US 998620 A
Description (OCR text may contain errors)
E. R. LEONARD.
APPLICATION FILED $313.18, 1911.
Patented July 25, 1911.
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Specification of Letters Patent.
Application filed February 18, 1911.
Fatented July 25, 1911.
Serial No. 609,487.
To all whom it may concern:
Be it known that I, Enos R. LEONARD, a citizen of the United States and of the State of New Jersey, residing at Woodclifi', New Jersey, have invented certain new and useful Improvements in Fireproof Doors, of which the following is a specification.
My invention relates to fire-proof doors consisting essentially of a wooden framework covered with sheet metal and provided with incombustible panels secured in the frame; and my improvements consist in the particulars hereinafter pointed out.
In the drawings Figure 1 is a front elevation of my improved door; Fig. 2 is an edge of the same; Fig. 3 is a vertical sectional view on an enlarged scale, taken on the line X X of Fig. 1, part of the construction being broken away; and Fig. 4 shows a vertical section of a middle rail modified to receive a single pane or panel instead of the double panels shown in Fig. 3.
The same reference numerals designate the same parts in all the figures.
The side stiles 1, 1, top rail 2, bottom rail 3, and middle rails 4, 4, are all madeiof Wood and are entirely covered with sheet metal 5, which is drawn around them so as to leave no portion of these separate pieces of wood uncovered. The framework of the door is secured together by rods 6, 6, passing entirely through the door from side to side, and having their heads and their securing nuts 7, 7, countersunk.
Those portions of the sheet metal covering of the wooden frame which surround the panel openings, are bent out parallel to the framework in flanges 8, 9, which are se cured together by rivets 10, 10, the upper edge of one flange being then bent over the other and narrower flange, as shown in Fig. 3, thus making a clenched seam and efi'ectually guarding against the possibility of any flame coming in contact with the wood in case of fire.
At the interior angles I put corner plates 11, 11, which are riveted to the flanges to stiffen the construction and hold them securely in osition; and over the flanges I slip retaining strips 12, 12, of sheet metal, having a central groove to straddle the flange and being bent outward at 13, 13, to rest against the rail, and being then bent up at 14, 14, to form a panel-receiving groove.
To insert the panels 15, 15, which are preferably made of asbestos board, but may be of glass or other incombustible material,
the flanges 14, 14, are bent down, and, after the panels have been put in place, are bent up again into the positions shown in the res.
Metal covered moldings 16, 16 are fitted in the angles between the panels and the frame, and are secured in place by nails 17 17, driven through them and into the frame, as shown in the lower part of Fig. 3. These moldings 16, 16, are not necessary to the stability of the door, but are added to cover the metal flange construction and to give an attractive finish to the door.
It will be seen that by this construction the wooden frame is entirely covered with metal so that not even at the joints can a flame reach the wood itself. Even the rods 6, 6, lying in the bottoms of the grooves in the edges of the middle rails, are covered up by the sheet metal, and air cushions are formed between the edges of the panels and the rails and between the panels themselves, forming excellent non-conductors of heat.
In Fig. 4 I have shown a modification wherein one panel 15, is used instead of two. In this case-the edges of the metal covering 5 are brought together at one side of the panel receiving groove, being riveted and clenched together as in the case of the preferred form, and support one side of the panel 15. The ornamental moldings 16 are made heavier, in order to fill up the deeper angles left by the single panel, and are nailed in place, as already described.
By means of my improvement I secure a door which will withstand a very high degree of heat and direct flames without becoming ignited, which is strong and durable,
and the panels of which can be removed or replaced with little trouble if that is desired.
Having thus described my invention, what I claim and desire to secure by Letters Patent of the United States, is
1. In a fire-proof door, the combination of wooden rails and stiles severally, completely covered with sheet metal the edges of which are formed into inwardly projecting flanges surrounding the panel spaces, grooved panel-holding strips straddling said flanges, and a panel held in position by said strips.
2. In a fire-proof door, the combination of wooden rails and stiles severally, completely covered with sheet metal the edges of which are formed into inwardly projecting flanges surrounding the panel spaces, grooved panelholding strips straddling said flanges, and a panel detachably held in position by the upturned edges of said strips.
3. In a fire-proof door, the combination of wooden rails and stiles severall completely covered with sheet metal the e ges of which are formed into inwardly projecting flanges surrounding the panel spaces, grooved panelholding strips straddling said flanges and having air cushions between their bases and the rails, and a panel held in position by said strips.
4. In a fire-proof door, the combination of wooden rails and stiles severall completely covered with sheet metal the e ges of which are formed into inwardly projecting flanges surrounding the panel spaces, grooved panelholding stri s straddling said flanges, and double pane s, with an air cushion between them, held in position by said strips.
5. In a fire-proof door, the combination of wooden rails and stiles severall completel covered with sheet metal the edges of whic are formed into inwardly projecting flanges surrounding the panel spaces, grooved panelholding strips straddling said flanges, a panel held in osition by said strips, and ornamental mo dings in the angles between the panel and the frame.
' ELOF R. LEONARD.
HOWARD M. Rows, WILLIAM H. MOLER.