US2467424A - Scaffold supporting bracket for ladders - Google Patents

Description

April 19, 1949. s, HE ET AL 2,467,424

SCAFFOLD SUPPORTING BRACKET FOR LADDERS Filed Aug. 25, 1948 INVENTORS SIMON BUCHER ATT RNEYS JOHN J. JOHNSON- Patented Apr. 19, 1949 UNITED SCAFFOLD SUPPORTING BRACKET FOR LADDERS Simon Bucher and John J. Johnson, Milwaukee, Wis.

Application August 23, 1948, Serial No. 45,606

1 Claim.

Our invention refers to scaffold supporting brackets for ladders.

The primary object of our invention is to provide an adjustable bracket for attachment to the rails of two or more ladders, either upon the inside or outside thereof, depending upon the na- .ture of the Work, as for example in sheet metal jobs or painting jobs, it being understood that the supporting ladders rest obliquely upon a building and that said brackets may be moved up or down, for change of elevation, by the workman while shifting the equipment. Briefly, the brackets may be manipulated by one hand of the workman, while he safely clings to the ladder with the other hand. Thus the entire equipment can be moved up or down without dismantling the entire device and ladders.

A further object of our invention is to provide a rigid V-shaped two-armed bracket, having adjustable U-shaped clips at their inner ends for clamping the ladder rails, the lower member constituting a brace-arm, adjustable as to length, whereby the upper platform receiving rest-arm is positioned horizontally for the support of a platform, irrespective of the angle of the ladders.

A further object of our invention is to provide means for adjusting the length of the brace-arm while the workman rests upon the platform or ladder.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the novel construction, combination and arrangement of parts, substantially as hereinafter described, and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claim.

In the accompanying drawings is illustrated one complete example of the physical embodiment of the present invention constructed according to the best mode so far devised for the practical application of the principles thereof.

In the drawings:

Fig. 1 represents a sectional side elevation of a ladder and bracket embodying the features of our invention, the section being indicated by line ll of Fig. 2.

Fig. 2 is a plan sectional view of the same, the section being indicated by line 22 of Fig. 1.

Fig. 3 is an enlarged detail plan sectional view of the coupling connection between the platform rest-arm and ladder rail.

Fig. 4 is a similar sectional elevation of the coupling connection between the brace-arm and lad- 2 der rail, the section being indicated by line 44 of Fig. 1.

Fig. 5 is a detail cross sectional view through the coupling connection of the rest-arm and ladder rail, the section being indicated by line 55 of Fig. 1.

Fig. 6 is a cross sectional view through the outer ends of the rest-arm and brace-arm connectionsythe section being indicated by line 6-6 of Fig. 1; and

Fig. 7 is a side elevation of the bracket illustrating the same attached to the inside of the obliquely disposed ladder.

Referring by characters to the drawing, A indicates a fragment of a ladder, and B the usual rounds connecting the rails of the ladder.

Mounted upon the ladder is a V'shaped bracket comprising an upper platform rest-arm I and a lower obliquely disposed brace-arm 2. The converging ends of the bracket arms are secured by a hub I' which extends from the end of the rest-arm, and the outer end of the brace-arm is in swivel connection with said hub, having inner and outer end thrust collars 3-3, respective- 1y, abutting the hub.

The inner end of the rest-arm is provided with treads l" and said inner end is in threaded connection with a sleeve 4, which sleeve projects from the inner leg of a U-shaped clip 5, which clip engages the ladder rail A just above one of the rounds B thereof, it being understood that the mouth of said clip is directed towards the outer end of the bracket, whereby it may readily be inserted in coupling connection with the ladder rail. The load strain upon the rest-arm serves to firmly and frictionally grip the ladder rail. Due to the fact that the clip rests upon one of the ladder rounds B, it will absolutely prevent slippage. under load strain.

The inner end of the brace-arm 2 is also threaded, which end is in threaded connection with a sleeve 6, which sleeve extends inwardly from a second U-shaped clip 1 and said clip has an open mouth, the reverse of the first mentioned clip 5, the same extending away from the outer end of the bracket and it abuts the outer face of the ladder rail A. Thus when load strain is put upon the complete bracket, the rail is frictionally gripped by the pair of brackets in opposite directions, whereby slippage of said bracket or brackets is eliminated.

When it is desired to level off a set of these brackets, whereby the platform is horizontally positioned with relation to the angle of the ladder, the workman simply rotates the brace-arm 2 by a spanner pin 2', which is secured to said bracearm. Thus the arm will be lengthened or shortened, due to its threaded coupling connection, between the sleeve 6 and thereafter to lock the same in its adjusted position, a check nut 6', in threaded union with the outer end of the arm, is locked against the associated end of the sleeve 6. The rest-arm I and its associated sleeve 4 connection with the clip 5 may also be lengthened or shortened by rotating the clip member and sleeve upon the end of the arm and thereafter locking the same by a check nut 4', inthreaded union with said arm, except in this instance, the nut will engage the outer end of the sleeve 4.

When it is desired to reverse the position of the platform for painting, or the like, the brackets, as shown in Fig. 7 of the drawings, are in-- serted upon the inside of the ladder supports and to align the brackets horizontally, due to thechange of angle with respect to the ladder, the upper clip connection is run inwardly upon the arm to shorten the length of the rest-arm, while the brace-arm clip connection'is run outwardly to lengthen said arm, whereby the brackets, when properly assembled, support the platform,.indicated in dotted lines, in a proper horizontal position for safety purposes.

We claim: 7

A scaffold supporting bracket for ladder rails,

comprising an upper platform rest-arm havin a threaded inner end, a hub extending from the outer end thereof, an obliquely disposed bracearm revolvably mounted in the hub having a threaded inner end, a U-shaped clip having its mouth directed toward the hub end of the restarm, a threaded sleeve extending from the clip engaging the inner threaded end of said rest-arm, a second U-shaped clip associated with the threaded end of the brace-arm, the mouth of said clip being directed away from the outer ends of the brace-arm, a threaded sleeve carried by said second clip engaging the arm, and means for manually rotating the brace-arm, whereby it is lengthened or shortened to horizontally level up the bracket relative to the angle of the ladder.

SIMON BUCHE'R. JOHN J. JOHNSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 606,763 Lukens July 5, 1898 791,531 Althofi June 6, 1905 1,906,275 Kramer May 2, 1933

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