US39871A - Improvement in ladders - Google Patents
Improvement in ladders Download PDFInfo
- Publication number
- US39871A US39871A US39871DA US39871A US 39871 A US39871 A US 39871A US 39871D A US39871D A US 39871DA US 39871 A US39871 A US 39871A
- Authority
- US
- United States
- Prior art keywords
- ladder
- support
- sides
- arms
- platform
- 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
- 241000612703 Augusta Species 0.000 description 4
- 201000011452 adrenoleukodystrophy Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000002184 metal Substances 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
- E06C1/02—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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S706/00—Data processing: artificial intelligence
- Y10S706/902—Application using ai with detail of the ai system
- Y10S706/928—Earth science
- Y10S706/93—Environment
Definitions
- This invention consists in the arrangement of a platform secured to arms which are con nected by a pivot to the sides of the ladder, and by a second pivot to thesides of the support, in combination'with adjustable braces, in such a manner thatthe platform can be adjusted in a level position independent of the formation of the ground on which the ladder stands and of the height at which the same is to be placed.
- A represents a ladder constructed with ver tical or longitudinal sides a and horizontal steps or rounds I), in the ordinary manner.
- a two arms, B are attached by means of a pivot or pivots, 0, so that the same can readily swing up and down on the same, and those ends of the arms 13 opposite the pivot c are secured by a pivot, d, to the upper ends of the sides 6 of the support 0.
- This support is constructed similar to a ladder, with the sides 0 and transverse bars or rounds f, and the sides of the ladder and of the support are provided at their bottom ends with metal feet g, intended to catch in the ground and prevent the ladder from slipping.
- the arms B support the platform B, which is firmly secured to their upper edges, and by adjusting the support in relation to the ladder the platform can be brought in a horizontal position, no matter whether the ground on which the ladder stands be level or not.
- the arms B, which support the platform, will turn on the pivots 0 cl, and'they will readily adjust themselves to any position into which the ladder and support may be brought.
- the ladder is held in the desired position by braces D, which are hinged to the ends of the arms B next to the support, and which are secured to the sides of the ladder A by pins h, passing through holes in the sides of the ladder and in the braces.
- Each of the braces is provided with a series of holes, to allow of adjusting the same according to the desired position of the ladder in relation to the support.
- the platform When the ladder is not used, the platform can be turned up in line with the sides of the support, and the arms and ladder folded in between said sides. thereby bringing the whole device into a small compass, so that it can be FREDERICK ALD RICH, JR.
Landscapes
- Ladders (AREA)
Description
F. ALDRICH, Jr.
, Fruit Ladder.
Patented Sept. 15, 1863.
N, PEIERS. mam-Litho ra her. Washington. D c
' invention.
UNITED STATES FREDERICK ALDRICH, JR,
PATENT OFFICE.
or AUGUSTA, MICHIGAN.
iMPROVEM-ENT lN LADDERS.
Specification forming part of Letters Patent No. 39,871. dated September 15, 1363.
T 0 all whom it may concern Be it known that I, FREDERICK ALDRICH, J r., of Augusta, in the county of Kalamazoo and State of Michigan, have invented a new and Improved Fruit-Ladder; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in which Figure 1 represents a side elevation of my Fig. 2 is a front elevation of the same.
Similar letters of reference in both figures indicate corresponding parts.
This invention consists in the arrangement of a platform secured to arms which are con nected by a pivot to the sides of the ladder, and by a second pivot to thesides of the support, in combination'with adjustable braces, in such a manner thatthe platform can be adjusted in a level position independent of the formation of the ground on which the ladder stands and of the height at which the same is to be placed. I
To enable those skilled in the art to make and use my invention, I will proceed to describe it.
A represents a ladder constructed with ver tical or longitudinal sides a and horizontal steps or rounds I), in the ordinary manner. To the upper ends of the sides a two arms, B, are attached by means of a pivot or pivots, 0, so that the same can readily swing up and down on the same, and those ends of the arms 13 opposite the pivot c are secured by a pivot, d, to the upper ends of the sides 6 of the support 0. This support is constructed similar to a ladder, with the sides 0 and transverse bars or rounds f, and the sides of the ladder and of the support are provided at their bottom ends with metal feet g, intended to catch in the ground and prevent the ladder from slipping. The arms B support the platform B, which is firmly secured to their upper edges, and by adjusting the support in relation to the ladder the platform can be brought in a horizontal position, no matter whether the ground on which the ladder stands be level or not. The arms B, which support the platform, will turn on the pivots 0 cl, and'they will readily adjust themselves to any position into which the ladder and support may be brought. The ladder is held in the desired position by braces D, which are hinged to the ends of the arms B next to the support, and which are secured to the sides of the ladder A by pins h, passing through holes in the sides of the ladder and in the braces. Each of the braces is provided with a series of holes, to allow of adjusting the same according to the desired position of the ladder in relation to the support.
When the ladder is not used, the platform can be turned up in line with the sides of the support, and the arms and ladder folded in between said sides. thereby bringing the whole device into a small compass, so that it can be FREDERICK ALD RICH, JR.
\Vitnesses SETH PRATT, GORNELTA PRATT.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US39871A true US39871A (en) | 1863-09-15 |
Family
ID=2109442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US39871D Expired - Lifetime US39871A (en) | Improvement in ladders |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US39871A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050052119A1 (en) * | 2003-09-08 | 2005-03-10 | Gang Yu | Organic electronic device having low background luminescence |
| US20180361040A1 (en) * | 2017-06-15 | 2018-12-20 | Chiaro Technology Limited | Breast pump system |
-
0
- US US39871D patent/US39871A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050052119A1 (en) * | 2003-09-08 | 2005-03-10 | Gang Yu | Organic electronic device having low background luminescence |
| US20180361040A1 (en) * | 2017-06-15 | 2018-12-20 | Chiaro Technology Limited | Breast pump system |
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