US1778816A - Window shade - Google Patents

Description

w 9 A Y. m 5 U 6 U, 2 M. ema/ m 5. E. SNYDER WINDOW SHADE v 'rnvma Samugl E. S y

I Jr rn V 15 a'stationary spring roller adapted to actuate vent'si'dewise movement and-consequent dis- Patmed W421, 1930 I f v Q 1,778,816.. m

SAMUEL E. SNYDER, or BRooKnYN, NEW YORK wmnow SHADE 7' Application filed A ril 9, 1927. seriarno, is aeeel f-i This invention relates to new and useful spring-roller 8 andits attached shade is oper improvements in window shades and more ably suspended'by athebar 10 which is of particularly to spring-actuated shades and slightly'gr'eater lengththantherollerand has" anobject of the invention is to provide a novel its end extremities angularly bent to [consignv arrangement, whereby a shade of adjustable tute the depending ears llfand 121which jen- .55 3 length may be suspended at any desired'posigage and-bear theroller trunnions 13 and l l.

' tion in relation to the window opening in a Intheear11isproduced an orifice adapted'to manner to facilitate a fine and varied selecrotatably bear the rotatable trunnion 11 tion of light to the room. l 1 whilst in theear 12 is'a'nelongat'ed slot adapt- A further object is to provide a suitable ed to receive the nonrot-atab'le trunnion 14; means, whereby a spring roller and its 'at- Through'eaclrof the trunnions 13 and 14-is tached shade may be operably borne and in produced-an orifice which is adapted toremovable relation to the window opening.v ceive a pin 15 or the like tothe-exterior of-the A still further object is in theprovision of engaging ears 11 and 12 in a manner tq'prethe further spring roller and its attached engagement of the roller 8' and its, attached shade in relation tothe window opening and shade J Y 4 at the same time having sutficient tension not "The shade'6 is suspendedin adjustable greto be effected by the tensioning of the spring lationto'the window ope'ning '5 by thecords 20 in the shade roller, 16 or the likewhich are attached to the eta A yet further object'is in the provision of 'tilonar'y" roller 17in asuitable' mann'erat 18 I the novel winding-cones which coil and unanddepend-therefr'om to 'engage the'eyes 19 'coi-l the flexible connections fromthev shadewhich project from theshade-bearing bar 101 roller device in a manner to equalize the lever- The stationary springroller'17 isrotatably, 5 age upon the roller in relation to the spring borne by the common bracketsQO' which are; tension of the roller. j provided with ears 21'adaptedto receive the Another object of this invention is in the rotatable trunnion-22 and'non rotatabletrun provision of a shade of the character denion 23 in co mmon form. Mounted uponscribed which is simple in construction, inex each end extremityof the roller 17 isa mem pensive to manufacture in consideration of ber 24'havingthe form of a frustum of acone,

' the advantages offered; efiicie nt and durable hereafter termed cone, whichjcones have spi- 45 nate the corresponding parts:

in service; positive in action and a general ralgroovesor-threads 25 produced'initheir improvement in the art. exterior surface and ada'ptedt'o ce i1-;,or 'un- Other objects andmany of the attendant coil the cords 16jin even, spacedturn in'opv 35 advantages will be readily appreciated-as the" oration. Each-of-these'cones 24 isalso proinvention becomes better understood from a videdwith an integral, annular flange 25;

consideration of the illustrative embodiment which is preferably of dimensions equal to v a of the same and for which pur'posesuch dethe largest diameter of the coneand adapted I scriptive drawing hasbeenhereto appended, to prevent over-winding of the cords16 into 0 wherein H the trunnions and vconsequent jam. g

The single view is an elevation of a window: The cord 26 is securedto the eye 27 of the l ,7 with the invention attached; r bar 10 in a manner to facilitate adjustment of,

Referring more in detail to the drawing theshade mechanism-6 in relation to the win- I in which similar reference numerals desigdow-opening 5,'whilst the cord 28 is secured I V to the eye 29 of the fillerstick30 at thefree 95.}

It will be seen that the window 5 is nor-1 end of the shade material 7 in amanner to ad mally covered by the shade 6 produced of just the shade over the desired spaceof the c suitable, tractable material '7 attached to the window,v V '7 1 r I spring'roller 8 in a manner to'normally wind With this novel arra thereon by the tension of the spring. The

ngement, it is obvious any desiredportion of'the window opening lQDj .l 1

5 may be covered, and that when the shade 6 is at the top of the window opening 5 and the tension spring of roller 17 is 1n relatively unwound condition, the cords 16 are 5 then engaging the cones 23 at their smaller diameter and nearer the axis of the roller. Therefore, the leverage is relatively less in proportion to the strength of the spring. Again, when the shade 6 is at the bottom of jthe window opening and the tension spring of roller-17 is in re1ative1-y'woundup condi tion, then the cords 16 are engaging the cones 23 at their larger diameter and further from the axis of the roller,: and the leverage is, greater in proportionate relationv to the strength of the spring. Accordinglyby this novel cone arrangement, the leverage is equalized in proportion to the'variationof the spring tension of roller 17. r

i It will be obvious from the foregoing description, that this invention is a great improvement in window shades and whilst the preferred: embodiments have been disclosed,

yet it is to be understood that minor details 25 inthe construction, combination and arrangement of the cooperating elements may be re- 7 sorted to within the scope of whatisclaimed without departing fromthe spirit of the invention. r

.What 1 claim is: r

The combination witha window shade consisting of a spring roller and shade attached thereto, of'a longitudinal bar having an'gu-i larlybent ends adapted to operably support 5 said spring roller, a second spring roller revolubly nounted' at the top of the window opening, conical sectionsattached to the ends 'ofsaidsecond spring roller each havinga spiral groove on its outer surface, cords susi i pending the endsof said barfrom said conical sections, said cords having their uppermost ends .1 connected to the largestends of said conical sections whereby the leverage 7 upon thesecond spring roller is equalized in .3 proportion to the tension of the springthere,

ofwhen in operation and flanges at the small a ends of "saidconical sections to prevent overwinding'of said cords. 1

In testimony whereof I aifix my signature.

5o .1 sAM ELn-sN DER.

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