SU14845A1 - Masonry device for flue and ventilation ducts - Google Patents

Description

The invention relates to devices having the appearance of a bottomless prismatic box held in the disengaged position by means of a movable core placed in Heiji.

In the proposed fixture, intended for the correct and quick laying of smoke and ventilation ducts, each wall of the box is divided along a gap extending to one end of the box and covered with a strip of sheet iron attached to only one side of the wall and the box. Between themselves, the individual parts of the box are connected only pivotally in the upper part by iron bars. The core is held by wooden planks nailed to the inside of the box.

In the drawing of Fig. 1, the figure shows the persp (an objective view of the device; Fig. 2 is a straight section of it.

The device consists of a bottomless prismatic four-piece box assembled from ordinary boards. Each separate part (FIG. 1) of this box, forming the walls of the box, consists of two planks connected tightly at a right angle. The walls of the box were divided by slot 5, extending and covered with a strip / sheet of iron, protected against one side of the wall, by R. R. influences.

a part of the wall of the box, with the same part adjacent to it, is jointly hinged by means of a bar, from the inner side they are nailed to the walls near both ends of them, bar C to hold the core //.

When the device is installed during the laying of the channel, the core is lowered down and the box returns to its normal position, i.e., the length of the outer, upper and lower sides of the box receive the same dimensions. As the masonry is erected, the bricks squeeze the walls of the box. At the end of the laying, the core is lifted upwards, the lower part of the box, thanks to the widened gap at the bottom, tapers under pressure from bricks, the box presses the prism shape and can be lifted up to the right, where the proper height of the core is brought back to the normal object.

A device for laying smoke and ventilation ducts in the form of a bottomless prismatic box held in a sliding position with the help of a movable core placed in it, characterized by the fact that each wall A of the box is divided along the slit S extending to one

the end of the box and a covered strip of g-sheet iron attached only to one half of the wall, and each half of the wall with the adjacent half of the other wall is connected tightly, and with the half of the same wall-hingedly with the help of the bar B, with the inner one; the sides of the walls A are nailed, near both ends of the strap C for holding the core N.