US368199A - Step-ladder - Google Patents

Step-ladder Download PDF

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US368199A
US368199A US368199DA US368199A US 368199 A US368199 A US 368199A US 368199D A US368199D A US 368199DA US 368199 A US368199 A US 368199A
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Prior art keywords
ladder
legs
feet
lever
edgar
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • E06C1/39—Ladders having platforms; Ladders changeable into platforms
    • E06C1/393—Ladders having platforms foldable with the ladder

Definitions

  • This invention relates to certain newand useful improvements in step-ladders.
  • the object of the invention is to construct a step-ladder that can readily be adjusted upon uneven surfaces in such a manner as to keep 15 the steps of the ladder upon a horizontal plane.
  • FIG. 1 is a perspective of my improved step'ladder.
  • Fig. 2 is a vertical section through the foot of the ladder, showing arrangement of the adjustable sliding feet.
  • A represents a stepladder of any suitable construction.
  • I In the lower ends of the side bars or legs of this laddcr I place extension-feet 13, arranged to have a sliding movement therein between proper 0 guides, G, secured to the ladder.
  • D is a lever properly fulcrumed below the lower step of the ladder and between the side bars thereof.
  • the ends of this lever are con-
  • a casting, G in which are formed suitable bearings to receive the rounded end of the brace-bar H.
  • the opposite end of this brace-bar is slotted in its longitudinal direction, and through which a thumb-screw, l, passes and screws into the opposite rear leg.
  • This ladder is more especially designed for outdoor use-as, for instance, in picking apples when the ground is uneven or upon a side-hill-and it will readily be seen from the construction shown that the extension-feet will automatically adjust themselves to the surface of the ground, one foot being projected as the other is retracted.
  • the rear legs can readily be adjusted so as to bring the steps of the lad der upon a horizontal plane.
  • ⁇ Vhat I claim as my invention is 1.
  • a step'ladder provided with automatically vertically adj ustable exteusioirfeet working loosely in guides on said ladder, substair tially as described.

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  • Ladders (AREA)

Description

(No Model.)
G. M. EDGAR.
STEP LADDER.
No. 368,199. Patented Aug. 16, 1887.
www.
UNITED STATES PATENT OFFICE.
GEORGE M. EDGAR, OF GLARKSTON, MICHIGAN.
STEP-LADDER.
SPECIFICATION forming part of Letters Patent No. 368,199, dated August 16, 1887. Application filed April 28, 1887. Serial No. 2364138. (N0 model.)
IO This invention relates to certain newand useful improvements in step-ladders.
The object of the invention is to construct a step-ladder that can readily be adjusted upon uneven surfaces in such a manner as to keep 15 the steps of the ladder upon a horizontal plane.
To this end the invention consists in the peculiar construction and combination of the various parts, all as more fully hereinafter set forth. 0 Figure 1 is a perspective of my improved step'ladder. Fig. 2 isa vertical section through the foot of the ladder, showing arrangement of the adjustable sliding feet.
In the accompanying drawings, which form a part of thisspecification, A represents a stepladder of any suitable construction. In the lower ends of the side bars or legs of this laddcr I place extension-feet 13, arranged to have a sliding movement therein between proper 0 guides, G, secured to the ladder.
D is a lever properly fulcrumed below the lower step of the ladder and between the side bars thereof. The ends of this lever are con- To one of the legs F is pivotally secured a casting, G, in which are formed suitable bearings to receive the rounded end of the brace-bar H. The opposite end of this brace-bar is slotted in its longitudinal direction, and through which a thumb-screw, l, passes and screws into the opposite rear leg.
This ladder is more especially designed for outdoor use-as, for instance, in picking apples when the ground is uneven or upon a side-hill-and it will readily be seen from the construction shown that the extension-feet will automatically adjust themselves to the surface of the ground, one foot being projected as the other is retracted. The rear legs can readily be adjusted so as to bring the steps of the lad der upon a horizontal plane.
\Vhat I claim as my invention is 1. A step'ladder provided with automatically vertically adj ustable exteusioirfeet working loosely in guides on said ladder, substair tially as described.
2. The combination, with the ladder, of the feet B, working in guides on said ladder, lever D, and connections between said lever and ladder, substantially as and for the purpose specified.
8. The combination, with the ladder and the legs F, swiveled thereto, of the casting G, pivotally secured to one of said legs, and the bracebar H, pivoted at one end in said casting and the other end adj ustably connected to the other leg, substantially as and for the purpose specitied.
GEORGE M. EDGAR.
\Vitnesses:
H. S. SPRAGUE, CHARLES J. HUNT.
US368199D Step-ladder Expired - Lifetime US368199A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027969A (en) * 1959-08-19 1962-04-03 Leonard R Erickson Automatic locking self-leveling ladder
US5180031A (en) * 1990-12-11 1993-01-19 Smith Daniel S Gardener's aid for sloped ground

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027969A (en) * 1959-08-19 1962-04-03 Leonard R Erickson Automatic locking self-leveling ladder
US5180031A (en) * 1990-12-11 1993-01-19 Smith Daniel S Gardener's aid for sloped ground

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