US137948A - Improvement in extension-ladders - Google Patents
Improvement in extension-ladders Download PDFInfo
- Publication number
- US137948A US137948A US137948DA US137948A US 137948 A US137948 A US 137948A US 137948D A US137948D A US 137948DA US 137948 A US137948 A US 137948A
- Authority
- US
- United States
- Prior art keywords
- ladders
- extension
- improvement
- braces
- 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
- 238000010276 construction Methods 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
- 230000000284 resting Effects 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
- E06C1/38—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
Definitions
- This invention relates to the construction of a ladder, so arranged that the extension of the same may be above the plat form, or horizontallyin any direction, so that the position of the ladder need not be changed.
- the invention consists in the combination and arrangement of the various parts, as more fully hereinafter set forth and described.
- A represents two ladders of equal length, connected at top by engagement with the upper round I).
- a brace, B prevents these ladders from being displaced when in use.
- the side pieces of these ladders are provided with adjustable feet (J, held in any desired position by means of the teeth, loops, and cams or wedges, as shown, for the purpose of adapting the ladder to inequalities of. the surface upon which it stands.
- D is a platform, pivoted to the upper round I) of the ladders, and whose outer end rests upon braces b, which,
- F is another section of ladder, the lower end of which, by any suitable means, is secured or pivoted, as shown in Fig. 1, to the upper round a, and secured in its upright position by the braces G, the lower ends thereof engaging with the platform, as shown, or with one of the rounds of the ladders A; or, as shown in Fig. 2, the lower ends of the section F may engage with the round or bolt 61 of the platform, and extend outward on the same plane of the platform, the braces G- resting upon the ground to sustain it. It is so arranged that this section may be extended in any directiona great desideratum in fruitpicking.
- extension F In combination with two ladders, A, the extension F, arranged as described, in order that it may be extended in any desired direction, substantially in the manner and for the purposes set forth.
Landscapes
- Ladders (AREA)
Description
W. 060 N NOR.
Extension-Ladders.
Patented April 15, 1873.-
M "g 1% R 2 MM AM PHOTO-LITHOGRAPHIC 00. N Massamvs's macsss) UNITED STATES PATENT QFFICE.
WILLIAM OGONNOR, OF .BERVILLE, MICHIGAN.
IMPROVEMENT IN EXTENSION-LADDERS.
Specification forming part of Letters Patent No. 137,948, dated April 15, 1873 application filed September 19, 1872.
.To all whom it may concern:
Be it known that I, WILLIAM OGoNNoR, of
' ure.
The nature of this invention relates to the construction of a ladder, so arranged that the extension of the same may be above the plat form, or horizontallyin any direction, so that the position of the ladder need not be changed. The invention consists in the combination and arrangement of the various parts, as more fully hereinafter set forth and described.
In the accompanying drawing, A represents two ladders of equal length, connected at top by engagement with the upper round I). A brace, B, prevents these ladders from being displaced when in use. At their bottom ends the side pieces of these ladders are provided with adjustable feet (J, held in any desired position by means of the teeth, loops, and cams or wedges, as shown, for the purpose of adapting the ladder to inequalities of. the surface upon which it stands. D is a platform, pivoted to the upper round I) of the ladders, and whose outer end rests upon braces b, which,
in turn, rest upon one of the lower rounds of one of the ladders, the lower ends of said braces being properly notched to hold them in place. 6 e are loops, to receive a loose round or bolt, d, for the purposes hereinafter described. F is another section of ladder, the lower end of which, by any suitable means, is secured or pivoted, as shown in Fig. 1, to the upper round a, and secured in its upright position by the braces G, the lower ends thereof engaging with the platform, as shown, or with one of the rounds of the ladders A; or, as shown in Fig. 2, the lower ends of the section F may engage with the round or bolt 61 of the platform, and extend outward on the same plane of the platform, the braces G- resting upon the ground to sustain it. It is so arranged that this section may be extended in any directiona great desideratum in fruitpicking.
That I claim as my invention, and desire to secure by Letters Patent, is-
1. In combination with two ladders, A, the extension F, arranged as described, in order that it may be extended in any desired direction, substantially in the manner and for the purposes set forth.
2. The arrangement of the ladders A F, braces B G, adjustable feet (J, and platform D, (the latter being provided with loops E and bolt d,) substantially as described, and for the purposes set forth.
\VILLIAM OOONNOR.
Publications (1)
Publication Number | Publication Date |
---|---|
US137948A true US137948A (en) | 1873-04-15 |
Family
ID=2207362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US137948D Expired - Lifetime US137948A (en) | Improvement in extension-ladders |
Country Status (1)
Country | Link |
---|---|
US (1) | US137948A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090080402A1 (en) * | 2005-10-31 | 2009-03-26 | Kimihiko Imamura | Wireless receiver |
WO2022187473A2 (en) | 2021-03-03 | 2022-09-09 | Voyager Therapeutics, Inc. | Controlled expression of viral proteins |
-
0
- US US137948D patent/US137948A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090080402A1 (en) * | 2005-10-31 | 2009-03-26 | Kimihiko Imamura | Wireless receiver |
WO2022187473A2 (en) | 2021-03-03 | 2022-09-09 | Voyager Therapeutics, Inc. | Controlled expression of viral proteins |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US137948A (en) | Improvement in extension-ladders | |
US141126A (en) | Improvement in ladders | |
US579437A (en) | Udder | |
US196679A (en) | Improvement in combined ladder and steps | |
US281977A (en) | Adjustable ladder | |
US1323227A (en) | Convertible jtepladder | |
US140286A (en) | Improvement in fruit-ladders | |
US159126A (en) | Improvement in step-ladders | |
US666526A (en) | Ladder. | |
US150888A (en) | Improvement in firemen s ladders | |
US1251761A (en) | Ladder. | |
US1033389A (en) | Scaffold. | |
US157414A (en) | Improvement in step-ladders | |
US239876A (en) | Geobge w | |
US390687A (en) | Jesse b | |
US55817A (en) | Improved step-ladder | |
US238067A (en) | Ladder | |
US199922A (en) | Improvement in step-ladders | |
US130549A (en) | Improvement ih ladders | |
US100219A (en) | Improved fruit-ladder | |
US1159299A (en) | Mechanic's trestle. | |
US151150A (en) | Improvement in scaffolds | |
US156475A (en) | Improvement in combined step-ladders and wash-benches | |
US101789A (en) | Melzee tuell | |
US164442A (en) | Improvement in extension-ladders |