US2751000A

US2751000A - Venetian blind

Info

Publication number: US2751000A
Application number: US385423A
Authority: US
Inventors: Norman C Mahan
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-10-12
Filing date: 1953-10-12
Publication date: 1956-06-19
Anticipated expiration: 1973-06-19

Description

June 19, 1956 N, c, MAHAN 2,751,000

. VENETIAN BLIND Filed Oct. 12, 1955 2 Sheets-Sheet l iii A 2 Fig.

INVEN 0R. Norma/v C. 020 an 7 N. C. MAHAN VENETIAN BLIND June 19, 1956 2 Sheets-Sheet 2 Filed Oct. 12, 1953 Norman C. Malian INVENTOR.

1 BY anal flaw fiM United States Patent VENETIAN BLIND Norman C. Malian, Ashland, Ky., assignor of twentyfour and one-half per cent to James A. Anderson and twenty-four and one-half per cent to David P. Anderson, Ashiand, Ky.

Application October 12, 1953, Serial No. 385,423

3 Claims. (Cl. 160-115) This invention relates to a Venetian blind and more particularly to a Venetian blind wherein a group of slats may be tilted independently of the position of tilt of the remaining slats of the blind.

An object of this invention is to provide a Venetian blind having means whereby all the slats below a predetermined position may be tilted in a given direction independently of the angle of inclination of the slats above the predetermined position.

Another object of this invention is to provide a Venetian blind having a plurality of slats supported in vertically spaced apart relation on a pair of ladder tapes having manual controlled means for simultaneously tilting one of the slats in the same general direction and provided with auxiliary tilting means for independently tilting a predetermined group of slats.

A further object of this invention is to provide a Venetian blind wherein a predetermined group of slats may be tilted independently of the position of tilt of the remaining slats and having means for securing the auxiliary adjusting means in adjusted position.

A still further object of this invention is to provide a Venetian blind wherein one group of slats may be tilted independently of the remaining slats which is simple and efiicient in construction and durable and lasting in use.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a front elevational view, partly broken away, of a Venetian blind forming the subject of this invention;

Figure 2 is an enlarged fragmentary view in vertical longitudinal section, partly broken away of the support for the blind.

Figure 3 is a perspective view showing the auxiliary control means for the Venetian blind forming the subject of this invention;

Figure 4 is a sectional view taken substantially on the section line i4 of Figure l; and

Figure 5 is an enlarged detail view of the attachment of the auxiliary control means through the tape of the Venetian blind.

Referring now more specifically to the accompanying drawings it will be seen that the improved Venetian blind forming the subject of this invention includes, as shown in Figure 1, a pair of ladder tapes supporting a plurality of slats 12 in vertical spaced relationship.

A support of the conventional channel type 14 is disposed above the slats and has mounted therein the conventional tilting means for all of these slats. This means usually comprises a longitudinal roller unit 9 disposed horizontally in the support 14 to which the upper ends of the usual pairs of tapes 10 are connected so that rotation of the roller unit 9 will raise one tape while lowering the other.

2,751,000 Patented June 19, 1956 all of the slats 12. In the usual construction of the tilting means 11 gear means are secured to one end of the roller for imparting rotation thereto. A conventional cord 16 is connected to the gear means 11 for operating the same.

Lift cords 18 are trained over

pulleys

15, 17, 19 in the support 14 between the tapes 10 of the pairs and pass through slats 21 in the support 14 downwardly through all of these slats and are connected to the lowermost of the slats as in Figure 1. By pulling on the free ends of the cords 18 which hang at one side of the blind through a slot 23 in the support 14 all of these slats will be raised or lowered depending on the movement of the cord 18 all in the usual well known manner. The conventional lock means comprising a dog 20 secured to the support 14 locks the cords 18 in adjusted position.

The auxiliary tilting means comprises a pair of cords 22 secured at one end to one side of each of the ladder tapes 10 and passing over a pulley 24 secured on the support 14. The cords 22 extend past opposite sides of the pulley 15, and are trained downwardly over

pulleys

17, 19 between the tapes 10 of the pairs and through the slots 21 and are secured to the tapes 10 adjacent the midpoint thereof and grommets 26 are provided on the tapes 10 for reinforcing the connection of the cords 22 thereto. From the pulley 24, the cords 22 hang through a slot 25 in the support 14 alongside the free ends of the lift cords 18 so that they are at the same side of the blind as said free ends of cords 18. A cord equalizer 28 connects the cords 22 so that movement of one cord will cause a like movement of the other cord.

The cord 18 is provided with a cord equalizer 30 for causing simultaneous movement of the cords 18. One of the free ends of one of the cords 22 is connected to the cord equalizer 30 on the cord 18. The free end of the other cord 22 is provided with the conventional tassel or pull. In practical use, after all of the slats have been tilted by means of the cord 16 the lower group of slats can be tilted independently of the upper group by means of the cords 22. As seen in Figure 4 when the upper group of slats is tilted to the closed position drawing on the cord 22 will cause the lower group of slats to be opened. Further, when the upper group of slats is open drawing on the cord 22 will cause the lower group of slats to be closed. The length of cord 22 between the equalizer 28 and the equalizer 30 should be such that upon drawing upon the cords 13 the lower group of slats will be stacked close to one another and when the first slat of the upper group is stacked against the lower group the cords 22 will be tightened to prevent entanglement with the tapes or slats.

The support 14 is provided with a dog 32 similar to the dog 20 for locking the cords 22 in adjusted position.

From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

What is claimed as new is as follows:

1. In a Venetian blind construction having a plurality of slats supported in vertically spaced relation on a pair of ladder tapes, and having a support disposed above said slats, means on said support for simultaneously tilting all of said slats in the same direction, lift cords connected for simultaneous operation and secured to the lowermost of said slats and extending through each This will cause tilting of of said slats and over bearing members on said support for raising and stacking said slats, the improvement comprising manually controlled means operable to tilt a lower group of the slats in one general direction to a desired degree, said last named means comprising a pair of tilt cords attached at one end to one side of each of said ladder tapes adjacent the midpoint thereof, said cords passing upwardly through the upper group of slats and over bearing members on said support, one of said tilt cords having the other end thereof secured to said first cords with a slack therein equal in length to the degree of lift of said lift cords in lifting and stacking said lower group of slats, whereby said tilt cords will be pulled tight by said lift cords when said lower group is lifted and stacked and said tilt cords will be maintained taut by said lift cords during lifting and stacking of the remaining slats to prevent said tilt cords from bunching between said remaining slats, and a cord lock connecting the cords of said second pair for simultaneous movement of both cords upon movement of one of said cords.

2. The combination of claim 1, said lift cords and tilt cords hanging from said support at one and the same side of the blind.

3. The combination of claim 2, said support having separate bottom slots therein through which said lift and tilt cords hang and preventing said lift and tilt cords from tangling together.

References Cited in the file of this patent UNITED STATES PATENTS 167,942 Seaman Sept. 21, 1875 2,116,356 Laborda May 3, 1938 2,459,517 Gearhart Jan. 18, 1949