US752096A - Window-shade roller - Google Patents

Description

Patented February 16, 1904.

PATENT OFFICE.

RUDOLPH Z. NOLAN, OF AL'ION, ILLINOIS.

WINDOW-SHADE ROLLER.

SPECIFICATION forming part of Letters Patent N o. 752,096, dated February 16, 1904.

Application filed J une 24, 1903.

To all whom t may concern:

Be it known that I, RUDOLPH Z. NOLAN, a citizen of the United States, residing at Alton, in the county of Madison and State of Illinois, have invented new and useful Improvements in Window-Shade Rollers, of which the following is a specification. Y

My invention has relation to new and use- Eul improvements in window-shade rollers of Qhat type which include in their structure a spring for rotating the roller to wind the shade 5hereon and a pawl-and-ratchet device for iolding the roller against return movement when the curtain is lowered.

The object of the invention is to provide a levice of the character mentioned which is imple in construction and durable and eiiicient n use and which will embody in its structure m improved pawl-and-ratchet device.

The invention consists in providing one end )f the roller with a ratchet-disk which is rigdly attached to and turns with the roller when ihe shade is raised and lowered and in mountng upon the roller-spindle a locking member yhrough which the disk turns and in which is ocated a ball which by gravity engages the lisk to prevent rotation of the roller.

I have fully illustrated my invention in the ..ccompanying drawings, forming a part of this peciication, wherein- Figure 1 is a perspective view of one end of shade-roller, showing my invention applied n operative position thereon. Fig. 2 is an ind view of my improved roller, 'the tubular asing being shown in longitudinal section and he ratchet-disk in end elevation. Fig. 3 is a` ongitudinal section through the end of the oller and my invention as applied thereto. Pig. 4: is a sectional view on the line 44 of Fig. 2.

Referring to the drawings, 1 designates a .ollow shade-roller within which is arranged spring (not shown) which is adapted to turn he roller in one direction for'the purpose of vinding thek shade thereon in a well-known ianner. Secured upon the end of the roller s a socket or cap-piece 2, having a closed end ormed with a central circular opening 3, hrough which the spindle f1 extends, said spin- Serial No. 162,946. (N0 model.)

at right angles to the face of the socket or cappiece is a cylindrical extension or neck 6, the end of which terminates a short distance beyond the cap-piece and is formed or provided with a disk 7 which -is formed upon its periphery with a plurality of projections 8, the rear sides of which are curved, as at 9, the front portions being curved inwardly, as at 10, to provide pockets or recesses for the purpose hereinafter specified.

11 designates a locking member which is rigidly mounted upon the spindle 4i and is secured thereon in an inclined position, as shown in Fig. 1, by forming it with a longitudinallyextending central aperture through which the spindle fi is projected. This locking member 11 is provided with a longitudinally-extending slot 12, within which the ratchet-disk 7 is located and turns when the roller is rotated, said member being cut away at one side, as at 13, to provide for the free rotation of the cylindrical extension 6., At its upper portion this locking member 11 is hollowed out to provide a longitudinally-extending channel or raceway 141, in which is located a ball 15, which v is of such a diameter as .to travel easily within the raceway, but too large to permit of its being displaced through the slot 12, as shown in Fig. 3. VThis ball is adapted by its own weight to fall into recesses 10 in the ratchet-disk in order to prevent the rotation of the roller 1 to wind the shade thereon.

y It will be seen .that the position of the disk `and locking member-in operative relation is insured under all conditions in view of the fact that the locking member is rigidly mounted on the spindle and that thebody thereof adjacent the cut-away portion 13 extends well within the periphery of the disk, whereby lateral and longitudinal displacement of the disk is prevented.

'Io provide for the insertion of the ball into its position in the locking member, the upper end of said member is provided with an opening 16, through which the ball is inserted, the opening being afterward sealed by means of a plug of solder or in any other desired manner. y

The operation of the invention is as follows: When the shade is pulled down, the disk 7 will be rotated in a direction such that the ball 15 will ride over the curved portions 9 of the ratchet-disk and will thereby be forced up into the raceway, the free rotation of the roller in the direction to lower the shade being unimpeded. As soon as the shade is lowered to the desired point the ball 15 will roll down the raceway into one of the recesses 10, whereby the rotation of the roller in the opposite direction to wind the shade up will be prevented. To raise the shade, it is pulled downwardly, so as to rotate the roller ashort distance, which will serve to force the ball out of engagement with the disk up into the raceway. rIhe spring within the roller will then exert its force to rotate the roller in the Opposite direction, the ball being thrown out of engagement with the disk and being held out oi' engagement therewith during the rotation of the disk. When the rotation 0f the roller is stopped, the ball will then roll into engagement with the disk and further rota tion of the roller prevented.

It will be seen that I have provided a pawland-ratchet device which is extremely simple in construction and which will efciently attain the objects for which it is' devised.

Having thus fully described the invention, what is claimed as new is f 1. The combination with a shade-roller and its spindle, of a cap-piece provided with a ratchet-disk,having a central aperture through which the spindle extends, a locking member on the spindle, formed with a slot within which the disk rotates and means to engage the disk to prevent its rotation.

2. The combination with a shade-roller and its spindle, of a cap-piece provided with a ratchet-disk having a central aperture through which the spindle extends, a locking member on the spindle formed with a slot within which the disk rotates, a raceway in the locking member and a ball in the raceway adapted tc engage the ratchet-disk to prevent rotation oi the roller. f

In testimony whereof I aiiix my signature ir presence of two witnesses.

RUDOLPH Z. NOLAN.

Witnesses:

J. C. FAULsTIoH, H. AsHLooK.

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