US1144030A - Automatic roller. - Google Patents

Description

J. B. DRUMM.

AUTOMATIC ROLLER.

APPLICATION FILED JULY 15, 1914.

1 1 $4,03Q. Patented J 11116 22; 1915.

2 SHEETS-SHEET I.

3444) enter- THE NORRIS PETERS $0., PHoTc-LITHO.. WASHINGTON, D4 C,

J. B. DRUMM.

AUTOMATIC ROLLER.

APPLICATHJN man JULY 15. 1914.

Li%%@3@f PatentedJune 1915.

2 SHEETS- H 2.

JOHN B.'DRU1VI1VI, 0F WINSLOW, ARIZONA.

AUTOMATIC ROLLER.

Specification of Letters Patent.

Patented June 22, 1915.

To all whom it may concern: 7

Be it known that 1, JOHN B. DRUMM, a citizen of the United States, residing at Winslow, in the county of Navijo, State of Arizona, have invented certain new and useful Improvements in Automatic Rollers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an automatic roller.

' An object of this invention is to provide a roller of this character by means of which a curtain, awning or the like may be readily operated.

A further object of the invention is to so construct a roller that an awning of considerable length may be evenly rolled.

With these and other objects in view, such as will appear as the description progresses, my invention comprises the combination and arrangement of parts as herein set forth and subsequently claimed.

Referring to the drawing, Figure 1 is a front elevation of my device. Fig. 2 is a plan view thereof. Fig. 3 is an end view. Fig. 1 is a section on line H of Fig. 1. Fig. 5 is a detail section of the rollers, showing the same in looking position.- Fig. 6 is a similar view, showing the pawls in such position as to allow the casing to rotate. Fig. 7 is a section taken at right angles to Fig. 5. Fig. 8 is a detail with a portion of the roller casing removed.

Referring to the drawings wherein like parts are indicated by like characters throughout the several views, my device comprises a base board 1 having at each end thereof a bracket 2 secured thereto by screws 3. In these brackets are formed slots l which are open at their upper ends. Extending between these brackets is a roller 5 having a series of screws 6 thereon by means of which a curtain, awning or the like may be attached thereto. Each end of this roller is internally screw threaded and on each end thereof is secured a drum 7 having a threaded shank 8 which engages into the threads in the adjacent end of the roller 5. Formed integrally with this shank 8 on one of the drums 7 is a disk 9 and extending from the disk 9 is an integral portion 10 of the shank which terminates at its end in an annular casing 11.

An operating cord 12 is wound about the shank portion between the disk 9 and the casing 11. a

Extending through the shank and through the casing 11 is an axle 13 which has a re duced portion 14 and a slot 15 formed longitudinally thereof. The end of the said axle is slotted, as at 16, so that it may be accommodated in the slot 1 of the adjacent brace 2 and prevented from rotation while in such posltlon.

A leaf spring 17 is coiled about and secured to the inner face of the casing 11 and one end of the spring is secured to the enlarged portion of the axle 13. The tendency of the spring is to normally rotate the drum with relation to the axle, but in order that thls rotation may be prevented at times a cover plate 18 having a hole 19 therein through which the axle 13 extends is screwed into the open face of the casing 7. The portion of this plate 18 within the casing has a transversely extending slot 20 therein in which are operable two slidably arranged pawls 21. These pawls are maintained in the slots from transverse displacement by flanges 22. The ends of these pawls have a notch 23 formed on one edge thereof and a cam surface 21 leading fromsaid notch to the other edge thereof so that the tendency of the uppermost pawl when the device is in operative position is to drop into the slot 15 so that the notch in the said pawl engages the slot to hold the casing against rotation. The tendency of the spring 17 is such that when the device is in operation it causes the notches 23 to bind in the slot 15 to lock the casing. It is only necessary, however, to quickly release the pawl from the notch by pulling the curtain or awning down slightly and then allowing the same to be drawn rapidly upwardly by the spring. At this time the pawls are thrown outwardly from the axle 13 by centrifugal force so that as the uppermost pawl passes the slot 15 in the axle 13 it will be out of contact with the face of the axle and thus the notch therein will not contact with the said slot to prevent further rotation of the drum, however, if it is desired to stop the rotary motion of the roller at any point it is only necessary to allow the same to rotate slowly so that the centrifugal force is reduced to allow the uppermost pawl to fall into the slot 15. The drum on the other end of the roller 5 has secured thereto a similar casing, but the disk 9 and the portion 10 on which the rope or chain for operating the device is wrapped are omitted.

Adjacent the operating end of the device in the base 1 is a hole 25 having a metallic collar 26 therein in which is located a pair of anti-friction rollers 27 The operating member 12 passes over these anti-friction rollers 27 and through the base 1 and thence downwardly.

An end section of an awning 28 is secured to each end of the roller 5 in the following manner: A pair of plates 29having holes therein are secured together with the adjacent portion of an awning between the same. The roller 5 extends through these plates and is allowed to have relative rotary movement thereto because of the fact that the holes in the plates are considerably larger than the diameter of the roller.

From the foregoing description it may be seen that I have provided a device which will facilitate the raising or lowering of shades, awning or the like, and I have further provided such a device that the said shades or. awning may be rolled thereon and the. movement of the said roller may be arrested at any desired point, and I have still further provided centrifugally operated pawls for maintaining the roller in its adjusted position or allowing the same to ro= tate as desired.

WVhile I have described a particular embodiment of my invention, I do not wish to be limited to that particular embodiment for it is obvious that numerous changes may be made within the scope of the invention as defined by the claims.

What is claimed is l. A device of the class described comprising an elongated base, a bracket secured to each end thereof and having an upwardly opening slot therein, a roller extending between said brackets, a drum secured to one end of the roller, said drum comprising a threaded shank arranged to' engage screw threads in the roller, a casing on one end of the said shank, a disk secured to the shank between the casing and threaded end thereof, an axle having a slot therein and extending through the shank and easing portion and rotatable therein, the end of said axle being mounted in the slot in the adjacent bracket in such manner that the rotation of the axle will be prevented, a spring connected to the axle and to the casing, a cover for the casing having a slot therein, and pawls freely slidable in said slots and arranged to engage the slot in the axle.

2. In an automatic roller, the combination with a roller member, of a drum secured to one end thereof, a stationary axle extending through the said drum on which it is arranged to rotate, the said drum comprising a casing, a spring secured to the casing and to the axle for rotating the drum in one direction, the said drum further comprising a shank and a flange formed integrally with said shank in spaced relation to the said casing whereby an operating member may be wound upon the shank to cause the rotation of the drum against the action of the spring.

In testimony whereof, I aflix my signature, in the presence of two witnesses.

JOHN B. DRUMM.

Oopiesof this patentmay be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

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