of the clamp, and means for adjustably securing the bracketarm to the clamp. Y

2. In a device of the character described, the combination with a clamp havingits longitudinal edge provided with a series of holes, of a bracket-arm having a hooked end and a bifurcated end adapted to embrace the longitudinal edge of the clamp, the arms of the bifurcated end being provided with holes to register with the holes in the clamp, and means for adjustably securing the bracketarm to the clamp.

In testimony whereof I affix my signature in presence of two witnesses.

FRED. HAAS.

Witnesses:

CHAs. L. Wine-AND,- HENRY C. RoRnAoi-r.

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