US1235735A - Screen. - Google Patents

Description

Patented Aug. 7, 1917.

1.1. STEFFAN & C. G. SCILLIGO.

SCREEN. APPLICATION FILED MAY|7.1915.

UNITED sr sri;

JOSEPH J'. STEFFAN AND CORNELIUS Gr. SCILLIGO, OF ST. LOUIS, MISSOURI.

SCREEN.

Specification of Letters Patent.

4Patented Aug. 7, 1917.

Application led May 17, 1915. Serial No. 28,564.

provements in Screens, of which the following is a full, clear, and eXact description, reference being had to the accompanying drawing, forming a part of this specification. Y

Our invention relates to a screen compris- Aing a frame and a sheet of screen cloth secured to said frame, the main object being to produce a very strong sheet metal screen frame.

The preferred form of the invention comprises frame pieces each'of which is a single sheet of metal folded on itself to produce two metallic layers, one of which we term a back member and the other a reinforcing formed by folding the two layers of .metal backwardly and inwardly to produce the doubled reinforcing element 6. The inner margin of each frame piece is very materially reinforced by folding the terminals of the folded sheet of metal; andl owing tothe curvature of the metal at the fold the screen cloth B will slide freely over the inner margin of the frame piece when said screen cloth is forced into the channel" 5. The

screen is pulled firmly and stretched slightly while its margins are `being forced into the screen receiving channels V5, and it 1s an advantage to pull the screen over thecurved edge of the doubled reinforcing element 6, instead of pulling it over ak narrowedge on a'sharp corner. j

In applying the screen cloth B to the frame, the margins of the screen cloth are member. The longitudinal margins of the i metal are preferably foldedto reinforce the longitudinal margins of the frame piece, and the reinforcing member is preferably pressed between said margins to produce a longitudinalreinforcing web. By folding, pressing and otherwise bending the metal as will be hereinafter described, we produce a very strong screen frame which is not liable to bend or become distorted by the stresses it receives in service.

Figure I is a fragmentary front elevation, illustrating a corner portion of a screen embodying the featuresy of our invention.

Fig. II is a rear elevation of the structure shown in Fig. I. Y

Fig. III is a detail view of an end portion of one of the frame pieces. y

Fig. IV is an enlarged cross section taken through one of the frame pieces, showing a portion of the screen and the means for securing the screen.

The frame structure comprises sheet metal frame piecesy A, arranged at right angles to each other and connected together at the corners of the screen by means of vrivets 1, or other suitable fastening devices; Each frame piece A is preferably a single piece of sheet metal -folded' on itself to produce a back member 2, a reinforcing member 8, a tubular bead l kat the outerl margin of the frame piece, and a screen receiving channel 5 at therinner margin of 'the frame piece.

The screen receiving Vchannel 5 is preferably position shown in full lines,

forced into the channels 5 by means of retaining strips C. Each retaining strip is preferably a sheet metal clip having a longi- Y' tudinal detent flange 7, .yieldingly fitted to the inner face of the tubular bead l4:, and f having a body portion 8 which extends from said detent flange to Va screen receiving channel 5. The screen cloth -is pulled rmly while the retaining strip is being forced into the screen receiving channel, and thereafter the retainer strip is shifted from the position shown by dottedY lines (Fig. IV) to the l thereby securing the screen to the frame. 'Ihevr'etainin'g member C may be readily removed by releasing its yieldable detent flange 7 from the V tubular bead 4 and then withdrawing 'the inner edge of the retaining member from the screen receiving channel. y

In addition to reinforcing each frame iecey at its longitudinal margins, by means of the bead 4L and double curl 6, we prefer-f ably reinforce the middle portion of the structure bypressing the reinforcing member 3 away from the backv member '2 as shown in Fig. IV. The reinforcing member 3 is preferably bowed atthis point to pro` vide arigid reinforcing web which entends almost entirely acrossthe frame piece.

rIhe back member 2 vis preferably pressed :L i

inwardly, toward the reinforcing member 3,

to produce av kseries of angular ribs 10.l

These ribs 10 lie. between the reinforced margins ofthe frame piece, and they are .referably integrallyconnected together to form a long yzig-zag reinforcing element.

The curledy margins .6 are preferably provided with indentations 12, the metal of the outer curled element being forced into the indentations in the inner curled element so as to securely interlock these elements with each other. The object of interlocking the layers of metal at this point is to positively prevent one layer from slipping on the other. Wlhen a frame piece is subjected to a twisting or torsional strain one of the layers of metal tends to slip on the other', and by preventing such slippage the resistance oered to the torsional strains is very materially increased.

The end portions of each frame piece are preferably formed as shown in Fig. III, the double curl 6, the bead 4 and the reinforcing member 3 being cut away to coincide with the corresponding parts-of another frame piece. 18 designates an L-shaped corner rod linserted into the .tubular beads 4, and

14: is a corner member inserted between the back member 2 and the bowed reinforcing web 3.

15 designates a friction spring secured to a vertical edge of the screen frame and adapted to engage the window casing (not shown) when the screen is in service. One end of the spring 15 is inserted into an opening 16 in the tubular bead fl so as to lie between the angular corner member 13 and the inner face of said tubular bead, the member 13 serving as means for securing the spring to the screen frame. The free end of the spring 15 is adapted 'to slide on ,the vertical edge of the frame piece, and the middle portion of the spring is bowed away from said frame vpiece so as to frictionally engage the window casing.

l/Ve claim 1. A screen having frame pieces each of which comprises a single sheet of metal folded on itself to provide two layers of metal, the inner margins of both layers being turned backwardly and inwardly' to provide a two ply reinforcing element and a screen receiving channel, a sheet of screen cloth fitted to said frame pieces, and means for f forcing the margins of said screen cloth into the screen receiving channels.

`2. A screen having'frame pieces each of -which comprises a sheet metal back member and a sheet metal reinforcing member formed integral with one longitudinal margin and securedto the other longitudinal margin of said back member, said sheet metal reinforcing member 'being separated from said back member at a point between said margins so as to form an intermediate reinforcing web, a sheet of screen cloth fitted to said frame pieces, and retainer strips arranged over the reinforcing members to securethe screen cloth to said frame pieces.

B. A screen having frame pieces each of which comprises a sheet of metal folded on itself to form a back member and a reinforcing web, the outer margin of said sheet of metal being bowed to produce a marginal reinforcing` element, the inner margin being bent to provide a reinforcingelement and a screen receiving channel, and the middle portion of said reinforcing web being bowed from said back member, a sheet of screen cloth fitted to the inner margins of said frame pieces, and retainer members arranged over the bowed portions of the said reinforcing webs and fitted to the marginal portions of said frame pieces to secure the screen in the screen receiving channels.

4l. A screen having frame pieces each of which comprises two layers of metal fitted to each other and folded to produce a double reinforcing element, the folded portions being indented to interlock said layers with each other, a sheet of screen cloth fitted to said frame pieces, and means for securing said screen cloth.

5. A screen having` frame pieces each of which comprises two layers of metal iitted to each other and curled backwardly at their inner margins to provide a screen receiving channel, the curled portions of said metal being indented to interlock them with each other, a sheet of screen cloth, and means for securing said screen cloth in said scr en rcceiving channels.

6. A screen having frame pieces each of which comprises a sheet metal back member bent to form longitudinal reinforcing elements at its longitudinal margins, and pressed inwardly between said marginal reinforcing elements to produce a series of diagonal reinforcingribs, a sheet of screen cloth, and means for securing said screen cloth to said `frame pieces.

7. A screen frame having an opening in one of its side edges, a friction spring having one of its ends arranged in said opening, and a fastening device for securing said end of the spring in said opening, the opposite end portion of said spring lbeing slidably fitted to the outer face of said side edge of the frame, and the middle portion of said spring being bowed away fromsaid frame.

S. A screen frame having a tubular marginal portion, a bow spring fitted to a vertical edge of said tubular marginal portion, one end `of said spring being arranged in said tubular -marginal portion, and a corner member arranged in said tubular marginal portion so as to secure said end of the spring, the opposite end portion of said spring being slidably fitted to the frame and the Ymiddle portion of said Yspring being bowed from the frame.

JOSEPH J. STEFFAN. CORYELIUS G. SCILLIGO.

Gppiesof this patent may be obtained for ye cents each, by addressing the flommilssioner lof Patents,

Washington, D. C.

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