Description:
This invention relates generally to a door and door frame assembly and more particularly to a prefabricated steel door hung within its own frame and thus adapted for protective use when operatively installed or hung in the conventional permanently installed frame of an entrance doorway to a building.
The principal objects of the invention are:
To provide an outside door of the character described which is of simple, efficient, durable, inexpensive solid construction made by simple metal cutting and welding operations and of a size to substantially occupy the opening defined by the conventional door frame of a building.
To include as structural elements of the assembly, welded components of the door itself, a metal door frame, a housing for a locking mechanism inaccessible from either the outside or inside of the door except for two aligned openings for the insertion or withdrawal of a key or other lock actuating mechanism.
The foregoing and other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawing forming a part hereof, and in which:
FIG. 1 is an elevational view of a prefabricated door made in accordance with my invention and as viewed from the exterior of a building or doorway.
FIG. 2 is an elevational view of the right side of FIG. 1 with a conventional door and fragments of a door frame shown in broken lines.
FIG. 3 is a bottom end view of FIG. 1.
FIGS. 4 and 5 are sectional views on an enlarged scale taken respectively along the lines 4--4 and 5--5 of 1.
With continuing reference to the drawing wherein like reference numerals indicate like parts, numeral 1 indicates generally a metal door frame comprising side members 2 and 3, respectively, open at their bottom ends, as shown, and permanently interconnected at their top ends by cross member 4. These door frame members are preferably, though not restrictively of angle section as shown in FIG. 3 and are permanently installed and secured within a conventional entrance doorway of an outside building wall W.
The prefabricated steel door made in accordance with my invention comprises side members 6 and 7, a top cross member 8 and bottom cross member 9.
The top and bottom door frame members 8 and 9 are interconnected by vertically disposed laterally spaced apart steel bars 10 permanently secured by welding or the like to the top and bottom cross members 8 and 9. These vertical bars 10 are interconnected at or near their center section by two vertically spaced apart transverse bars 12 and 13 welded at their ends to the side door frame members 6 and 7 and intermediate their ends to the vertical bars 10 on the inside thereof.
A lock housing, as best illustrated in FIGS. 4 and 5, is of box-like formation having a front wall 15, rear wall 16, top wall 17 and a bottom wall 18. The front wall 15 extends downwardly from the bottom wall 18, is bent to the rear as at 19 and welded as at 20 to the lower transverse member 13 of the door. Similarly the top wall 17 is welded as at 21 to the top transverse member 12. The front wall 15 of the lock housing is also welded along one of its sides to the adjacent vertical member 10. The opposite ends of both sides of the front and rear walls 15-16 are welded as at 22, 23 to the door frame member 7.
The wall members 15-16 of the lock housing are provided with aligned openings 25 and 26, through either of which a key (not shown) may be inserted for operative engagement with a locking mechanism (not shown) disposed within the lock housing. The downwardly extending portion of the rear wall of the lock housing and the rearwardly bent bottom end 19 thereof which is welded to the transverse bar 13 renders the door handles of an inside door 42 inaccessible from the exterior of the door 1.
With particular reference to FIGS. 1 and 3, it will be seen that the door 1 being hinged, as at 1A, to the side member 2 of the door frame comprises a unitary assembly mounted by the frame within and secured to the sides and top of an existing standard doorway casing 30 through the wall "W" of a building.
As best illustrated in FIG. 5 the walls 15 and 16 at the open end of the lock housing are internally shouldered as at 32 to facilitate installation and mounting of a locking mechanism (not shown) within the housing. The interior of the lock housing has a conventional locking bolt (not shown) normally in alignment with an opening 34 in the flange 36 of door frame member 7 and with an opening 35 in the flange 37 of the door frame 3.
From the foregoing and as illustrated in full lines in FIG. 5 it will be readily apparent that the flange 40 of the door frame member 7 will provide an abutment or limit stop for closing the door and insure alignment of the locking bolt openings 34 and 35.
It will also be apparent that the inaccessible disposition of a locking bolt within or extending into the aligned locking bolt openings will render the bolt foolproof and inoperable by attempted insertion of a thin plate of steel, a stiff card of celluloid, or the like.
The ornamental iron work (FIG. 1) shown between and secured by spot welding or other suitable means, to the laterally spaced apart rods 10 and to the transverse bars 12 and 13 are primarily intended for decorative or ornamental purposes. However they do serve as obstacles which would prevent or at least interfere with unwanted passage of pet animals from entering a room when the standard door indicated at 42 in FIG. 2 is left open and the door 1 is closed.