US1178084A - Step-ladder. - Google Patents

Description

J. A. LOPEZ.

STEP LADDER.

APPLiCATION FILED SEPT. 2, 1915.

1,178,084. Patented Apr. 4, 1916.

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THE COLUMBIA PLANOGRAPH Co., WASHINGTON, D. c. I

JOAQUIN A. LOPEZ, OF BANES, CUBA.

STEP-LADDER.

Specification of Letters Patent.

Patented Apr. 4, 1916.

Application filed September 2, 1915. Serial No. 48,704.

To all whom it may concern Be it known that I, JOA UIN A. LOPEZ, a citizen of the Republic of Cuba, residing at Banes, in the Province of Oriente, Republic of Cuba, have invented certain new and useful Improvements in Step-Ladders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention is directed to improvements in step ladders, and has for its object to provide a device of this character which is capable of being collapsed when not in use, or extended for use.

A further object of the invention is to provide a ladder which is constructed from light metal so that the same will withstand the hard usage to which it is subjected.

A still further object of the invention is to provide a ladder capable of being used as temporary steps for a building, berths of steamers and cars, gun carriages, or for any other purpose seen fit.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which Figure 1 is a side elevation of the ladder in its extended position; Fig. 2 is a similar view, showing the ladder collapsed or folded. Fig. 3 is a top plan view of the ladder in its extended position. Fig. 4 is a sectional view on line 41 of Fig. 3. Fig. 5 is a similar view on line 55 of Fig. 8. Fig. 6 is a detail perspective view of the supporting clamp.

The ladder consists of lazy-tong side frames 1, which are obviously capable of being extended or folded. The bars 2 of the frames 1 are pivotally connected to the bars 3 thereof by rods at, and rivets 5, said rods also serving to pivotally support the treads 6 and risers 7. The ends of the rods at are threaded and engaged by clamping nuts 8.

Pivotally connected to the ends of the lowermost bars 2 are uprights 9, uprights 10 being also similarly connected to the uppermost bars 2. Connecting the uprights 9 and 10 are ropes or cables 11, which serve'as balustrades when the ladder is extended.

It will be noted that the uppermost bars 2 are comparatively long, whereby the same may engage under the support 12, and in this instance being shown as a door sill, but it will be of course understood that the ladder can be used in connection with other supports.

Mounted on the support 12 are clamps 13, which consist of loops 14:, the arms of which embrace the support. The lower arms of the loops 14 are provided with curved recesses 15, which are adapted to receive the extended ends 16 of the uppermost rods 4, which are held in said recesses by the curved jaws 17 of the plates 18, said plates being.

held in place by the clamping bolts 19, the same being passed through the arms of the loops and the support.

From the foregoing description it will be seen that a ladder has been provided which can be used for a number of purposes, and further that the same can be readily folded when not in use, and extended for use, when desired.

WVhat is claimed is 1. A ladder having collapsible side frames, rods connecting the side frames, treads and risers hingedly connected to the rods, uprights connected to the upper and lower frames, and flexible balustrades connecting the uprights.

2. A ladder having collapsible side frames, rods connecting the side frames, treads and risers hingedly connected to the rods, one.

of said rods having extended ends, and means carried by a support for detachably engaging the extended ends of the rods.

In testimony whereof, I affix my signature, in the presence of two witnesses.

JOAQUIN A. LOPEZ.

WVitnesses:

A. ELLIs, I 1W1. E. HARTLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. G.

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