US161059A - Improvement in step-ladders - Google Patents
Improvement in step-ladders Download PDFInfo
- Publication number
- US161059A US161059A US161059DA US161059A US 161059 A US161059 A US 161059A US 161059D A US161059D A US 161059DA US 161059 A US161059 A US 161059A
- Authority
- US
- United States
- Prior art keywords
- ladder
- frame
- hinged
- shelf
- ladders
- 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
- 230000006978 adaptation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 210000000629 knee joint Anatomy 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
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/39—Ladders having platforms; Ladders changeable into platforms
- E06C1/393—Ladders having platforms foldable with the ladder
Definitions
- the device is a folding step-ladder, with a ⁇ folding shelf attached thereto, making use of adaptations of the principle of the toggle or knee joint for the adjustment of the ladder and of ⁇ the shelf for use.
- I denote the Whole of the ladder proper by the letter a, to which ladderis hinged the supporting-frame b.
- the frame b When the ladder is adjusted for use the frame b is swung out, as shown in Fig. l; when folded up, the ladder and the frame lie together, as shown in Fig. 2.
- the free ends of the ladder and frame are connected by the two pieces c c, hinged, respectively, to the ladder and frame, and also hinged together, thus constituting a knee or toggle joint, and it is set centrally of the ladder and frame, so as to dispense with the necessity for more than one of these joints.
- the shelf d is hinged to the frame b, and is connected to one of the cross-bars of this frame by toggle-joint parts e c, hinged at the ends and hinged together.
Landscapes
- Ladders (AREA)
Description
W4. L. PTTEH'.J
- Step-Ladder. y 10,161,059 l PPPPPP ed, MMMMM 23,1375.
. @ffii/2766565, I I -c/M/far MM @4472i A y@ ff/fm F@ a. mM 5y am. 4W
UNITED STATES WILSON L. POTTER, OF HARTFORD, CONNECTICUT.
IMPROVEMENT IN STEP-LADDERS.
Specification forming part of Letters Patent No. 161,059, dated March 23, 1875 application :filed January 25, 1875.
To all whom it may concern:
Beit known that I, WILsoN L. POTTER, of Hartford, in the county of Hartford and State of Connecticut, have invented an Improved Combined Step-Ladder and Shelf, of which the following is a specification, reference being had to the accompanying drawing, where- Figure l is a perspective view of a step-ladder and shelf combined embodying my said improvements. Fig. 2 is a View of the same, folded up, in longitudinal section, the plane of the section being one side or off the center. The shelf is not folded down.
The device is a folding step-ladder, with a `folding shelf attached thereto, making use of adaptations of the principle of the toggle or knee joint for the adjustment of the ladder and of `the shelf for use.
I denote the Whole of the ladder proper by the letter a, to which ladderis hinged the supporting-frame b. When the ladder is adjusted for use the frame b is swung out, as shown in Fig. l; when folded up, the ladder and the frame lie together, as shown in Fig. 2. The free ends of the ladder and frame are connected by the two pieces c c, hinged, respectively, to the ladder and frame, and also hinged together, thus constituting a knee or toggle joint, and it is set centrally of the ladder and frame, so as to dispense with the necessity for more than one of these joints. The shelf d is hinged to the frame b, and is connected to one of the cross-bars of this frame by toggle-joint parts e c, hinged at the ends and hinged together.
The use of these togglejoints for these purposes has peculiar practical advantages: When the apparatus is folded up there are no loose or dangling ends or pieces to be knocked or broken oi; the apparatus folds up in the most compact possible manner 5 the ends of the joints being connected permanently to other parts, an uninstructed user has no difculty in adjusting the device for use or in folding it up-he can make no mistake; the adjustments are accomplished by a single movement; the construction is a strong and sure one; and withal it is cheap.
I claim as my invention- The combination of the ladder a, the hinged frame b, the centrally-set toggle-joint c, the hinged shelf d, and the toggle-joint c, all substantially as and for the purpose set forth.
l WILSON L. POTTER.
Witnesses: v
WM. E. SIMoNDs, JAs. S. BAIsDEN.
PATENT QEFIG.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US161059A true US161059A (en) | 1875-03-23 |
Family
ID=2230468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US161059D Expired - Lifetime US161059A (en) | Improvement in step-ladders |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US161059A (en) |
-
0
- US US161059D patent/US161059A/en not_active Expired - Lifetime
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