US666526A - Ladder. - Google Patents

Ladder. Download PDF

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Publication number
US666526A
US666526A US3107700A US1900031077A US666526A US 666526 A US666526 A US 666526A US 3107700 A US3107700 A US 3107700A US 1900031077 A US1900031077 A US 1900031077A US 666526 A US666526 A US 666526A
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Prior art keywords
ladder
bars
pivoted
howard
standards
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US3107700A
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John J Howard
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Individual
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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
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles

Definitions

  • My invention relates to ladders, and has for its object to construct a ladder which may be safely and automatically placed in position upon a hillside or other inclined surface.
  • the drawing represents a perspective view of my invention.
  • any preferred form of ladder herein shown as the ordinary step-ladder A,having the rear braces B.
  • Pivoted to said ladder are two transverse bars (3 D, (here shown as pivoted on the upright rear bar E,) firmly secured to the rear sides of the ladder, the bars 0 and D being centrally pivoted at the points F and G and having the respective ends extending out beyond the sides or risers of the ladder.
  • these bars C and D extend through slots H, formed in the sides of the ladder and acting as guides for the bars.
  • K K are standards pivotally connected to the outer ends of the bars 0 and D and so positioned that they slant from their lower ends inwardly toward the sides of the ladder, the lower ends of the standards K K being considerably below the foot of the ladder.
  • a step-ladder comprising a ladder and a rear brace pivoted at the top, the ladder having transverse parallel bars pivoted thereto and a longitudinal standard at each end of the parallel bars,each standard being pivoted to the ends of both of said bars,and means for securing the standards in any adjusted position.

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  • Ladders (AREA)

Description

No. 666,526. 1 Patent Ian. 22, [90L J. .1. HOWARD.
LADDER.
(Application filed Sept. 25, 1900.,
(No Nodal.)
UNITE TATES JOHN J. HOWARD, OF GRASS VALLEY, CALIFORNIA.
LADDER.
SPECIFICATION forming part of Letters Patent No. 666,526, dated January 22, 1901. Application filed S t ber 25, 1900. $eria11lo. 31,077. (No model.)
To to whom it may concern:
Be it known that 1, JOHN J. HOWARD, of Grass Valley, county of Nevada, State of California, have invented certain new and useful Improvements in Ladders; and I do hereby declare the following to be a full and clear description thereof.
My invention relates to ladders, and has for its object to construct a ladder which may be safely and automatically placed in position upon a hillside or other inclined surface.
The drawing represents a perspective view of my invention.
In constructing my ladder I use any preferred form of ladder, herein shown as the ordinary step-ladder A,having the rear braces B. Pivoted to said ladder are two transverse bars (3 D, (here shown as pivoted on the upright rear bar E,) firmly secured to the rear sides of the ladder, the bars 0 and D being centrally pivoted at the points F and G and having the respective ends extending out beyond the sides or risers of the ladder. Preferably these bars C and D extend through slots H, formed in the sides of the ladder and acting as guides for the bars.
K K are standards pivotally connected to the outer ends of the bars 0 and D and so positioned that they slant from their lower ends inwardly toward the sides of the ladder, the lower ends of the standards K K being considerably below the foot of the ladder.
low that of the foot of the other standard without causing the ladder to depart from the upright position. Furthermore,it will be apparent when placing the ladder upon a hillside, slanting from one side to the other of the ladder, that the standards will automatically adjust themselves on the ground.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is
A step-ladder comprising a ladder and a rear brace pivoted at the top, the ladder having transverse parallel bars pivoted thereto and a longitudinal standard at each end of the parallel bars,each standard being pivoted to the ends of both of said bars,and means for securing the standards in any adjusted position.
In testimony whereof I have affixed my signature in the presence of two Witnesses.
JOHN J. HOWARD.
Witnesses:
F. B. BROCK, F. J. THOMAS.
US3107700A 1900-09-25 1900-09-25 Ladder. Expired - Lifetime US666526A (en)

Priority Applications (1)

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US3107700A US666526A (en) 1900-09-25 1900-09-25 Ladder.

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US3107700A US666526A (en) 1900-09-25 1900-09-25 Ladder.

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US666526A true US666526A (en) 1901-01-22

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Family Applications (1)

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US3107700A Expired - Lifetime US666526A (en) 1900-09-25 1900-09-25 Ladder.

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095666A (en) * 1961-10-03 1963-07-02 Duncan C Killen Wide frame folding easel
US4342374A (en) * 1980-12-29 1982-08-03 Antonio Montana Ladder support
US5507364A (en) * 1993-07-14 1996-04-16 Spevak; Stephen T. Ladder leveler
US20110012002A1 (en) * 2006-08-29 2011-01-20 Steven Le Masurier Safety device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095666A (en) * 1961-10-03 1963-07-02 Duncan C Killen Wide frame folding easel
US4342374A (en) * 1980-12-29 1982-08-03 Antonio Montana Ladder support
US5507364A (en) * 1993-07-14 1996-04-16 Spevak; Stephen T. Ladder leveler
US20110012002A1 (en) * 2006-08-29 2011-01-20 Steven Le Masurier Safety device
US8382056B2 (en) * 2006-08-29 2013-02-26 Steven Le Masurier Safety device

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