US729561A - Step-ladder. - Google Patents

Description

UNrTED STATES Patented June 2, 1903.

PATENT FFICE.

MARCUS FALK, oF HARTFCRQ, CONNECTICUT.

sPEcIFIcATIoNrerming part nor Letters 12a-tent No. 729,561,- datea June e, 1903.

` Apparition sied November e, 19c2.jfsria1N. i'sogzso. (No man.)

To all whom vi? may.concern:`

Beit known that I, MARCUS FALK, a citizen2 of the United States,,re`siding in the city of Hartford, in the county of Hartford and State of Connecticut, have invented new and use. ful Improvements inStep-Ladders; and Ido1 hereby declare the following to be a full, clear,

ble legs, of, my step-ladder detached. Fig. 4

is a detail view showing a portion of the top surface of. one of the treads with the extensible leg and a portion of the frame in section, and Fig. 5 is a detail view of one of the castings.

Similar indices refer to and denote like parts throughout the several views.

The object/of this inventionisfto provide a step-ladder with auxiliary extensible legs on the front supports, whereby the ladder may be adjusted to stand level even Vwhen the front legs are placed on a lowersurface than the rear legs-as, for instance, stairways or the like.

Another object is to provide a step-ladder adapted to stand level on a level surface and also adj nstable to stand level on two different elevations, whichfwill be simple in character, compactin form and construction, easily operated, and whereby the operator will be enabled to perform his work with safety and in a minimum of time and with a saving of labor.

Anotherpbject is the provision of an article of manufacture-an adjustable step-ladderwhich can be manufactured and sold at a comparatively low price.

Other objects and advantages will appear from the following specification and from the drawings forming a part thereof.

Referring now to the drawings, A and By represent the rear leg members of a step-ladder united by cross bars and braces in any 'well-knownVmann'er.; C represents the top or,platform, ,extending down from the under side ofwhich near each end are cross-blocks IC and C", to the rear portions of which are pivotedfthe upper ends of the said legs A D represents spreaders adapted to hold the legs A' andjB at the desired point when extended.

Erepresents a shelf.

f `All of the above-named parts are old and maybe variously changed to snit the various requirements.

Extending d (nynward and forward at an angle from the cross-blocks C' and C, respectively, are the front-leg members l and 2, pro- Eachvof the legs l and 2 is provided with a Y nu mberof castings 5,secured therein,as shown in Fig.j4, the port-ionforming the opening 5 projecting through the slots 3 and 4 and the freeends being adapted to grip the ends of the treads 6. Said castings 5 are secured to the -legs 1 and 2 by screws orv nails which pass through the legs, the castings, and project into the ends of the treads 6, as shown in Fig. 4, thus securing the castings in place in the legs and also securingthe ends of the treads in place in the castings. The treads 6 are further secured by nails'or screws passing through the parallel ends of the castings and into the front and rear edges of the treads 6, as sho-wn. After all the castings and'treads 6 are secured in place, as shown, it will be seen that the two rows of castings 5 will provide guideways by means of the openings v5', extending from the top to the bottom of the legs'l and 2. I now provide two auxiliary legs 7 and 7 of a length substantially the same as the length of the slots 3 and 4 and of a size to loosely fit into the openings 5. The lower ends of the legs 7 are forked, and secured inthe forks are blocks 8 and 8, one edge IOC of which is adapted to rest level on the door of a room, and secured on the under edge of the block 8 are rubbers 9 to prevent the ends of the legs from slipping. It will now be apparent that the legs 7 may be inserted in the openings as shown in Figs. l and 4, or they may be extended to the point desired,as shown in Fig. 2. A

The indices a: represent openings passing through the legs l and 2 at right angles thereto and through the slots 3 and 4, and z represents openings passing through the legs 7, adapted to be brought into alinement with the openings at various points.

lO and represent two bolts or pins adapted to pass through the openings and z, by which the legs 7 may be secured at the extended point desired.

It will now`be seen that my step-ladder may be placed on a level door and used in the usual manner, as shown in Fig. l; but should it be desired to use my ladder, for instance, on a stairway the rear legs A and B may be placed on an upper step and the legs 7 may be extended to reach a much lower step in order to keep the treads 6.on a level, and the legs 7 may then be secured at that point by means of the bolts 10, as shown.

Myinvention is perfectly adapted to accomplish the purposes for which it is intended, and it is evident that changes in and modifications of the specific construction herein shown and described may be made and that analogous parts may be used to accomplish the same results without departing from the spirit of my invention or sacrificing any of its many advantages, and the specific construction of the details of my invention may be variously changed without altering the essential principles which are claimed as new.

Having nowefully shown and described my invention and the best mode for its construction and use to me known at this time, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. In an extensible step-ladder the combination, of the two forward legs each provided with a slot extending from their lower ends to near the upper ends, a plurality of castings 5 secured at frequent distances apart in each of said slots, said castings forming projecting ends into which are secured the ends of the treads, and each of said castings having an opening 5 forming guides for the auxiliary legs, of the auxiliary legs adapted to slide in said openings in the castings 5 and parallel with thelegs 1 and 2, a block 8 secured in the lower ends of the legs 7, and a rubber secured on the lower face of said blocks, all substantially as shown and described and for the purposes set forth.

2. In a step-ladder the combination of the main supporting-legs 1 and 2 formed with a slot extending from the bottom to near the top thereof, of the castings 5 secured in said slots at frequent distances apart, the tread secured in said castings the auxiliary legs 7 adapted to be adjusted endwise through openings in the castings 5, means for securing the legs 7 at various points along the lengths thereof, and a contact-block and rubber secured on the lower ends of each of the legs 7, substantially as shown and described.

In testimony whereof I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

MARCUS FALK.

Witnesses:

SAMUEL GIPSTEIN, A. SHAPIRO.

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