US2605037A - Ladder support - Google Patents

Description

July 29, 1952 w. P. E. SMITH 2,605,037

LADDER suPPoR'-11 Filed oci. 1a, 1946 f Maw INVENTOR. M4 @fer D J/v/rf/ Patented July 29, 1952 -:UNITED-fmms i* y jlatoaosr ,Y y LADDER SUPPORT This instant invention 'pertains to ladders and its main object is to providefa' ladder with lan attachment to prevent' the -formerjlfrom vtipping backward or slipping. l Y

Another object of the invention is to provide means preferably associated with the top end of the ladder and preventing slipping, suchmeans being also adapted for supporting a stage or scaffold board at various heights and therefore adapting the ladder for being used as a scaffold.

With these and other objects in view as will become apparent as the invention is understood, the same resides in the novelty of combination, construction and arrangement of parts specif ically hereinafter described and claimed in the appended claim. Y

For a better understanding of the description the same refers to the accompanying drawings illustrating a preferred embodiment of the invention and wherein:

Figure 1 is a side view of my ladder.

Figure 2 is a front elevation thereof.

Figure 3 is an enlarged detail view of the inner side of anti-slipping means.

Figure 4 is an enlarged detail view of the base member.

In the drawings wherein like characters of reference designate like or similar parts throughout the several views, numeral 5 denotes either of a pair of parallel base bars which carry on their outer or remote sides spurs 1 extending slightly below the bottom edges of the bars and engaging the ground to prevent sliding thereon. The front ends of the base bars are held in spaced relation by a rod 9.

To the outer side of either base bar and adjacent the rear end thereof is secured by fasteners Il a triangular plate l2 to the upper apex of which is pivoted by bolt I3 the lower end of the ladder stile I5 connected by horizontally dis'- posed spaced rungs I1 to the other stile.

The ends of the second rung from the bottom project somewhat beyond the outer sides of the stiles and function as pivots for the upper ends of a pair of diagonal brace bars 20 the intermediate portions 2| of which are offset outwardly (Figures 1 and 2). The lower ends of the bars 20 are connected by a rod 23. Abutment plates 25 are each affixed with their lower portion by fasteners 26 to the inner side of a base bar and include an upper portion extending above the latter. This upper portion is formed into a plurality of spaced hooks 2l opening rearwardly. Each hook is transversely aligned with a hook formed on the abutment plate of the other base bar. Each pair v v Wilbert El# Smith, Thomaston, Conn.' Aspiration cacher 1s, 194s, serial No. 704,107.-

" 1 claim. (o1. 22S-,64X

of valigned hooks may receive rod 23 Athrough entrancejopenings each the hook. l

To'the u be removed from an aligned pair of hooks or in serted therein only when the latches extend upwardly (Figure 3).

Each stile of the ladder is provided with a series of holes 35 each horizontally aligned with a holelr in the other stile. The top pair of aligned holes in Figure 1 is above the top rung and occupied by a rod 36 also passing through the inner ends of the bracket legs 38 the rear ends of which are connected by a board 4U covered on its outer or rear side with rubber 4| preventing slipping on a supporting wall. The legs are on the inner sides of the stiles and carry aflixed to their confronting sides ratchet wheels 43 held in a predetermined angular position by pawls pivoted to the inner sides of the stiles. Supports 41 are aflixed to the rear edges of the stiles and in proximity to a pair of holes 35 and hold the bracket legs pivoted on the rod 35 inserted in that pair of holes in horizontal position. Figure l shows the legs 38 and board 40, 4I in full and dotted lines at different elevations. If a pair of ladder structures is used, a stage or scaffold board may be placed on the pairs of legs, one pair of which is shown in dotted lines in Figure l.

Thus it is apparent that the brackets 33, 40, 4| and board 50 make it possible to use a pair of the ladders as a scaffold.

The foregoing description is believed to sufficiently point out the operation of the device.

I desire it to be understood that the described and illustrated embodiment of my invention is merely an illustration or example, not a limitation thereof and that changes and modifications may be resorted to without departing from the spirit of the invention.

What I claim is as follows:

In a ladder, a pair of laterally spaced vertical stiles, rungs extending between the stiles, a pair of laterally spaced horizontal base bars having forward and rearward ends, said stiles having their lower ends pivotally supported on the rearyadjacent Uthe free end of per portion of eachfplate25 are 'piv oted by pins `29g-'the rearwarjdor lower ends of aA plurality of latches 30, one foreach hook; the freeV or forward end of each latch terminating' in'aU reduced finger 3| extending at right angles to a shoulder 32 at the upper end of the shoulder. They ward ends of the base bars, forwardly declining diagonal brace bars having upper ends pivoted on the stiles and lower ends, a horizontal transverse rod extending between and iixed on the lower ends of the brace bars and overlying the horizontal base bars, longitudinally spaced hooks fixed on and rising from the base bars, said hooks faoing rearwardly and having rearwardly opening apertures in which said transverse rod is selectively engageable'to support said stiles in selected angular relation to said base bars, and latches having one end thereof pivoted on the hooks and free ends, said latches being arranged to occupy forwardly reclining closed positions in which the latches bridge the space between two adjacent hooks, the free ends of the latches having fingers arranged to overlie the transverse rod positioned therein and shoulders beneath the ngersengageable with the side of the transverse rod opposite to that engaged in a hook aperture whereby the transverse rod is held in place, the latches being swngable upwardly from their closed positions to open vertical positions in which the iingers and shoulders are disengaged from the transverse rod to permit the transverse rod to be removed froml a hook aperture. f

WILBERT P. E. SMITH.

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

UNITED STATES PATENTS Number Name Date 140,286 Longcor June 24,V 1873 141,126 Eagan July 22, 1873 v292,932 Markwick Feb. 5, 1884 327,570 Marston Oct. 6, 1885 713,358 Stiles et al Nov. 11, 1902 771,352 Clough Oct. 4, 1904 799,360 Smith Sept. 12, 1905 1,004,284 Lehmann Sept, 26, 1911 1,118,199 Hawk Nov. 24, 1914 1,335,369 Donohue Mar. 30, 1920 1,474,462 Blankenhagen Nov. 20, 1923 FOREIGN PATENTS Number p Country Date 7,200 Great Britain Jan. 30, 1913 429,966 .Great Britain June 11, 1935 778,298 France Dec. 22, 1934

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