US399448A - Curtain-roller - Google Patents

Description

(No Model.)

A. SWEETLAND.

CURTAIN ROLLER.

No. 399,448. Patented Mar. 12. 1889.

UNiTEn STATES PATENT OFFICE.

CURTAIN-ROLLER.

SPECIFICATION forming part of Letters Patent No. 399,448, dated March 12, 1889.

Application filed August 13, 1888- Serial No. 282,529. (No model.)

T 0 aZZ whom it may concern:

Be it known that I, ALVAH SWEETLAND,of Syracuse, county of Onondaga, in the State of New York, a citizen of the United States, have invented certain new and useful Improvements in Curtain-Rollers, of which the following is a specification, reference beinghad to the accompanyin drawings, in which Figure 1 is an end elevation with the cap removed; Fig. 2, a vertical section central to the spindle; Fig. 8, a plan view of the front of bracket; Fig. 4:, a like view of its back; Fig. 5, an end view of same; Fig. 6, a side elevation thereof.

My invention relates to spring-actuated curtain-rollers and to the locking devices to catch the roller at any desired point and hold it against rotation, and especially to locking devices which are actuated by the quick upward rotation of the roller, as contradistinguished from those rollers in which the looking device operates by the slow rotation of the roller, and, further, to those which lock by means of a pawl thrown outward from the center by contact with a hub upon the end of the roller and locked into a rim of substantially the same diameter as the roller, and look by means of a hook drawn into notches in the rim, as contradistinguished from those which employ a gravity-pawl engaging with a ratchet upon the hub; and my invention also relates to the brackets for supporting the roller.

The obj ectof my invention is to produce a spring shade-roller which shall be locked against rotation by the quick upward movement of the curtain.

My invention consists in the several novel features of construction and operation hereinafter described, and which are specifically set forth in the claim hereunto annexed.

It is constructed as follows:

A is a spring shade-roller, of ordinary construction as to the roll, spring, and spindle within the roll.

B is the spindle, having a flattened head, 1, and 2 is an arm secured to the spindle and having hooked pawl 3 pivot-ally connected to its outer end, 4: being the hook, and 5 being a lug or stud upon the back side of the pawl substantially opposite the hook.

C is a plate secured to the end of the roller and provided with a central rectangular boss, 3 (5, having angular corners 7, and further provided with the multiple-curved flanges 8, the ends of which are beveled, as shown, creat- 1 ing the openings 9 between the flange-sections. It will be observed that each corner or shoulder 7 has an opening, 9, opposite. D is my bracket, consisting of a body, a base, and a head, which head is provided with a vertical slotway, 10, and a horizontal slotway, 11, opening into the slotway 10. Both of these slotways are beveled, substantially as shown, and backward from the outer face of the bracket, in order to reduce the bearin -surface and prevent the gudgeon 12 of the rollerfrom binding. 'When this gudgeon 1 is introduced into the bracket, it has a tril angular bearing, twov of the bearing-points i being the corners at the intersection of the l slotways, these corners being beveled or rounded, if desired. l It is operated as follows: The rotation of the roll to wind up the curtain carries with it the annular notched riln, the spindle and 1 the arm upon the spindle remaining stationl ary with the pawl dependent and resting upon 1 the periphery of the hub, or contiguous thereto, so that the quick rotation of the roll lthrows the shoulder upon the hub against l the shoulder upon the pawl, and when the l otation is quick enough the pawl is thrown upward, so that the point of the hook will catch upon a beveled point or edge of one of the rim-notches, and the movement of the roll will carry the edge of this notch clear into l the hook, thus giving a positive lock in such l a manner that the pawl-hook cannot be disl engaged from the edge of the notch by any jumping or recoil of the roll on account of its 1 quick stoppage. I bevel the edges of the notches, first, in order that the hook may the i more readily engage with the thin edge, and, l secondly, in order that the edge of the notch 1 may fit within the cavity of the hook closely l and tightly by frictional contact. li It will be observed that the flanges h tol l gether constitute an annular rim, and the spaces between form beveled notches, with which the .hook engages; and that if from any cause the pawl is disengaged from a l notch the roll cannot wind up so as to carry the curtain to the top of the window, as the lug 5 will be engaged by one of the corners or shoulders 7, which will then be in motion, and will throw the pawl into one of said notches and prey en t further movement of the roller.

It will also be seen that the hook of the pawl operates as a positive lock to hold the roll againstrebound and until it is released by drawing down the curtain.

I am aware that gravity-pawls engaging with notches in an annular rim have hereto fore been used; but I am not aware that a hooked pawl thrown outward by a knocker secured to the roller, so as to hook into a beveled notch in an annular rim, has ever been used.

\Vhat I claim, and ters Patent, is

In a curtain-roller, the combination, with the roll proper, aplate provided with *a rectangular central hub the corners of which constitute shoulders, and multiple-curved desire to secure by Letflanges opposite the straight sides of the hub with spaces or openings between them opposite and equal in number to the corners or shoulders of said rectangular hub, of a stationary spindle, a stationary spindle, a pawl, 23, providing a deep notch for the effectual en gagement with the ends of said pawl being clined-face lug, 5, at the back of the pawl opposite the hook 4, whereby of the roll said lug is engaged by any one of said shoulders and the hook of the pawl thrown into flanges, substantially as shown and described.

arm upon the having a hooked end, at,

flanges, said pivoted to the arm, and an iiiwith the rotation engagement with one of said In Witness whereof I have hereunto set my hand this 25th day of July, 1888.

ALVAII SIYEETLAND.

In presence of O. \V. SMITH, SAM. H. WANDELL.

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