US529770A - James g - Google Patents

Description

(No Model.)

J. G. WILSON.

'VENETIAN BLIND. No. 529,770. Patented N07. 27, 1894.

Fig .1; mm. Fig.3.

WITNESSES: V 7 INVENTOR. flw A%/" A; Somea wm ATTORN EY UNITED STATES PATENT OFFIC JAMES G. WILSON-OF NEV YORK, N. Y.

VENETIAN BLIND.

SPECIFICATION forming part of Letters Patent No. 529,770, dated November 27, 1894.

Application filed March 6, 1893.

To all whom it mag concern:

Be it known that I, JAMES G. WILSON, a subject of the Queen ofGreatBritian, anda resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Venetian Blinds, of which the following is a specification.

My invention has reference to improvements in window or other blinds of that charactercommonly termed Venetian blinds. In Venetian blinds embodying top bars as hitherto manufactured, the uppermost slat is suspended by short tapes from a supporting bar located at the upper part of the window frame, and from this slat theladders supporting the remaining slats are suspended. This construction complicates the structure and necessitates the use of a visible and heavy upper slat. The means for raising and lowering the slats hitherto employed consist of two or more cords passing over suitable pulleys in the supporting bar, then down through the slats and placed in connection with the bottom slat. The free end of 'the cords by which the slats are operated are secured together and rigidly attached to a handle or tassel. The inherent defects of. this construction are, that unequal shrinkage or elongation of the cords, as well as unequal drawing of the cords, unless great care is exercised, causes the blind to be drawn up unequally at opposite sides.

The objects of my invention are therefore, first, to simplify and improve the construction of the blind with respect to the arrange-' ment of the slat supporting devices, and secondly, to insure a uniform and regular raising and lowering of the blind.

The nature of my invention will best be understood when described in connection with the accompanying drawings, in which Figure 1 represents a face view of a Venetian blind embodying my invention. Fig. 2 is an end elevation of the same. Fig. 3 is a detail view of a modified form for the slat raising cord.

Similar letters of reference indicate corresponding parts throughout the several views of the drawings.

In the drawings the lettera designates the slats constituting the blind, which slats are the window framing.

Serial No. 464,864. (No model.)

supported by ladders b of any well known construction.

A is a turning bar located above the top bar 13 and supported 'to turn in suitable brackets c secured to'the top bar, which latter is rigidly secured in any usual manner to The upper ends of the tapes forming part of the ladders b are secured directly to the (turning bar A, the top bar having suitable apertures to permit the passage of said tapes. As usual the turning bar is operated by a suitable cord (1 (Fig. 1) to open and close the slats, or to set the same at any desired angle.

e is the cord for raising and lowering the slats, the general arrangement .of which is substantially the same as, usual, it being guided by suitable pulleys f g h on the top bar and has its ends secured to the bottom slat. However in place of using two cords andsecuring the same directly and rigidly to a handle or tassel'at their overhanging ends, I make use or a continuous cord, and connect the handle, tassel, or other similar device, loosely to the cord. In the example illus trated in Fig. 1, the loose connection of the handle ortassel i with the cord is effected by the use of a small pulley j mounted in said handle. It will be readily understood that if by reason of unequal shrinkage, or any other cause, there should exist a tendency for the slats to raise unequally, the handle or tassel will accommodate itself to the inequality by achange in position when in the act of raising the blind. Consequently the slats will always retain their horizontal positions and move freely and easily.

In the form shown inFigs3, the bow of the cord is located higher than in the previous example and the pulleyj is mounted in a strap j, which latter is connected by a cord I with the handle or tassel proper placed within.

I wish it to be distinctly understood that I do not restrict myself to the use of a pulley in connection with the slat raising cord; since it is evident that the handle or tassel can be connected to the same by means of astrap or eye fitting loosely about the cord, and thus form the loose connection which is the distinctive feature of my present invention. The reason that I prefer to employ the pulley is to reduce the friction and thus cause the handle to accommodate itself very readily to changes in the cord. Again, by the term handle or tassel, I do not wish to restrict myself to such specific devices as are at present cornmercially employed in connection with Venetian blinds, since it is evident that other devices can be substituted.

What I claim as new, and desire to secure by Letters Patent, is-

l. A Venetian blind having its slats strung upon a single cord passing twice through the slats in vertical lines and made fast at its ends to the bottom bar; the middle of the cord forming a laterally overhanging loop or bight, combined with a handle mounted loosely in said loop or bight, substantially as and for the purpose specified.

2. A Venetian blind having its slats strung upon a single cord passing twice through the slats in vertical lines and made fast at its ends to the bottom bar, the middle of the cord forming a laterally overhanging loop or bight after passing through the pulleys in the top bar, combined with a pulley fall operating in the loop or bight and having attached thereto a pendentoperatingcord,substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of "two witnesses, this 41th day of March, 1893'.

JAS. G. WILSON.

WVitnesses:

J As. STANSFIELD, WM. A. KoEDEL.

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