Патент USA US2128489код для вставки
Aug. 30, 1938. 2,128,489 A. LANG WINDOW SCREEN Filed April 18, 1956 . F. M1. H INVENTOR. ‘ ' ATTORNEY Patented Aug. 30, 1938 ' 2,128,489‘ UNITED STATES PATENT OFFICE . 2,128,489 wmnow some»: I Albert Lang, Berkeley, (lalif. Application April 1a, 1936, Serial No. 15,133 'lClalms. (Cl. 156-14) are required to complete the screen, the cost thereof in both labor and materials is greatly reduced. The present invention relates to window screens and more particularly to an improvement in metallic screens of the type having a channel with a screen fabric retaining means disposed therein to secure the screen fabric upon the frame. I An object of the invention is to provide‘a new and novel metallic frame for window screens which may be formed from a single strip of metal ' with but one joint therein. Another object of the invention is to'provide a metallic window screen of light construction having inherent screen tension retaining means. Another object of the invention is to provide a new and novel form of means for making a joint in metallic screens of the type having a screen fabric retaining channel and a wedging means extending around one side thereof. A further object of the invention is to provide :1) a new and novel form of screen securing means For a better understanding of the invention reference should be had to the accompanying a drawing, wherein there is shown by way] of illus tration and not of limitation, preferred embodi ments thereof. ' ' In the drawing; Figure‘ 1 is a fragmentary front view taken at 10 the comer of a window screen showing the con struction thereof, Figure 2 is a fragmentary view of the back of a screen, also taken at a corner, showing the posi- - tion of the screen retaining means and the man ner of mitre cutting the frame forming strip for the corner bend, ‘ I . Figures 3 and 4 are fragmentary perspective views showing an improved means for securing together the abutting ends of a finished screen for a screen frame of the type having a screen frame, fabric receiving channel extending around one side thereof. In the prior art there are a number of examples ing a screen constructed in accordance with the present‘ invention secured upon the sash of- a of metallic screen frames which are formed by folding a strip of metal to provide a channel along one side thereof into which the screen fabric and a screen retaining rod may be dis posed. Examples of this construction are shown 30 in William J Baker Patent No. 1,004,721, dated October 3, 1911; Clifford Traut Patent No. 1,18'7,402, dated June 13, 1916; and Henry Higgin Patent No. 1,248,858, dated December 4, 1917. In each of these patents the frames are formed by cutting the .frame forming strips into four pieces and joining the corners by welding or other means. As disclosed in each of the above patents it is also necessary with the construction illustrated to provide a right angle reinforcing corner piece.. 'As distinguished'from the constructions illus 40 trated in the above cited patents, the present invention provides a screen which can be formed with'a continuous channel extending‘ there -) 4 around from a continuous strip of metal with but one joint in the completed frame. The pres ent invention also embodies the further novel ' feature of a .screen securing rod which, in addi tion to securing the screen fabric upon the frame, .also imparts improved screen tensioning charac teristics-into the completed screen‘ frame. This makes possible the formation of a screen frame of light construction which can be made of greater dimensions than has heretofore been possible with a screen of this character, and at the same time, 55 since a minimum of parts and assembly operations . I Figure 5 is av fragmentary sectional view show 25 metal casement window, and Figures 6, 7, 8, 9 and 10 show various forms of the improved screen securing and tensioning means contemplated by this invention. As is clearly shown in Figures 1 and 2 of the drawing, the screen constructed in accordance 30 with the present invention comprises a sheet metal frame member I0 upon which a screen fabric II is secured by means of a-securing rod I2. The securing rod i2 is preferably of one con tinuous piece with right angle bends at its cor ners. 35 This rod I! may consist of a number of separate rods providing the separate pieces in clude a substantially right angle bend which ex tends around each corner of the frame 10. The frame Ill is formed by folding a metal strip of 40 cold drawn steel along its longitudinal axis so as to provide a channel in one side thereof. This channel, designated by the numeral i3, in Figure 2 of the drawing, is of a width and depth su?i cient to accommodate the edge of the screen fabric II and the securing rod l2. The channel I3 is formed by folding the frame forming strip so that it will have an inside ?ange l4 and an - outside ?ange I 5. For stiffness, the frame l0 also has an outwardly extending flange l6 which is adapted to engage the surface upon which the screen is to be secured. In forming the frame ill the metal strip will be ?rst folded in the above manner as a continuous piece and subsequently four mitre cuts I‘! will be made therein by any 55 2,128,489 suitable means. These mitre cuts will extend through the inside ?ange It and the bottom 'portion of the channel I3 at the desired points to the frame it between its corners and exert an outward force upon the frame which will coun teract any inward pull or tension that is imparted form the corners of the frame III. In connection to the screen fabric by a stretching thereof during with each mitre cut i1 it is to be noted that the the assembly operation. This latter feature of > ?ange l5 and the ?ange it of the screen frame I the invention may be applied to the screen frame iii are left intact for bending and consequently in a number of different forms and will now be no welding or other form of joint is required at described in connection with the remaining ?g the corner of the screen frame, as is the case in all prior art metal screens. After the frame forming strip has been folded longitudinally and provided with the four mitre cuts I‘I corresponding in location to the corners of the screen and ?nally bent up into rectangu 15 lar form, it will provide a frame having a con tinuous channel l3 extending entirely around one ures of the drawing. . . Broadly, the novelty of thisimproved screen 10 securing means, in conjunction with the rela tively light frame i0, consists in bowing the ' screen fabric retaining rod I! so that it will pos sess an inherent outward bias when assembled in the frame l2 and thus exert a force upon the 15 frame Hi which will maintain the screen fabric taut between the corners of the frame and at the side thereof into which the securing means or rod l2 may be pressed over the edges of the screen same time reinforce the frame at these points fabric ll. After the screen frame ID has been and at the corners. 20 formed, and before the screen fabric l I is applied - thereto, it is desirable to secure together the meeting ends of the frame forming strip where they meet between two of the corners. This can be accomplished in a number of ways. For ex 25 ample, the ends of the frame forming strip may be butt-welded. In Figures 3 and 4 of the drawing. there is shown in detail an improved form of securing means for the abutting ends of the frame form 30 ing strip. As here illustrated, the abutting ends ' of the frame it are held in alignment and se cured together by means of a- clip l8 which ex tends around the outside of the channel i3 formed in the frame It. This clip I8 has an out As shown in Figure 6 of the drawing, the screen 20 retaining rod I2 is shown as formed of a‘ single piece of metal and with four substantially right angle bends therein at properly located points. Between these right angle bends the rod I2 is provided with a slight outward bowing so that 25 when released the rod will take substantially the position illustrated in this ?gure of the drawing. With the rod formed in this manner, it will be seen that when it is squared by being placed into the channel I3 of a corresponding frame, the 30 sides thereof will have an inherent outward bias which will impart a corresponding stiffness to the frame Ill between its corners. In Figure 7' of the drawing, the securing rod is 35 wardly extending ?ange l9 which provides rigid ' ?rst formed as last above described, and then ity and it is secured upon the screen frame by squared and butt-welded at the meeting ends 26 35 a crimping 20' in the opposed sides thereof. This crimping 20 extends into the side ?anges it and if» of the channel I3. The crimping 20 is ac 40 complished by placing a suitable die within the channel l3 and applying pressure through suit able punches to the opposite outside surfaces of the clip i8. After the clip i8 has been thus se cured upon a ?nished frame, the screen fabric 45 H can be placed thereupon with its edges extend ing over the channel l3 and secured in place by pressing the securing rod l2 into the channel I3 over the edges of the screen fabric. In Figure 5 of the drawing, there is shown a 50 casement window frame 2| having an outswing: of the rod 12, before it is inserted into its cooper ating frame III. In Figure 8 of the drawing, there is shown a securing rod construction which is particularly adapted to long narrow screens. As here shown, the rod is formed with long sides 21 bowed out wardly and the portions thereof corresponding to the ends of the frame are left straight. This pro vides a securing rod which will impart the addi tional stiffness required along the long dimension 4,5 of the screen. In Figure 9 of the drawing, there is shown a modi?cation of the last described arrangement, wherein two separate rods 28 and 29 are used. In this embodiment the ends of the rods 28 and 50 ing sash 22 of the type to which the screen here in described is particularly applicable. As here 29 extend lengthwise of the screen frame and are shown, the ?ange l6 of the screen frame It rests normally disposed at a slight outward angle so upon the'?ange surface of the casement frame ' that when they are pressed into the rectangular frame channel IS, the ends thereof will exert an 55 2 l , and is there held by suitable clips. These clips may take a number of forms. As shown, they outward force which will compensate for and 55 consist of two spaced upwardly extending clips counteract any inward force exerted upon the 23 behind which the bottom of the frame it! is side of the frame It by the screen fabric ‘I I, and adapted to restyand at the top of the screen as a result the screen .fabric will be held taut 60 there is a single centrally located clip 24 which throughout the length of the screen after it has been secured upon the frame II. In Figure 10 of the drawing, there is showna is secured upon the casement frame 2! by means of a thumbscrew 25 so that it may be released and rotated to permit removal and placement of the screen over the window opening. A comparison of the screen construction de 65 scribed and illustrated by this application with the constructions illustrated by the above identi ?ed prior art. will show that the frame of the present invention is considerably lighter than 70 any heretofore proposed and therefore in order to provide against an inward bowing of the frame l0 between its corners, by reason of any pull ex erted thereupon by the screen fabric, the present invention also contemplates a specially formed 75 screen fabric securing rod I! which will reinforce further modi?cation of the latter arrangement, wherein the securing rod is formed of four sepa rate members 30, each of which extends around one of the corners of the screen frame II. The ends of the securing members 30 are normally disposed at an outwardly extending angle slighty greater than 90 degrees, so that when they are pressed into the right angle channel upon the 70 frame l0, they will exert an outward force upon the screen frame Ill intermediate its corners and counteract any frame collapsing .force which ' might be exerted upon the frame by the screen fabric. ' 3 2,128,489 While I hav , for the sake of clearness and in order to disclose the invention so that the same can be readily understood, described and illus trated speci?c devices and arrangements, I de 4. In a metallic screen, the combination of a sheet metal frame of rectangular outline having a continuous groove formed in one side thereof, a screen fabric disposed upon said frame with its edges extending into said groove, and a con sire to have it understood that this invention is rod bent to normally conform to the not limited to the speci?c means disclosed, but tinuous groove in said frame and pressed into said groove may be embodied in other ways that will suggest over the edges of. said screen for securing the themselves to persons skilled in the art. , It is believed that this invention is new and it is de 10 sired to claim it so that all such changes as come within the scope of the appended claims are to be considered as part of this invention. Having thus described my invention, what I claim and desire to secure by Letters Patent is: 1. A metallic frame for window screens, com 15 prising a ribbon-like strip of metal folded lon gitudinally to form a. groove of rectangular cross section along one side thereof, said frame hav ing corners formed by cutting a mitre through 20 said groove by cutting only the bottom and the inner groove forming side of said strip and bend ing the uncut portion of said strip at the other wall of the groove at a right angle parallel to the plane of said groove, said strip having four 25 mitre cuts and right angle bends formed inter mediate its ends and having its ends abutting between two of the corners to form the frame, and a channel-like clip telescoping over the abutting ends of the strip having its side walls 30 crimped into the outsides of the groove formed in the frame. ‘ 2. In a metallic screen, the combination of a sheet metal frame of rectangular outline having a continuous groove formed in one side thereof, a screen fabric disposed upon said frame with its edges extending into said groove, and a wedging vmeans pressed into said groove over the edges of said screen for securing the screen upon said frame, said means having portions correspond 40 ing to the ends and sides of the screen bent outwardly and producing an inherent outward bias in said frame to compensate for the ten sion exerted upon said frame between its corners by the screen. 3. In a metallic screen, the combination of a sheet metal frame of rectangular outline having a continuous groove formed in one side thereof, a screen fabric disposed upon saidframe with its edges extending into said groove, and a wedg ing means extending around each corner of the frame and pressed into said groove over the edges. of said screen for securing the screen upon said frame, said wedging means having the portions thereof between the four corners of the frame 55 bent outwardly and producing an inherent out ward bias in said frame and maintaining the screen fabric under tension between the corners of the screen frame. ’ screen upon said frame, said rod having its cor ner forming portions bent at substantially a right angle and its remaining portions bowed outward ly, whereby said" rod will produce an inherent outward bias in the sides of the frame to coun teract the tension exerted by the screen upon said 15 frame between its corners. 5. In a metallic screen, the combination of a sheet metal frame of rectangular outline having a continuous groove formed in one side there of, a screen fabric disposed upon said frame with its edges extending into said groove, and a rec-v tangular ring adapted to conform to the groove in said frame when pressed into said groove over the edges of said screen fabric to secure the ‘screen upon said’ frame, said rectangular ring having the portions thereof corresponding to the sides of said screen bowed outwardly to pro duce an inherent outward bias within the frame and maintain the screen fabric under tension between the sides of said frame. 6. In a metallic screen, the combination of a sheet metal frame of rectangular outline having a substantially channel-like section providing a groove in one side thereof, the ends of said-frame forming member being brought into abutting re lation between two of the corners of its rectan gular outline, and a channel-like clip secured ex ternally upon the channel-like section of said frame and overlapping the abutting ends of said frame forming member, said clip being secured to the ends of said frame forming member by crimping the sides of said clip into the outside walls of said channel-like section‘ in close prox imity with the bottom of the groove formed thereby. 'I. In a metal window screen of the type hav 45 ing a frame with a continuous, channel into which the edges of a screen fabric are secured, a screen fabric upon said frame, a screen fabric securing means in said channel extending around and reinforcing each corner of the screen frame having portions which exert an outward force upon the screen frame between its corners to counteract the tension of the screen fabric at the sides and ends of said frame. 65 ALBERT LANG.