US123834A - Improvement in extension ladders - Google Patents
Improvement in extension ladders Download PDFInfo
- Publication number
- US123834A US123834A US123834DA US123834A US 123834 A US123834 A US 123834A US 123834D A US123834D A US 123834DA US 123834 A US123834 A US 123834A
- Authority
- US
- United States
- Prior art keywords
- improvement
- extension ladders
- extension
- ladders
- crank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010276 construction Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 1
Images
Classifications
-
- 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
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
Definitions
- This invention relates to the construction of ladders, which may be extended in length; and it consists in the construction, arrangement, and co nibin ation of parts hereinafter described.
- Figure 1 is a plan View of the ladder.
- Fig. 2 is a longitudinal section of Fig. 1 taken on the line a; or.
- This extension ladder consists of two parts, A. being the stationary part and B the movable part, which latter is made to slide up and down between the side pieces of the stationary part.
- 0 represents friction-rollers attached to the stationary part A by bolt-irons D.
- E is a a roller, which is fast on the crank-shaft F. This shaft passes through and revolves in the side pieces G G of the part A. This roller is placed between the two pairs of the frictionrollers O, and the movable part B is confined and works up and down between them, as seen in the drawing, the sides of the part B being in contact with all the rollers.
- H is a crank, to which may be attached a rod, I, by which the rollenE may be revolved to raise or lower the part B.
Landscapes
- Ladders (AREA)
Description
L. N. MlLLENER. Improvement in Extension Ladders. I No.123,834, Patented Feb.20,1872.
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UNITED STATES PATENT OFFICE.
LOUIS N. MILLENER, OF ADAMS BASIN, NEW YORK.
IMPROVEMENT lN EXTENSION LADDERS.
- Specification describing a new and useful Improvement in Extension Ladders, invented by LOUIS N. MILLENER, of Adams Basin, in the county of Monroe and State of New'York.
This invention relates to the construction of ladders, which may be extended in length; and it consists in the construction, arrangement, and co nibin ation of parts hereinafter described.
In the accompanying drawing, Figure 1 is a plan View of the ladder. Fig. 2 is a longitudinal section of Fig. 1 taken on the line a; or.
Similar letters of reference indicate corre sponding parts.
This extension ladder consists of two parts, A. being the stationary part and B the movable part, which latter is made to slide up and down between the side pieces of the stationary part. 0 represents friction-rollers attached to the stationary part A by bolt-irons D. E is a a roller, which is fast on the crank-shaft F. This shaft passes through and revolves in the side pieces G G of the part A. This roller is placed between the two pairs of the frictionrollers O, and the movable part B is confined and works up and down between them, as seen in the drawing, the sides of the part B being in contact with all the rollers. H is a crank, to which may be attached a rod, I, by which the rollenE may be revolved to raise or lower the part B. [Wis-will be seen, may be done from the ground, so that a person on the ladder may be elevated to exactly the required height by another person below. J is a hook on the top round of the stationary part A for holding the other part B in any required position. The friction-roll er boltirons I) are fastened through the sides of the part A by screw-nuts, so that there may be more or less friction on the part B. The construction and arrangcmentis plainly seen in the drawing.
Having thus described my invention, I claim as new and desire to secure by Letters Patent The roller E, crank H, friction-rollers G, and crank-rod I, when the same are arranged in combination with the parts of an extension ladder, to operate as and for the purpose described.
LOUIS N. MILLENER.
Witnesses J. H. BAXTER, L. O. WARD.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US123834A true US123834A (en) | 1872-02-20 |
Family
ID=2193268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US123834D Expired - Lifetime US123834A (en) | Improvement in extension ladders |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US123834A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD310918S (en) | 1988-10-24 | 1990-10-02 | Revlon, Inc. | Combined brush and powder dispenser |
-
0
- US US123834D patent/US123834A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD310918S (en) | 1988-10-24 | 1990-10-02 | Revlon, Inc. | Combined brush and powder dispenser |
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