US70099A - Thomas lyons - Google Patents

Description

K v @it-tten.' tstrs gir-trut @fitta THOMAS LYo'Ns, or BROOKLYN, NEW YoRloAssieNou To HIMsELr AND JOSEPH B. KING, 0F THE SAME PLAGE.

Letters Patent No. 70,099, dated October 2'2, 1867.

IMPROVED CURTAIN-FIXTURE.

@tigt rlgehtle tiene tu in tigen ttttts @tout mit making niet nf tige smite.

TO ALL WHOM IT MAY ICONCERN:

Be. it known that I, THOMAS LYONS, of Brooklyn, in the county ot' Kings, and State of New York, have invented certain new and useful Improvements in Window-Shade Fixtures; and I do hereby declare that thc following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings,

making a portion of this specification, in whi ch- Figure 1 is a. longitudinal transverse section of a shade-fixture made according to my-invcntion.

Figure 2 is a. longitudinal section ofthe same taken at right angles to iig. 1.

Figure 3 is a face or front view showing a modification of the same.

Similar letters of reference indicate corresponding parts in all the figures.

This invention belongs to that class of devices designed to hold in position the cords of window-shades, and its object is to enable the saine or nearlY the same tension to be exerted on the cord, whether the slide of the device be placed higher o r lower with reference to the -frame thereof,l to suit the length ofthe cord, instead of increasing the tension in proportion to the upward movement ofthe slide, asin those 'cases where a spiral spring is used` f l aforesaid slide and the frame of the device, whereby the desired object is secured.

To enable others to understand the nature and construction of my invention, Iwillproceed to describe it 4 with reference to the drawings.

The frame ofthe fixture is shown at A, and may be attached in a vertical position to the side of the windowframe, by screws passing through suitable holes, a, at each end thereof. Formed centrally in this frame is a longitudinal slot, b, which is widest at its rearmost side, or, in other words', of a dove-tail1 form in its crosssection. C represents a dat slide, which is situated upon the frame A, longitudinal therewith, and furnished at its rearmost side with a spur, e, of adove-tail form, and fitted into the slot b in such manner that the said slot is' caused to act as a guide for the slide C in the longitudinal movements thereof, and also to hold thesame in proper contact with the fra-me A, the said slide being furthermore steadied at its lower end by' tw`o projections, d, formed upon the frame A, and situated oneupon each side of the slide. Provided upon the forward side of the slide, near the'upper end thereof, is a friction-roller, e, over which the lower end ofthe cord which operates to raise or lower the shade is passed when the device is in use, and which is kept in place upon its pivot a broad head, a, secured upon the end of the latter. The tension-spring is marked D in the drawings, and has itsf outer end portion coiled around a pin, m, fixed near one edge of t-he frame A, while its main lengtlimay be made slightly curved, as shown more plainly in4 fig. 2, the free extremity of the said spring resting upon a stud, g,

projecting forward from the lower end ofthe slide. This spring, with the adjacent portion ofthe slide, may be covered by a front plate, n, attached tothe frame A in front of the said parts, by the bent or angular ends of the said plate. l

When the fixture is in use, the spring D, by pressing downward the slide' 0 exerts the requisite pressure upon the cord by which the shade is raised or lowered; and, inasmuch as the change in the position of the spring, caused by the longitudinal movement of the slide, necessitates but` a slightly increased ceiling of the coiled portion ofthe said spring, it follows that the pressure .of the spring, and consequently the tension exerted by the .slide upon the cord, will vary but very" little, whether the slide he situated higher or lower, to suit the length of the aforesaid cord, the'practical' operation of the device being thus rendered much superior to those in which a spiral/spring is employed to operate the slide, and in which the compression of the spring produces an increased tension upon the cord. v

' If desired, instead of with a single spring, as shown in gs. l and 2, and hercinbefore described, the ixture may be furnished with two such springs, situated at 'opposite sides of the slide, but with their free extremities resting upon the same stud g, all as indicated-in dotted outline in g. 3, the operation of each spring being .the saine in thisi case as in that where a single spring is used as set forth.

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

The tension-spring, constructed as described, and arranged in relation with the stud m, the slide C, andthe frame A, substantially as and for the purpose speciied.

` .THOMAS LYONS.l

Witnesses J. BRENNAN, 4 A. Ln CLERC.

The invention consists in a novel construction and arrangement of a. spring with reference to a stud on the

Images