US840636A

US840636A - Scaffold.

Info

Publication number: US840636A
Application number: US28571105A
Authority: US
Inventors: Charles E Lillow
Original assignee: CLEVELAND LADDER SCAFFOLD Co
Current assignee: CLEVELAND LADDER-SCAFFOLD Co; CLEVELAND LADDER SCAFFOLD Co
Priority date: 1905-11-03
Filing date: 1905-11-03
Publication date: 1907-01-08
Anticipated expiration: 1924-01-08

Description

.ffm-C@ No. 840,030.' PATENTED JAN. s, 1007.

' 0. E. LILLOW.

SGAFPOLD.

APPLIoATIoN FILED N0v.s.1005.

' a SHEETS-SHEET 2.

wnwfssfs.-

0 mmol? PATBNTED JAN.48,'19017.

0'. E. LILLGW.

SCAPPOLD.

APPLIOATION FILED NOV. 3, l905.

,1:.4oiiARLEs ELVLILLOW; "oF-. forzliviinnnn, loinQ.`ss-rf;non ro Vran CLEVE- '-'LANn LAnDER-scAirroLncoMPANY," on CLEVELAND, oHro,.A con:

PORATIQN onor-no.

citizen of the United States of America, re-

, siding at Cleveland, in rthe county of Cuyaf stay-bars ofthe linksin position.

.hoga and State of Ohio, have invented cer tain-new and useful Im rovements in. Scaf-' folds; and'I hereby dec aure the following to be a'full, clear,.and exact description of the linvention, such as will enablel others v:skilled in the art towhich use the same.

it pertains to make and sectional scaiiolds` The object of this invention is ing each section arranged to interlock with one tor'more ofthejbther sections, thereby securing or bolts.

the accompanying drawings.

In the accompanying drawings, Figure 1 represents a'section of a scaiiold einbodyin my invention.A Fig. 2 is'jarwdetail sectiona view illustrating the lo ing device, which' secures the horizontal sections :to the rungs of thev vertical sections. Fig. 3 is a section on line 3 3, Fig. 2. tional .view showing the means for securing one vvertical section ofthe scaffold to the vertical section next below. Fig. 5 is'anenlarged view showing method of securing la brace-.barin position. 'ig'. 6 is a section on line 6 6,Fig.l 5. Fig. r7 isa section on line .'7 7, Fig. 2. versal joint .connections whi h secures the Fig. 9 is a top planof the same. v

'By referrin tofthedratwings, it willv beseen -thatthe sca old comprises two or' more series 'of.vert1calsect10ns, 'each series being capable "of being indeinitelylengthened by the superposition of additional sections, and a number of horizontal sections, whlch serve either as`side extensions, stages, brace-bars, or connecting-links. The series of vertlcal extensions are preferably secured\together' in pairs-by the brace-bars, and the pairs are secured together by the connecting-links;

The vertical sections'aresimilar in `con.

s peccation' oi' VLetters lPatent.

This invention relates to improvements in' to provide a`-scaold of this character which' will be'- y strong, light, and easily assembled and hav-v rigid oints without the use 0f nails I Fig. 4 is a detailv sec-l Fig.18 is a side view of one ofthe unidetachablyjsecured together by means f 4Vtionand 'the lower en s ofthev sidpieces .1 of an' uppersection. 'Ihesleeves Sare pref-l erably permanently secured.l to the upper i ends Yof vthe side pieces of the respective sectionsfby bolts 4. Walls 5 are arranged the sleeves 3 between the ends of the side pieces,and on the upper surfaces ofsaid walls.

are 'arranged 'lugs 6, which extend into socketsI 7, formed in the ends of the side piecesof the upper section. f The object of the lugs and sockets is to center the ends in the vsleeves and prevent themL from 4moving' V terior dimensions ofthe sleeves. Guarde fsockets' by means of screws 9.

which form the brace-bars, leach of which vicescomprises a hollow' body portion 13 and 'sleeves`3, whichare arranged to receivethe upper ends ofthe side pieces 1 of alowerfsecf.

plates 8 are preferably sejcured around the y I I easethey are somewhat smaller than thein- My invention thereforeconsists inthe feal` `,tures of constructionand combination. of..

parts, 'as described `in the s ecification,"

.pointed out in the claims, and i ustrated in At suitable places between the vertical sections are'. arranged the horizontal sections lover a rung 2. In the top of the body porff oove or slot 15, and in thef..

bottom of the-bo y portion is formed a lon er slotl, having two'enlargements 17 of 't e same ldiameter and one enlargement 1'8 off hollow body portionfis arran greater diameter than the other two. In the eda wedgeshaped plate 19, s ovas to slidejl ieely therein, z.

and thesaid plate 19 held above the b o'ttom 'of the bodyportio'n by su ports 20, so thatthere is a space between t e lower sr.-

to tightly embrace the rung of the ladderL; 1Al

llocking-bolt is provided for holding the plate 19 in either its forward or backward position, and the said 21, which has -a botcornprises a body portion lameter equal `to `the diarne-,` ters of the enlargements 17 anden the body 8o consists of a bar 12, on the endsof which are secured clamping devices for detachably enl gaging the cross barsor-rungs .2 of the vertical sections. Eachfpf the 'clampingfdef .85 ayoke portion 14, whichis arranged toft pertion is arranged van annular shoulder or flange 22, which prevents the body portion' from'slipping through the said enlargements 17 but the said flange is smaller in diameter q than the enlargement V 18, so that the bolt may be inserted through said enlargement 18.

The bod portion 21 is provided with a studr 24, 'whic lextends into an opening '25 ,formed inthe slide'` 19. \Onf the body portion is io formed a neck portion 26, which is smaller indiameter than. thewidth of the slot 16. A

' knob.v 2,7 is; preferably secured tothe body pQ-.Ition 21er'- the bolt. A The body portion 13 islsecured. to ,the bar 12 by a rivet,`which i passes ythrough a slot in the plate 19, andthereby limits the forward movement of the vsaid plate, sothat the bolt willfnot vdrop throughthe enlargement 18.

. :The eration of the device is as-followsi z'o The upper part of the' bolt is passed through itheenlargement 18, andthe stud 24 is inserted inthe opening 25 in the plate 19. When it is desired'to move the plate 19 back orforth, the b oltis shoved up, so that the i 2 5. stud 24 projects'into the slot 15, and the neck -portionenters the slot 16, and when it is desired to lock the slide either-in its backward or forward position the bolt will be o'ver one of-the enlargements 17 and will therefore 3or drop by its own weight, andthe body portion will enterone of the said enlargemeit-s, thereby preventing any movement of the plate 19 4until the body portion is lifted outof said enlargement. In. this way avery reliable `3, 5 locking device is provided, for when the plate is in the proper position it will'be -automatically locked by the action of gravity -onthe bolt, and no shaking or .jarring of the scaffold can cause the bolt to come unfas- 4o tened. Stay-bars 29 are provided for reinforcing the brace-bars, and the lower ends thereof are secured to the rungs of the vertical sections by clamping devices similar to the clamping devices arranged on the ends y 45 of the brace-bars, and the upper ends of the stay-bars- 29 are secured tothe brace-bars by hangers, each of which consists of a plate ,30, `lhaving ears 31, which project from each side at theupper end thereof, and a' plate 32,

5.o which extends a little distance beyond the end of the stay-bar. 1

Near the end of the plate 32 is arranged a pin 33, which passes through a hole 34, formed in the brace-bar, and the location of 55 the pin on the plate 32 andthe hole in the -tically all the strain oii' of the pin 33.

bar is in an inclined osition, and the ear 31 and the end of the p ate 32 will then forni a fork, which closely embraces 'the brace-bai` and prevents it from turning orsliaking. An angular-shaped cap 35 is preferably arranged Aon the end ofthe stay-bar 29 between the plates and 32', and one face thereof abuts against the lower* surface of the brace-bai' w en the stay-bar is iii its operative position,

th'ereby'providing a rest or su port near the center of `thc` brace -ban tidges 36 are .formed on the cap and enter grooves 37 iiithe under surface of the brace-bar, which prevent the cap from slipping and take prac- To the vertical sections .are secured side extensions, vwhich comprise supporting-bars 40 fand a platform ,'41, which'extends between and 'rests on the said supporting-bar 4() Each supporting-ba:- is secured to the vertical section bymeans of links 42, having a arranged at the inner end ofthe sup 'iortiiigbar, so that the hook on the upper en thereof engages the supporting-bai' 40, and the hook on the lowerend envages'a rung 2 below the supporting-bar, and the other link is arranged nearer tlie outer end ofthe supporting-bar, and the hook on the upper end thereof is arianved to en aire the rung above the. supporting-bar, and t ieDhook on the lower end is arranged to engage with the supporting-bar. A guard 44 is pivotally secured to the links, soas to close the mouth of the hooks which engage the rungs. j

The pairsof vertical sections are secured together by link-bars 45, which are secured to the side pieces 1 ,of the vertical sections by hook 43 at each end. One of said links is lOO means of universal joints, which are constructed as follows: Around the side piece 1 isarrang-ed a U-sliaped strap 46, and atene end thereof is. ivotallly secured a latch 47, the end of which enters a groove .48 in the opposite end of the U-shaped strap 46. A clamping-.screw 47 is arranged in thestrap 46 opposite-the latch, by means of which the sti-ap can be secured to the side pieces 1. On the strap are arranged two eais 49, and on the end of the linkar 45 are arranged two ears 5(),` the ears on vthe barbeing arranged at a right angle to the ears on the strap. Between tlie ears is arranged a block 51, provided with two pairs of arms 52, arranged at a right angle to each other, and which extend into bearings 53, formed in the respective ears.' The connecting links are provided with stay-bars 55, and the upper ends of these stay-bars are secured tothe connectinglinks byhangers similar to the hangers used .for connecting therstay-bars 29 with the TIO used for connecting the connecting-links 45 with the side pieces 1. This means of couppieces of an u per vertical section, walls i arranged in sai sleeves and ings lifo:mned on said walls and arranged to `enter the ends pieces of one of the vertical seci; brace-har and the arrangement is such that 7o when the said stay-har is ina verticai position ries of vertical sections, each of said sections consisting of vertically-arranged side pieces tion the said latch will dro l weight into one of the said en argements in ling the vertical sections allows them to be connected at any angle, either `vertical `or 1; In a scaiiold, the combination of'a sel` cured together 'by cross-bars and means for securing said vertical sections together', consisting of sleeves arranged to receive the upper ends of the side pieces'of 'a iower vertical section and the lower end of the side of the side tions.

' 2. In a scaffold, the combination' oi .a sesecured together by cross-bars and'rneans for securing said vertical sections together; consisting of sleeves arranged to receive the upper ends of the side pieces Aoi-a lower seetion and thelower ends ofthe side of an upper section, lWalls arranged in said l sleeves, lugs formed on the uppersurfaces of said walls and arranged to enter the lower and means forA permanently securing .saidY sleeves to the side pieces oi' the ioiwer sections.

ries of vertical sections, each section consisting of two vertically-arranged side pieces 4secured together by cross-bars, and means for bracing two of said 'Vertical 'sections 'together comprising-a yoke portion, a hollow body por,- tion having a slot i'n the bottom with two enlargements ofthe same size, a plate arranged to slide'4 in said hollow body portion and a latchlfor locking said plate4 in said body portion, said latch consisting of a body portion approximately equal in sine to enllargel ments in the said slot, ra" neck portion ar-i ranged to enter the said slfot, :a 1arranged on the body portion and a stn-d se?"V I cured tofsaid body portion to f enter an opening in the fsa/id, late and the so A E arrangement is such that the said platev is in its innermost or outermost posiof its -own 3. In a scaffold, theconihinationiolf a se-l the said slot vand thereby lock tle plate against movement. v

4. In a scaiiold, the combination oi a 'series oi. vertical sections and means forl bracing said sections together comprising a bracebar, vmeans for securing the endsoi-said bracebar to the 4vertical sections and stay-bars for reinforcing said brama-bars, said 'staybars being provided with hangers for securingthein to nthe brace-bars, each hanger comprising'a plate arranged at one side 'of l a stay-bar and provided with two project- 6: ing ears and a plate arranged at' the opposite sideo the stay-bar and extending. above therst-mentioned plate, means for securing said last-mentioned plate to the yof the stay-hars to the vertical sections..

.5,- in a .scaoid the combination of inerti- '(4. -cal sections, means for securing said vertical 'secti-ons in pairs .and means for-'connecting 8o the pairs of vertical sections, said means comends-of the side plecesfof ripper section prising a, link, means arranged to engage the vertical sections and universal joints -arranged between the ends oi the link and the y means for engaging the vertical sections. 85 6. In a scaiold, thecornbination of vertical sections, each of said .sections lcornprising vertical side pieces secured together vby cross-hars, means ioroennecting the vertical sections in pairs, and means .for con- 9o straps;

ni @steamy wirwar I sags. 'ne foregoing speciiiation in the lpresenta); oi two witnesses CHARLES nLfILLow .Witnessesz i y VICTOR C. Lge-n, N. L. Meloinvnu..l

Ilon