US78476A - packer - Google Patents
packer Download PDFInfo
- Publication number
- US78476A US78476A US78476DA US78476A US 78476 A US78476 A US 78476A US 78476D A US78476D A US 78476DA US 78476 A US78476 A US 78476A
- Authority
- US
- United States
- Prior art keywords
- ladder
- truss
- sides
- pieces
- bolt
- 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
- 210000003128 head Anatomy 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241001323275 Andex Species 0.000 description 1
- 240000002791 Brassica napus Species 0.000 description 1
- 101150012763 endA gene Proteins 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005728 strengthening Methods 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
- E06C1/32—Ladders with a strut which is formed as a ladder and can be secured in line with the ladder
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
Definitions
- ⁇ My invention relates to extension step-ladders, and consists of a novel arrangement for strengthening and. bracing them when extended.
- ⁇ Figure 2 is a side or edge view
- FIGS 3 and 4 are views of parts detached-.-
- the sides 'of the lower part, B I'construct of two pieces, connected at both ends, and slightly curved between, as clearly shown in the4 sameguregand make them of any length desired. Between these sides -I place the steps a, so as to connect the sides, as shown in tig. 1.
- the upper part, C which I use fora support for the lower part, B, as'shown in lig.
- hinges D asshownin ligs. 1 and 2.
- the form of these hinges is clearly shown in fig. 3.
- Thesehinges D may turn on the same pivot, by making a bolt,'Za, suiiciently lngto extend from one side of the ladder to the other, and providing it with a head on one'end anda screw-thread for anut at the other.
- An extension step-ladder consisting oV the hingedparts B, G, truss E, and chains G, constructed and arranged substantially as 'herein described.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Description
G. W. PAGKER, OF T'OULOYN, ILLINOIS.
Letters Patent No. 78,476, dated June 2, 1868.
IMPnovBD EXTENSION STEP-LADDER. 'y
tlgl rlphuh nicht in iu than: tettaf.' intmt mit mating mrt at ille sima.
T0 ALL WHOM IT MAY GONOERN:
Be it known that I, G. W. PACKER, of Toulon, in the county of Stark, and State of Illinois, -have invented certain new and useful Improvements in Extension Step-Ladders.; and I do hereby declare that the following is a. full, elear, andex `act description thereof', reference being had to the accompanying drawings, making part of this speciticationfand to the letters of reference marked thereon, like letters indicating Alike* parts wherever they occur.
t To enable others skilled in the art to construct and use my invention, I will proceed to describe it.
`My invention relates to extension step-ladders, and consists of a novel arrangement for strengthening and. bracing them when extended.
In'the drawings- Figure 1 is a perspective view.
`Figure 2 is a side or edge view; and
Figures 3 and 4 are views of parts detached-.-
I construct my extension step-ladder, A, in two parts, B C, which are hinged together, as shown in figs. l and 2, so that it may, when desired, be usedv as an ordinary or common step-ladder. The sides 'of the lower part, B, I'construct of two pieces, connected at both ends, and slightly curved between, as clearly shown in the4 sameguregand make them of any length desired. Between these sides -I place the steps a, so as to connect the sides, as shown in tig. 1. The upper part, C, which I use fora support for the lower part, B, as'shown in lig. 1, when vonly a common stepladder is required, I make in the form of an ordinary ladder, and hinge it to the lower part, B, by hinges D, asshownin ligs. 1 and 2. The form of these hinges is clearly shown in fig. 3. I make their leaves, z', long, so that several screws may be used in fastening them in place, so as to hold their position h'rmly. Thesehinges D may turn on the same pivot, by making a bolt,'Za, suiiciently lngto extend from one side of the ladder to the other, and providing it with a head on one'end anda screw-thread for anut at the other. I prefer hinging the partsot my step-ladder in this way, but, it' desired, a single bolt may be used for each hinge.
To the bolt Zz, so as to move easily about it, I attach a truss, E, made in the form of the letter'A, out otthree pieces, ed e, the pieces c and el forming the angle atf, and e the cross-piece for tying and bracing them. The lower' sidesot` the projectingr ends of the pieces e ol, Icut so as to be parallel withthe sides ot' the ladder when the truss E is lying lengthwise with it, having made the pieces c d long enough, when so cut, as to be nearly of the same widthfrom outside-to outside as the` interior of the ladder, and to these sides I attach, by screws or other suitable means, metal straps g, provided with an eye attheir lower end, for the boltb to pass through, the eye in the st'raps g being suiiciently large to allow the truss E to swingreasily about the bolt b.
About midway between the ends of the parts B C ofthe ladder, I place metal loops F, provided with an eye, h, and formed as shown in lig. 4L And through the headf of the truss E, I put a bolt, and provide it at each endA with an cye,p, and connect the eyes ofthe loops F with the head of thc truss by chains G, makingv To the the chains of the requisite length to be stretched taut when the `ladder. is extended, as shown in Iig, 2. upper part, C, and near its lower end, I placca staple, with a hook to catch' into an eye, q, as shown in tig. 2.
It is obvious that in the place of the loops F, a bolt may be used, with an eye; but as the ladder is made light, the boring et' holes in its sides would weaken it toomuch.
In using my step-ladder, extended, it'is only nccessarfto place the parts B C in a straight linc,as shown in fig. 2, and engage the hooks q. The truss E, in connection with the chains G, will atoncetake therposition shown in the same ligure, and thoroughly brace and securely hold the parts together, so that the 'ladder willbe nearly as irm and quite as safe as though its sides were made of `continuous pieces.
In this way I am able to malte a cheap,- convenicnt, and light extension step-ladder.
Having thusdescribed my invention, what I claim, is-
An extension step-ladder, consisting oV the hingedparts B, G, truss E, and chains G, constructed and arranged substantially as 'herein described.
G; W. PAGKEB..
Witnesses:
F. H; Wulmxnn. C. M.l S. LYON.
Publications (1)
Publication Number | Publication Date |
---|---|
US78476A true US78476A (en) | 1868-06-02 |
Family
ID=2147977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US78476D Expired - Lifetime US78476A (en) | packer |
Country Status (1)
Country | Link |
---|---|
US (1) | US78476A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150090530A1 (en) * | 2010-02-03 | 2015-04-02 | Steven Richard Ambriz | Curved Ladder for Tank Access |
-
0
- US US78476D patent/US78476A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150090530A1 (en) * | 2010-02-03 | 2015-04-02 | Steven Richard Ambriz | Curved Ladder for Tank Access |
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