US1701347A

US1701347A - Ladder scaffold bracket

Info

Publication number: US1701347A
Application number: US189438A
Authority: US
Inventors: James B Wardle
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-05-06
Filing date: 1927-05-06
Publication date: 1929-02-05
Anticipated expiration: 1946-02-05

Description

Feb. 5, 1929. 1,701,347

J. B. WARDLE LADDER S CAFFOLD BRACKET Filed May 6, 1927 [IIVQITZtO/i James B. Weird/e.

PATENT JAMES B. WABDLE, TORONTO, ONTARIO, CANADA.

FFICE.

I LADDER SC'AFFOLDIIBRACKE'I;

, Application filed Kay 6,

The principal objects of the invention are to devise an-improved form of bracket for supporting temporary scaffolds from ladders which will be exceptionally strong and rigid and may be manufactured at very'moderate cost.

Further objects are to devise a bracket which may be easily and quickly attached and adjusted to either side of a pair of ladders when said ladders have been set at a proper angle to a wall or structure and which will supported therebetween.

- upper extremities bent to form safely support a planking. j

The principal features of the invention consist in the novel construction and arrangement of parts whereby a pivotal platform support is adj ustably carried on a rigid frame structure adapted to fit between the of a ladder and which is provided with hook members arranged at the top and bottom adapted to engage the ladder rungs.

In the drawings, Figure 1 is a side eleva tional view of my improved bracket shown arranged upon a ladder set to a Wall, the bracket being supported between the wall and ladder and supporting the scaffold planking.

Figure 2 is a perspective view of the bracket showing the ladder in dotted lines, the bracket being supported on the outer side of the'ladder.

Figure 3 is an elevational View of the bracket. f

WVhen exterior or interior repair or decorating work is required it is expedient to use a scaffold which may be readily placed in position and moved fromplace to place and various forms of scafioldbrackets have been devised for such use, brackets being placed on two ladders'and the scaflold planks being The main portion of my improved bracket is formed of twosections 1 and 2, preferably formed of fiatsteel bars having their the hooks 3 and adapted to embrace a rung 4 of a ladder 5. The lower ends 6 of the bars 1 and'2 are curved inwardly and the extremities thereof are bent laterally to form a pair of lugs 7 A pair of looped brackets 8 are rigidly secured one to each of the bars land 2 at their upper ends on the side remote from the hooks 8 and a bolt 9 extends through said brackets connecting the upper ends of the bars 1 and 2.

' A flat bar 10 bent into U shape and having its ends pivotally supported on the bolt 9 beside bars 1927 Serial No. 189,438.

tween the bars 1 and 2 forms the pivotal platform sup'po'rt,the ends of said support'being held against the inner edges of the bars 1 and 2 by a pipe spacing member 11 encircling the central portion of the bolt.

The outer or closed end of the pivotal support is bent to form a slotted extension 12 and a flat bar 13 pivotally' secured to a bolt 1 1 secured in the lugs 7 of the bars 1 and 243K- tends upwardly into said slot and is ad'- justably secured by the bolt 15, the bar 13 being provided with a plurality of holes 16.

The bars 1 and 2 are eachprovided with a plurality of closely arrangedholes 17 near the lower end and a pair of-flat cross bars 18 and19 are adjustably secured to the bars 1 and 2 by the bolts 20 extending through the holes 17. i

The bar 19 is formed with offset ends 21 i which withthe ends of the bar 18 form jaws to embrace the bars 1 and 2 and rigidly secured in the inner ends of these jaws are-a pair of hook-shaped members 22. These hooks may be ad usted in relation to the upper hooks '3 by shifting the bars 18' and 19 up or down to suit the spacing of the ladder V rungs. I

It will be seen that the rigid flat frame formed by the bars 1 and 2 rests against the ladder rungs and is held very securely by the two pairs of hook members, consequently the platform support formed by the bar 10 is very rigid and presents a two point support for theplanking 23 which is placed thereon.

The upper end of the bar 13 extends above the outer end of the support bar 10 and ensures the platform planking from slipping off the bracket. I

Under some working conditions it is desirable for the workmen to operate on the inside of the ladders and the brackets are hung on the inside of the ladders as shown in Figure 1, or they may arrange the brackets on the outer side of the ladders as shown in Figure 2. In some cases it may be desirable to use a wide scaffold and brackets may then be arranged on each ladder on both inner and outer sides to support a scaffold on both sides of the ladders, permitting a work'impossible to be finished from the inside owing to the angular relation of the ladders to the wall to be finished from the outside .without the necessity of changing the one inside bracket to the outside.

A single ladder may be used in many cases ill) to advantage by a workman by placing a short board on the forked member for a rest instead of using a rung of the ladder.

What 1 claim as my invention is:

1. A ladder scaffold bracket, comprising a rigid flat U-shaped frame, the leg portions of which are spaced parallelly apart and are adapted to rest against the ladder rungs adjacent their outer ends, the ends of said leg portions being curved downwardly to form a pair of hooks to encircle the outer ends of a ladder rung, a pair of hooks adjustably secured to said frame adjacent to its lower end and imn'iediately adjacent the inward side of said leg portions, a U-shaped platform support pivoted at the sides of the frame at its upper end, and a strut pivoted at the lower end of the frame and adjustably connected to the arched outer end of the U-shaped plat form support.

2. A ladder scaffold bracket, comprising a rigid flat frame having side members spaced apart adapted to rest against the outer ends the ladder rungs and having a pair of hooks at the top, a cross bar extending between and adjustably secured to the side members of said frame, a pair of hooks rigidly secured to said cross bar, immediately adjacent the inward side of said side membore, a strut pivotally secured to the bottom of said frame, and a U-shaped platform support pivotally secured to the top of the side members of said frame and adjustably connected at its outer arched end to said strut.

3. A ladder scaffold bracket, comprising a pair of flat bars hooked at the upper ends and having inwardly curved lower ends terminating in laterally bent lugs, a cross bolt connecting the upper ends of said bars, an adjustable cross bar secured between the lower ends of said hooked bars, hooks secured to said cross bar, a strut pivoted between said lugs, a U-shaped bar having its ends pivoted on said bolt,and means for adjustably connecting the outer end of said U-shaped bar with said strut.

i. A ladder scaffold bracket, comprising a rigid fiat frame having side members spaced apart adapted to rest against the outer ends of the ladder rungs and having a pair of hooks at the top, said side members having a plurality of oppositely arranged holes adjacent the lower end, a cross bar extending between said side members and having holes inthe outer ends to register with the holes in the side members, bolts extending through the registering holes and clamping said cross bar in an adjusted position on the side mem bers, a pair of hooks extending from said cross bar immediately adjacent the inner side of said side members adapted to engage a ladder rung, a strut pivot-ally secured to the bottom of said frame, and a platform support pivotally secured to the top of the side members of the frame and adjustablyconnected at its other end to said strut.

JAMES B. VVABDLE.