US1792762A

US1792762A - Screen-closure construction

Info

Publication number: US1792762A
Application number: US307206A
Authority: US
Inventors: Byrd C Rockwell
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-09-20
Filing date: 1928-09-20
Publication date: 1931-02-17
Anticipated expiration: 1948-02-17

Description

1931. c. ROCKWELL scmm CLOSURE CONSTRUCTION Filed Sept. 20, 1928 WW 0w 6 m M Q W w E w Patented F eb. 17, 1931 PATENT OFFICE BYRD' c. ROCKWELL, or sHnFFIELn, AIlABAM-A SCREEN-CBOSURE CONSTRUCTION Application filed September 20, 1928. Serial no. 307,206.

This invention relates to new and useful improvements in screen closure construction and to a novel method of manufacturing the screen closure membersand the molding strips therefor. V p The present invention is an improvement upon the construction disclosed in my c'opending application Serial No. 262,388, filed March 17, 1928. g p

In the abovementionedpending application, the inner edges of the frame membersa're ralobe'tedto receive the edges of the screen cloth. The shoulders of the rabloets are so undercut as to continue the'surface of the hottom or of the faceof the rabbfet to which the screen is applied'a suitable distance bey nd saidsh'oulder. This" arrangement eliminates the necessity of trimming the screen to exact dimensions and permits the location of the 29 surplus screen beyond the molding strip. A groove is cut longitudinally in the rabbet at right angles to the plane thereof for enabling the folding of the screen within said groove throughout the entire, length of said rahbet. Thus all pulling strain to which the edge of the screen maybeisubjected, instead of being resisted at spaced points of the screen edge (as is done in the ordinary screen construetion wherein tacks are used tjo'sec ure the sc'reen 30 position) is transmitted to the entire edge of thescreen by virtue of the'factthat the folded portion is disposed in said groove substantially at right angles to the plane of the screen. A- molding strip having a flat bot tom is secured in positioninthe'rabbet and holds the wire cloth therein. W i p The present invention contemplates the use of a molding strip having a-downwa'rdlyprojecting longitudinally disposed rib or tongue which fits intotheggrooveofthe seat orr'abbet and clamps the wire cloth in passion therein. This'not only insures more secure anchoring of the wire clothbut also serves to tension said wire cloth and to hold it taut throughout the entire length of the rabbet. 7

Furthermore, according .to my invention, the molding strip can be made from the frame stock by the same operation, that formsthe rabbetin the latter, thereby eliminating wastage oftheniaterial and elfectin'gsaving of the cost of the stock from which the molding strip has been heretofore made. This molding strip can be given proper contour by the use of appropriate mill cutters during the face cutting operation; p

With these and other objects in view, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully describedand claimed, and

illustrated in the accompanying drawings,- in

Which A Figure 1 shows a cross section of a stock piece from which the frame' is made.

Figure '2 shows the first step of the operation, namely, finishing one edge of said stock to form the tongue of the molding strip.

Figure 3 illustrates the second StBP,1 1 3,Ill' l y, that of cuttinga vertical groove and simin; taneously forming the contour of the molding strip. Figure 4 shows the third step, namely, forming the rabbet and simultaneously severing the molding strip and forming the horizon tal groove in the shoulder'o f the rahbet.

Figure 5 shows the molding strip position in the rabbet with the wire cloth clamped therebetween.

In practicing my present invention, I take a piece of frame stock, such as indicated at 1'0, and trim one edge thereof to provide a longitudinally disposed outwardly projecti i'g tongue or rib 12. This rib is spaced a suitable distance from the upper face of the stock and extends throughout the entire length thereon Theupper face of the stock is then operated upon, preferably by a mill cutter, so as to forma vertically and longitudinally disposed groove 14 and at the'sam'e time provide a proper finish for the upper face of the outer portion 15. The depth of groove 14; is considerablywgreater than the depth of'the proposed rabbet as indicated at 14. By using an appropriate mill cutter,tl'1e upper face of the outer portion 15 can be given the proper contour desired in the finished molding strip.

The edge of the stock piece is now cutlongitudinally throughout its entire length at right angles to the first cut at a point coincident withthe depth of the rahbet, "as indicated at 16. The depth of this cut is greater than the width of the proposed rabbet thereby providing a longitudinally disposed groove 16 which extends under the shoulder 17 and is in the same plane with the face 18 of a rabbet 19, thus formed.

In this manner, the portion 15 is severed from the stock piece 10, thereby forming a molding strip 20 and the rabbet 19. The planes of the faces forming the rabbet are extended inwardly beyond said rabbet.

When the screen is placed in position, groove 16' receives the edge portion of the screen. The molding strip 20, when as sembled on the frame, occupies a position which is displaced a quarter turn relative to the position formerly occupied by said strip when an integral part. of the stock piece, thereby bringing the tongue 12 into the groove 14* as shown in Figure 5. The tongue 12, upon entering groove 14, forces portion of the screen into said groove, as indicated at 21, and clamps said portion in said groove. Thus the screen is properly tensioned and is securely anchored in position on the frame by the interlocking engagement of tongue 12 with groove 14. The molding strip .is then secured in position by nails 22.

Preferably the distance between the tongue 12 and the face of the strip 20, indicated at X, is substantially equal to or less than the distance between the edge of the rabbet and the groove 14" as indicated at Y, so that when strip 20 is placed in position, its outer edge does not project beyond the edge of the rabbet. Similarly the width of the strip, exclusive of the tongue, as indicated at Z, .is substantially equal to, or slightly less than, the height of the depth of the rabbet as indicated at 31, whereby said strip when in position is substantially flush with or slightly below the face of the frame.

The thickness of tongue 14 is less than the width of groove 14; to allow for the wire cloth positioned in the latter and to enable ready assembling of the strip. The tongue and groove anchoring of the wire cloth produces a safe and uniform tensioning of the wire fabric and serves to hold the latter securely in place. In this manner the wire cloth is reinforced as any sudden impacts, to which the wire cloth may be subjected, instead of being resisted at spaced points, as heretofore, are absorbed by the entire length or width of the Wire cloth.

My novel method of manufacturing the frame or stile stock, and the molding strips therefor, utilizes the wood heretofore wasted during rabbeting operations, and eliminates the cost of manufacturing the molding strips, as the latter are made by the same operations which form the rabbets in the stock. Thus, by the use of my method, a great saving is effected in labor and material, enabling the manufacturing of screen closure members in an economical manner.

I am aware that various minor changes could be made in the manufacture of my improved screen closure stock, and I contemplate such changes as fall within the scope of my invention.

I claim:

1. The method of manufacturing screen closure stock consisting in cuttin one edge of a screen stock to form a longitudinally disposed tongue, then grooving longitudinally one face of said stock a suitable distance from the edge thereof, then grooving said edge longitudinally at right angle to the first groove, said grooves intersecting each other, thereby severing a moldin strip and simultaneously forming a rabbet in said stock for receiving said strip, one of said grooves being adapted to receive the tongue of said strip.

2. The method of manufacturing screen closure stock consisting in grooving longitudinally one face of a stock piece a suitable distance from the edge thereof, then grooving said edge longitudinally at right angle to the first groove, said grooves intersecting each other and being of greater depths than the faces of the rabbet, thus formed, thereby providing countersunk grooves for receiving portions of a wire cloth, said rabbet being adapted to receive a molding strip having a longitudinally disposed tongue, one of said grooves being adapted to receive said tongue when said strip occupies position in said rabbet.

3. The method of manufacturing screen closure stock consisting in trimming one edge of a stock to form thereon a longitudinally disposed tongue, then grooving longitudinally one face of said stock a suitable distance from the edge thereof, then grooving said edge longitudinally at right angle to the first groove, said grooves intersecting each other to form a rabbet and the detached portion forminga moulding strip, said grooves being of greater depths than the faces of said rabbet to provide countersunk grooves for receiving portions of a Wire cloth, and placing a molding strip in said rabbet with the longitudinally disposed tongue inserted in one of said grooves thereby clamping said wire cloth in position.

4:. The method of manufacturing screen closure stock consisting in trimming one edge of a stock piece to form a longitudinally disposed tongue spaced a suitable distance from the face thereof, then grooving longitudinally the face of said stock a suitable distance from the edge thereof, and then grooving said edge longitudinally a suitable distance below said tongue and at right angles to the first groove, said grooves intersecting each other thereby severing said tongue portion from said stock and providing a molding ::1

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strip, forming a rabbet in said stock piece, the grooves 'being of greater depths than the faces of said rabbet to form countersunk grooves for receiving portions of a Wire cloth, one of said grooves being adapted to receive the tongue of said molding strip thereby clamping the Wire cloth therein.

5. The method of manufacturing screen closure stock consisting in finishing one edge of a stock piece to provide a longitudinally disposed tongue spaced suitable distances from the faces thereof, then grooving longitudinally one face of said stock and the edge thereof at right angles to each other, said grooves intersecting each other thereby severing said tongue portion from said stock and providing a molding strip for the rabbet thus formed, one of said grooves being adapted to receive the tongue of said molding strip for clamping the Wire cloth therein.

In testimony whereof I hereunto affix my signature this 12th day of September, 1928.

BYRD C. ROCKWELL.