US169450A - Improvement in curtain-fixtures - Google Patents

Description

UNITEDN STATES OFFICE- EZRA B. LAKE, 0F TOMS RIVER, NEW JERSEY.

IMPROVEMENT IN CURTAIN-FIXTURES.

Specification forming part of Letters Patent No. 169.450 dated November 2, 1875; applicationflled November 7, 1874.

To all whom 'it may concern Be it known that I, EZRA B. LAKE, of Toms River, in the county of Ocean and State of New Jersey, have invented a certain new and useful Improvement in Gurtain-Fixtures5'and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification, in which--4 Figure 1 is an end view of my invention. Fig. 2 is an inner end view of gearing for imparting motion from roller to spring-barrel. Fig. 3 is a detail view. Fig. 4 is a vertical central section through roller, spring, and gearing, Ste. Fig. 5 is a horizontal section through roller-bracket.

This invention has relation to curtaindixtures; and consists in the novel construction and combination of parts having reference to, severally, the employment of an adjustable roller-bracket; the provision of a brace-pawl acting upon the roller-shaft, and adapted to engage therewith and arrest the motion of the roller when the latter tends to rotate rapidly; the provision of gearing and other appliances for effecting the compression of a coiled spring through the rotation of the roller, whereby a short spring is rendered serviceable in connection with a long curtain; and, nally, the provision of means for securing Vthe curtain to the roller without danger of injury to the working parts or clock` work mechanism.

Referring to the accompanying drawings, A designates the curtain; B, the roller; and C, the adjustable bracket. The bracket is composed of two sections, a b. The section a is an L-shaped plate having its foot secured to the window-frame, its outer end bent laterally and slotted at al, and flanges or guides provided at a? a2. The section b is an elongated plate having a triangular eye, b1, for the reception of the end of the roller-shaft, and having toothed llanges b2, which, when the section b is passed through the slot a1, lie between the ilanges a2, the teeth engaging at any desired position of adjustment with the beveled bridge of the slot. c is a button, pivoted to the back of the section a, and formed with a U-shaped projection, c', which embraces the lower edge of the' bracket, so as to 1 hold the two sections together. The section b is inserted or removed through the slot by turning it obliquely to the plate a, so as to avoid the slot-bridge b3, the slot being continued beyond the bent end of the section a, as shown. D designates what I term a bracepawl, to distinguish it from other forms of curtain-pawls intended to operate by centrifugal impulse. The pawl D is of an approximately V shape, and is pivoted to the end of the roller-by apin passing through its apex. The tail l iselongated, and ot' a form adapted to its peculiar functions. ,The shaft C has a notch or shoulder at e for the engagement of the pawl, and is evenly curved or rounded on its surface to correspond to the form and position of the shoulder.

When the pawl is hanging in its normal position its upper or brace end just clears the shoulder e, its Weight being counterbalanced by that of the tail-pieceor pendant d. If, now, the roller be turned slowly in the direction required to elevate the curtain, the impulse being given by means of a spring, or, if the roller be turned in the direction required to unroll the curtain, the pawl will not be caught by the shoulder. It', however, the roller be allowed to rotate rapidlythat is, if the curtain be releasedthe tail-piece d will be thrown outward cent-rifugally, cau sing the brace to engage instantly with the shoulder on the shaft and arrest the motion of the roller.

The brace-pawl, as specifically described, I consider an important feature of my invention 5 but I do not wish to be understood as claiming, broadly, a centrifugal pawl irrespective of its form, arrangement, or function.

I- regard my brace-pawl as an improvement, specially on what may be termed a drag pawl--that is, a pawl having a tail-piece formed with an inwardlyprojecting head or barba device which I have discarded the use of on account of its uncertainty of action and difficulty' of management.

E designates a metallic casing or box applied to one end of the roller, to contain the roller-spring and the mechanism pertaining thereunto. El designates the spring coiled around the stationary shaft, and having its -r1ds, respectively, attached to the latter, and

.ter than the pinion f. Said gear-Wheel engages with a pinion, G, attached rigidly to the end of the roller proper, and forming the inner bearing of the stationary shaft. By the use of suitably-proportioned gearing, arranged as described, so as-to impart motion to the spring-barrel and Wind the spring, the roller may be made to turn several revolutions for every single revolution of the barrel, and thus a short spring be adapted to Work effectually in connection with a long curtain.

Theoperation of the roller is as follows: The curtain being iirst rolled up the roller is adjusted upon the brackets. Now, when the curtain is drawn down the roller turns in one direction While the spring-barrel turns in the reverse. The spring is thus compressed, and, by expansion, eii'ects the reversal of the roller and the rolling up of the curtain.

E designates a disk of Wood inserted in one end of the casing E. his a hole in the casing,

coinciding with said disk, through which may b e driven a tack to secure the curtain at the point indicated.

Having fully described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with the stationary shaft O', having a convoluted hub terminating its surface with the shoulder e, and the roller B operating automatically through the agency of a spring, of the brace-pawl D, having its tail-piece and locking arm joined at substantially an acute angle, the former being Weighted so as to control, by gravity, the normal position of the paWl and lock it against the shoulder e by centrifugal force, specically as shown and described.

2. The adjustable bracket C, composed of the section a, having the .ianges a2, slot al, and bridge b3, and the sliding section b having the notched ange b2, in combination with the lockin g device c, substantially as described and shown.

3. The combination, -WithV the stationary shaft C and the rotating barrel E2, of the rigid post or frame F3 carrying the gearing F4f, en-

gaging, respectively, With the 'pinion Gr attached to the roller, and the toothed Wheel F attached to the barrel, substantially as shown and described.

4. The rollerB having a cylindrical chamber, E, at one end containing a coiled spring, and a rotary drum, a pinion attached to the curtain-roller, and intermediate multiplying gearing or mechanism, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand this 19th day of October, 1874:.

EZRA B. LAKE.

Witnesses:

J oHN AUMAGK, GALEB FALKINBURGH.

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