US434792A

US434792A - Louis ivopf

Info

Publication number: US434792A
Authority: US
Publication date: 1890-08-19
Anticipated expiration: 1907-08-19

Description

(No Model.)

L. KOPF. FOLDING STEP LADDER.

No. 434,792. Patented Aug. 19. 1890.

ATTORNEY.

n1: Ngmms PETERS 0b., mmmimlo WASHINGTON, n. c.

A UNITED STATES PATIENT v OFFICE.

LOUIS KOPF, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO NEHEMIAH GOLDBERG, OF SAME PLACE.

FOLDING STEP-LADDER.

SPECIFICATION forming part of Letters Patent No. 434,792, dated August 19, 1890.

Application filed May 8, 1890.

- direction or sidewise, thus placing the same in compact form for storage and transportatlon, the steps remaining connected at both ends with the ladder, the latter consequently being intact at all times.

Figure 1 represents a perspective front view of a folding step-ladder embodying my invention. Fig. 2 represents a side elevation of the same in folded condition. Fig. 3 represents a rear elevation of the ladder in condition for use, drawn on a reduced scale.

Similar letters of reference indicate corresponding parts in the several figures.

Referring to the drawings, A and B designate legs, and C designates steps whose ends are hinged to said legs, and thus connected therewith.

D designates a brace, which extends diagonally from the top cross-piece E of the leg A to the lower cross-piece F of the leg B, thus preventing the legs from closing or folding on each other. It will be seen that the hinges of the lower step 0 are respectively on the upper and lower sides of the ends of the same, whereby said step may be transposed from its horizontal to a vertical position for folding purposes. The hinges of the top step are on the under side of the ends of the same, one of the hinges being on the outside of the leg A, thus providing for the change of position of said step for folding purposes and avoiding the location of hinges on the upper side of the same. The brace D and cross-piece E, are connected by eyes G G, which are attached to the respective parts, so that said brace is permitted to have great freedom of motion while being manipulated for application and removal to and from po sition. It will be seen that when said brace Serial No. 351,075. (No model.)

is in position, all parts being located as in shoulders .II on the respective cross-pieces E and F of the legs A B.

When the ladder is to be folded, the brace is manipulated so that it is disengaged from the shoulder of the cross-piece F, whereby it hangs freely from the cross-piece E and against the leg A. The leg B is now moved upwardly and the steps 0 follow the same, turning to vertical positions on the legs A as their axes, the legsB and the steps thus folding sidewise, whereby the ladder is in compact condition, as shown in Fig.- 2.

It is evident that the ladder may be unfolded or restored by lowering the leg l3 and the steps and then locating the brace in its diagonal position, whereby the ladder as such is again in serviceable and firm condition, it being noticed that as the brace extends from the top cross-bar of one leg to the lower crossbar of the opposite leg a single brace is sufficient to keep the leg distended and stiffen the ladder. It will also be noticed that the steps are not disconnected from the legs, or vice versa, when the ladder is folded, the parts thus remaing intact at all times.

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

1. In a folding step-ladder, the combination of legs, steps hinged thereto, and a brace hinged to the top cross-piece of one of said legs and adapted to have alateral movement, and extending downward diagonally to the lower cross-piece of the other leg, substantially as described.

2. In a folding step-ladden hinged legs and steps combined with a brace hinged by eyes G, whereby a lateral movement of said brace is permitted to be free of engagement with other parts when folded, substantially as described.

3. In combination with the legs A and B of the lower or intermediate step, having hinges attached to the under side thereof and adapted to fold upward, the top step hinged of the other leg and abutting thereagainst, on the underfside to the inside of one leg and substantially as described.

the outside 0 the other leg, whereby in folding one leg is extended above the other, and LOUIS IXOPF a laterally-movable brace hinged to the top \Vitnesses:

cross-piece of one of said legs and extending JOHN A. WIEDERSHEIM,

downward diagonally to the lower cross-piece A. P. JENNINGS.