US902949A - Scaffold. - Google Patents

Description

J. M. DIBLEB. gourou). APILIUATIOH FILED APB. 20. 1908.

Patented Nov. 3, 1908.

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J. M. DIBLBR.

SCAFPOLD.

APPLICATION FILED APR. 2o, 190B.

Patented Nov. 3, 1908.

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JOSEPH M. DIBLER, OF GREENSBURG, PENNSYLVANIA.

SGAFFOLD.

To all whom it may concern:

Be it known that I, JOSEPH M. DIBLER, a citizen of the United States of America, residing at Greensburg, in the county of Westmoreland and State of Pennsylvania, have invented certain new and useful Improvements in Scaffolds, of which the following is a specification, reference being had therein to the accompaying drawing.

This invention relates to scaffolds, and its primary object is to provide a scaffold having an adjustable platform that can be moved by workmen upon the scaffold.

Another object of this invention is to provide a scaffold particularly adapted for carpenters and painters, the scaffold being'erected upon the ground adjacent to abuilding and connected thereto, whereby a substantial and safe structure will be provided for a number of workmen. To this end,I have devised a scaffold consisting of sectional uprights suitably braced and adapted to be connected to a buildin The sections of the uprights are provide with movable supports for a platform, said supports being held in a fixed position upon the uprights by frictional gripping blocks, which are easily moved when the latform is to be raised or lowered. The sca old is constructed whereby it can be knocked down and acked into a comparatively small space wlien not being used.

The detail construction entering into my invention will be hereinafter more fully described and then specifically pointed out in the appended claims.

In the drawings z-Figurel is a erspective view of a portion of my scaffold, lEig. 2 is an elevation of one of the uprights, partly broken away, illustratinga sup ort and the frictional gripping blocks thereo Fig. 3 is a vertical sectlonal view of the same, Fig. 4 is a front elevation of a portion of the scaffold illustrating one of the uprights, platform supports, and means for ralsing the support, Fig. 5 is a side elevation of an adjustable sheave used in connection with the scaffold, Fig. 6 is a detail view of an elevating lever used in connection with the scaffold, Fig. 7 is a horizontal sectional view of one of the braces of the scaffold, and Fig. 8 is a fragmentary view of one of the sectional uprights.

To put my invention into practice, I provide uprights having lower sections 1 and upper sections 2, the upper ends of the lower sections bein provide with casings 3 to receive the re uced ends 4 of the upper sec- Speccation of Letters Patent.

Application filed April 20, 1908.

Patented Nov. 3, 1908.

Serial No. 428,072.

tions 2. The reduced end 4 is tapered, as at 5, to iit in a V-sha ed notch 6 provided therefor in the end of t e lower section l.. When the scaHold is to be used upon a high building the apparatus can comprise a plurality of sections ointed together, as above described. The uprights are provided with right angular braces 7 having straps 8 for embracing the uprights. The braces 7 are cut away as at 9 to accommodate a longitudinal adjustable brace 10. The braces 7 are provided with angle plates 11 adapted to be temporarily secured to a building by suitable fastening means. The longitudinal brace 10 is provided with angularly disposed braces 12 having angle plates 13 adapted to be secured to a building by a suitable fastening means.

Slidably mounted upon the uprights are sup orts 14 having spacer blocks 15 )rovided at t eir outer ends with straps 16 adapted to be secured to a building by suitable fastening means. The spacer blocks protrude above the supports 14 to provide bearings 17 for a ladder or platform 18.

Pivotally mounted in the lower end of each support 14 is a link 19 and pivotally connected to said link, as at 20, 1s a stirrup 21 foi` embracing the upright. Pivotally mounted in the stirru 21 by pins 22 are frictional gripping bloc rs 23 for engaging the edges of the upright and holding the support in a fixed position.

Each support is provided with a lever 24, fulcrumed as at 25 and connected to the stirrup 21 by a rod 26. The lever 24 is I rovided with an adjustable weight 27 an with a cable 28, said cable having a finger grip 29 normally supported by an eyelet 3() carried by the support 14. The object of the weight 27 is to normally maintain the frictional gripping blocks 23 in engagement with the upright, and to release said grippingr blocks,

the finger grip 29 is pulled u wardly to raise the lever 24 and release the locks 23.

The u per sections 2 of the uprights are provide with movable gripping loops 31 and pivotally connected to said gripping loops are brackets 32, each bracket having a tooth 33 for engaging the upper section 2 and bindin the gripping loop on the upper section wlgien pressure is brought to bear upon the bracket. Each bracket is rovided with a sleeve 34 and passing throug said sheaves are cables or ropes 35, said cables or ropes being attached to the supports 14, as at 36.

The supports 14 can be raised by manually pulling u )on the cables or ropes 35 or can he raised )y using levers. The su ports 14 are pro ,ided with bearings 37 for s eeves 38 having pierced lugs 39. Iivotally conneeted to these lugs are levers 4() provided with cable or rope binding straps 4].. rl`he free ends of the cables or ropes 35 are adapted to pass through the straps 4] and support weights 42. When the levers 40 are pressed downwardly, the cables or ropes 35 bind in the straps 41 and elevate the su )ports 14 and the platform 18. Then the levers are released, the weights l2 draw the cables or ropes 35 through the straps 41 and allow the lei ers Lfl') to take a pressure grip upon the cables or ropes.

The number of braces used in connection with the scaffold depends on the height of the saine, and after the scaffold has been firmly secured to a building, the braces are gradually removed or lowered as the woik progresses from the top of the building. This is particularly true when the scaffold is used by painters, but'when used by brick layers and such artisans, where the work progresses fi'oin the bottom of the building, the braces and sections will be added.

It is thought that the manner of manipulating my scaffold to adjust the )latforin thereof will be fully understood rom the foregoing description, and I reserve the right to make such structural changes as are permissible by the appended claims.

Having now described my invention what I claim as new, is

l. A scaffold embodying sectional uprights, adjustable braces carried thereby and adapted to be connected to a building, supports slidably mounted upon said uprights and adapted to be temporarily secured to a building, a platform carried by said supports, links pivotally connected to the lower ends of said sup orts, stir-rups carried by said links for em raelng said uprights, frietional gripping blocks pivotally mounted in said i stiirups for gripping said uprights, weighted levers carried by said supports for normally holding said blocks in engagement with said uprights, gripping loops inovably mounted upon said uprights, sheaves carried by said i gripping loops, cables secured to said supports, and passing over said sheaves, levers pivotally mounted upon said supports, bindi ing straps carried thereby and adapted to receive the free ends of said cables, substanf tially as described.

2. A scaffold embodying sectional uprights, braces carried thereby and adapted to be secured to 4a building, supports s idably mounted upon said upriglits and adapted to be temporarily connected to a building, a platform carried by said supports, frictional gripping blocks arranged beneath said supports for engaging said uprights, sheaves movably connected to said uprights, cables connecting with said supports and assing over said sheaves, and means carried )y said supports for maintaining said gripping blocks in engagement with said uprights.

3. A scaffold embodying uprights, braces carried thereby, supports slidab f mounted upon said uprights, gripping blocks arranged beneath said supports for engaging said up rights, sheaves niovably attachedlto said uprights, cables connecting with said uprights and passing over said sheaves, and' means carried by said supports for maintaining said blocks in engagement with said uprights.

In testimony whereof I affix my signature in the presence of two witnesses.

JOSEPH M. DIBLER.

Witnesses:

E. N. DIBLER, HARRY E. BLANK.

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