US2006574A - Scaffold - Google Patents

Description

July 2, 1935. A, KASK SCAFFOLD Filed Feb. 7. 1934 lNvENToR ELEXAHDER KASK l'7 z?? A RNEY.

Patented July 2, 1935 UNITED STATES PATENT OFFICE 'Application February 7,

2 Claims.

This invention relates to improvements in scaifolding and has particular reference to a scaifold for use by painters, decorators, plasterers and the like.

The principal object of the invention is to produce a portable scaifolding which is simple to manipulate.

A still further object is to produce a scaffolding which may be used as a single unit or in combination with other units.

An additional object is to produce a scaifold which is portable and extensible.

In the accompanying drawing' forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a side elevation of my scaffold as the same would appear in use,

Fig. 2 is an end elevation of a pair of my devices as the same would appear' when joined one to the other,

Fig. 3 is a side elevation of one of the units of Fig. 1 in closed position, and

Fig. 4 is an enlarged detail cross sectional view on the line 4-4 of Fig. 2.

Decorators, plasterers and the like usually employ saw-horses of various heights, upon which planks are placed, and the user then stands upon the planks to reach high elevations. These sawhorses are usually of standard height and the result is that in rooms of various heights it is often difficult to reach the highest points or the scaffold may be too close to the ceiling to work comfortably. Applicant has, therefore, devised a scaffold which is adjustable.

In the accompanying drawing, the numerals 5 and 6 refer to upper sliding leg Sections loosely secured together by a bolt 1. This bolt also serves to pivot a strut 8 to which is pivotally secured braces 9 and l I. These braces have bayonet slots at their lower ends, which engage pins |3 and Ill, respectively, carried upon the legs 5 and 6. Slidably mounted upon the legs 5 and 6 are lower leg Sections |6 and l'l. At 18 I have shown a pivoted link which extends between the bottom of the legs 5 and 6 and at 2B I have shown clips which encircle the legs |6 and I'l. The numeral |9 refers to a cord which passes over rollers 2| and 22 and has its lower ends connected as at 23 and 24 to the lower ends of the legs 5 and 6. Secured to the upper end of the legs |6 and I'i, are sliders 26 which surround the legs 5 and 6 and have slots 21 formed therein through which pins 28 may be passed into holes 29 formed in the legs 5 and 6.

The result of this construction is that when the parts are in the position as shown in Fig. 1,

1934, Serial No. 710,188

the operator first swings the strut 8 vfrom its position parallel with the legs to a position at right angles thereto as shown in Fig. 2. This causes the braces 9 and to move so that their bayonet slots will engage the pins |3 and Ill thus holding the strut in horizontal position. By now spreading the legs, the brace i8 will move from the position of Fig. 3 to that of Fig. l and will hold the legs in proper spread position. The end of the strut 8 may now be placed against the wall and another unit set up after which a plank may be placed upon the strut. When two or more units are used together, as illustrated in Fig. 2, the two struts of the units are bolted together as shown at 3|, after which planks are laid upon these struts. When it is desired to elevate the unit, the operator grasps the rope 19 pulling downwardly in the direction of the lower arrow of Fig. 1, which elevates the legs 5 and 6, after which pins 28 are inserted, thus holding the legs 5 and L 6 in elevated position.

It will thus be seen that I have produced a device which will accomplish the above set forth objects.

Having thus described my invention, I claimz- 1. In a device of the class described, a' pair of inner legs joined at their upper extremities and having clips arranged at their lower extremities, a strut pivoted between said legs, braces secured to said strut and engaging both said legs, slidable legs mounted on the outside of said inner legs and having clips mounted at their upper ends and embracing the inner legs, links connecting the lower clips together, perforations in said inner legs and pins extendable through said upper clips and through said perforations to hold said inner and outer legs in fixed relation, and means for elevating said inner legs relative to said outer legs.

2. In a device of the class described, a pair of inner legs joined at their upper extremities and having clips arranged at their lower extremities, a strut pivoted between said legs, braces secured to said strut and engaging both said legs, slidable legs mounted on the outside of said inner legs and having clips mounted at their upper ends and embracing the inner legs, pulleys carried by said clips, links connecting the lower clips together, perforations in the edges of said inner legs, and pins extendable through said upper clips and through said perforations to hold said inner and outer legs in fixed relation, and means for elevating said inner legs relative to said. outer legs, said means embodying a looped cord having its free ends attached to said lower clips and its intermediate section reaved over said pulleys.

ALEXANDER, KASK.

Images