US1776950A - Adjustable scaffold - Google Patents

Description

Sept. 30, 0- K. MARCINAUSKAS I 1,776,950

ADJUSTABLE SCAFFQLD I Filed Jan. 28, 1929 2 Sheets-Sheet 1 1 5 9 g\ A 5 y 2 ''d g 9/4 ay Y V v V5 71:7

Kazz'mer Harcznauskqs A? Patented Sept. 30, 1930 i umrai) STATES PATENT OFFICE LKAZIMER.MARCIITJltUSKAS, OF CHICAGO, ILLINOIS ADJUSTABLE SCAFFOLI) Application filed January 28, 1929. Serial No. 335,544.

This invention relates to an adjustable embraced Within the confines ofthe adjustscaffold adapted to be assembled and mountable scaffold. I v 7 ed in position against the side of a wall or it is furthermore an object of this invenbuilding to facilitate painting of the Wall or tion to provide an adjustable scaffold conmaking of repairs or the like, said scaffold slsting of adjustable uprights having cages embracing frames or cages adapted to be forming a part thereof adapted to seat placed against the surface of the all and against the outer surface of a Wall with said supported in position by means of adjustuprights being provided With blocks and able braces With said cages having uprights tackles to facilitate raising of a cross-beam 10 on the upper ends of which blocks and tackles lnto a predetermined elevated position to are mounted and c nnected to a cr -b support a suspended saddle or seat in a posito facilitate raising the cross-beaminto an tion to permit the saddle to be raised or lowelevated position to afford a suitable support cred or moved transversely of the Wall to perf a ll Carriage on hi h a ddl t nntpainting or repairs to be made to differ- 15 is suspended by means of ropes and pulleys ent portions of the Wall betweenthe adjustto permit the saddle to be raised or lowered e up lgnts and below the Cross-beam on so that access to different portions of the Wall WhlCl} the fiaddle 13 ppo I v or building on which the'scalfold is engaged It IS a P Q l 0f lllventloll may b dil h d to provide an ad ustable scaliold adapted 20 It i an bj t f thi i ti n t id to be removably placed against the-side of an adjustable scaffold adapted to be braced ng and hming a cl'ossheam which in position againstithe side of a building and y be used lowered to P p y "PG- havingan adjustable saddle Which maybe traveling carriage soflmt Mhustable raised or lowered or moved sidewardly in Saddle Supported by t 031111183 y be 25 i direction to permit a person i i i moved into dlfierent positions v tlnn the j the saddle to have access to all portions of confines of the 11191110613 p the Wall. of the building against Which the l l Q to Afford accesslo scaffold is placed. I different portions of the Wall against which I is also an Object of this invention to PM} the scaffold 1s placed so that the Wall may 30 vide an adjustable scaffold adapted to be rebe D d 'l may be i all movably placed in position against the outer P of [he 1 r v i i ,2. 1. Wall of a building wlth said scaffold having @9 1 l lmpolviumb j a c rose-beam adapted to be raised in position fills ll/911131011 fi ppf i from the to support a roller carriage on Which-anad- Closures 1n the slwcmwtmn n the 35 justable saddle is engaged to permit a perf m wi a p 1 son to be moved into different positions ad- 3 i e i lm 15' c 3 N a jacen-t the VJltll of the building to facilitate m m m (1 m m ml )aintino' or re nirin of different r'ts more fully desc'rlbed' lfi i s b r L On the drawings:

I 4 17 J. i 4 r i ni 'ure 1 lllllSlZl'dbG-S a fra 'mentar s1de 0 It IS a further ob ect of this invention to 3 l elevation of a Wall=of a building having enprovide an ad ustable scaffold comprising a gaged therefigainst an ilnpfoved. adjustable P f Cages 9 frames Whlch We ada scallold embodying the principles of this in be seated. agalnstja' Wall and supported in v gi I 45 Position ym n s s e extellSlble Figure 2 is an enlarged top plan view of braces Q F a -b m y l one of the side cages or frames taken on into a predetermined position and held in 11 II II f Fi ural,

SaidpQS PP a ladjutilble Sfld- "Figure 3 is a reduced side elevational View dle in a positionpermitting a person to have taken on line III-III of Figure 2.

5 ready access to different portions'of -the Wall Figuret is a vertical sectional view taken on line IVIV of Figure 2 illustrating a portion of a brace member in position and also showing a portion of the saddle supporting beam seated in place.

Figure is an enlarged side elevation of the saddle supporting carriage engaged on a fragmentary portion of the beam supporting the same.

Figure (3 is an enlarged transverse section taken on line Vl-Vl of Figure 5.

Figure 7 is a fragmentary side view of the middle portion of one of the adjustable brace members used to support one of the cages or frames of the sea field in position.

Figure 8 illustrates a fragmentary side view of a modified form of adjustable brace member for use in supporting the cages or frames of the scaii'old in place.

As shown on the drawings:

The reference numeral 1 indicates the wall of a building which is either to be painted or repaired and against which an improved adj ustable scailold embodying the principles of this invention is engaged. The adjustable scaffold comprises a pair of cages or frames each embracing a back 2 and two converging side walls 3 rigidly connected at their front ends to an upright t which is braced in position by means of transverse slotted frames or brackets 5 which extend rearwardly from the upright 4 and are secured at their rear ends to cross members forming part of the back 2 of the cage. Formed on theupper portion of the back 2 of the cage is a socket or pocket (3 for the reception of the upper end of a collapsible brace comprising a plurality of brace members or poles '7 and 8 which are connected together by means of a hinge 9 or other suitable means to permit the brace members to be collapsed when not in use. Engaged on the brace rods or members 7 is a loop connector or clamp member 10 which is adapted to be engaged over the end of the brace bar lying adjacent the brace bar 7 to hold the brace members rigidly clamped together in the extended position illustrated in Figures 1 and 7.

The upper end of the top brace member 7 is projected through the slot of the brace frames 5 forming part of a cage with the upper end of the brace member 7 projected into or seats in the socket 6 formed at the upper portion of the rear wall of the cage as illustrated in Figure 1. By this means the extended brace has the lower end thereof sea ed upon the ground and the upper end engaged in the cage to hold the cage ina predetermined elevated position to permit the back of the rear wall 2 to seat flatly against the surface of the "all of the building 1.

Rigidly clamped by means of brace rings 11 or the like on the upper end of the front upright 1 of each cage is an extension shaft or pole 12 provided with a notch 13 in the front side of the upper end thereof to afford a seat or pocket for one end of a transversely positioned carriage supporting beam or bar 1 1.

The end of the cross-beam 15 has pivotally supported thereon. by means of bolts 15 U-straps or hangers 16. Connected to the hangers 16 are ropes 1'? vhich are engaged through blocks 18 which are supported on the upper ends of the vertical extension bars 12 and form a block and tackle arrangement whereby the cross-beam 1 1 may be raised and lowered by means of the ropes 1T. lVhcn the cross-beam 14 is raised to its uppermost position by means of the ropes 17. said cross bar is adapted to seat in the notches or pockets 13 of the upright extension bars 12 as illustrated in Figure -11. The cross-brain ll has stop blocks or cleats 3i secured to the front side thereof to hold the cross-beam 11 against shifting longitudinally or transversely of the upri hts 12.

Secured on the front faces of the u 'irights 12 adjacent the notches .13 are brackets adapted to form pockets for the reception oi the cross-beam 11. The brackets 35 hold the cr ssbcam in place seated in the notches 13. The cross-beam 1 is adapted to be raised by means of the ropes 17 to a point above the brackets 35, after which the cross-bean'i moves toward the uprights 12 and is lowered to seat behind the brackets 35 as illustrated in lfiigure at.

Pivotally mounted on the sides of each upright 12 is a fulcrumed release guide or arm 36 to one end of which a release rope or trip cable 37 is attached. hen it is desired to lower the cross-beam, it is first raised out of the sockets 13 by means of the ropes 1.7 to clear the upper ends of the brackets 35. The release ropes 37 are now pulled to swing the guide arms 36 from the full line position of Figure 4t into the inclined dotted line position to close the sockets. The cross-beam 14 is now lowered and slides omiwardly over the inclined guide arms 36 and over the brackets 35, thereby permitting the crossbeam to clear the sockets and be lowered to the ground.

Movably supported upon the crossbeam 14 is a carriage 19 which straddles the crossbeam 1 1 and is provided with a pair of upper supporting rollers 20 which rotatably track upon the upper edge of the cross-beam 1 1. Rotatably supported in the lower corners of the carriage 19 are small and large pulley wheels 21 and 22 respectively (Fig. 6). Rotatably supported in an opening in each of the upright members 23 of the carriage 19 is a guide roller 24. The guide rollers 24 are so positioned that they track on the side surfaces of the crossbeam 11 thereby ali'ording an arrangement whereby the carriage 19 may be easily run back and forth on the cross-beam.

Engaged over the two large pulley wheels 22 of the carriage and passing through a block 25 is a rope or cable 26. One end of the rope or cable 26 is connected to one arm 27 of a saddle or chair 28, the other arm 29 of which is hung on a hook 30 carried by the block 25 as illustrated in Figure l. A person seated in the saddle or seat 28 is thus permitted to raise himself by pulling on the rope or cable 26 thereby causing the saddle to be raised or lowered as desired so that different portions of the wall 1 may be conveniently reached.

Figure 8 illustrates a modifiedform of extensible brace adapted for use in place of the brace illustrated in Figure 7 and comprising a plurality of overlapping bars or poles 31, the overlapped portions of which are rigidly connected together by means of clamps or loop members 32 whichare pivotally supported on one of said brace bars 31.

When the adjustable scaffold is tobe used, a pair of cages or frames 2tare adapted to be raised on the upper end of a pair of braces 78 with the lower ends of the braces seated against the ground so that the cages or frames may be elevated a desired distance with the flat backs 2 of the triangular cages resting against the outer surface of the wall 1. A horizontal brace beam or sill 33 projects through the lower portions of the cages or frames 24 and rests on the lower bracket 5 of the cages as illustrated in Figure l and are secured to said cages to hold the same properly spaced one from the other. By manipulating the ropes or cables 17, the cross-beam lt isadapted to be raised to seat in the brackets 35 so that the carriage 19 is raised to a desired height with the cross-beam 14. VVith the cross-bea1n raised to seat in the brackets 35 the saddle 28 is adapted to be raised off of the ground by proper manipulation of the cable or rope 26. The cross-beam 1% may now be raised above the level of the two supporting cages until said beam passes the brackets 35. The cross-beam 14 is new lowered to permit the cross-beam to pass the released guide arms 36 and seat in said notches or sockets 13 behind the brackets to properly support the cariage at the desired elevation. A person sitting in the sad dle 28 may thus elevate or lower himself and by using his feet on the wall may move the carriage transversely so that the carriage will roll on the cross-beam 14. In this manner a person seated in the saddle 28 may cover all portions of the building wall .1

within the confines of the adjustable scaf-' fold so that the wall may either be painted or repaired as the case may requir It will thus be noted that quite a large area of a wall may be conveniently covered with a single positioning of the adjustable scaffold. If desired, the extensible braces 78 which support thecages or frames in position, may

be of the type illustrated in Figures 7 and 8, or if preferred, may beof a telescoping type or any other suitable form to satis- 'factorily brace the cages in place against a wall.

Attention is directed to the fact that the improved adjustable scaffold may be conveniently adapted for use at elevations above the second, third or fourth floors of a building. By omitting the brace members, the cages 2% may be suppported on the window sills of the windows of a building with the rea. portions 2 facing inwardly and with the uprights 4 andextensions l2 projecting upwardly on the outside of the building. The cages may be braced in position seated upon the window sills by means of cross bars projcctino' transversely through the rear portions of the cages above the bracket members 5 to hold the cages properly seated in position. By this means a pair of cages may be mounted in two different windows with the uprights positioned in a convenient location to permit the cross-beam lt to be raised in position and seated in the pockets 13 thereby conveniently supporting the saddle 28 in a suspended position at any desired elevation above the ground.

It will, of course, be understood that many changes may be made and that numerous de- 1 tails of construction may be varied through a wide range Without departing from the principles of this invention and it is therefore not purposed limiting the patent granted hereon otherwise than necessitated by the scope of the appended claims.

I claim as my invention:

1. An adjustable scaffold comprising a pair of cages, adjustablebrace members for independently supporting the same in position against a wall, extension members on said cages, block and tackle mechanisms supported on said extension members, a cross-beam supported by said blockand tackle mechanisms, a carriage movably supported on said crossbeam, a saddle, and means adjustably supporting said saddle from said carriage.

2. An adjustable scaffold comprising a pair of frames, adjustable brace members projecting upwardly through the bottoms of said frames for-supporting the same agalnst a wall, a cross-beam, means for supporting said cross-beam on said frames, a carriage movably mounted on said cross-beam and a saddle adjustably supported on said carriage.

3. An adjustable scaffold comprising a pair of adjustable upright mechanisms adapted to be engaged against a wall, extensions secured on said mechanisms, a cross-beam, means for adjustably supporting said crossbeam on said extensions, a carriage movably supported on said cross-beam, and a saddle adjustably supported from said carriage.

I An adjustable scaffold comprising a pair of frames,'adjustable brace means for supporting the same against a building, a brace member connecting said frames to hold the name in spaced relation, extensions on said 'l'rames, brackets thereon, a cross-beam, means on said extensions for elevating said crossbeam into a predetermined position to seat in said brackets, and a saddle mechanism adjustably suspended from said cross-beam.

57 An adjustable scatl old comprising a pair oi? cages, extensible brace members engaged in said cages to hold the same snipported at an elevated position above the ground and against a wall of a building, extensions on said cages, block and tackle means supported on said extensions, a crossbcam supported on said block and tackle means, a roller carriage movably engaged on said cross-beam, rope and pulley mechanisms carried by said carriage and a saddle supported by said rope and pulley mechanisms.

6. An adjustable scali'old comprising a plurality of cases adapted to be e .gaged against a wall of a building. adjustable brace members for independently supporting each of the cages in position, a cross-beam. bracket members on said cages, means on said cages for raising the cross-bean'i to a predetermined position to permit the same to seat on said cages behind said bracket members, a roller carriage on said cross-beam, and a saddle mechanism adj ustably arried by said roller carriage.

7. An adjustable scafi'old comprising a pair of cages, adjustable brace means or supporting the same against a wall of a building, an adjustable cross-beam connecting said cages, a carriage movably mounter, on said cross-beam and a saddle adjustahly supported on said carriage.

S. An adjustable scali'old comprising a cross-beam, adjustable brace mechanisms adapted to be supported on the ground and have contact with a *all of a building, means on said brace mechanisms for supporting the cross-beam in a predetermined elevated position, fulcrnmed members on said brace mechanisms to facilitate lowering ot' toe cross-beam, a movable carriage on said crossbeam. a. saddle, and adjustable 11' ans connecting said saddle with said carriage to permit the saddle to be elevated and lowered to afford ready access to different portions of the wall against which the scatiold is engaged.

9. An adjustable scatiold comprising a pair of cages adapted to be seated against a wall, adjustable braces for supporting the cages in position, a brace member connecting said cages one to the other, notched extensions on said cages, brackets secured on said extensions, block and tackle means supported on said extensions, a. cross-beam supported by said block and tackle means adapted to be lowered into said brackets, a. carriage movably mounted on said cross-beam, a saddle, pulley wheels mounted on said carriage, a rope engaged on said pulley wheels and connected to said saddle to permit the saddle to be raised and lowered with respect to said cross-beam to ali'ord ready access to dil'lerentportions of the wall on which the scatfold is engaged, members on said extensions, and means for operating said members to facilitate lowering of the cross-beam.

10. An adjustable scatl'old comprising a pair of cages, uprights forming a pa rt thereof, adjustable brace members engaged in said cages to hold the same supported at a predetermined distance above the ground and seated against a wall of a building, a crossbeam, means on said uprights for raising the cross-beam to a predetermined position to permit the same to be supported on said uprights, brackets on said uprights to hold the cross-beam in its elevated position, a saddle adjustably supported from said cross-beam and adapted to be moved both vertically and horizontally with respect to the wall to a'l'- ford access to ditlerent portions ot the wall, trip members fulcrumed on said uprights. and means for actuating said trip members when the cross-beam is raised to position said trip members to guide the crossb am downwardly past said hooks when it is desired to lower said cross-beam.

11. An adjustable scali old con'i iirising a pair of cages, means for connecting the same, brace members for supporting the cages against a wall at a predetermined distance from the ground, a cross-beam, stop bloc-1s on said cross-beam, means on said cages for adjustably supporting the cross-beam at a 'n-edetcrmined elevation from the ground, t'ulcrumed means on said cages iermitting release and loweril'ig ot the cross-beam. a supporting member movablv mounted on said cross-beam, a saddle thereon tor carrying a person, and means for adjustably supporting said saddle from said mo *ahly supporting member to permit the saddle to be adjusted with respect to the "all on which the scatl old is mounted.

In testimony whereof I have hereunto subscribed my name at Chicago, Cook County, Illinois.

KAZHTER MARCINAUSKAS.

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