US411824A - Scaffold - Google Patents
Scaffold Download PDFInfo
- Publication number
- US411824A US411824A US411824DA US411824A US 411824 A US411824 A US 411824A US 411824D A US411824D A US 411824DA US 411824 A US411824 A US 411824A
- Authority
- US
- United States
- Prior art keywords
- scaffold
- sections
- section
- pulleys
- winch
- 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
- 239000002965 rope Substances 0.000 description 14
- 238000010276 construction Methods 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/18—Scaffolds primarily resting on the ground adjustable in height
- E04G1/20—Scaffolds comprising upright members and provision for supporting cross-members or platforms at different positions therealong
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
- E04G2001/157—Extensible platforms, e.g. telescopic platforms
Definitions
- This invention relates to an extensible scaffold that may be raised or lowered by a winch which is secured to the scaffold.
- FIG. 1 is a side elevation of my improved scait'old.
- Fig. 2 is a top View thereof; Fig. 3, a bottom View thereof; Fig. ,4, an enlarged end elevation; and Fig. 5, an enlarged cross-section on the lines was, Figs. 1, 2, and 3.
- the letter a represents the ladder forming the central section of my improved scaffold.
- b b are the sliding end sections, secured to the section (I, by means of hooks c, that are secured to the section Z) and embrace the upper edge of section a.
- sections 12 are provided with a metallic frame g, Fig. 4:, bolted to the sections 1) by bolts g.
- the frames 9 carry pulleys g at their lower face. At their upper ends the frames g have the perforations g
- the ropes 6 pass over the pulleys g and thence upward. through perforations to be finally secured to the scaffold-suspending hooks.
- W'h at I claim is 1.
- a sectional scaffold composed of central section a and sliding end sections Z), with a winch mounted on section a, and with the frames g, secured to sect-ions b, and with the downwardly-projecting pulleysf g and a rope c, passing from the Winch first downward, thence around pulleys f, thence beneath sections a b, and thence around pulleys 9 substantially as specified.
- section a carrying winch and pulleys f, with sections Z), hooks c, and pins 0, and with the end frames 9', having pulleys g and perforations and with rope e, passing from the winch over pulleys f 9 and through perforations 9 substantially as specified.
Description
2 Sheets-Sheet 1.
(No Model.)
A. MULLER.
SGAFFOLD.
110.411.824. Patented Dot. 1, 1889.
WITNEEEEE w, Pawns Phma-uthcyaphcr. Wasnmgion, 0. c.
(No Model.)
SGAPFOLD.
No. 411,824. Patented Oct. 1, 1889.
lNVENTElR a Mu WITNESSES N. PETERS. Phofuiilhcgmphe Wavmwun D. C.
UNITED STATES PATENT OEEicE.
AUGUST MULLER, OF BROOKLYN, NEIV .YORK.
SCAFFOLD.
SPEUIFIGATION forming part of Letters Patent No. 411,824, dated October 1, 1889. Application filed May 25, 1889. Serial No. 312,148. (No model.)
To all whom it may concern:
Be it known that 1, AUGUST MiiLLEn, of Brooklyn, New York, have invented an Improved Scaffold, of which the following is a specification.
This invention relates to an extensible scaffold that may be raised or lowered by a winch which is secured to the scaffold.
The invention consists in the various features of improvement more fully pointed out in the claims.
In the accompanying draWingS Figure 1 is a side elevation of my improved scait'old. Fig. 2 is a top View thereof; Fig. 3, a bottom View thereof; Fig. ,4, an enlarged end elevation; and Fig. 5, an enlarged cross-section on the lines was, Figs. 1, 2, and 3.
The letter a represents the ladder forming the central section of my improved scaffold.
b b are the sliding end sections, secured to the section (I, by means of hooks c, that are secured to the section Z) and embrace the upper edge of section a.
By drawing sections 7) out more or less the length of the scaffold may be adjusted. The hooks c are perforated for the reception of pins 0', Fig. 2, the shanks of which likewise enter perforations a, of section a. Thus the pins serve to interlock the sections a b when adjusted. From section a there pro ject upwardly two bearings d for a winch, the drum d of which is operated by a crank (1 through intermediate gearing d engaged by click (1". From drum (1' the suspensionropes c first pass downward through section (1., and then around pulleys f, projecting beneath the lower surface-of said section. Thence the ropes epass centrally beneath section a and the sections 1) until they reach the ends of sections 1). Here sections 12 are provided with a metallic frame g, Fig. 4:, bolted to the sections 1) by bolts g. The frames 9 carry pulleys g at their lower face. At their upper ends the frames g have the perforations g The ropes 6 pass over the pulleys g and thence upward. through perforations to be finally secured to the scaffold-suspending hooks.
It will be seen that by my construction the ropes e pass beneath the three sections b a b, and as the ropes are always held perfectly taut by the weight of the scaffold they serve to brace or strengthen the entire device. This is of course particularly desirable in an extensible sectional scaffold.
In order to keep the scaffold at the proper distance from the house-front, I employ the friction-rollers h, journaled to perforated bars 1 These bars slide in U-shaped staples r1, attached to the lower side of sections 1). Above bars 1' the sections 1) are perforated for the admission of pins r such pins likewise engaging the perforations of bars 1'. Thus the friction-rollers h may be slid in or out to any desired position, and may then be locked in place. In this way the scaffold may be made to readily clear a cornice or other projection on a house-front.
W'h at I claim is 1. The combination of a sectional scaffold composed of central section a and sliding end sections Z), with a winch mounted on section a, and with the frames g, secured to sect-ions b, and with the downwardly-projecting pulleysf g and a rope c, passing from the Winch first downward, thence around pulleys f, thence beneath sections a b, and thence around pulleys 9 substantially as specified.
2. The combination of section a, carrying winch and pulleys f, with sections Z), hooks c, and pins 0, and with the end frames 9', having pulleys g and perforations and with rope e, passing from the winch over pulleys f 9 and through perforations 9 substantially as specified.
3. The combination of the following elements: a central section a, adjustable end sections 12, perforated frames g, secured to sections b by bolts g, pulleys f 9 a winch, a rope e, and friction-rollers h, secured to adjustable bars 2', substantially as specified.
AUGUST MULLER. lVitnesses:
p F. v. BRIEsEN, WM. WAGNER.
Publications (1)
Publication Number | Publication Date |
---|---|
US411824A true US411824A (en) | 1889-10-01 |
Family
ID=2480756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US411824D Expired - Lifetime US411824A (en) | Scaffold |
Country Status (1)
Country | Link |
---|---|
US (1) | US411824A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005014954A1 (en) * | 2003-08-08 | 2005-02-17 | Karl Dorn | Adjustable length plank assembly |
FR2937356A1 (en) * | 2008-10-22 | 2010-04-23 | Xavier Marie Lombard | Telescopic floor element i.e. telescopic extension, for e.g. scaffolding field, has end fixed with traction cable, where translational movement of element is actuated by hand winch that is actuated by dismountable handle |
-
0
- US US411824D patent/US411824A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005014954A1 (en) * | 2003-08-08 | 2005-02-17 | Karl Dorn | Adjustable length plank assembly |
FR2937356A1 (en) * | 2008-10-22 | 2010-04-23 | Xavier Marie Lombard | Telescopic floor element i.e. telescopic extension, for e.g. scaffolding field, has end fixed with traction cable, where translational movement of element is actuated by hand winch that is actuated by dismountable handle |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US411824A (en) | Scaffold | |
US775373A (en) | Self-supporting and extension ladder elevator. | |
US537631A (en) | cooper | |
US418827A (en) | Half to louis boisseau | |
US494073A (en) | August necker | |
US510057A (en) | Ladder-scaffold | |
US197709A (en) | Improvement in fire-escapes | |
US329695A (en) | Baggage-elevator | |
US208852A (en) | Improvement in scaffolds | |
US391854A (en) | Swinging scaffold | |
US800806A (en) | Adjustable scaffold. | |
US266062A (en) | Charles f | |
US501406A (en) | campbell | |
US878863A (en) | Stairway for fire-escapes, &c. | |
US177477A (en) | Improvement in painters scaffold-chairs | |
US109232A (en) | Improvement in elevators | |
US302278A (en) | Livan | |
US323152A (en) | Painter s scaffold | |
US537638A (en) | Wagon-box lifter | |
US202876A (en) | Improvement in elevating-ladders | |
US588307A (en) | Device for raising or lowering coffins | |
US361202A (en) | aenold | |
US131042A (en) | Improvement in ladder-platforms | |
US170330A (en) | Improvement in vats for tanning leather | |
US465157A (en) | Hay-stacker |