US1648844A - Stepladder - Google Patents

Description

Nov. 3, 1927. 1,648,844

O. FRISK STEPLADDERY Filed March 18. 1927 O m/arflewri WITNESS: W ATTORNEY UNITED STATES PATENT OFFICE.

Application filed March 18, 1927.

This invention relates step ladders.

The primary OSKAR FRISK, 013

new YORK, N. Y.

STEPLADDEB.

to improvements in object of theinvention resides in a step ladder of the self supporting type and which may be adjusted for reaching a relatively great height, or in instances where a tall ladder could not be erected, the

same may be folded to meet the occasion.

Another object of the a shorter height to invention is to provide a step ladder having supporting legs with added extensions lower step of the ladder hinged thereto, the serving as a means for locking the extensions of the front legs in an extended position wh the. ladder is desired and may be folded back upon to reduce the height of the ladder when in a restricted place.

en the full length of which extensions the respective legs used A further object of the invention is the provision of a step ladder of the kind above mentioned which is simple in construction,

easy to adjust, and strong and durable for the purpose intended.

With these and other objects in view, the 1 invention resides in certain novel construction and combinatlon and arrangement of parts, the essential fea tures of which are hereinafter fully described, are particularly pointed out in the appended claims, and are illustrated in the accompanying drawing, in

which Figure 1 is a perspective view of my improved step ladder in an extended position.

Figure 2 is a side elevational view of the ladder in a folded posit Figure 3 is a detail sectional the removable step.

Figure 4. is a perspec movable step.

ion.

view through tive View of the rewhich includes spaced parallel front 11 having steps 12 secured thereto.

legs 11, The top of the legs support a platform 13 and swing ingly mounted to the platform is a prop 14 which includes space legs 15. Foldable brace bars 16 are connected to the prop and the front legs to limit the separation of the same. Hingedly connec 11, 11 as at 17 are 18.

ted to the front legs leg extensions or sections The hinges 17 are fastened to the outer side faces of the legs and leg sections with the knuckles or barrel of the hinges disposed above the bottom Of the es tha the a d Serial No. 176,460.

legs may rest fiat against the supporting surface. The lower leg sections are braced by a removable step 19 which co-acts to lock the sections against outward swinging movement when in a set-up position. The ends of the step 19 are provided with cars 20 which extend through aligned slots 21 provided in the lower leg sections. The ears are provided with slots 22 for receiving wedge keys 23 which engage the outer side faces of the leg sections 18 for locking the step against accidental separation.

The legs 15, 15 of the prop are of the same length as the front legs 11 and have leg sections or extensions 24: hinged thereto as at 25. The knuckles or barrels of the hinges are disposed above the lower ends of the legs 15 to permit the legs to rest flat against a supporting surface when the leg sections are in a folded position. For locking the joint between the legs 15 and the leg sections 24, I provide keepers 26 on the legs 15 and the corresponding leg sections 24 and which keepers receive wedges 27 which bridge the joint th-erebetween and further serve to strengthen the joint. The hinges 25 unlike the hinges 17 are mounted on the inside edges of the legs 15 and the leg sections 24L so that the leg sections may swing inwardly when in a folded position to lie flat against the leg sections 15.

When the leg extensions are extended into the position shown in Figure 1 of the drawings and are locked by the wedges, the same provides a ladder of a relatively tall height for use when it is desired to reach corresponding heights. However, should it be desired to set-up relatively low ceiling, the leg sections 18 and 24 are folded back upon the legs 11 and 15 as shown in Figure 2 of the drawing and are held in such position by hooks 28 carried by the legs proper and which engage eyes 29 provided on the extensions. It will, of course, be understood that the wedges and step are first removed before swinging the sections to a folded position.

A ladder of this kind is especially adapted for household purposes and it will be found useful by painters, paper hangersand carpenters for working in rooms where the average height ladder could not be erected.

What is claimed as new is auxil a y lee S ctions h ng to the l er the ladder in a room having a Ice ends of said legs, a step removably supported by said leg sections, ears provided on the ends of said step for passage through aligned slots provided in said leg sections, said ears 5 having slots therein, and wedges passing through said last mentioned slots and engaging the sides of said leg sections, substantially as and for the purpose specified.

2. A step ladder comprising front and 10 rear legs movable to a position in diverging relation to each other, extension legs hinged to thelower ends of the respective legs and foldabl-e thereagainst, the joint of each hinge being disposed inwardly from the lower end of the leg to allow the leg to rest fiat upon 3 a supporting surface when said extension is folded, and locking means for holding said extension legsinco-extensive position with the respective front and rear legs.

In testimony- Whcreof I have aflixed my 20 signature. 7 r V OSKAR FRISK.

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