US2797748A

US2797748A - Tension screen

Info

Publication number: US2797748A
Application number: US520479A
Authority: US
Inventors: John T Frydryk
Original assignee: Chicopee Manufacturing Corp
Current assignee: Chicopee Manufacturing Corp
Priority date: 1955-07-07
Filing date: 1955-07-07
Publication date: 1957-07-02
Anticipated expiration: 1974-07-02

Description

J. T. FRYDRYK TENSION SCREEN July 2, 1957 Filed July 7, 1955 2 Sheets-Sheet l INVENTOR.

Joh/7 77 {ydl /i v/ 807% ATTORNEYS.

J. T. FRYDRYK TENSION SCREEN July 2, 1957 2 Sheets-Sheet 2 Filed July '7, 1955 INVENTOR. Jaim TF1/jdr BY d ATTORNEYS.

2,797,748 Patented July 2, l1957 ice TENSION SCREEN John T. Frydryk, Springfield, Mass., assignor to Chicopee hanutfacturing Corporation, a corporation of Massac use ts Application July 7, 1955, Serial No. 520,479

8 Claims. (Cl. 160-328) This invention relates to improvements in means for attaching frameless tension screens to standard window frames. The invention is particularly applicable to tension screens which are xed to the top and bottom portions of a window frame with the side edges of the screen being held against the window frame by the tension induced in the screen material.

A fundamental problem in tension screens is the uniform distribution of tension throughout the screen material and lthe maintenance of the screen material in place against the window frame. This invention provides means for attaching the lower part of the screen material to the window sill so that the screen is held against the window frame under uniform tension. This is accomplished by a novel arrangement of material holding means attached to the bottom of the screen material and adjustable latching means.

It is an object of this invention to provide means for attaching a tension screen to a standard window frame which will maintain contact between the edges of the screen material and the window frame.

It is also an object of this invention to provide latching means for attaching the bottom portion of a tension screen to the window sill of a standard window frame which may be easily assembled.

It is a further object yof this i-nvention to provide latching means for attaching the bottom portion of a tension screen to the window sill of a standard window frame which may be easily assembled.

It is a further object of Ithis invention to provide latching means for a tension screen which may be permanently locked in place maintaining continuous tension upon the screen material.

Further objects and advantages of the invention will be apparent from the following description including the appended drawings of which;

Fig. l is a perspective view partially cut away showing a tension screen in place in `a window frame and holding means therefor;

Fig. 2 is a partial cross sectional View along the lines II-II of Fig. l;

Fig. 3 is a partial cross sectional view along the lines III-III of Fig. l;

Fig. 4 is a perspective view of the cross sectional view of Fig. 3.

Fig. 5 is an exploded perspective view partially cut away showing the lower attaching means of the screen shown in Fig. 1;

Fig. 6 is a perspective View of the sill catch shown in Fig. 5;

Fig. 7 is a partially perspective cross sectional View of a second embodiment of the invention similar to the view shown i-n Fig. 4;

Fig. 8 is a perspective exploded view partially cutaway of the embodiment of the invention shown in Fig. 7.

A tension screen made according to the invention includes ilexible screen material 10;

elongated holding strips

11 and 12 attached to the top and bottom edges of the flexible screen material 10; top bar 15 having a reverse bend forming the groove 26 in which the holding strip 11 is adapted to fit;

top bar hooks

13 and 14 rigidly attached to the top bar 15 and adapted to project outwardly when the screen is in place in a standard window frame;

top hanger brackets

21 and 22 affixed to the top horizontal edge of the window frame 20 adapted to receive the top biar hooks 13 `and 14; roller bar 16 having a slot in the circumference thereof forming the elongated groove 30 in whichV the holding strip 12 is adapted to be fitted;

tension latches

40 and 41 adapted to be fitted to the roller bar 16 and to project inwardly from the screen when it is in place in a window frame; and sill catches 50 and 51 adapted to he aixed to the window sill 23 opposite the tension latches 40 andl 41 respectively and adapted to cooperate therewith to maintain the roller bar 16 ilush against the window sill 23 thereby maintaining the screen material 10 in tension against the window franre 20.

The

tension latches

40 and 41 are identical and are formed as shown in Fig. 5. The curved portion 42 is formed to tit about the circumference of the roller bar 16 and to be clipped. Projecting inwardly from the circular portion 42 is horizontal portion 43 having the anges 44 turned down along each side thereof and havi-ng the cut-out portions 45 adapted to receive the fingers of the sill catch 50. At the inner edge or" the flat portion 43 the vertical portion 46 is formed, and attached thereto by means of the pin 47, is the locking lever 48. The vertical portion 46 is turned along one side to form the flange 49 which acts as a stop for the locking lever 48.

The sill catch 5d is formed with a flat portion 52 and an extended portion 53 projecting at an angle thereto. The fiat portion 52 is formed with the vertical ngers 54 which extend upwards and inward over the at portion 52. The ilat portion 52 and extended portion 53 of the sill catch 50 are formed with holes 55' and 56, respectively, adapted to receive the sill catch screws 57. The bottom faces of the flat portion 52 and the extended portion 53 of the sill catch 50 each have `a pair of projections 58.

The

sill catches

50 and 51 are attached to the wi-ndow sill as illustrated in Figs. 3 and 4. By means of adjustment of the screws 57, the angle between the flat portion 52 and the window sill may be adjusted to adapt the sill catches to various sill depths. This makes it possible for the attaching means to be used satisfactorily with window sills of dierent depths. As illustrated in Fig. 3 the roller bar 16 rests upon the lower edge of the window sill 23. The angle between the flat portion 51 of the sill catch 50 and the window sill 23 is adjusted depending upon the extent to which the roller bar 16 projects above the window sill 23. The tension `latches 4t) and 41 are attached to the roller bar 16 as: shown in Figs. 3 and 4. The length of screen material required may be adjusted by fixing the

tension latches

40 and 41 at any given positions about the circumference of the roller bar 16. A plurality of circumferential holes 24 are provided in which the adjusting screws 25 are inserted through the slots 26 and 27 in each of the tension latches 4t) and 41. Further adjustment may be made at any time by releasing the adjusting screws 25 and rotating the

tension latches

40 and 41 about the roller oar 16 within the limits provided by the slots 26 and 27, thereby enabling the tension latches to be circumferentially adjusted so that the flat portions 43 of the tension latches may be slid between the projecting lingers 54 of the sill catches 50v and 51 respectively.

When the flat portions 43 of the tension latches 40 and 41 are inserted in the

sill catches

50 and 51 respectively, the projecting ngers 54 engage the horizontal portions 43 at the cut-out portions 45. By rotating the locking levers 48 in a clockwise direction the horizontal portions 43 are raised against the ngers 54 locking them in the cut-out portions 45. At the same time the tension latches 40 and 41 tend to rotate about the ngers 54 acting as a fulcrum. The rounded portion 42 of the tension latches and the roller bar 16 are thus lowered and drawn against the window sill 23, placing the screen material in tension. The locking lever locks in position when the point of contact between it and the extended portion 53 of the sill catches is directly beneath the pin 47. The tension latches 40 and 41 are released by rotating the locking levers 4S countereclockwise and pushing them forward to disengage the fingers 54.

An alternate form of the tension latches is shown in Figs. 7 and 8. The tension latch 60 in Fig. S includes the circular portion 62 adapted to tit about the roller bar 16 and a horizontal portion 63 extended rearward from the circular portion 62. The horizontal portion 63 is provided with cut-out portions 65 ladapted to receive the fingers 84 of the sill catch 80. The vertical portion 66 extends upward from the at portion 63 and is formed with forwardly extending projections 69 which are joined by the pin 67. The locking lever 68 is disposed above the dat portion 63 and pivoted about the pin 67. The grip 70 is formed to be compatible with the vertical portion 66. The locking lever 68 projects downward through slot 71 when the grip 70 is pressed forward. When the tension lat-ch is in position in the sill catch as illustrated in Fig. 7 the grip '70 is pressed lforward forcin-g tip 72 of the locking lever 68 against the extended portion 83 of the sill catch S0. The locking lever 63 is pivoted on the pin 67 in such a position that when the lgrip 7i) is pressed forward the forward motion is stopped by the meeting of the rear portion of the tip 72 of the locking lever 68 with the rear portion 'of the slot 71. In this position the point of contact between the extended portion 83 of the sill catch 30 of the locking lever 68 is `beyond the vertical normal line from the sill catch 68 through the pin 67 thereby providing a positive lock retaining the tension latch in place. The tension latch is released by pulling the grip 70 rearward thus releasing the locking lever 68.

By means of this invention there is provided latching means for tension screens which maintain positive locking of the tension screen in place against the window frame. The degree of tension to be effected is easily ladjusted, but cannot change without further adjustment. The locking effect takes place between the locking lever and the sill catch, which parts are remote from the tension screen itself, are easily accessible from the interior of the window frame and do not directly effect the tension screen in the locking operation.

The foregoing `description is submitted `as representative of specific embodiments of the invention and it will be apparent that various equivalents may be employed without departing from the spirit of the invention as defined by the following claims.

Having thus described my invention, l claim:

l. Apparatus for holding a screen under tension in a wind'ow frame comprising separable upper attaching means, bnacket means having a pair of angularly displaced faces and retaining means projecting from one of said faces, a tension latch adjustably affixed to the lower edge of said screen having cut-out portions adapted to receive said retaining means and locking means adapted to force said retaining means into said cut-out portions.

2. Apparatus for retaining the lower portion of a window screen against a window sill comprising a tube in which the lower edge of the screen is retained, tensioning means adjustably affixed to said tube having cut-out portions disposed on the inner side of said screen, bracket means ladjustably aixed to the Window sill having retaining means projecting therefrom adapted to engage said cut-out portions to retain said tensioning means in said bracket means, and locking means attached to said tensioning means adapted to lock said retaining means in said cut-out portions.

3. Apparatus for holding a frameless tension screen in a window frame comprising tubular screen holding means, tensioning means attached to said screen holding means and extending inward of said Window frame, vertically adjustable bracket means attached to said window frame, fulcmm means for retaining said tensioning means in said bracket means, and locking means for raising the inner end of said tensioning means and forcing the same upward against said fulcrum means.

4. Apparatus for lholding a tension screen in a window frame comprising slotted holding means adjustably attached to said screen through said slots, lever means extending substantially horizontally inward *of said window frame from said holding means `and locking means rotatably affixed to the inner end of said lever means adapted to elevate said inner end with respect to the lower side of said window frame upon rotation thereof.

5. Apparatus for holding a tension screen in a window frame comprising tensioning means affixed to the lower edge of said screen and extending inward of said window frame, bracket means having two faces angularly displaced from each other, means on said bracket means for gripping said tensioning means intermediate its ends, and locking means on said tensioning means for locking said tensioning means in vsaid bracket means.

6. In apparatus for holding -a 4tension screen against a window frame, a tension latch comprising a sectional tubular element adjustably attached to the lower edge of said screen, a horizontal portion extending inwlard of said window frame and spaced from the lower sill thereof having parallel cut-out portions intermediate the ends thereof, and a locking lever rotatable in a plane perpendicular to the plane of said horizontal portions.

7. In apparatus for holding a tension screen in a window frame, a Sill bracket comprising angularly displaced planar faces, means on said faces for receiving screws to fix said bracket to the window sill, means on the underside of said faces for gripping the window sill, and retaining ngers projecting upward iat right angles to the adjacent face of said bracket at the end thereof nearest said screen.

8. Apparatus for holding a tension screen in a window frame comprising bracket means attached to said window frame, vertically adjustable retaining means projecting from said bracket means, tensioning means attached to said screen and engaged by said retaining means, rotatable lever means attached to said tensioning means adapted to rotate the same about said retaining means thereby increasing the tension on said screen.

References Cited in the le of this patent UNITED STATES PATENTS 1,672,896 Marshall June 12, 1928 2,593,539 Cohen Apr. 22, 1952 2,618,332 Gwynne NOV. 18, 1952