US991605A - Fireproof shutter. - Google Patents

Description

R. E. BYRNE.

FIREPROOF SHUTTER.

APPLICATION FILED MAR. 26, 1910.

Patented May 9, 1911.

INUENTDFi UNITED STATES PATENT @FFICE.

RODERICK EDWARD BYRNE, OF DTTAWA, ONTARIO, CANADA, ASSIGNOR OF ONE-HALF TO JOSEPH ROBERT CAMERON, OF OTTAWA, CANADA.

FIREPROOF SHUTTER.

Specification of Letters Patent.

Patented May 9, 1911.

To all whom it may concern:

through the reel and having hook-shap-ed Be it known that I, RODERICK EDWARD I ends 17 to engage and clamp the cable.

Brawn, of the city of Ottawa, in the Province of Ontario, Canada, have invented certain new and useful Improvements in F ireproof Shutters, of which the following is a specification.

My invention relates to improvements in fire proof shutters, and the objects of my invention are to provide an improved form of shutter having increased insulating properties, and also to provide an improved automatic means for closing the same in the case of fire.

The improved insulating effect is secured by forming the shutter of tubular air containing members, and the shutter is' adapted to be automatically moved to closed position in case of a fire by means of a weight held by a fusible link adapted to fall a determined distance, and in falling to engage and strike hooks on the shutter which cause the same to move to closed position, all as hereinafter more fullyset forth and described in detail in the accompanying specifications and drawings.

In the drawings: Figure l is a perspective view of the shutter. Fig. 2 is a perspective detail of a portion .of the shutter. Fig. 3 is a side view of the reel on which the shutter is supported. Fig. 4 is a cross section through the reel on the line 22, Fig. 3. Fig. 5 is a sectional view through an alternative form of the invention.

In the drawings, like characters "of reference indicate corresponding parts in each figure.

Referring to the drawings, A represents a window frame of usual construction and B a reel supported in a casing C above the window frame, the reel being suitably journaled in side members 10 and 11 on the casing.

' The reel itself is formed of a hollow tubular member having reduced ends 12 and 13 which are journaled in the side members as specified, the reel being thus hollow and filled with air is well-adapted to resist the eat.

D represents the shutter proper, which clamping bolts 16 extending transversely The tubular members 14 may be conveniently formed of sheet metal and may if desired be each formed witha flange 18 adapted to overlap the adjacent member and, thereby, secure a very tight and completely closed shutter. As these members contain air, they are well adapted to resist the heat The ends of the tubular members slide in guideways 19 y at the side of the window frame, said guideways as well as the casing C, being of course, formed of fire proof material such as sheet metal.

In order to enable the shutter to be raised and lowered conveniently, it is counter-balanced by suitable means. In the embodiment illustrated, a conoidal drum 20 is provided at one end of the reel having a spiral groove into which a chain 22 fits having at its extremity a weight 23 of suflicient amount to just counter-balance the shutter. An auxiliary balancing device (see dotted lines Fig. 1) is also provided consisting of a chain 24 and weight 25. The chain 24 is connected :to the drum 20 at 26 and extends to the interior of the building, so that when it is desired to lower the shutter, the weight 25 on the interior, willbe raised, permitting the shutter to overbalance and close.

In order to quickly move the shutter to closed position, in the case of fire, a weight member 24 is provided, normally held at'the top of the window by means which are destructible by heat such as a fusible link member 25, said weight being'adapted when released to drop and engage suitable engaging means on the shutter and, thereby, force the same to closed position. In the embodiment illustrated, these engaging means are in the form of hooks 26.

It is not necessary that the weight should fall the entire length of the window as the impact given by falling a short distance would impart sufficient velocity to the curtain to cause it to move to closed position. It is, therefore, desirable to limit the down-' ward movement of the weight when released, anal this is done by chains 27 at opposite en s.

In the alternative form shown in Fig. 5, the tubular members 14* have the flanges omitted and are substantially circular in crosssection.

It will thus be seen that I have provided a simple and effective form of shutter which is well adapted to resist fire, and which in the case of a fire will be automatically moved to closed position and at the same time the shutter is counter-balanced and may be closed at night or other periods without interfering with the automatic arrangement.

As many changes could be made in the above construction, and many apparently widely different embodiments of my invention within the scope of the claims could be made without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanyingspecifications and claims shall be interpreted as illustrative and not in a'limiting sense.

What I claim as my invention is:'

1. A fireproof shutter comprising a reel formed with a hollow tubular central portion and reduced ends, a casing inclosmg said reel and journaling said ends, a drum connected to said reel formed with a spiral groove, a chain in said groove and a counlating apertures permitting the escape of heated air from said tubular members.

3. A fire proof shutter comprising a frame formed with guideways therein and ventilating apertures communicating with the guideways, and a plurality of tubular air containing members in the guideways.

4. A fire roof shutter comprising a reel, a casing inc osing said shutter and secured on the exterior of a building, counter-balancing means'connected to said reel and being accessible from the exterior of said building, auxiliary balancing means connected to said reel and accessible from the interior of said building, and a fire proof curtain mounted on said reel formed with hollow, tubular air containing members.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

RODERICK EDWARD BYRNE.

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