US2375996A - Folding gate screen - Google Patents

Description

May 15, 1945. A. KAUFMAN ET AL FOLDING GATE SCREEN Filed July 2, 1943 To. B

. n w w fy ro IHHIHIJ INVENTORS ABRAHAM KAUFMAN HARRYKmeMA/v BY y ATTORNEY mmw Patented May 15, 1945 OFFICE 2,375,996 FOLDING GATE SCREEN Abraham Kaufman and Harry Korman, New York, N. Y.

. Application July 2, 1943, Serial No. 493,246

2 Claims.

This invention relates to folding gate screens.

Heretofore folding gate screens have been made of bars of channel shaped cross-section. These bars were so wide that they could not be fabricated into a screen with openings so small that it would be difiicult to put a hand through.

It is an object of the present invention to provide a folding gate, the openings of which are so small when opened up, that a hand or an arm cannot be put through them, whereby to prevent burglars from breaking a window behind the gate and'removing objects through the openings in the folding gate or screen.

It is a further object of this invention to pro-.

vide a folding gate screen fabricated of bar stock of relatively small dimension and rectangular cross-section, and producing small openings through which a hand cannot be inserted.

Yet another object of thi invention is to provide a strong, durable and economical folding Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements,

cated in the following claims.

In the accompanying drawing, in which is shown various possible illustrative embodiments of this invention,

Fig. 1 is a front, elevational view of gate embodying the invention;

Fig. 2 is an enlarged partial view of the gate opened up;

Fig. 3 is a cross-sectional view taken on line 33 of Fig. 2;

Fig. 4 is a partial, front view of one of the bars of which the screen is constructed;

Fig. 5 is a top plan view of a die press illustrating the method of slitting and punching a bar in accordance with the ing the invention;

Fig. 6 is an elevational, cross-sectional view of a die illustrating one step in the process of making the bars of which the screen is fabricated; and

Fig. 7 is a view similar to Fig. 6 but illustrating a further step in the manufacture of the bars.

a folding improved process embodyenlarged opening were made of channel shaped construction, and

were interpivoted at such spaced points that when the screen was opened up the openings inthe screen were so large that a hand or an arm could easily be passed therethrough. This was so because the channel bars had to be wide. Such construction led to considerable burglary, as a burglar would break the window behind the screen, insert his arm through the openings in the screen, and remove Objects behind the window. In accordance with the present invention the bars 14 and I5 are made of rectangular stock of relatively small dimensions.

It will be noted that the bars l4 and I5 are of square stock and may be made of cold rolled steel or the like material. Said bars may be only A; of an inch in width or thickness.

Highly improved means is utilized to permit these bars to be interpivoted without unduly weakening said bars. To this end the bars I4 and ii are formed with punched holes and the metal at the hole expanded during the punching operation, to provide a suitable opening l1 through which the rivet l6 may pass.

In accordance with the present invention the openings H are formed by first punching slits I8 in the bar and then punching the holes l1. To carry out these operations there is provided a press P comprising a base is formed with a longitudinal slot 2| having an enlarged portion 22. Embedded in the bottom wall of the slot 2| at the enlarged opening 22 is an upwardly pointed fixed chisel die 23. The edge of the chisel runs longitudinally of the slot 2!. There is further provided a vertically movable, downwardly pointing chisel die 24 aligned with the fixed die 23. The bar i placed within the slot 2|, and the die 24 then comes down, forming slits I8 in the top and bottom of the bar, and slightly expanding the metal as at 24'. The bar is then moved to bring the expanded portion 24 of the bar into another 25 in the base l9- of the die. Opening 25 is spaced from opening 22 by the distance between punched holes l1.

The bottom wall 21 of the base I9 is formed with a through opening 28. Above the opening 28 is a vertically movable die puncher 30 having a tapered lower end 30a adapted to be moved downwardly into the slit l8 and down into the hole 28 to expand the metal further as shown at 33 and forming the punched hole 11.

Only a small amount of metal is punched out so that the bar is still relatively strong at the openings H.

The slitting die of Fig. 6 and opening die of Fig. '7 may be spaced apart the distance between the openings so that the bar may be moved along and the dies work simultaneously so that as the bar is being slitted at one point, the slit which has already been formed is beneath the die 30. Thus as each slit is being formed the next slit is being punched.

The expanded portions 33 keep the bars slightly spaced when the screen is collapsed.. However, the screen may be compact and the rivets l6 relatively closely spaced so that the openings 40,

are so small that a burglar cannot put his hand through it and remove objects therethrough.

The square stock bars are furthermore less expensive and the weight of the gate is considerably less than gates made of channel shaped stock.

It will thus be seen that vice in which the several objects there is provided a deof this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiments above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense,

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. A folding gate screen comprising bars formed with rivet openings, rivets passing through said openings to interpivot said bars, the metal of said bars being expanded at said openings, the transverse cross-sectional area of said bars at said openings being substantially the same as the transverse cross-sectional area of said bars between said openings.

2. A folding gate screen comprising bars formed with rivet openings, rivets passing through said openings to interpivot ,said bars, the metal of said bars being expanded at said openings, said bars being of substantially square stock, the transverse cross-sectional area of said bars at said openings being substantially the same as the transverse cross-sectional area of said bars between said openings, and the metal of said bars being expanded at said openings.

ABRAHAM KAUFMAN. HARRY KORMAN.

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