US251928A - Joseph d - Google Patents
Joseph d Download PDFInfo
- Publication number
- US251928A US251928A US251928DA US251928A US 251928 A US251928 A US 251928A US 251928D A US251928D A US 251928DA US 251928 A US251928 A US 251928A
- Authority
- US
- United States
- Prior art keywords
- norton
- arm
- ladder
- joseph
- rounds
- 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
- 230000001788 irregular Effects 0.000 description 4
- 210000003414 Extremities Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/48—Ladder heads; Supports for heads of ladders for resting against objects
Definitions
- PETERS PhOlwLllhOgriphOI. Walhirvglnn. D. C.
- Our invention consists in providing ladders at their upper ends with a central arm clamped onto the upper rounds to act as a pivot to permit the bottom of the ladder to stand square upon the ground when the ladder is placed against any oblique or irregular object, ike the limb or crotch of a tree.
- the arm may be of any suitable length, and it is secured to the rounds preferably by means of the clamp-plate c, which plate is adapted to be secured to the arm upon the opposite side of the rounds by the bolts 0e and the thumb-nuts t 2'.
- the arm B may be removed from the ladder and replaced at pleasure.
- a ladder provided with this arm may be set up against any irregular surface or object, and the arm acting as a pivot will permit both side bars ,of the ladder to find a square and firm support upon the ground.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Description
J. D. 8v L. M. NORTON.
ATTACHMENT, FOR LADDERS.
Patented Jan. 13,1882.
(No Model.)
, WITNESSES: I Q INVENTOR:
ATTORNEYS.
N, PETERS. PhOlwLllhOgriphOI. Walhirvglnn. D. C.
UNITED STATES PATENT OFFICE.
JOSEPH D. NORTON AND LEONARD M. NORTON, OF LOUDVILLE, MASS.
ATTACHMENT FOR LADDERS.
SPECIFICATION forming part of Letters Patent No. 251,928, dated January 3, 1852.
Application filed October 5, 1881. (No model.) I
To all whom it may concern:
Be it known that we, JOSEPH D. NORTON and LEONARD M. NORTON, of Loudville, in the county of Hampshire and State of Massachusetts, have invented an Improved Attachment for Ladders, of which the following is a full, clear, and exact description.
Our invention consists in providing ladders at their upper ends with a central arm clamped onto the upper rounds to act as a pivot to permit the bottom of the ladder to stand square upon the ground when the ladder is placed against any oblique or irregular object, ike the limb or crotch of a tree.
Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding pans in both the figures.
Figure l is a plan View of our invention; and Fig.2 is a sectional elevation of the same, taken on line as .r of Fig. 1.
A represents theladder, which is ofordinary construction; and B represents the arm, which is secured to the two top rounds of the ladder in the center of the rounds, as shown. The
arm may be of any suitable length, and it is secured to the rounds preferably by means of the clamp-plate c, which plate is adapted to be secured to the arm upon the opposite side of the rounds by the bolts 0e and the thumb-nuts t 2'. By this means the arm B may be removed from the ladder and replaced at pleasure.
A ladder provided with this arm may be set up against any irregular surface or object, and the arm acting as a pivot will permit both side bars ,of the ladder to find a square and firm support upon the ground.
Having thus fully described our invention,
JOSEPH DRANOES NORTON. LEONARD MARSHALL NORTON.
Witnesses:
ALBERT E. METCALF, FRED. A. STOOKWELL.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US251928A true US251928A (en) | 1882-01-03 |
Family
ID=2321227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US251928D Expired - Lifetime US251928A (en) | Joseph d |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US251928A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4533018A (en) * | 1983-07-07 | 1985-08-06 | Tyson Sammie J | Ladder support |
-
0
- US US251928D patent/US251928A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4533018A (en) * | 1983-07-07 | 1985-08-06 | Tyson Sammie J | Ladder support |
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