US2583437A - Adjustable scaffold - Google Patents

Description

Jan. 22, 1952 5. R. NEWLON, JR

ADJUSTABLE SCAF'FOLD Filed Feb. 7, 1947 2 Sl-IEETS-SHEET l I11 z'entar George R. New/on, J1:

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ADJUSTABLE SCAF'FOLD Filed Feb. 7, 1947 2 SHEETS SHEET 2 Fig. -l0.

George R. New/on Jr:

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In ventor' Patented Jan. 22, 1952 UNITED STATES PATENT orrics ADJUSTABLE SCAFFOLD George R. Newlon, Jia, Point Pleasant, W. Va.

Application February 7, 1947, Serial No. 727,099

Claims. 1

This invention relates to new and useful improvements in scaffolds and more particularly to an adjustable scaffold.

The primary feature of the present invention is to provide a scaffold whereby the legs of said scaffold are adjustable independently of each other so that the platform of said scaffold can be adjusted to a horizontal position at all times whether the legs be supported on a smooth or rough surface.

Another important feature of the present invention is to provide a scaffold of the character referred to including means carried by the cross bars supporting said platform for clamping the platform tightly in position to the cross bars.

A further feature of the present invention is to provide a scaffold that is quickly disassem bled for shipment or transporting and readily set up in position for use by painters, carpenters, brick-layers and the like.

A still further feature of the present invention is to provide a scaffold of the class described that is simple and practical in construction, strong and reliable in use, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a fragmentary end elevational view of the improved scaffold with wooden legs shown in part adjustably attached thereto;

Figure 2 is a top plan view thereof the platform being shown in part;

Figure 3 is an enlarged fragmentary view in elevation of the leg adjusting means;

Figure 4 is an elevational view of one of the adjustable clamping plates removed from the scaffold;

Figure 5 is a view in elevation of one of the leg receiving brackets to which is secured the clamping plate;

Figure 6 is an enlarged fragmentary view showing the clamping means carried by the upper cross bar which bears against a platform;

Figure 7 is a fragmentary view of one end of the scaffold, the leg adjusting means being shown in modified form to receive metal legs supporting the scaffold;

Figure 8 is an end view taken in the direction of the line 8-8 thereof;

Figure 9 is an enlarged top plan view taken on the line 9-9 of Figure 7, and

Figure 10 is an enlarged top plan view showing a still further modification in the leg adjusting means. I 7

Referring now to the drawings in detail, wherein for the purpose of illustration I have disclosed a preferred embodiment of the present invention, the numeral 5 represents an upper horizontal cross bar which is spaced parallel to but directly over the space between a pair of lower horizontal cross bars 8.

The ends of the upper cross bar 5 are secured as at 1 to the upper ends or a pair of substantially channel shaped leg holding brackets 8, and the ends of the lower cross bars 6 extend slightly past the ends of the upper cross bar and are secured as at 9 to the lower opposite sides of said brackets whereby the brackets are inclined inwardly at their upper ends.

Secured as at H) to the opposite sides of the brackets 8 are internally threaded bosses H which directly oppose threaded openings i2 in cars I3 extending outwardly from the side edges of a clamping plate I4, and bolts and nuts 15 carried by said bosses and openings in the ears afford means whereby the clamping plates are adjustable inwardly against preferably wooden legs 16 which are adjustable in said brackets 8.

Suitably secured to the upper periphery of the upper cross bar 5 are bosses l1 and threaded vertical bores I 8 extend through said bosses and the upper cross bar and are adapted to receive vertically positioned bolts l9 having clamping plates 20 secured to their lower ends by screws or the like 2|, said clamping plates having shoulders 22 at their upper ends which are adapted to fit into recesses 23 on the lower side of upper cross bar 5. I

The clamping plates are adjustable by bolts 19 to bear downwardly against boards 24 placed horizontally between the upper cross bar 5 and the lower cross bars 6, said boards 24 adapted to form a platform on which the worker stands.

The boards are in this manner clamped tightly between the upper cross bar and lower cross bars to prevent movement of the boards thereby assuring safe movement of the worker on the platform.

Figures 7 through 9 inclusively illustrate the invention in slightly modified form wherein the ends of an upper horizontal cross bar 25 are suitably secured to the upper ends of a pair of bracket holding plates 26 which are preferably triangular and having rounded corners.

Suitably secured to the lower corners of said plates 26 and spaced from the upper cross bar are the ends of a pair of spaced lower horizontal cross bars 21, and said ends of the lower cross bars extend past the ends of the upper cross bar whereby the plate 26 is inclined slightly inwardly.

Welded or otherwise suitably secured as at 28 to the outer side of plates 26 are a pair of sub-. stantially circular sleeve brackets 29 which are adapted to adjustably'receive preferably metal legs 30.

Bosses 3! project outwardly from the outer periphery of said brackets 29 and threaded bores 32 through said bosses adjustably receive set screws 33 which bear inwardly against the legs for adjustment of said legs.

Upper cross bar 25 carries in a manner as pre viously described bolts 34 having clamping plates 35 at their lower ends for bearing against the boards 36 forming the platform which extends horizontally between the upper cross bar and the lower cross bars. 7 1

Figure 10 illustrates the leg holding brackets designated generally by the numeral 37 in still further modified form. Said bracket thus shown is secured to bracket holding plates 38 as previously described and is preferably a split sleeve 39 having its out-turned ends if! adjustably connected by a bolt 4! to adjustably cla the bracket to a preferably circular metal leg In view of the foregoing description taken conjunction with the accompanying drawings it is believed that a clear understanding of thedevice will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary. I

It is to be understood, however, that even though there is herein shown and described preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appendedclaims.

What I claim is:

1. A device of the class described including a pair of opposing brackets for securement to opposing legs, a horizontally positioned upper cross bar secured to and between said brackets, a pair or horizontally positioned lower cross bars po-- sitioned below and parallel to the upper bar and secured to and between said brackets, said lower bars being offset on opposite sides of the vertical plane passing through the upper bar, a platform extending between the upper bar an'd lower bars,

clamping means carried by the upper bar and bearing downwardly on the platform forholding the platform against the lower bars, and clamping means carried by said brackets for adjustably' securing legs thereto.

2. A device of the class described including a horizontally positioned uppercross bar, a pair of horizontally positioned low-er cross bars positioned below and parallel to the. upper bar, said lower ;-horizontally positioned upper cross bar, a pair and a clamping plate adjustably carried by the brackets to bear inwardly against legs adjustably held in said brackets.

3. A device of the class described including a horizontally positioned upper cross bar, a pair of horizontally positioned lower cross bars positioned below and parallel to the upper bar, said lower bars being offset on opposite sides of the vertical plane passing through the upper bar, a platform comprised of parallel planks extending between the upper bar and lower bars, vertically adjustable clamping members carried by the upper bar and bearing downwardly on the platform for individually securing the planks against the lower bars, substantially channel shaped leg holding brackets secured to the adjacent ends of the bars, internally threaded bosses at each side of said bracket, and a clamping plate connected to said bosses by bolts and adapted to bear inwardly against legs held in said brackets for adjusting the legs. 7

4. A device of the class described including a horizontally positioned upper cross bar, a pair of horizontally positioned lower cross bars positioned below and parallel to the upper bar, said lower bars being offset on opposite sides of thevertical plane passing through the upper bar, a

platform extending between the upper bar and lower bars, vertically adjustable clamping 1nembers carried by the upper bar and bearing downwardly on the platform for securing the platform against the lower bars, bracket holding plateseach secured to the adjacent-ends of the bars,

',' sleeve brackets carried by said plates, and set screws carried by said brackets adapted to bear inwardly against legs held in said brackets for adjustment of said legs.

5. A device of the class described including a of horizontally positioned lower cross bars positioned below and parallel to the upper bar, said lower bars being offset on opposite sides of the vertical plane passing through the upper bar, a.

5*; platform extending between the upper bar and lower bars, vertically adjustable clamping mem bers carried by the upper bar and bearing downwardly on the platform for securing the platform against the lower bars, sleeve holding plates each f secured to the adjacent ends of said bars, split sleeves carried by said'plates, and bolts carried by the out-turned ends of said sleeves to adjustably clamp the sleeves to legs carried thereby.

GEORGE R. NEWLON, JR.

REFERENCES or'rnp file of this patent:

UNITED STATES PA ENTS The following references are'of r'ecord in the- Date

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