US199556A - Improvement in ladders - Google Patents
Improvement in ladders Download PDFInfo
- Publication number
- US199556A US199556A US199556DA US199556A US 199556 A US199556 A US 199556A US 199556D A US199556D A US 199556DA US 199556 A US199556 A US 199556A
- Authority
- US
- United States
- Prior art keywords
- ladder
- ladders
- improvement
- sections
- knight
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- 241000382509 Vania Species 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/52—Ladders in general with non-rigid longitudinal members
- E06C1/56—Rope or chain ladders
Definitions
- the object of my invention is to construct a cheap, strong, and portable ladder of iron or other metal-an object which I attain in the following manner, reference being had to the accompanying drawing, in which- Figure l is a front view of my improved ladder; Fig. 2,a vertical section of the same; and Fig. 3, a perspective view of one of the The ladder consists of sections A, connected together by links B- Each of the sections A consists of a single rod or bar of iron orsteel, bent so as to form a rectangular frame, with horizontal portions a a, vertical portions 11 Z), and an eye, d, at each corner.
- the ends of the bar are united either by soldering them together, as at w, by the use of a sleeve or socket, as at y, or by eyes, as at 10.
- Each of the links B has an eye ateach end
- these eyes being adapted to the adjacent eyes at the corners of the sections A, the connection being such that the ladder can be folded up into a compact mass when necessary.
- the ladder is preferably provided at the top with a triangular link, D, having an eye, 6, by means of which the ladder may be suspended to-any desired object.
- the sections A made in a single piece, add greatly to the strength of the ladder, and can be rapidly and cheaply manufactured by suitable machinery.
- I claim as my invention A ladder in which links B, having eyes at both ends, are combined with sections A, each made of a single rod or bar of metal, bent so as to form horizontal portions a a, vertical portions b b, and an eye, at, at each corner, as specified.
Description
J A. R. W; KNIGHT.
Ladder.
N PETERS. PHOTO -LITH6GRAPN u, WASHINGTON. D1 01 sections.
UNITED STATES PATENT OFFICE.
AARON R. W. KNIGHT, OF PHILADELPHIA, (SOMERTON P. 0.,) PA.
IMPROVEMENT lN LADDERS.
Specification forming part of Letters Patent No. 199,556, dated January 22, 1878; application filed October 1, 1877.
To all whom it may concern Be it known that I, AARON R. W. KNIGHT, of Philadelphia, (Somerton P. O.,) Pennsyl- Vania, have invented a new and useful Improvement in Ladders, of which the following is a specification:
The object of my invention is to construct a cheap, strong, and portable ladder of iron or other metal-an object which I attain in the following manner, reference being had to the accompanying drawing, in which- Figure l is a front view of my improved ladder; Fig. 2,a vertical section of the same; and Fig. 3, a perspective view of one of the The ladder consists of sections A, connected together by links B- Each of the sections A consists of a single rod or bar of iron orsteel, bent so as to form a rectangular frame, with horizontal portions a a, vertical portions 11 Z), and an eye, d, at each corner.
The ends of the bar are united either by soldering them together, as at w, by the use of a sleeve or socket, as at y, or by eyes, as at 10.
Each of the links B has an eye ateach end,
these eyes being adapted to the adjacent eyes at the corners of the sections A, the connection being such that the ladder can be folded up into a compact mass when necessary.
The ladder is preferably provided at the top with a triangular link, D, having an eye, 6, by means of which the ladder may be suspended to-any desired object.
The sections A, made in a single piece, add greatly to the strength of the ladder, and can be rapidly and cheaply manufactured by suitable machinery.
I claim as my invention A ladder in which links B, having eyes at both ends, are combined with sections A, each made of a single rod or bar of metal, bent so as to form horizontal portions a a, vertical portions b b, and an eye, at, at each corner, as specified.
In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.
AARON R. W. KNIGHT.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US199556A true US199556A (en) | 1878-01-22 |
Family
ID=2268963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US199556D Expired - Lifetime US199556A (en) | Improvement in ladders |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US199556A (en) |
-
0
- US US199556D patent/US199556A/en not_active Expired - Lifetime
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