US1452874A - Curtain roller - Google Patents

Description

F. H. HART CURTAIN ROLLER Apr. 24, 1923.

Filed Sept. 19, 1921 INVENTOR.

BY% jg A TTORNEYS.

Patented Apr. 24, 1923.

UNITED STATES PATENT OFFICE.

FRANKLIN H. HART, OF NEW HAVEN, CONNECTICUT, ASSIGNOR T C. AND COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CURTAIN ROLLER.

Application ,filed September 19, 1921 Serial No. 501,533.

TocZZ w ho'm it may concern;

Be it known that I, FRANKLIN H. HART, a citizen of the United States, residing at New Haven, county of New Haven, State of Connecticut, have invented an Improvement in Ourtain Rollers, of which the following is a specification.

This invention relates to curtain or shade rollers and has for an object to provide an improved curtain roller in which the pawls will be held against rattling.

It is a further object of the invention to provide a curtain roller having the usual pair of pawls pivoted on the rotating portion of .the roller adapted to coact with a recess in the stationary element to hold the roller against turning, in which means is provided, operated by the holding pawl, for preventing rattling of the tree pawl.

With these and other objects in view I have devised the structures disclosed in the accompanying drawing in which,

F igl 1 is a front elevation of my improved roller showing a curtain or shade in position 25 thereon.

Fig. 2 is an end view of same.

Fig. .3 is a longitudinal sectional view at the pawl end of the roller on a somewhat enlarged scale.

Fig. 4 is an end view of the form shown in Figs. 1 to .3 also on an enlarged scale.

Fig. 5 is a similar view of a slightly modified form, and

Fig. 6 is a similar view of a still further modified form. o

The roller comprises the usual stationary element 10 and the rotating element 11 forming the usual spool on which the curtain 12 is wound. The stationary element 10 is secured. at its opposite ends in brackets 13 which are adapted for attachment at the top or any portion of the window by suitable screws 14. In the present instance this sta tionary element is a cylindrical rod fastened 45 by any suitable means such .as a pin 15 in recesses in the brackets 13. This rod or a boss on the bracket is providedwith a recess 16 which, when the roller is placed in position, is on the top of the stationary element, 50 as shown in the drawing. The rotating shell 11 is closedat its opposite ends by suitable.

discs 17 to one of which discs are pivoted by suitable rivets 18, a pair of pawls 19, so that these pawls are carried about the stationary member as the shell rotates in winding and unwinding the curtain in the usual manner. A coiled spring 20 is provided within the roller tending to rotate the shell in the direction otthe' arrows to wind up the curtain, Each pawl is provided on its inner side with a projecting lug 21 which is adapted, when the shell is rotated, to seat in the recess 16 and hold the shell against turning as is usual in this class of devices. Each pawl is, however, provided with a curved projection 22 of sufficient length that i when the lug 21 of one pawl is within the recess 16, the end thereof will press against a short projection 23 on the other or free pawl on the opposite side of its pivot, and tend'to turn said free pawl about its pivot 18 and hold it against any suitable part of the rotating element, such as the flange 24. The, pawls are pivoted on the disc 17, a sufficient distance from their center of rotation, that the reaction of the holding shoulder 25 of the recess 16 pressing on the lug 21 of the pawl tends to rotate the pawl counterclockwise, as viewed in Fig. 4. This presses the end of the long projection 22 against the side of the short projection '23 on the free pawl tending to turn it clockwise, as viewed in Fig. 4, on its pivot 18 and hold it in contact with the flange 24.' The pawl may be so shaped that the curve of the projection 22 rests against this flange or there may be provided a second lug26 to contact with the flange. It will, therefore, be noted that the pressure of the spring tending to rotatethe shell of the roller acting through the holding pawl retains the free pawl against rattling. This is particularly desirable in curtain rollers which are to be used on automobiles.

In 5 I have shown a'slight modification in which the free end .of the curved projection 22 does not press against the side of the short projection on the other pawl but, the side 27 of this projection presses against a short projection 23 on the other pawl tending to turn it about its pivot 18 into contact with the flange 24 in the same manner as that disclosed in Fig. 4.

In Fig. 6 the short projection 28, corre sponding to short projections 23' and 23 in Figs. 4 and 5, is located on theopposite side of the pivot 18 and the long curved projection 22 contacts with aside of this lug to turn the free pawl counterclockwise or inwardly toward the stationary element and torest thereagainst. The efiect, however, is

the same as in the other two forms, as under the action of the spring 20 through the holding pawl the free pawl is pressed against the three points of support and prevented from rattling.

It will be noted, from an inspection of the drawing, that the device is very simple in construction and that there is no change necessary in the roller itself to accomplish the desired result of preventing rattling of the loose pawl, the change being in the pawls themselves. It will also be apparent that the pawls may be very freely pivoted on their pivots 18 so that they are free to turn in the rotation of the element 11, but that when the lug 21 in one of them is in the recess 16 of the stationary element to prevent turning of the element 11 the free pawl is positively prevented from rattling.

Having thus set forth the nature of my invention, what I claim is:

1. A curtain roller comprising rotary and stationary elements, means tending to turn the rotary element, a pair of pawls carried by the rotary element, said pawls and stationary element being provided with shoulders adapted to coact to prevent turning of the rotary element in one direction, and means operated by the holding pawl acting on the free pawl to prevent its rattling.

2. A curtain roller comprising stationary and rotary elements, means tending to rotate the rotary element, a pair of pawlspivoted to the rotary element, the pawls and sta tionary element being provided with shoulders adapted to coact to hold the rotary element against turning in one direction, and means carried by the pawls adapted when one pawl is in holding position to engage the other pawl and hold it against rattling.

3. A curtain roller comprising stationary and rotary elements, means tending to rotate the rotary element, a pair of pawls plvoted to the rotary element, said stationary element being provided with a recess, lugs on the pawls adapted to enter said recess, and means on the pawls adapted when a pawl is in holding position to retain the other pawl against rattling.

4:. A curtain roller comprising stationary and rotary elements, means tending to rotate the rotary element, a pair of pawls pivoted to the stationary element, said stationary element being provided with a recess, lugs on the pawls adapted to enter the recess to prevent turning of the rotary element in one direction, and a projection on eachpawl adapted when a pawl is in holding position to press against the free pawl and hold it against rattling.

5. A curtaln roller comprising stationary and rotary elements, means tending to rotate the rotary element, a pair of pawls pivoted to the rotary element, coacting means on the pawls and stationary element to hold the rotary element against rotation in one direction, and means operated, by the rotating means to hold the free pawl against rattling.

6. A curtain roller comprising stationary and rotary elements, means tending to rotate the rotary element, a pair of pawls pivoted to the rotary element, the pawls and stationary element being provided with shoulders adapted to coact to hold the rotary element against turning in one direction, projections on the pawls on opposite sides of their pivots, the projectionof one pawl when the pawl is in holding position adapted to contact with the opposite projection of the other pawl and tend to turnit on its pivot.

7. A curtain roller comprising rotary and stationary elements, means tending to rotate the rotary element in one direction, a plurality of separate relatively movable pawls carried by the rotary element and provided with shoulders, said stationary element being provided with a shoulder adapted to coact with the shoulder on any of the pawls to prevent turning of the element under the action of said means, and means carried by each pawl adapted when the pawl is in holding position to engage the acent free pawl and retain the same stationary to prevent rattling thereof. I

8. A curtain roller comprising rotary and stationary elements, means tending to rotate the rotary element in one direction, a pair of pawls pivoted to the rotary element and each provided with a shoulder, said stationa'ry element being provided with a shoulder adapted to engage the shoulder on either of the pawls to retain the rotary element against turning in the opposite direction, and a projection carried by each pawl adapted when the pawl is in holding position to be pressed against the free pawl under the action of the turning means to hold the free pawl stationary and prevent rattling thereof.

9. A curtain roller comprising rotary and stationary elements, means tending to rotate the rotary element in one direction, and a pair of separate relatively movable pangs carried by one of said elements, said paw s and the other element being provided with coacting means to hold the rotary element against rotation under the action of said first mentioned means, each pawl being adapted when in holding position to transfer pressure under action of the element rotating means to the other pawl and hold it against rattling.

In testimony whereof I afiix my signature.

FRANKLIN H. HART.

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