Venetian blind slat
US 2603286 A
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Description (OCR text may contain errors)
July 15, 1952 1 MlAo 2,603,286
VENETIAN BLIND SLAT Filed Sept. l, 1950 IN V EN TOR. 7,7/0 Amas' /V/a Patented July 15,711952 ifomTEoy-STT VENETIAN BLIND sLAT rThomas Miao, Shanghai, China l Application september 1, 195o, sesamo; 182,756 10mm. (c1. 16o-17s) 1 This finvention relates to slats for lVenetian blinds or jalousies and more particularly to slats to be movably mounted by a supporting structure for controlling the passage of'light and air through a blind including such slats.
It is among the objects of the invention to provide an improved blind or jalousie slat which will transmit-diffused light at all times, but will obstruct vision through 4a blind including such slats whenever the blind is closed and will obstruct vision through a jalousie or similar structure in which the slats are iixedly mounted. which will permit a free passage of air therebetween and, Awhen rnovably mounted in a blind, can bemoved relative to each other` to block .such
passage of air, which will obstruct the passage` ofl precipitation through a blind 'or jalousie in which they are included, and which are simple and l,
durable in construction, economical to manufacture, and easy to install.
Other objects and advantages will become apparent from a consideration of the following description and the appended claims in conjunction with the accompanying drawing wheren "Figure l is an elevational view of a Venetian blind including slats illustrative of the invention;
scale, of one of the slats of the invention;
Figure 3 is a cross sectional view on the line 3 3 of Figure 2;
Figure 4 is an end elevation of a fragmentary portion of a Venetian blind including slats constructed in accordance with the invention; and
Figure 5 is an end elevation of associated slats showing the slats in a dierent position relative to each other from that illustrated in Figure 4.
With continued reference to the drawing, the Venetian blind illustrated in Figure 1 may be of well known construction having at its top a box or compartment including mechanism for raising and lowering and adjusting the blind, this rnechanism being covered by a facia board II'I and being operated by depending cords I I and I2 disposed at respectively opposite sides of the blinds. Tape ladders I3 depend from the mechanism including compartment behind the facia board ID in spaced apart and substantially parallel relationship to each other and a bottom board I4 is secured to these ladders at the lower ends thereof. A plurality of slats I 5 are carried by the ladders I3 between the bottom board I4 and the facia board I in spaced apart and parallel relationship to each other.
Figure 2 is a top plan view, on an enlarged The root-tom 'board I4 together with thsiats I3 may be raised and-lowere'dby oneof the cords, for example, bythe cord? I I, and the ladders may be adjusted to varythe tilt or inclination of the slats I3 by the other cord I2.
As Venetian blind structures are generallylold and welly known to the art, a? more d'etaileddescription of the slat supporting and adjusting structure is considered unnecessary for the purposes of the` present disclosure.U While the slats are illustrated in the accompanying drawing as being movably mounted ina Venetian blind structure,.it'isto be understood'that they may be fixedly mounted in a suitable frame to provide jalousies or, shutters without 'in any Way exceeding the scope ofthe invention. q l
The slat offthe present :invention'iisfparticularlyv illustrated in Figures 2 and 3 and 'comprises an elongated, rectangular strip ofsheet material which is thin in proportion to its width and narrow in proportion to its length and has substantially parallel longitudinal edges. This slat is formed of a translucent material, such as a suitable synthetic resin plastic, so that light will be transmitted therethrough, but vision will be obstructed. The material of the slats may be colored or tinted, if desired, and the surfaces of the slats may be ornamented in any desired manner.
Each slat has a corrugation I6 of partly circular cross sectional shape extending longitudinally thereof substantially symmetrical with the mid-width location of the slat. The radius of curvature of the corrugation I E is slightly greater than one fourth the width of the slat and the corrugation is bordered on the convex side thereof by concavely curved marginal portions extending one along each side of the corrugation and having a radius of curvature substantially the same as the radius of curvature of the corrugation. The distance between a plane touching the concave surfaces of both marginal portions II and a plane parellel to the first mentioned plane and touching the convex surface of the corrugation IB is substantially equal to the distance between adjacent tapes I8 of a slat supporting ladder I3. and is clearly illustrated in Figure 4.
With this arrangement, when the slats are in open position with the blind closed, as illustrated in Figure 4, a tortuous or sinuous passage is provided between each two adjacent slats. When the slats are in their open position, ventilating air may ow freely in either direction g through the sinuous passages between adjacent slats, but vision through these spaces is obstructed or essential characteristics thereof".
by the intervening corrugation and marginal portions of the slats. At the same time, atmospheric precipitation, such as rain, striking the blind, will not pass through the spaces between the slats into a room protected by the blind, but will be deflected by the corrugated portions of the slats and drain of! of the outer edges of the slats, as illustrated in Figure 4.
When the slats are adjusted to closed condition, as illustrated in Figure 5 the outer marginal portions'of the slats "contact the corrugated por-A tions of adjacent slats providing a relatively tight closure between adjacent slats to obstruct the ilow of air through the blind. The slats being formed of translucent material, light will be transmitted through the slats fatall-times'f However, if it should be desiredtdobstructthe ow of light the slats may be formed of an opaque' and nonreiiective material and mounted inza,
.respects as Y .illustrative and' 'not r restrictive,- the 'scope' ot rtheinvention .being "indicated, by' the. appended claim' ratherzthan.bytheioregoing de`- Y scription, and all changes which comewithin the-meaningrand range of' equivalency of' the claimsfare, therefore, intended. to vbe embraced therein.
What is claimed is:
A blind comprising a support and a plurality of slats mounted in said support in spaced apart and substantially parallel relationship to each other, each of said slats comprising a strip of light transmitting sheet material having a longitudinally extending corrugation disposed symmetrically of the midwidth location thereof and having marginal portions of less width than the width of said corrugatiorif-1extending-one along each'sidev of the latter'. said corrugation having a radius of curvature transversely of said slat at least as great as one-fourth of the width oi the slat and said marginal portions each having a radius of curvature transversely of vsaid slat substantially" equal to the radius of curvature of said corrugation andhaving their convex side at the same'side of said slat as the concave side of said corrugation, said slats having their corrugations disposed at the upper sides thereof and being spaced apartl ar distance such thaty a plane touchingthe-convex` surfaces of both marginal portions of vone slat is substantially inl contact with the' convex .surface of the corrugation of the adjacent lower slat.
REFERENCES CITED The following references are of Arecord in vthe le of thisY patent:
UN'I'IEDv STATES PA'I'ENTS Number Name 1,093,415 HimesV Apr. 14, .1914 2,118,134 Allison Map24, 1938 2,209,355 Schmitz i- July.30. 1940 2,300,545v