US131042A - Improvement in ladder-platforms - Google Patents

Improvement in ladder-platforms Download PDF

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US131042A
US131042A US131042DA US131042A US 131042 A US131042 A US 131042A US 131042D A US131042D A US 131042DA US 131042 A US131042 A US 131042A
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section
ladder
improvement
platforms
sections
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    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/12Lifts or other hoisting devices on ladders

Description

C. WOLF. Improvement in Ladder-Platforms.

Pa tented Sep.3, 1872.

Witnesses.

AM. morn-uruacnmwc mmx/osaa/(wrx PROCESS) UNITED STATES GLEMENOE WOLF, OF WILMORE, PENNSYLVANIA.

IMPROVEMENT IN LADDER-PLATFORMS.

Specification forming part of Letters Patent No. 131,042, dated September 3, 1872.

To all whom it may concern:

-Be it known that I, GLEMENoE WOLF, of Wilmore, in the county of Gambria and State of Pennsylvania, have invented a new and valuable Improvement in Extension Ladder; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing making a part of this specification, and to the letters and figures of reference marked thereon.

The figure of the drawing is a representation of a central vertical longitudinal section of my ladder.

This invention has relation to ladders for the use of. painters, tinners, 8m; and the novelty consists ina sliding platform working in connection with an extensible ladder, and so arranged as to be rendered adjustable to suit the nature of the work, as hereinafter described.

Referring to the accompanying drawing, A A A represent, respectively, the three adjustable sections of an extension ladder adapted to slide, one between the sides of the other, and guided by means of the metallic flanged guides B, the cross-braces G, and the foot-rounds D. E designatestransverse bars arranged near the upper ends of the sections A A and provided with the pulley-rollers (1,

'over each of which passes a cord, (1 d having one end secured to a lower round of the next higher section, and the other end brought down and tied to one of the rounds or crossbraces of its own section or wound around a crank-shaft, F, journaled to the sides of the section A, as shown in the drawing. The

movable sections A A are elevated by draw ing on the cords d d or by winding the latter up on the crank-shaft. At the. top of the section A is shown an adjustable bracket or platform, having the side bars H, horizontal arms I, and boards K. The last-mentioned rest on the arms I and are separated by the side bars H, allowing space between them for the section A 'to slide up and down. L L designate flanged guides secured to the bars H and adapted to embrace the edges of the side bars of the section A M indicates curved braces extending from the lower guides L laterally and upward to the arms I, to which they are secured and serve as supports. The guides L and braces M are in one piece, as shown, and are thus secured to the bars H .by the same fastenings. At various points along the sides of the section A holes a are bored to receive a rod, m, which is inserted through the side bars H, and is designed for the purpose of sustaining the foot platform at any desirable place along the section A. When all the sections of the ladder are adjusted for extension, or when they are extended, the ladder must be supportedby a wall or some equivalent body; but it may be desirable or necessary sometimes to elevate the ladder where there is no wall. In such cases the section A may be disconnected from the other sections and then hinged to the top of the section A by means of arod, h, passing through holes in the section A and through staples in the sec tion A. The cord 01 is then used to regulate the divergence of the section A from the section A by tying its end to the rounds or crossbars, as shown in the drawing. In the position described the section A willserve to brace the other sections. 0 designates a hook on the end of the ropes d (1 so that when the ropes are passed over the rollers 11 they may be readily attached to one of the rounds or crossbars of the section to be raised.

I claim as my invention- In a painters ladder the sliding platform ,composed of the board K, cheeks H, braces M, guides L L, and horizontal arms I, in combination with rod m, and the sliding section A", having its sides perforated, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

CLEMENOE WOLF. Witnesses:

J OHN F. BARNES, J OHN G. KELLER.

US131042D Improvement in ladder-platforms Expired - Lifetime US131042A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5544718A (en) * 1995-03-31 1996-08-13 Schumacher; Lawrence H. Ladder lift with swivel tray
US20080095158A1 (en) * 2004-03-26 2008-04-24 Hiroaki Nakazawa Router and sip server

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5544718A (en) * 1995-03-31 1996-08-13 Schumacher; Lawrence H. Ladder lift with swivel tray
US20080095158A1 (en) * 2004-03-26 2008-04-24 Hiroaki Nakazawa Router and sip server

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