USRE10026E - Feldt - Google Patents

Description

.0. DE QUILL FEL D T. SPRING CURTAIN ROLLER.

Reissued Feb. 7, 1882 WITNESSES? g vwfihmfim;

ATTORNEY I UNITED STATES PATENT O FI E.

- CHARLES DE QUILLFELDT, on NEW YORK, N. Y.

" SPRING CURTAIN-ROLLER.

srncrrrcamoru forming part of- Reissued Letters Patent N 10,026, dated February 7,1882. 4 Original No. 159,803, dated February 16, 1875. Application for reissue filed November 17, 1881. I

To all whom it may concern:

Be it known that I, CHARLES DE QUILL- FELDT, of the city,.county, and State of New York, have invented certain new and useful 5 Improvements inWiudow-Shade Fixtures, of

which the following is a specification.

In shade-fixtures with spring-rollers of that class in which the spring-acted roller is locked by pivoted pawls dropping into recesses or ratchets of the fixed shaft the locking action was caused by the force of gravity whenever the shade was allowed to be slowly wound up by the spring-acted roller. Thelockin'g action by gravity, howcv er, could not take place when r 5 the shade was allowed to follow quickly the motion of the roller as imparted by the spring, I as iuthis oasetheipawlwas prevented from, dropping into thcrecesses; This feature forms a main objection to the shade-fixtures with springrollers, as by the sudden escape of the shade from the hands of the person trying to adjust the same the shade is wound'up with great rapidity around the roller and exposed to damage and injury in consequence of it.

2 5 This happens often even to persons conversant with the peculiarities of these rollers, and still more frequently to persons who are not familiar with them, as they are not aware that a repeated pulling at the tassel of the shade and feeling for the pawl are necessary until the gravity pawl engages the notched shaft or ratchet of the roller, so as to retain the shade in position. This causes sometimes great annoyance and dissatisfaction with this class of eurtain-fixtu res, though they are by their other advantages greatly preferable to the common cord or other roller-turning devices.

My invention has reference to an improved "con struction of-spring shadc-rollers-in which,- 40in place of the gravity-pawl used heretofore,

centrifugal pawls are substituted, whereby the shade is positively and in an entirely automatic manner stopped and retained at any desired point or height without any possibility of the sudden escape and rapid winding up of the shade, so as to expose the shade to injury by the continuous and unexpected action of the roller-sprin g.

The invention consists of a spring-roller to the end plate of which are applied pivoted pawls, which are thrown by centrifugal force,

owing to the action of the spring, against fixed stops of the end pl ate and against a stat ionary" stop exterior to the end plate of the roller,"

but in the path of the pivoted pawls when thrown out, In this position of thepawls the pivots of the same, the stops, and the stationary contact-stop form three binding-points for thepivoted pawls, whereby the absolute and positive stoppage and retention of the roller are secured whenever the centrifugal force overcomes the gravity of the pawls, while by the slow upward motion of the sliadethe centrifugal force does not overcolneihe gravity of the pawls and allows'them to clear the stationary exterior stop.without bimlin'g thereon.

The invention consists more especially of a.

spring-roller the end plate of which is provided with eccentricnlly-pivoted pawls moving in stop-recesses of the end plate, in connection with aniuclosing cap secured to the fixed shaft of the roller and having a stationary ram or stop within the path of the centrifugal pa'wls' when thrown out.

In the accompanying drawings, Figure 1 represents afront elevation of myimproved shadefixture applied'to a window-curtain; Fig. 2,

a detail vertical longitudinal section of the same; Fig. 3, a detail inside view of the rollercap; and Fig. 4, an .end view of the springroller, partly in section on the line a: w, Fig.2.

Similar letters of reference indicate corresponding parts.

' In the drawings, A represents a windowshade; B, its roller, having a spiral spring, 0, fitted within the interior hollow part. of the same, said spring being attached at one end to the roller and at the other end to a project-- ing' axle or shaft, a, which is set by its flattoned sidesintea fixed supporting-bracket, so as to be held in a stationary position, while the roller turns readily thereon by the action of the spring, as customary in this class of springrollers. The roller B isprovided with an end plate, D, which is screwed or otherwise attached to the end of roller B and supplied witheccentrically-pivoted centrifugal pawls D; These pawls D are arranged within recesses b ofthe end plate, D, said recesses forming at due side of the pawls D stops d,against which the pawls are thrown whenever the centrifugal force exerted thereon by the roller-sprin g overshorter and steeper side is arranged toward the.

direction of motion of the roller when the same is wound up by the spiral spring, while the other longer'and gentler inclined side is arranged toward the opposite-or unwinding direction of the roller. The unwinding motion of the roller carries the pawls past the cam or stop E without engaging the same as the pawls are forced back by thccontact therewith. If it is desired to wind up the shade, the roller is allowed to turn slowly, in which case the 'pa'wls clear the stop or ca-m E by gravity. Whenever it is desired to stop the shade at any point or height the roller is allowed to turn quicker, so that the centrifugal force imparted to the pawls overcomes their gravity and throws them into the path of the stationary stop E. Thecontact of the pawl D"with the stationary stop E and its side stop, (I, interrupts the rotation of. the roller andstops the shade. In this position of the pawl D the pivotpin of the same, the side stop, d, and the stationary stopE form three bi nding-points,which are so disposed relatively to each other as to cause the reliable locking of the pawl and roller. Shonldthe shade be suddenly released, intentionally or accidentally, the pawls are instantly thrown out by the centrifugal force imparted thereon by the rapid turning of the roller, so as tostrike against one of the fixed stops d of the end plate and against the stationary stop E, and be locked thereby in a positive and automatic manner. This forms the essential feature of my invention, as con tradistingnished from the action of springrollers with gravity-pawls.

Having thusdescribed my invention, I claim as new and desire to secure by Letters Patent- 1. The combination,in a spring shade roller, of the end plate, having pivoted centrifugal pawls and stops for the pawls, with a stationary contact-stop exterior to the endplate, against which and the stops of the end plate the pawls are thrown whenever the centrifugal force overcomes the gravity of the pawls,

' substantially as set forth.

2. In a spring-roller, the combination-of the end plate, having pivoted centrifugal pawls and stops for the pawls, with a stationary ez'zterior contact-stop which is engaged by the pawls when they are thrown out by centrifugal power, but which is cleared by the same when their: gravity overcomes the centrifugal force, substantially as and for the purpose set forth.

3. In a spring shade-roller, the combination of centrifugal pawls pivoted to the end plate of the roller, a stop foreaoh pawl, and a stationary'contact-stop secured to the fixed axle or shaft of the roller, said contact-stop projecting into the path of the centrifugal pawls, so that the roller is stopped by the pawls when they are thrown by centrifugal force against the stops, as described.

4:. In a spring shade-roller, the combination of centrifugal pawls applied to pivots of the end plate of the roller, a stopfor' each pawl, a

stationary contact-stop within the path of the centrifugal pawls, the pivot of each pawl, the i stop of each pawl, and the stationary contactstop being so arranged relatively to each other as to form three'binding-points for the pawl and lock the spring-roller when the centrifugal force exei ted on the pawls overcomes the gravity of the same, substantially as set forth.

5. The combination, in a spring shaderollcr, of an end plate, having eccentrically-pivoted centrifugalvpawls and a fixed stop for each pawl, with a stationary contact-stop secured to the fixed axle or shaft of the roller, substan-' tially as set forth.

6. The combination, in a spring'shade-roller, of the end plate, I), having pivoted centrifugal pawls D and fixed stops (1, with a stationary exterior cam or stop, E, substantially as described. t

7. The combination, in asprin g shade-roller, of the end plate, D, having centrifugal pawls D and stop-recesses b d, with an inclosing-cap, E, secured to the shaft a, and provided with a cam or stop, E, substantially as specified.

PAUL Go-EPEL, CARL KARP.

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