US299239A - Spring shade-roller - Google Patents

Description

(No Model.)

9. BfMAssEY. SPRING SHADE ROLLER. No. 299,239. Patented May 27, 1884.

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GIDEON B. MASSEY, OF MOUNT VERNON, NEIV YORK, ASSIGNOR OF ONE- THIRD TO LOUIS A. GARNETT, OF SAN FRANCISCO, CALIFORNIA.

SPRING SHADE ROLLER.

SPECIFICATION forming part of Letters Patent No. 299,239, dated May 27, 188%.

Application filed October 23, 1888.

To aZZ whom it may concern:

Be it known that I, GIDnoN B. Miissnv, of Mount Vernon, in the county of WVestehester and State of New York, have invented a new and useful Improvement in Spring Shade- Rollers, of which the following is a full, clear, and exact description.

If a window-shade secured to aspring shaderoller of the usual construction is suddenly released, the spring revolves the roller with great rapidity, and the shade is wound on the roller, the bottom stick of the shade is carried around the roller, the cord attached to the shade is wound around the roller, and the spring in the roller is entirely uncoiled,thereby causing inconvenience and necessitating the unwinding of the cord and the readjusting of the roller.

The object of my invention is to provide a new and improved spring shade-roller which is so constructed that when the shade is suddenly released the roller will be checked and will be prevented from winding up the shade too far.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a longitudinal elevation of my improved spring-roller and a window/shade attached to the same, parts being broken out and others shown in section. Fig. 2 is a cross sectional elevation of the same on the line 00 00, Fig. 1, showing the position of the roller when it is locked. Fig. 3 is.a cross-sectional elevation of the same on the line y 3 Fig. 1, show ing the roller when it is unlocked. Fig. t is an end view of the roller.

The spring shade-roller A is provided at one end with a ratchet-wheel, B, in the usual manner, and with endpivots, G and C, of which the former extends into a Vertical slot, D, formed in a plate, E, secured in the window-casing. .A bent spring, F, secured to the window-casing, has its free end resting against the bottom of the pivot 0, thus press ing the same upward. A pawl, G, is pivoted to the window-casing in such a manner that (No model.)

its free end can rest on the teeth of the ratchetwheel B, which pawl G is pressed upward by a bent spring-wire, H, secured to the windowcasing, the free end of the said spring-wire being bent under the pawl G, so as to press the pawl upward against a stud, J, projecting from the window-frame. In place of the bent spring-wires F and H, band-springs or spiral springs can be used.

The operation is as follows: If the shade K, secured to the roller A. is to be unwound, the shade is pulled downward and the strain on the shade draws the shade roller downward, whereby the spring F will be pressed downward and the ratchet-wheel B will be disengaged from the pawl G, thus permitting the roller to revolve in such a manner as to unwind the shade. As soon as the shade is released the spring F presses the pivot 0 upward, thereby engaging the end of the pawl G with the teeth of the ratchet-wheel B, whereby the roller will be locked in position. the window-shade is to be raised-that is, wound on its rollerthe shade is pulled downward slightly, so as to disengage the ratchet wheel 13 from the pawl G, and then the strain on the shade is diminished, so as to permit the roller to revolve; but the strain must still be sufficient to keep the spring F depressed and the ratchet-wheel B lowered to such an extent that the ratchet-wheel cannot engagewith the pawl. If the shade-cord breaks or the shade the roller with great rapidity, as the spring F will throw the pivot O, the ratchet-wheel B, and the corresponding end of the roller upward as soon as the shade is released, thus engaging the ratchet-wheel with the pawl G and locking the roller in place; or, in other words, the shade can only be wound. on the roller as long as there is sufficient strain on the shade to keep the spring F depressed, and as soon as the shade is entirely released the strain is removed and the roller is locked in position, whereby the roller is prevented from raising the shade too rapidly and tearing the shade or winding the cord on the roller, and at the same time the entire uncoiling of the spring is released suddenly, it will not be wound on I 1 neeted with the spring in any suitable manner.

' adapted to engage with the ratchet-wheel, and

2. The combination, with a spring shade-r011- er, of a spring'for pressing the end provided with a ratchet-wheel. upward, the pawl G, as new and desire to secure by Letters Patent adapted to engage with the ratchet-wheel, the

1. The combination, with a spring shadecheek-stud J, and the spring H, for drawing roller, of a spring for pressing the end prothe pawl against the stud J, substantially as vided' with a ratchet-wheel upward, a pawl herein shown anddeseribed.

GIDEON B. MASSEY. a spring for holding the pawl raised to a eer- I \Vitnesses: tain position, substantially as herein-shown J Ann's T. GRAHAM, and described. 1 O. SEnG-wIeK.

in the roller is prevented. The pivot G is con- Having thus described my invention, I claim

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