US346678A

US346678A - Stephen palmer

Info

Publication number: US346678A
Authority: US
Publication date: 1886-08-03
Anticipated expiration: 1903-08-03

Description

(No Model.)

S. PALMER.

WINDOW BLIND SLAT.

No. 346,678. Patented Aug. 3, 1886.

lJNiTED STATES ATENT FFICE.

STEPHEN PALMER, OF LANSINGBURG, NEYV YORK.

WINDOW-BLIND SLAT.

SPECIFICATION forming part of Letters Patent No. 346,678, dated August 3, I886.

Applicatiqi filed December 3i, 1885. Serial No. 187,265. (No model.)

To all whom it may concern.-

Be it known that I, STEPHEN PALMER,2L resident of Lansingburg, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in Vindow-Blind Slats; and I do hereby declare that the following is a full, clear, and exact description of the invention, that will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Similar letters refer to similar parts in the several figures therein.

My invention relates to improvements in window-blind slats, and more particularly to I slats adjustable or rotary in the blind-frame.

size and depth approximating the size and length of the dowels or pivots which are formed on the ends of the respective slats. The dowels of the slats and the tenons of the rails are inserted in their respective seats and mortises in the stiles, and the stiles forced against the tenon-shoulders of the rails, where they are securely fastened, and when the individual slats are secured to the blind-rod the construction is substantially formed. It not unfrequently happens that the stiles warp and bend in use,which forces them slightly out of parallel and causes them to impinge upon the dowel-faces or slat ends so tightly as to make it impracticable to adjust them, or leaves the slats so loose they will not remain in the desired position to which they have been adjusted.

The object of my invention is to provide a blind-slat easily adjusted, adapted to resist the power of the elements to change its adjustment, and adapted to conform to changes in the relative position of the parts of a blindframe without materially enhancing the cost or changing thegeneral style of construction heretofore in use.

Figure l of the drawings is a front elevation ofa windowblind with a portion of the stiles broken away to show the slat-dowel'and their seats in the stiles. Fig. 2 is an elevation of the side of a detached stile facing the slats when framed. Fig. 3 is a plan view of a blindslat detached. Fig. 4 is a crosssection taken at broken line XX in Fig. 2. Fig. 5 is an end view of slat shown in Fig. 3. Fig. 6 is a central section of a metallic cap for the slat-dowel. Fig. 7 is a plan View of the open end or base of the cap.

A A are the stiles, and B B the rails of the blind-frame which support the-slats O. The slats are connected with each other in tne usual manner by a rod, B. Each slat is provided at its ends with a cylindrical dowel, D, adapted to enter a corresponding aperture or seat in the stiles. The seats a are formed in the usual manner by a bit or anger. The screw of the bit forms a small aperture, d, in the center of the bottom of the seat. By providing the dowelswith a tapering or beveled end, 6, projecting centrally from the end of the dowel, the point of which is a little smaller than the central aperture, (1, the beveled end will find its proper seat in the central aperture and pivotally support its slat.

I have ascertained by experiment that this method of construction has many advantages over the old method, among which are the following: The stiles being made of a soft yielding material, that part which surrounds the aperture (I will yield sufficiently to permit the beveled end of the dowel to be forced a considerable distance into the aperture after it has been advanced to contact with its edges or walls, whereby a firm seat can be given to all the dowels, notwithstanding the fact that some may be shorter than others, and that some of the seats may be deeper than others. Furthermore the bearing-points of the ends d being so near their longitudinal axis on account of their small diameter, the slats can be easily turned by rod R, even when a very considerable pressure is exerted by the stiles upon all the dowels. At the same time the resistance afforded by the pressure of the stiles upon some of the dowel ends will be sufficient to prevent the slats from rattling or being turned by the wind. In case the'stiles warp or bend slightly out of parallel, the result is simply to increase or diminish the pressure of the stiles upon some of the dowel ends without materially changing or afi'ecting the operation of the slats.

The mortises b in the stiles are adapted to receive the tenons shown by dotted lines in Fig. 1 of the rails, by which the frame is held together, as before described.

\Vhen desireththe conical ends of the dowels may be covered by similarly-shaped metallic caps E. (Shown in Figs. 6 and 7.) These caps may be swaged out of thin sheet metal and ings, or some of them, it being necessary to produce a point or vertex which will enter the mouth of the small central aperture, d.

The cylindrical portion of the dowel may be of any desired length or the dowels may be tapered from their shoulders g.

I am aware that a conical dowel or pivot and differential socket respectively on the slat and in the stiles are not new; but wherever used the shoulder around the larger end of dowel fits fiat down upon the surface around the top of the conical hole in stile; hence it does not answer my purpose. I am only aiming to improve the ordinary slat-blinds and stiles made of wood. The stiles are very liable to warp and the dowels to be slightly diferent in length, so that when put together they will not joint nicely, but make an unworkmanlike job,to which serious objections are made. By making my conical hole so small relatively to the cone or taper of dowel that the latter may be seated to a greater orless extent, I can always obtain a snug fit and turn out work to which no objection can be made; hence,

XVhat I claim as new, and desire to protect by Letters Patent, is

The combinatiomwith window-slats having tapered dowels or pivots, of the stiles A A. having below the seats a conical apertures d, which are made on a more acute angle than the dowels, as and for the purpose specified.

In testimony whereof I have hereunto set my hand this 28th day of December, 1885.

STEPHEN PALMER.

YVitnesses:

Gno. A. MosHER, (Jr-ills. L. ALDEN.