US2570140A

US2570140A - Head assembly for spring shade rollers

Info

Publication number: US2570140A
Application number: US185404A
Authority: US
Inventors: Jr Joseph T Mayer
Original assignee: Stewart Hartshorn Co
Current assignee: Stewart Hartshorn Co
Priority date: 1950-09-18
Filing date: 1950-09-18
Publication date: 1951-10-02
Anticipated expiration: 1968-10-02

Description

octi- 1951 .1. T. MAYER, JR 0 I HEAD ASSEMBLY FOR SPRING SHADE ROLLERS FiledSept. 1a, 1950 v +3- 44 4 a [06 F/ G.

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1 HI! I! //7 van far Joseph TMQ/Q'c/K Patented Oct. 2, 1951 UNITED STATES PATENT OFFICE HEAD ASSEMBLY FOR SPRING SHADE- ROLLERS Joseph T. Mayer, Jr., Muskegon, Mich., assignor to Stewart Hartshorn Company, New York, N. Y., a corporation of New Jersey Application September 18, 1950, Serial No. 185,404

3 Claims.

easily and quickly.

The invention will be understood from the following description of the present preferred embodiment thereof, taken in connection with the accompanying drawing, in which:

Fig. 1 is a fragmentary, broken sectional elevation, on an enlarged scale, of a shade roller and the spring mechanism which is mounted in an end thereof;

Fig. 2 is an exploded view, on a smaller scale than Fig. 1, showing in perspective the various elements of the mechanism; and

Fig. 3 is an end elevation, on the same scale as Fig. 1 taken on the line 33 of Fig. 1.

Referring to the drawing, the roller or barrel 4, which is usually but not necessarily made of wood, is shown as provided at one end with an axial cavity 6 adapted to receive the coil spring 8 which surrounds the spindle or stick [0. As is customary, the inner end l2 of the spring 8 extends transversely of the coil and is adapted to enter a slot l4 in the end of the spindle Hi. The other end of the spindle I is preferably axially drilled for a short distance and provided with a metal ferrule 16 having in its end a rectangular opening I 8 adapted to receive the spear 20, the pointed end of which is driven into the end of the spindle during assembly, and secured therein by a pin 22, which is driven through the spindle I0 and through a hole 24 in the spear.

The spear is provided with a shouldered portion 25 on which is mounted a hub 26 which may be secured to the spear by staking the corners 28. Hub 26 has a cylindrical portion 29 and a flange 30 in which are two diametrically opposed notches 3|, the sides of which extend radially and are spaced apart by about 60 of arc.

As is well understood in the art, the shade roller is so installed that the flat end of the spear 20 is secured against rotation and this maintains the hub 26 and the spindle I 0 stationary while the roller revolves about them.

Mounted against the end of the roller 4 is a member herein termed the "cup 34 which is a solid molded body which may, for example, be formed by pressing in a mold and sintering powdered metal in accordance with well known procedures. The cup has a cylindrical skirt 2 35 and a larger cylindrical head 36 having a fiat outer face 38, the periphery of which is preferably beveled as shown at 39 to facilitate assembly. The face 38 of head 36 is provided with a pair of slots 40 which are rectangular in cross-section. These two slots lie on opposite sides of and adjacent to a line passing approximately through the center of the cup, as best shown in Fig. 3, and open into a cylindrical depression 4| in the center of the cup which .is

of sufficient depth to receive the flange 30 of the hub 28. Skirt portion 35 of cup 34 has a cylindrical axial bore 42 which is of sufficient size to freely receive the ferrule 1-6 on the end of the spindle [0. i Connecting depression 4| and bore 42 is a smaller bearing hole 43. The skirt 35 encloses the end of spindle in and prevents any of the outer end coils of spring 8 from jamming between the spindle and the cup when the spring is wound very tight. As shown in Fig. l, the rear face of the head 36 of the cup may have one or more small projections 44 intended to bite into the wood or other material of the roller to secure the cup and roller against relative rotation. The cup is provided with a third slot 45 extending across the face 38 and through the edge of the head 36 as best seen in Fig. 2. This slot receives the end of the coil spring 8 which is preformed as shown in Fig. 2 to snap into the slot 44.

Freely sliding in the slots 40 are a pair ofdogs or pawls 46 having beveled inner faces 48. After assembly of the device, these dogs are held in their slots by the sheet metal shell 50, the cylindrical wall 5| of which surrounds the endof the roller and the cup and the flat inwardly extending flange 52 of which abuts the face 38 of the cup. The ferrule is held in place on the roller by crimping or rolling in its rear edge as shown at 54 and this holds the entire assembly together.

To assemble the parts above described, the hub 26. is first staked to the spear 20 and this sub-assembly is positioned in the depression 4| of the cup. The spindle [0 with its ferrule l6 attached is then assembled to the spear and secured by the pin 22. The spring 8 is positioned over the spindle with-its end l2 in the slot l4 thereof and the preformed bent end 8a of the spring is then snapped into the slot 45. This assembly is then positioned in the open end; of the roller, and while in upright position, the dogs 46, are dropped into the slots 44 with their longer sides directed toward the center of the spear 20,

as shown in Fig. 3 and the shell is slipped over the end of the roller, pressed down and crimped in place. The angle of the beveled faces 48 of the do s is such that these faces will override the corners of the notches 3| in the hub when the roller rotates. As will be understood from Fig. 3, the roller is mounted with the spear in approximately upright position so that one of the notches; 3;! is at the top. Gravity willthus cause one of the dogs 46 to fall into the notch 3|, and if the roller is rotated slowly, one edge of the notch will engage the dog and lock the roller against rotation. However, if the roller is moved rapidly, centrifugal force will throw both dogs outwardly so that they will not en age the notches 3| regardless of the direction of rotation.

Hub 26 may be economically manufactured from pressed metal powder like the cup 34 and either or both of these members may be impregnated with lubricant which remains in the poresmade of wood or other compressible material,

this portion of the spring is pressed into the roller when the parts are assembled, serving to lock the cup 34. against rotation relative to the roller. On smaller size rollers arrying light weight shades, this locking force may be sufiicient so that the projections 44 on the rear face of the cup may be dispensed with.

It. will thus be seen that the, invention provides a shade roller structure having a minimum of parts which are cheap to manufacture'and easy to assembleand which is capable of operating for long periods without attention. Both the dogs 46'and the end 8a of the spring 8 are held in their respective slots in the cup 34 by the shell 50 which is secured thereover.

It is to be understood that the foregoing detailed description is to be construed merely as illustrative and not as a limitation of the invention which is pointed out in the appended claims.

What is claimed is:

1. A head assembly or a springshade roller of the typ ha n a. h l ow end containi a helical spring secured at its inner end to a spindle located axially in the roller, said assembly comprising a solid molded cup member having'a ylindr cal head of abou th same dia t r as the roller and having a flat outer face, a, cylindrical shell having an inwardly extending flange adapted to lie flat against said face, said cup member having an axial bore and a depression inits face portion of greater diameter than and and the beveled faces being of greater depth than the notches in said hub flange and adapted to override the corners of said notches, and a spear extending through the hub into the spindle and secured therein, said shell being fastened to the roller to hold the assembly in place thereon.

2. A head assembly for a. springshade roller of the type having a hollow end containing a helical spring secured at its inner end to a spindle located axially in the roller, said assembly comprising a solid molded cup member having a cylindrical head of about the same diameter as the roller and having a flat outer face, a cylindrical shell having an inwardly extending flange inner corners of the dogs being adjacent said line adapted to lie flat against said face, said cup member having an axial bore and a depression in its face portion of greater diameter than and 7 opening into said bore, a hub adapted to form a bearing in said bore and having a notched flange rotatable in said depression, said cup member having a pair of inwardlydirected slots in its face in alinement with said notched flange, a pair of dogs freely slidable in said slots and having oppositely directed beveled, inner faces of greater depth than the notches in said hub flange and adapted to override the corners of said notches when the roller rotates, in one direction, and a spear extending through the hub and into the spindle and secured therein, said shell being fastened to the roller to hold the assembly in place thereon.

3. A head assembly for a spring shade roller of the type having a hollow end containing a helical spring secured at its inner end to a spindle located axially in the roller, said assembly comprising a solid molded cup member having a cylindrical head of about the same diameter as the roller and having a fiat outer face, a cylindrical shell having an inwardly extending flange adapted to lie flat against said face, said cup member having 'an axial bore and a depression in its face portion of greater diameter than and opening into said bore, a hub adapted to form a bearing in said bore and having a notched flange rotatable in said depression, said cup member having a pair of inwardly directed slots in its face in alinement with said notched flange, a pair of dogs freely slidable in said slots and having oppositely directed beveled inner faces of greater depth than the notches in said hub flange and adapted to override the corners of said notches when the roller rotates in one direction, the cylindrical head of said cup having an additional slot extending through its outer, edge and across its outer face, the adjacent end of said spring being bent and hooked over said head and lying in said slot, and a spear extending through the hub and into the spindle and secured therein, said shell being fastened to the roller to hold the assembly in place thereon and secure the spring end to the cup member.

J S H T- M Y R, JR.-

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,344,358 Simpson June 22, 1920 1,855,496 Streicher Apr. 26, 1932