US971677A - Ladder-bracket. - Google Patents

Description

R. A. HOLDRIDGE.

LADDER BRACKET.

nrmoumn nun JULY 11, 1910.

Patented Oct. 4, 1910.

IIID

- tea LADDEB-BRACKET.

Specification of Letters Patent.

Original application filed March 17, 1910, Serial No. 549,964. Divided and this application filed July 11,

To all whom it may concern:

Be it known that I, RANSOM A. HOLDRIDGE, citizen of the United States, residing at Virginia, in the county of St. Louis and State of Minnesota, have invented new and useful Improvements in Ladder-Brackets, of which the following is a specification.

My present invention pertains to ladder brackets, and consists in the simple, safe and easily adjusted ladder bracket hereinafter described and definitely claimed.

In the drawings, accompanying and forming part of this specification: Figure 1 is a View, partly in vertical section and partly in elevation, illustrating an extension ladder on which I prefer to employ my novel bracket and also showing the bracket ready for use. Fig. 2 is a View, partly in elevation and partly in section, taken at a right angle to Fig. 1. Fig. 3 is a cross-section taken in the plane indicated by the line 3-3 of Fig. 2, looking downward.

Similar letters of reference designate corresponding parts in all of the views of the drawings.

The ladder sections B and H are of the construction fully shown and described in my contemporary application filed March 17, 1910, Serial Number 549,964, and need not, therefore, be described herein except to say that the section B is provided with side bars a, rungs b, sockets E and arms D having inwardly-directed portions 2', while the section II comprises side bars a, rungs b, and claws F, and is provided at its upper end with angularly-disposed portions 7a with which are connected anti-friction rollers I having for their office to prevent injury to the side of a building when the ladder is placed against the same or is moved up or down while in engagement with said building side.

Journaled in the upper portions of the side bars a comprised in the upper section II is a metallic rock-shaft J, Figs. 1 and 2, and fixed to said rock-shaft it is one link K of m novel foldable ladder bracketz'. 6., a bracket adapted in combination with a similar bracket on another ladder, to support a board or the like (not shown). In addition to the said link K, the ladder bracket comprises a link L which is pivoted at Z to the link K, and is notched, as indicated by m, and a dog M which is pivotally connected at p to one side bar a of the section II, and is adapted to cooperate with an adjacent rung b of said section in holding the link L in the position shown n Fig. 1-

It will be noted by comparison of Figs. 1 and 2 that the lower arm of the dog M is proportionately heavy, and that on the upper arm of said dog is a shoulder r for the purpose of entering the notches in one at a time, and a horn s which is of a length to bear against the rung next above the fulcrum point p of the dog. Obviously when the parts are arranged as shown in Fig. 1, the imposition of weight on the bracket link K will tend to hold the horn 8 against the adjacent rung, and will also tend to hold the shoulder 7" in one of the notches m, and the link L between the rung and the shoulder 7", with the result that there is no liability of the bracket collapsing under the weight thereon. When, however, it is desired to fold the bracket, the same may be accomplished by swinging the upper end of the dog M away from the adjacent rung, so as to release the link L from the dog, and then the links K and L may be allowed to hang idle against the rungs of the section H.

While I have illustrated and described my novel bracket as carried by the upper section of an extension ladder such as disclosed in my aforesaid contemporary application, of which this application is a division, I would have it understood that the bracket may be used on any suitable ladder or other suitable support without involving departure from the scope of my invention as claimed.

While I have shown and described one form of my bracket invention, it is to be understood that I am not limited to the details or the form or relative arrangement of parts disclosed, but that modifications may be made therein without departing from the spirit thereof.

Having described my invention, what I claim and desire to secure by Letters Patent, is:

1. The combination with a ladder having side bars and rungs; of a rock-shaft journaled in and extending between the side bars, a vertically swinging link fixed to said rock-shaft, a notched link pivoted to the outer portion of the first-named link, and a dog pivotally connected with one of the side bars and having a proportionately heavy lower arm and also having an upper arm on which is a shoulder adapted to engage the said notched link, and a horn adapted to bring up against an adjacent rung.

2. The combination of a suitable support, a vertically swinging link connected therewith, a stop carried by the support and located below the pivotal point of the said link, a notched link pivoted to the outer portion of the first-named link, and a dog 10 pivotally connected with the support and my hand in presence of two subscribing wit- 15 nesses.

RANSOM A. HOLDRIDGE. Vitnesses R. O. PICKERING, N. B. ARNOLD.

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