US2563549A - Grid rolling shutter - Google Patents

Description

Aug, 7, 1951 G, POGGI 2,563,549

GRID ROLLING SHUTTER Filed Oct. 27, 1948 j?? vena? Patented Aug. 7, 1951 2,563,549 GRID ROLLING sHUT'rER Giovanni Poggi, Bologna, Italy Application October 27, 1948, Serial No. 56,822 In Italy April 16, 1948 5 Claims.

This invention relates to grid `or lattice rolling shutters for shops, warehouses, windows, and so on, said shutter being constituted by frameor lattice-shaped members hinged directly with one another, said members being constituted substantially by two transversal profiled bars rigidly connected in a variety of ways by means of vertical bars or other distance pieces.

The object of this invention is to provide a grid roller shutter of the kind above referred t in which the lattice members, which are rectangular in shape, comprise a pair of horizontal bars and a number of upright bars fastened thereto, both the horizontal and the upright bars being made of profiled metal, and preferably of substantially U or C-shaped iron whereby the bars are so mounted as to hide, in the mounted shutter, the hollow parts of said bars, thus improving the solidity of the shutter and giving same an aesthetical appearance and at the same time the appearance of an extremely strong grid shutter.

Some practical embodiments of the invention Will be described hereinafter .by way of non-limiting example, with reference to the attached drawing, in which:

Figure 1 represents, in perspective view with parts in section a part of some hinged members of a lattice-rolling shutter.

Figure 2 shows in a view like Figure 1 a variation of embodiment shown in this figure.

Figure 3 represents a section of the new lattice rolling shutter partially rolled up on its drum, and

Figure 4 represents in perspective view part of a lattice-rolling shutter partially rolled on a drum -while Figure 5 shows a shutter of different design.

From the drawing it is apparent that the lattice rolling shutter is constituted by a number of rectangular frame members, comprising horizontal bars A and B and distance uprights C, said frame members being constructed and hinged together directly as will be better seen hereinafter.

As it results from Figure 1, bars A, B of sheet metal having preferably a C profile With substantially iiat intermediate portion, are provided with an inwardly extended fiap which is spirally curled as at a so as to form, together with curled edge b of the transversal bar B pertaining to the adjoining frame, a pair of jonting members of the kind of those employed for the manufacture of shutters made of hinged slats.

The horizontal bars A and B are connected as by welding (as shown in Figure 1) or by caulking to upright distance pieces C whose profile is preferably like that of two horizontal bars A and B jointed together by sliding rolls a into spiral rolls b.

As the two transversal bars A and B, when jointed together, leave a Visible horizontal joint groove, a groove e having a like appearance as said joint groove may be formed .by fluting distance uprights C.

Thus in Figure 2 the two transversal members A' and B are unlike, seen from their :front part. and, as the jointing groove of bars A and B does not come in correspondence of the middle line, for the sake of symmetry, the front part of bar A', which has greater width than the corresponding part B, is preferably provided with a luting d', which is symmetrically disposed with regards to the jointing groove between A and B and the upright distance pieces C are provided with two like iiutings e', e'.

It is apparent that the distance pieces C could assume any shape or be inclined as shown in Figure 5.

Thus for example said distance pieces could be not only straight, as shown, but also curved, so as to permit of widely varying the shutter design.

A lattice shutter formed as shown is rolled on drums T (Figures 3 and 4) as customary for rolling shutters made of rigid hinged slats.

From the foregoing it is apparent that the lattice shutter according to the invention can undergo numerous changes, especially as regards the outer appearance, though remaining Within the limits of the basic principle as set out or within lthe scope of the appended claims.

I claim:

1. A grid rolling shutter, comprising a pair of horizontal bars arranged one above the other and having'in part substantial U-shaped cross sections with the leg portions thereof turned towards each other, complementary legs of each of the horizontal bars facing upwardly and having extensions thereon, complementally curled inwardly for hinging of the bars by sliding of the curled portions together, and a plurality of spaced upright substantially U-shaped members rigidly connected to the base portion of said horizontal U-shaped bars, with the base portions of said U-shaped upright members also facing outwardly.

2. A grid rolling shutter according to claim 1, in which the curled leg extension of the lower bar is of larger radius than the curled leg extension of the upper bar.

3. A grid rolling shutter according to claim 2, in which the curled leg extension of the lower bar is longer than the curled leg extension of the upper bar.

4. A grid rolling shutter according to claim 1, in which the horizontal bars, when hinged together, have a horizontal slot therebetween where the curl of the leg extensions begins.

5. A grid rolling shutter according to claim 4, in which the horizontal bars with said horizontal slot therebetween form together what appears to be a fluted bar, said vfluted bar having a width 10 substantially of the order of the upright members, and said upright members being provided- 4 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 411,163 Miller Sept. 17, 1889 790,632 Hall May 23, 1905 1,352,656 Cahill Sept. 14, 1920 FOREIGN PATENTS iNumber Country Date 644,631 France June 12, 1928 589,199 Germany Dec. 4, 1933 425,012 Great Britain Mar. 5, 1935 840,369 Frane Jan. 16, 1939

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