US1918116A

US1918116A - Scaffolding

Info

Publication number: US1918116A
Application number: US543173A
Authority: US
Inventors: James T Mansfield
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-06-09
Filing date: 1931-06-09
Publication date: 1933-07-11
Anticipated expiration: 1950-07-11

Description

y 1933- a J. T. MANSFIELD 1,918,116

SCAFFOLDING Fil ed June 9'; 1931 2 Sheets-Sheet l fama vl' angfa'ezd INVENTOR ATTORNEYS different desired elevations,

Patented July 11, 1933 UNITED STATES JAMES 'I. MANSFIELD, OF 1PIT'1SfBURG'I-I, PENNSYLVANIA SCAFFOLDING- Application filed June 9,

The object of this, my present invention, is the provision of a scafiold-construction that shall comprise a simple but strong and sturdy structure which may be quickly set up to widths and lengths and which may have its parts readily disassociated and taken down and folded into a compact bundle when not required for use.

A further object is the provision of a scafio fold construction constructed of parts to afford stagings, one of which being arranged over the other but cooperating with each other in such manner that all of the stagings are efiectively locked together The invention will be fully and comprehensively understood from a consideration of the following detailed description when read in connection with the accompanying drawings which form part of the application, with the understanding, however, that the 'improvement is capable of extended application and is not confined to the exact showing of the drawings nor to'the precise construction described and, therefore,.such changes and modifications may be made therefrom as do not affect the spirit of the invention nor exceed the scope thereof as expressed in the appended claims.

In the drawings:

Figure 1 is a top plan View of the improvement partly in section.

Figure 2 is a sectional View approximately on theline 22 of Figure 1.

Figure 3 is adetail plan View looking toward the headed end of one of the uprights with the horizontal brace members attached thereto and held thereon by the clamping or locking nut.

Figure 4 is a perspective view looking to- A0 ward the end of one of the horizontal brace members.

The scaffold may be arranged at any desired height or sections may be added thereto to elevate the scaffold as the work progresses or in order that the workmen on the scaffold can reach ceilings or walls of determined elevations. Thus the scaffold embodies any desired number of superimposed sections or stagings, each of which, however,

. includes tubular posts 1 that have the bores 1931. Serial No. 543,173.

at their upper ends flared, as at 2, and formed at their said endswith heads 3. The heads are in the nature of blocks that have their corners cut-away or concaved so as to provide' right angular extensions 4. These substantially rectangular extensions are formed with substantially key-hole slots or openings, the restricted passages of which are indicated by the numeral 5 and the inner and semi-circular passages are indicated by the numeral co 6. The inner wall provided by each of the passages 6 is tapered from the top to the bottom thereof, and thus this portion .of each passage is what may be termed Wedgeshaped. The wedge-shaped passages .are de as signed to have receivedtherein tapered or wedge-shaped substantially semi-cylindrical tongues 7 formed on neck portions 8 that pro ject centrally from 'the'outer and straight walls of rectangular heads in the nature of blocks 9 formed on the ends of the tubular, bracemembers 10. v p p I The lower post 1 has its lower end received in. a sleeve or annular flange that projects from a base plate 11 and when the scaffold is to be bodily moved the base plates 11 have fixed on the under faces thereof head plates 12 for the pivoted mounts 12 for caster wheels 13. h

Only three stagings of the scaffolding are disclosed by Figure 2 of thedrawings but obviously any desired number of such stagings or sections may be employed. The posts 11? of the intermediate section or staging have their lower ends tapered, as at 12, to be received in the flared or tapered bores of the lower posts 1. The posts 11' are exteriorly threaded for a distance from theirtapered ends and have screwed thereon plates 13, which when the scaffolding stagings ,or. sections are associated are designed to be I screwed over the heads 3 to cover the interengaging wedgeshaped tongues and grooves in the said heads and on the ends of thehori- Zontal brace members 10 and in the heads 3. v.9

As far as-the description hasprogressed it will be noted that the scaffolding may be easily and quickly erected at different determined elevations and likewise the scaffolding may be built up of any desired length or width. It '10 v Will be also apparent that when the scaflolding is erected it will provide a strong and rigid construction and that the scaifolding boards are supported upon the brace members 10 and the whole structure upon the wheels 13 if desired.

The top or uppermost posts for the scaffolding, indicated by the numeral 14, are threaded, as at 15, for the major portion of their lengths and these threaded portions are engaged by threaded plates 16 in the nature of nuts. The posts 14 enter the bores of the posts therebelow and may have a slight frictional engagement with such posts. The posts 14 have outer and non-threaded ends fixedly secured in heads 18 which are crossshaped in plan and which have the ends of their angle portions provided with key-hole slots or openings similar to those previously described and which are designed to receive therein tongues formed on the necks that extend .from the substantially rectangular blocks formed on the ends of tubular brace members 17.

It is thought that the foregoing description when read in connection with the drawings will fully and clearly set forth the construction and advantages of my improvement to those skilled in the art to which such invention relates so that further detailed description will not be required. The improvement may be employed in any place where a scaffolding is required and consequently may be used by either interior or exterior'decorators, by masons, carpenters or other artisans and that regardless of the height to which the scafl'olding is erected the same will present a strong, rigid, and safe structure. It will also be apparent that the parts constituting the scaffold may be readily disassociated and arranged one against the other to provide a small bundle for storage or for shipment.

Having described the invention, I claim:

1. A scaffold construction comprising posts having upper headed ends provided with angularly disposed key-hole slots the inner passages of which are wedge-shaped, horizontal and transverse brace members having wedge tongues on their ends to be received in the wedge slots of the heads, and plates screwed on the posts and disposed directly over-the heads contacting with and for holding the wedge tongues in the wedge slots.

2. A scaffold made up of stagings or sections, each including tubular posts having tapered openings at their upper ends, said ends provided with heads having right-angu larly disposed key-hole slots the inner and wider passages of which are wedge-shaped, horizontal tubular brace members having headed ends provided with wedge tongues and necks connecting thetongues with the heads to be received in the wedge slots of the heads of the posts, the heads having tapered bores into which the upper ends of the posts are fitted and the lower ends of the intermediate posts being tapered to be received in the tapered openings of the posts, nuts screwed 'on said intermediate posts and an ranged over the heads of the posts, the posts of the upper section or staging being threaded and nuts screwed on said last-named posts and resting on the heads of the posts in which thethreaded posts are received.

In testimony whereof I afiix my signature.

JAMES 'r; MANSFIELD.