US2131356A - Scaffold horse - Google Patents

Description

M. PRAEGER sCAFFoLD HORSE Sept.` 2 7, 1938.

Filed Dec. l5, 195'? 1N VENTOR. es@

77761 ville @ra BY Z Patented Sept. 27, 1938 UNITED STATES PATENT* Melville Praeger, New YorkN. n

- Application December 15, 1937, seria1'Na.-179,'s4s

4 Claims. (C1. 304-5) This invention relates to scaffolding and more particularly relates to improvements in horses for scaffolding. Y

Among the objects of the present invention are to provide a novel scaffold horse which is adjustable for different positions in use; which is cheap, and simple to construct and o-perate; and which is rugged and serviceable.

These and further objects of the invention will become evident in the following description of a preferred embodiment as taken in connection with the drawing thereof, in which:

Figure 1 is an end view of two of the horses in position with scaffolding on the upper section.

Figure 2 is a view of the lower supporting section.

Figure 3 is a side View of the novel scaffolding.

Figure 4 is a cross-sectional view taken along 4-4 of Figure 3, centrally through the horse; and

Figure 5 is a cross-sectional view taken along 5-5 of Figure 3.

In Figure 1, two horses, I0, III are placed side by side with scaffolding II adjusted transversely of the beams I2, I2 supported in the horses I0. The beams or boards I2 are inserted in respective brackets I3 secured to vertical angle irons I4 adjustably attached to the horses I0 in a manner to be hereinafter described in more detail.

The horses ID are essentially composed of angle' irons or bars riveted or otherwise combined into a structural unit. The transverse base bars I5 are maintained by truss rods I6 which span the ends of bars I5 and an intermediate portion of the vertical or standard angle iron I1. The bottom of vertical bar I1 is fastened centrally of the transverse base bar I5. v

Each horse I0 comprises two opposite base and standard bar combinations I5 to I1, as is evident from an inspection of the side View, Figure 3. A series of parallel cross-bars I8, I9y and 20 connect the end sections of the horse. Rivets are practical joining elements for the bars, although welding or other means are possible. I'he bars of the horse are preferably angle irons to impart ruggedness and strength to the unit. i

A vertical supporting rod I4 is adjustably mounted centrally of the cross-bars I8, I9 and 20 by bolts having wing-nuts 2l. A series: of holes 22 are formed along bar I4 for permitting variable positioning of the bar with respect to the bolts 2I. The bolts 2| are each passed through corresponding holes in the middle of cross-bars I8,

I9 and 20. The top of bar I4 contains the bracket A It is now evident how the height of beam I2 is controlled by adjusting the position of bar I4 in Y the cross-bars of the horse, I0. Figure 4 is a vertwo bars 24 of a single horse at the respective brackets 23. Brackets 23 comprise an open top formed by a bar 26 spacedly mounted from bar 24, as shown in Figures 2 and 5, by block 21.

The bars 24 contain a plurality of spaced holes,

which coact with `the bolts 28 having wing-nuts for manual control. Both bars 24 are adjusted to the same height, and together carry the crossbeam 25 for the horse. Strips 29, secured between the lower cross-bars I9`and 20, carry the bolts 28 and support the vertical bars 24.

The sets of cross-beams I2 and` 25 accordingly may be variably positioned in the scaifold horses of the invention, in a ready and simple manner. Modifications are possible in the construction of the horse which fall within the broader spirit and scope of the invention, as defined in the following claims.

I claim:

1. A scaffold horse comprising end supports, cross-bars carried between said supports, one above another, a bar having a plurality of holes, means on said cross-bars for coacting with the holes of said bar, whereby said bar is variably positionable on said horse in a vertical position, and a bracket secured at the top of said bar for carrying a cross-beam of the scaffold, further bars, arranged on opposite sides of said first mentioned bar for vertical movement and adjustably secured to said cross-bars for carrying a second cross-beam for the scaffold.

2. A scaffold horse comprising end supports, cross-bars carried between said supports, one above another, a bar having a plurality of holes, means on said cross-bars for coacting with the holes'of said bar, whereby saidbar is variably positionable on said' horse in a vertical position, and a bracket secured at the top of said bar for `carrying across-beam of the scaifold, further bars, arranged on opposite sides of said first mentioned bar, secured to said cross-bars for carryand a bracket secured at the top of said bar for.

carrying a cross-beaml of the scaffold, further bars, arranged on opposite sides of said iirst mentioned bar, secured to said cross-bars for carrying a second cross-beam for the scaiold, said further bars having a plurality of holes, a strip for each further bar, secured between said cross-bars, bolts having wing-nuts carried by said strips for variably supporting said further bars on the horse.

4. A scaffold horse comprising end supports, cross-bars carried between said supports, one above another, a bar having a plurality of holes, means on said cross-bars for coacting with the holes of said bar, whereby said bar is variably positionable on said horse in a vertical position, and a bracket secured at the top of said bar fo-r carrying a cross-beam of the scaffold, further bars, arranged on opposite sides of the first mentioned bar, secured to said .cross-bars for carrying a second cross-beam for the scaiold, said further bars having a pluralityof holes, a strip for each further bar, secured between said cross-bars, bolts having wing-nuts carried by said strips for variably supporting said further bars on the horse, abracket carried at the top end of each further bar for supporting said second cross-beam.

. f MELVILLE PRAEGER.

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