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Publication numberUS623269 A
Publication typeGrant
Publication dateApr 18, 1899
Filing dateDec 6, 1898
Publication numberUS 623269 A, US 623269A, US-A-623269, US623269 A, US623269A
InventorsLouise M. Wilber
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Scaffold
US 623269 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

Patented Apr. |8 ,-l899. L. M. WILBEFL SC AF F U L D.

(Application filed Dec. 5, 1898.)

2, Sheets-Sheet I.

(No Model.)

7l i z nesses Patented Apr. l8, I899. L. m. WILBE'R.

5 C A FF 0 L D (Application filed Dec. 5, 1898.

2 Sheets-Shem 2.

(No Model.)

. UNTTED STATES PATENT Trice.

LOUISE M. \VILBER, OF BUFFALO, NEYV YORK.

SCAFFOLD.

SPECIFICATION forming part of Letters Patent N0. 623,269, dated April 18, 1899.

Application filed December 5, 1898. Serial No. 698,332- (No model.)

T0 to whom, it may concern:

Be it known that I, LOUISE M. WILBER, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Scaffolds, of which the following is a specification.

This invention relates to a scaffold which is more especially designed for house-painters, although the same is also useful in constructing buildings.

The object of my invention is to produce a sectional scaffold for this purpose which can be easily erected for use and compactly folded for storage or transportation and which can be conveniently adjusted to suit buildings of different heights and to permit a section supporting one gang of workmen to be raised and lowered independent of the other sections.

In the accompanying drawings, consisting of two sheets, Figure l is a perspective view of my improved scaffold. Fig. 2 is a fragmentary vertical section,on an enlarged scale, in line 2 2, Fig. 1. Figs. 3, 4, 5, and 6 are horizontal sections in lines 3 3, 4 4, 5 5, and 6 6, Fig. 2, respectively.

Like letters of reference refer to like parts in the several figures.

The scafiold (shown in Fig.1) consists of two sections and is arranged for painting the side of a building in two sections. In this arrangement three ladders A A A are placed vertically at the proper distance apart along the building, and two horizontal gang-planks or platforms B B" are employed for supporting the painters or workmen, the adjacent ends of both planks being supported from the middle ladder A, while the opposite ends of the planks are supported from the end ladders A A Each of these ladders is constructed in the usual way, its horizontal rounds ct being secured centrally to the side bars a thereof, so as to leave the edges thereof on opposite sides of the rounds unobstructed. Each of the ladders is supported at its lower end by a standard (3, which is adjustably connected with the lower portion of the ladder. This standard consists, essentially, of a horizontal base or supporting-block c and two vertical bars 0 c,which have their lower diverging ends 0 secured to the top of the base. The standard-bars are connected centrally by horizontal rods or rounds c so as to form a downward extension of the ladder. The distance between the standardbars is less than the distance between the ladder-bars, so that the standard-bars can be placed against the front side of the ladder rounds, between the bars thereof.

The mechanism whereby the ladder is adjustably connected with the standard is constructed as follows: guides which are secured to the opposite sides of the ladder-bars, near the lower ends thereof, and each of which is provided with a pair of jaws d d, which embrace the longitudinal edges of .one of the standard-bars, near the upper end thereof. The space between the jaws of each guide on the inner side of each standard-bar is suflicient to permit the jaws to slide upon and down on the standard-bars when adjusting the ladder vertically without the jaws striking the rounds of the standard-bars.

lVhen the ladder has been shifted lengthwise on the standard into the desired position, it is held against movement by a locking-pin d, which passes through one of a number of pairs of openings d in the standard-bars and a pair of perforated supportingarms 02 secured to the inner side of the ladder-bars and bearing against the outer side of the standard-bars, as shown in Figs. 1, 2, and 5.

The lower portion of each standard is held against displacement by means of a pair of inclined lower braces E E. These braces are preferably secured with their inner ends to the water-table of the building by screws or otherwise, and their outer ends are arranged on opposite sides of the standard and connected by a tie rod or bolt e. In order to permit the braces to be raised or lowered to suit different heights of water-tables,the outer ends of the braces are adjustably connected with the standard, so as to permit the braces to be raised or lowered on the standard. For this purpose each of the standard-bars is provided with a vertical row of adjustinglugsf, each of which has a bayonet or undercut slot f, adapted to receive the tie-bolt of the lower braces. Each lug on one standard- D D represent two bar is horizontally in line with a lug on the other standard-bar, so that the lugs of both bars are arranged in transverse pairs. Upon shifting the tie-bolt of the lower braces from 5 one pair of adjusting-lugs to another the position of these braces with reference to the standard can be adjusted vertically to suit buildings on which the height of the watertables varies.

\Vhen the scaffold is not in use, the lower braces are detached from the standard, and the latter is detached from the ladder to permit the parts to be folded compactly.

The upper end of each ladder is adjustably connected with the upper portion -of the building as follows: G represents a cylindrical guide socket or sleeve which is arranged above the upper end of the ladder and which'is provided on opposite sides with 2 a two downward ly-diverging su pportin g-arms g g, bearing against the inner sides of the ladder-bars. The supporting'arms are pivoted at their lower ends to the uppermost round of the ladder, which permits the guide-sleeve and its arms to be folded against the ladder when not in use. The guide-sleeve and its supporting-arms aresecured in an upwardlyprojecting position when the scaffold is in use by means of locking-pins g g, which pass through openings in the ladderbars and the guide-sleeve arms adjacent to the pivot of the latter.

H represents an upright pole or rod which is arranged with its central portion in the 5 guide-sleeve and is capable of sliding vertically therein. The upper end of this pole is connected by two inclined upper braces h h with the eornice-l'ioard or other part of the building. These braces are secured with 40 their inner ends to the building by screws or otherwise and are adjustably secured with their outer ends to opposite sides of the pole by a bolt 7L, which passes through one of a vertical row of openings 7L2 in the pole. The 5 lower end of the pole is provided with one or more pivoted hooks 7L3, which are adapted to engage with one or another of the upper rounds of the ladder for holding the lower end of the pole in position. By engaging the hooks 71 of the pole with a higher or lower round of the ladder and shifting the upper braces up or down on the upper end of the pole the parts may be adjusted so as to permit of attaching the upper part of the scaffold to buildings which differ in height.

I represents carriages whereby the gangplanks are adjustably supported on the ladwlers. Each of the carriages is arranged on the outer side of one of the ladder-bars and is connected near its upper and lower ends by guides i with said bar, so as to permit the carriage to slide verticallyon the bar. Each of the guides consists, preferably, of two jaws which embrace the opposite longitudinal o 5 edges of the ladder-bar, but are separated on the inner side of the bar sufficient to clear the ladder-rounds and permit the carriage to rise and fall freely. Each of the guide-jaws is provided with an antifriction-roller 'L", which bears against the adjacent longitudinal edge of a ladder-bar and permits of raising and lowering the carriage easily. The carriage is provided with a laterally-projecting supporting-bracket J, consisting of a horizontal supporting-armj and an inclined brace j.

The end of a gang-plank is placed upon the supporting-arm of the bracket and is prevented from sliding off bya stop or pin j arranged at the outer end of the arm. \Vhen the scat fold is organized for two gang-planks, a central ladder is employed having carriages on both of its bars for supporting the opposite ends of the planks, as represented in Fig. 1. It is obvious that additional planks may be employed by providing additional ladders and carriages, each intermediate ladder having two carriages, while the end ladders require only one carriage. \Vhen only one gangplank is employed, two ladders and two carriages are required. By arranging the carriages to slide on the outer side of the ladderbars two carriages can slide on opposite sides of the ladder without interfering with each other, thereby permitting each intermediate ladder to support two planks and still enable each plank to be raised and lowered independently of the other plank.

Each of the carriages, together with the respective end ofthe plank resting thereon, is raised or lowered by a cord k, passing around a pulley 7a. In order to utilize one cord and pulley for shifting either of the carriages on opposite sides of the same ladder, the pulley is connected with ahorizontally-movable supporting-arm L, and one end of the cord is provided with a detachable fastening whereby it may be connected with either of the carriages on the ladder. This fastening consists, preferably, of a hook l, secured to thecord and adapted to engage with an opening Z in the upper portion of either carriage. The supporting arm is preferably arranged to turn upon the vertical supporting-pole below the guide-sleeve, so that it can be swung toward either side of the ladder and move the pulley and its cord over the carriage which is to be shifted. The supporting-arm is held against vertical movement on the pole by pins Z passing through openings in the pole above and below the arm, a vertical row of such openings being provided to permit of adjusting the arm vertically on the pole and a washer Z being interposed between each pin Z and the adjacent side of the arm to provide a large bearing-surface.

Each of the carriages is held in its adjusted position by an automatic catch or pawl M of usual construction, pivoted to the inner side of the carriage,preferably on one of its guides, and provided at one end with a slot or mouth m, which engages with'oue of the rounds of the ladder, and at its opposite end with a weight m, whereby the catch is turned for automatically engaging its mouth with said rounds in a well-known manner.

The side bars of the standard are separated from the side bars or the ladder, and the distance from the lower ends of the ladder-bars to the base or to the ground is greater than the height of the carriages to permit the same to be applied to the ladder from the lower end'of the side bars or removed therefrom, thereby permitting the scaffold to be erected or taken down more easily and also permitting one of the two carriages to be removed from a ladder when it is desired to take down the scaffolding partially and erect the same elsewhere.

When it is desired to paint the opposing sides of two buildings simultaneously, the ladders are erected in the alley-ray or space between the two buildings, and an additional bracket M is attached to each carriage for carrying another gang-plank n, as represented in dotted lines, Figs. 2 and 8, the brackets of each carriage projecting laterally in opposite directions and supporting the planks on opposite sides of the ladder.

My improved scaffold is very durable in construction and reliable in operation and can be quickly erected and adjusted, thereby permitting the building to be painted expeditiously, whereby the cost of painting the building is reduced proportionately.

I claim as my invention- 1. The combination with the standard and the ladder of a scaffold, of a guide arranged on the ladder and embracing the standard, a supporting-arm arranged on the ladder adjacent to the standard, and a pin passing through openings in the standard and the supporting-arm of the ladder, substantially as set forth.

The combination with the standard of the scaffold provided with a pair of upright bars, of a ladder provided near its lower end with a pair of guides which loosely embrace the bars of the standard, supporting-arms arranged on the ladder adjacent to the outer side of the standard-bars, and a locking-pin passing through openings in the standardbars and in said arms of theladder, substantially as set forth.

3. The combination with the standard of the scaffold provided with a vertical row of undercut notches, of a brace adapted to engage with one or the other of said notches, substantially as setforth. 7 v

4:. The combination with the standard of the scaffold, of lugs arranged in vertical rows on the standard and each provided with an undercut slot, braces arranged on opposite sides of the standard, and a tie-rod connecting said braces and engaging with the slots of a pair of said lugs, substantially as set forth.

5. The combination with the ladder of the scaffold adapted to support a gang-plank, of

an upright supporting-pole connected with the upper central portion of the ladder, and braces connected with said pole, substantially as set forth. 7

6. The combination with the ladder of the scaffold provided at its upper end with a guide-sleeve, of a supporting-pole capable of vertical adjustment in said sleeve, and braces connected with said pole, substantially as set forth. I

'7. The combination with the ladder of the scaffold provided at its upper end with a guide-sleeve, of a supporting-pole capable of verticaladjustment in said sleeve, a hook arranged on the lower portion of the pole and engaging wit-h one of the rounds of the ladder, and braces connected with the upper end of the pole, substantially as set forth.

8. The combination with the ladder of the scaffold, of a guide-sleeve arranged above the ladder and provided with supporting-arms which are pivoted to the ladder, a supportingpole capable of sliding in said sleeve, a hook connected with the lower portion of the pole and engaging with one of the rounds of the ladder, and braces connecting with the upper portion of the pole, substantiallyas set forth.

9. The combination with the ladder of a scaffold, of two separate carriages which are mounted on the side bars of the ladder and 95 which are capable of moving vertically the full height of the side bars, whereby two separate platforms resting on the carriages may be raised and lowered independently of each other and one ladder serves to support the opposing ends of two separate platforms, substantially as set forth.

10. The combination with the ladder of the scafiold, of two plank-supporting carriages capable of independent vertical movement on opposite sides of said ladder, a shifting rope adapted to be connected with either of said carriages and passing around a pulley, and a movable support carrying said pulley, substantially as set forth. v

11. The combination with the ladder of the scaffold, of two plank-supporting carriages capable of independent vertical movement on opposite sides of said ladder, a shifting rope adapted to be connected with either of said carriages and passing around a pulley, an upright supportingpole connected with said ladder, and a horizontally-swinging arm pivoted on said pole and carrying said pulley, substantially as set forth.

12. The combination with the ladder of the scaffold and the plank-supporting carriage guided on said side bars of the ladder, of a tially as set forth.

13. The combination with the ladder of the scaffold and the plank-supporting carriages guided on the side bars of the ladder, of a standard having its upper portion narrower than the Width of the ladder and connected with the same, the lower end of said side bars being separated from the ground a distance greater than the height of the carriages to permit the latter to be placed upon the side bars or removed therefrom at the lower ends i0 of the side bars, substantially as set forth.

WVitness my hand this 23d day of November, 1898.

LOUISE M. WILBER.

Witnesses:

THEO. L. PoPP, CARL F. GEYER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2790684 *Feb 23, 1954Apr 30, 1957Sprinkel George HScaffold bracket
US2928642 *Dec 8, 1954Mar 15, 1960Safway Steel Products IncScaffold bracket
US4886139 *Aug 19, 1988Dec 12, 1989Dupont Gaston LMobile scaffold with power-operated platform elevation
US6883642 *Sep 17, 2001Apr 26, 2005Larry MattyMethod of ladder-supported scaffold erection, and ladder bracing and scaffolding system for use therewith
US7909138 *Jan 28, 2008Mar 22, 2011John R. SvehlekLadder security bracket and safety system
US8776948 *Aug 12, 2011Jul 15, 2014John R. SvehlekLadder security bracket and safety system
US20120024628 *Aug 12, 2011Feb 2, 2012Svehlek John RLadder Security Bracket and Safety System
USRE34404 *May 17, 1990Oct 12, 1993Dupont Gaston LMobile platform with power operated platform elevation
Classifications
Cooperative ClassificationE06C7/16