US1730028A - Adjustable scaffolding - Google Patents

Description

Oct. 1, 1929. H. BALL f 1,730,028

ADJUSTABLE S CAFFOLDING Filed Aug. 8, i 1927 /f arrow 2 Patented Get. 1, 1929 BATE HOWARD BALL, OF LONG BEACH, CALIFORNIA ADJUSTABLE SGAFFOLDING,

Application filed August a, 1927. Serial No. 211,359. i

which can be folded into a compact bundle and which may be then readily transported fircm place to place.

()ther objects, advantages, and features of invention may appear from the acompanying drawing, the subjoined detailed description,

and the appended claim.

In the drawing tended position.

2 is a side View of the same. 3 is an'end view of the scafiold in collapsed position.

V 4 is a side view of the scaffold when fully extended.

Fig. is an enlarged fragmentary sectional view of the head plate showing the post engaging means.

Referring more particularly to the drawfy scaffold comprises a head plate 1' which may be made of either wood or metal, as desired. To the ends of the head plate 1 I hinge four legs 2, which legs are secured to the plate by means of hinges 3. Extension legs 4 are slidably mounted on the legs 2 and are held in adjusted position by wing-nuts and bolts 5 which travel in slots 6 formed in the legs 4. Guide straps 7 are secured to each of the extension legs 4 adjacent the top thereof and bear against the legs 2 to properly guide the legs 4 in their movement.

A strap 8 is secured to each of the legs 2 adjacent the lower end thereof and surrounds the leg 4 to assist in guiding the same. Crossbraces 9 are secured to adjacent pairs of legs 2, 2, thus providing side braces and preventing the outward movement of the legs when under a load. Hinged end braces 10 are pivno El 151'.

Fig. 1 is an end view of my scaffold in exoted to each pair of legs: and this brace holds the legs extended during actual use of the scafiold, and may-readily be folded to col lapse the legs as shown in Fig. 3.

To further assist in holding the scafiolding rigid when in'extended position I provide a pair of'brace- rods 11, 11, which rods are pivoted to the legs 2 by wing-nuts 12 and extend upwardly to bear against the bottom of the hinges 3, thus securely holding the scaffold. It may be further stated that the bracerods ll, 11 cross so that both ends of the scaffold are braced and the strainis more evenly distributed. The hinges 3 are set at a slight angle so that the legs 2, 4 are spread outwardly, thus making a more secure foundation and due to this taper of the hinges the brace-rods 11,- are wedged inposition, against the hinges.

A post 13 extends vertically through the head plate 1 and a U-shaped rest 14 is provided on the top of the post. The rest 14 is adapted to receive a plank or the like, which extends across the end of the room during the painting or plastering operation, and additional boards are then placed upon the plank to provide the complete scaffold. It is obvious thattherest 14 may be any suitable widthto accommodate boards of different thickness or Width. For painting operations ly hold in the post 13 and to hold thesame against movement. The latch 15 is lifted upwardly when it is desired to adjust the post and upon dropping the latch it engages the post and holds the same securely against downward movement. If the plate 1 is made of wood, reinforcing metal plates 16, 16 are Without adjusting the legs. For higher rooms the legs are extended and further adjustment is made through the post 13. It Will be evident that adjustments can be rapidly made since it is only necessary to release the latch 15, after which the post 13 can be raised or lowered the necessary amount.

Having described my invention, I claim: An adjustable scaffold comprising a head plate, rectangular in shape, adjustable legs secured to said plate at both ends thereof, a post slidably mounted in said head plate and positioned centrally thereof, a U-shaped rest secured to the top of said post and adapt- 15 ed to receive a timber, said head plate having a slot formed therein, a latch pivotally mounted in said slot, said latch being adapted to engage the side of the post to hold the same in adjusted position. In testimony whereof, I affix my signature.

HOWARD BALL.

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