US2369743A

US2369743A - Portable scaffold

Info

Publication number: US2369743A
Application number: US511845A
Authority: US
Inventors: Clarence E Langdon
Original assignee: Individual
Current assignee: Individual
Priority date: 1943-11-26
Filing date: 1943-11-26
Publication date: 1945-02-20
Anticipated expiration: 1962-02-20

Description

Feb. 20, 1945. c. E. LANGDON PORTABLE S CAFFOLD ,5 Sheets-Shet 1 Filed Nov. 26, 1945 I :hvum HOL angci'an Feb. 20, 1945. I c. E. LANGDON 2,369,743

' PORTABLE SCAFFOLD Filed Nov. 26, 1943 S'Sheecs-Sheet 2 Feb. 20, 1945. .QE, LANGDON PORTABLE SGAFFOLD Filed Nov. 26, 1943 I5 Sheets-Sheet 5 I amm diz %M Patented at. 20, 1945 N ED FA E-N151 Q IC PQRTABIE scarrow l Clarence E. Langdon, Janesvllle, Wis.

- This invention reiates toi a portable scaffold.

It is particularly aimedto provide such astruc- 1 ture wherein a platformis empioyed whicl r'readily maybeadjusted to va'rious heights and'aconstruction which is collapsible so as to occupy minimum space in transportation and in storage.

Further, it is an object to provide a novel means whereby the rails are connected together in a novel collapsible manner, and wherein a novel means is provided to secure the platform 7 to the rails at difierent heights or adjustments,

The more specific objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative v embodiment.

In said drawings:

I Figure 1 is a view of the structure in side ele l-| of Figure 1; and y n Figure 8 is a fragmentary perspective view of I one of the platform-fastening rods.

Referring specifically to the drawings, wherein like reference characters designate like or similar parts, I provide frontand rear supporting sections generally designated 10 and I! respectively. Such sections are approximately similar in that each consists of a, pair of upright posts or rails at [2, secured rigidly together in spaced relation as by means of suitable connectors or braces l3,fastened thereto as by means of feet I4 and. bolts l5, the latter being adapted for passage through different openings I 6, thus enabling adjustable positioning of such rods or braces [3. The lower ends of the' rails l2 of the front section III preferably are provided with rollers l1 fastened thereto in any suitable man ner, so as to facilitate the movement of the structure with minimum friction.

Slightly arched top bars are provided at I8. preferably in pairs, bolted'or otherwise pivoted as at I9 to the upper ends of the rails l2 of the front section II) and pivoted as by means of bolts to the upper ends of the rails l2 of the secc, 1.943, Seriat No.- 511,845 a a Claims. (01. 304-2) tion; 41. Such top: tars permitsections It and t l to be coi lapsedorfolded into relatively fiat contactingrelatiomas suggested in Figure 4.

Mounted adiustably between. the sections. and so as to be foldable therewith is a suitable plat form 2|. As shown such platform consists of a plurality of spaced slats 22, by way of example, which are connected together by fastening them at '23 to metallic straps 24, which are returned at one end and shaped into eyes or rings 25, while at the other end relatively long return portions 26 are provided to afford a, generally L-shaped elongated slot 21. Portion 26 is fastened to the remainder thereof by one of the elements 23. I

V Said platform 2| is adapted to be secured at various heights as desired by the work in hand,

by passing rods 28 through selected openings ZS'arranged in vertical series in the rails on the front and rear sections In and Il. Such rods 28 also pass through the eyelets or rings 25 and slots '21, removably, and one end of the rods 28 are formed of 0 or hook shape at 30, preferably with a deflected or angular free end 3|, so that the hook may engage opposite sides of adjacent rails l2 by gravity, thus to prevent displacement or detachmentof the rods accidentally from the sections l0 and I l, and accordingly prevent accidental detachment of the platform 2| Spacing and

positioning sleeves

28 and 28" may be arranged on the rods 28.

Due to the elongation of th return portion :26 and slot 21 it will be realized that incidentalto folding of the structure from the position of Figure 3 to that of Figure 4 the engaged rod 28 in the slot '21 mayslide freely therein to compensate for the folding.

In order to secure the sections H) and H in separated relation as in Figure 3, against accidental folding and collapse, a pair of

links

32 and 33, fastened pivotally together at 34, are pivoted respectively at 35 by bolts engageable with any of a series of opening 36 in top bars l8 and by bolts 33' eng'ageable in openings in rails of the section l0. While the

links

32 and 33 are adapted to align as shown in Figure 3, yet they readily will break apart and fold at the joints 34. However, sleeves 31 are slidable along the

links

32 and 33, particularly to a position enclosing portions of both links, friotionally or otherwise remaining in adjusted position, thereby preventing folding or disalignment of the

links

32 and 33 at the pivot 34.

On the section ID, at one or both of the rails 'II I may provide any suitable hook or supporting means 38 for a paint can or any other tool or accessory for use in the job at hand.

In addition, I may provide an auxiliary shelf at 39, hinging the same by means of one or more straps 40 on a rod 4|, mounted by brackets 42 suitably fastened to the rails l2 of the section Ill. Shelf 39 is useful in supporting paint cans, tools, or any other accessories or articles, and it is adapted to be folded into the plane of the section I0. It is maintained extended, however, by a pair of links 43 pivoted together at 44, and in turn pivoted one to the section at 4'5 and one to the straps 40 at 46. Such links will be maintained at the necessary angle shown in Fi ure 3 through the abutment of a lug'or stop 41 on one of them, with the edge ofthe companion.

Various changes may be resorted to provided that they fall within the spirit and scope of the invention.

I claim as my invention:

1. A structure of the class described havin front and rear supports foldable one against the other, a platform, a rod pivotally mounting the platform on one of the supports, said platform having an elongated slot, a rod passing through said slot and pivotally and slidably mounting the platform for folding movement on the other support, said platform having a one piece strap providing an eyelet at one end and the aforesaid elongated slot at the other end, said eyelet being entered by the first-mentioned rod.

2.. A structure of the class described comprising front and rear supports, linkage connecting the supports together for folding of one support relatively to the other into fiat condition, a platform, rods pivotally connectin the platform to the supports, said platform having an elongated slot entered by one of the rods whereby the platform is foldable with the supports, said linkage comprising bars pivotally connected to the upper ends of both of the supports and of a length permitting said flat folding of one support against the other, links pivoted together and pivoted to the bars and one of said sections, and means coacting'with the links to prevent relative pivotal movement of the links attached thereto and to one of the supports.

CLARENCE E. LANGDON.