US823745A

US823745A - Shade-fixture.

Info

Publication number: US823745A
Application number: US28131505A
Authority: US
Inventors: Scott Stewart
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-10-04
Filing date: 1905-10-04
Publication date: 1906-06-19
Anticipated expiration: 1923-06-19

Description

No. 823,745. PATENTED JUNE 19, 1906.

S. STEWART.

SHADE FIXTURE.

APPLICATION FILED OOTA, 1905.

- 50 V JNVENTOR WITNESSES: Q2421 57M G164. T: 4 W

27 I lb/OM W SCOTT STEWART, OF FAIRMONT, WEST VIRGINIA.

' SHADE-FIXTURE.

Specification of Letters Patent.

Patented. June 19,1906.

Application filed October 4, 1965. $eria1 No. 281,815.

To all whom it may concern.-

Be it known that I, Soor'r STEWART, a citizen of the United States, residing at Fairmont, in the county of Marion and State of West Virginia, have invented certain new and useful Improvements in Shade-Fixtures, of which the following is a specification.

My invention relates to improvements in shade-fixtures, and has for its object the provision of a device, preferably located on one of the spindles of the-shade-roller, for pre venting the shadeor curtain being entirely wound upon the roller when the clutchmechanism at the other end of the roller fails to work properly or other accidental means causes the curtain or shade to wind up rapidly. In raising a curtain or shade which winds upon a spring-actuatedroller when the hand is released from the shade in many cases the shade will wind upon the roller by the action of the spring, the clutch mechanism failing to work, and the shade is wound to its extreme limit on the roller, often causing injury to the shade and annoyance to the operator. It is to revent this contingency arising that I app y my device to a spring-actuated roller of a curtain or'shade. The rapid rotation of the shade-roller in winding the shade thereon causes my; device to become operativeto retard and stop the rise of the curtain. V

A further object of the invention is to improve curtain-fixtures in certain other par-v ticulars, as will be explained.

The invention consists, broadly, of means carried by the spring-roller which when the centrifugal action caused by the rapid rotation of the roller becomes great enough will be thrown out to travel'in a ath having an immovable obstruction therein, and the contact of this centrifugally-operated means with the obstruction retards and stopsthe rise of the curtain.

The invention further consists in the use of an adjustable friction member located upon one of the spindles of the roller, whereby-the power of the spring roller may be varied and regulated, and the action of the means for stopping the rapid rotation of the roller and sha e in windin -may be gradual; and the invention still rther consists in certain novel features of construction and combinations and arrangements of parts, as will be pointed out in the claims.

In the accompanying drawings I have illustrated one example of thecomplete physical ism of Fig. 7.

embodiment of my invention made according to the best mode I have so far devised for the practical application of the principles and a modified form of the detent or stoparm used in the device.

Figure 1 is a view showing a curtain-shade partly wound upon a roller embodying the. Fig. 2. is.

novel features of my invention. an enlarged front View of one end of a spring-roller having my stopping deviceapplied thereto. tional view of Fig. 1, the bracket being omitted. Fig. 4 is a view With thecover omitted of a box or casing which is located. on a spindle of the roller and has a pivoted stop-arm or-detent therein. Fig. 5 is an end view. of Fig, 2. Fi 6 is a lan: view of a friction member inc uded in t e invention. Fig. 7 is a broken sectional'view showing the end of the roller at the left of the shade. .Fig. 8 is a sectional view showing the clutch mechan- Fig. 9 is a plan view of one of the clutch members. Fig. 10 is .a similar view of a second clutch member. Fig. 11 is a side View of the bracket at the left-hand or spring end of the roller. viewof a part of the bracket in Fig. 11, and

- Fig. 13 is a view of a modifiedform of the detent or stop-arm, and Fig. 14 illustrates its application to a roller.

'With the addition of a peculiar form of one of the roller brackets or hangers my invention is adaptable for use with shades or curtains as now placed upon the market.

In applying the device for use theroller 1. upon which the curtain or shade 2 is to be wound is provided with a spindle 3, which may be a screw havin a head 3, which head acts as a journal for t e roller and revolves in the bracket 4, the other bracket-4' being of Fig. 3 1s a central-vertical sec-- Fig. 12 is a detached a fp eculiar construction, to be described hereina t Upon the spindle 3 and located next the roller '1 is a friction member 5, preferably of leather or otherflexible and tough material, and between said friction member or disk 5 too and the head 3 of the spindle is interposed the metallic casing 6, having a slot 6 in its circumferential wall. The head 3 bears directly against the cover 7 of thecasing 6, and said cover as well as the casing and disk each have an opening in their centers through which the spindle 3 may be passed. It will be understood from this construction that the roller, friction member, and casing are-held in frictional contact by the head 3 and tha they rotate together, with the head 3 as a journal.

Within the casing 6 an arm or detent 8, having a counterbalancing weighted end 9, is pivoted at point 10. The end of the detent 8 in normal position is located in the slot 6 of the casing, and when in operative position said detent projects through the slot, as will be explained. The bracket 4 is provided with an extension or catch-arm 11, which projects horizontally over the plane of travel of the casing 6 in rotating.

In operation suppose the shade has been pulled down slightly, with a view to raising or adjusting it. If the clutch fails to work and the hand is released from the shade, the spring rotates the roller rapidly, winding the shade thereon. The rapid rotation of the roller, friction member, and easing on the journal causes the detent or arm 8 to be thrown out by centrifugal action, and said arm is projected through the slot 6 and travels round with the casing 6. In its rotation the arm strikes against the extension or catch-arm 11 of the bracket 4 and retards and stops the rotation of the entire shade.

The screw 3 may be turned to a greater or less de ree for regulating the friction between the re ler and the stopping mechanism. When the screw is turned tight, the roller, friction member or disk, and easing rotate as one, and when the arm 8 contacts with the catch-arm 11 the winding of the shade is stopped suddenly. In many instances it is desirable that the shade should not be stopped suddenly, but gradually. To provide a gradual stopping or retarding of the rotation of the roller, it is only necessary to release slightly the binding pressure of the roller, disk, and casing by unscrewing the spindle 3, thus reducing the friction between the members. In this condition when the arm 8 strikes the catch-arm 1 1 the sudden shock of contact is taken up and the force expended in the friction between the members as the rotation is gradually retarded.

While, as before stated, the invention is applicable to usual construction of shaderollers, I prefer to employ, in combination with my stopping mechanism, a peculiar and novel clutch winding mechanism and bracket for the left-hand end of the shade and roller.

As illustrated in Figs. 7 to 10, inclusive, the rod 12 has secured thereto a non-rotating spindle 13, which carries the disk 14. Disk 14 has a plurality of cam-notches 15 15 and is surrounded by the ring or open disk 16, having notches 17 therein, the whole being inclosed on the end of the roller 1 by a thimble 18. Balls 21 are seated in the notches 17 and tend to connect the two

clutch members

14 and 16 as usual.

The bracket 4 (illustrated in Fi .11) is provided with a series of holes 25 on an arc struck from the journal center of the bracket.

An enlarged opening is cut around the center of the bracket, and over the edges 26 of the opening tongues 27 of the pawl 28 clench said pawl to the bracket 4. Thus it will be seen that the pawl may be turned within the opening, guided by the tongues, to adjust the pawl so that its slot 29 will be in position to receive a variety of spring-rollers, and the pawl is locked in its adjusted position by inserting the spring tongue or end 30 into one of the holes 25.

While I have shown only one completed example of the physical embodiment of my invention, it will be understood that minor changes and alterations may be made without departing from the spirit of the inventionas, for instance, in the modification illustrated in Figs. 13 and 14. The detent S has a slot therein, as 31, which surrounds the spindle 3, and is adapted to slide, when thrown out by centrifugal force, in the groove 32 and project through the slot or opening 6 in the casing 6. The casing illustrated has no cover, but the head 3 of the spindle bears against a convex disk 33 in the casing,which provides for a spring action similar to that of head or cover 7.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with a shade-roller and its clutch mechanism of means for automatically stopping said roller when the roller rotates at an excessive speed and a friction de i ice adapted to render said stopping gradua 2. The combination with a spring-actuated roller and its clutch mechanism, of a fixed obstruction, centrifugally operated means on the roller adapted to contact with said obstruction when the roller rotates at an excessive speed, and friction means to render the resulting stopping gradual.

3. The combination with a shade-roller and its clutch mechanism, of a fixed member having an obstruction thereon, centrifugallyoperated means on the roller adapted to contact therewith to stop the accidental winding rotation of the roller, and friction means for rendering said stopping gradual.

4. The combination with a spring-operated shade-roller and its clutch mechanism, of a casing, a pivoted detent therein adapted to be moved by centrifugal action, a spindle, a

bracket having a catch-arm in the path. of

centrifugal travel of the detent, and a friction member between the casing and roller.

5. The combination with a spring-operated shade-roller, of a spindle, a member thereon having a pivoted detent adapted to be moved by centrifugal action, a bracket havin a catch-arm in the centrifugal path of trave of said detent, and friction means for taking up the shock of contact between said detent and catch-arm.

6. The combination with a spring-operated shade-roller and its clutch mechanism, of a s indle, a member thereon having a pivoted etent adapted to be moved by centrifugal action, a fixed obstruction in the centrifugal path of travel of said detent, and friction means located between the roller and the detent forgradually stopping the winding rotation of the roller.

7.- The combination with a spring-operated shade-roller and its clutch mechanism, of a spindle, a slotted casing thereon having a pivoted detent'therein, a bracket and an obstruction thereon in the path of centrifugal travel of said detent, and a friction member located on the spindle between the casing and roller.

8. The combination with a shade-roller and spring-rod having a notched disk thereon, a spring adaptedto impart motion to the roller in one direction an open ring surroundin said disk and provided with notches, and ba ls to engage said notches means for stopping the winding rotation of the roller when the roller rotates at an excessive speed, and friction means for rendering said stoppage gradual.

In testimony whereof I affix my signature in presence of two Witnesses.

SCOTT STEWART. Witnesses:

W; A. LAWLER, I O. P. McKrNNEY. I g