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Publication numberUS432404 A
Publication typeGrant
Publication dateJul 15, 1890
Publication numberUS 432404 A, US 432404A, US-A-432404, US432404 A, US432404A
InventorsFrederick Grinnell
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 432404 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

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No, 432,404; Patented July 1'5, 1890.




SPECIFICATION forming part of Letters Patent No: 432,404, dated July 15, 1890.

Application filed February 19, 1890. Serial No. 31LLO45- (N0 model.)

To all whom it may concern.-

Be it known that I, FREDERICK GRINNELL, of Providence, in the county of Providence and State of Rhode Island, have invented a certain new and useful Improvement in Automatic Fire-Extinguishers, of which the following is a specification.

My invention is an improvement in auto matic fire-extinguishers or sprinklers adapted to be attached to a Water-pipe and provided with an outlet closed by a valve, the valve being held to its seat by a fusible joint or other heat-actuated device, so that at a predetermined temperature the valve is released and allows the water to discharge and extinguish the fire. It sometimes happens that the valve from one cause or another becomes so stuck to the valve-seat that it cannot be forced off by the internal pressure when the operation of the heat-actuated device has left itotherwise free to move. I

My invention tends to obviate this difficulty in a very simple manner by providing means for tripping the valve and forcing it off its seat.

My invention consists in combining with a movable valve-seat a valve and a tripping device, so that the movement that is given to the valve by its seat will cause the former to come in contact with the tripping device, or

otherwise so bring it into operation as to force or pry the valve from its seat.

In the accompanying drawings, Figure 1 is a sectional view of an automatic fire-extinguisher embodying one form of my invention and showing the valve closed. Fig. 2 is a similar view showing the valve in the act of opening.

The extinguisher consists, essentially, of a base 1, adapted to be secured into a pipefitting, an arch 2, supporting a deflectingplate 3, a heat-actuated device at, with an adjusting-screw 5, a valve 6, and a valve-seat 7. The heat-actuated device 4 may consist of two bevel-ended struts 8 8, secured together at 9 by fusible solder, the joint being further held bythe two half-sleeves 10, which are also secured together and to the strut by fusible solder. The valve (3 is shown seated on a flexible diaphragm valve-seat 7,made of resilient sheet metal. Any other suitable form of movable valve-seat may be used so long as it is of such a construction that it will move under the influence of the internal pressure when the valve is released from the restraining-pressure of the heat-actuated device. Such equivalent devices are well-known in the art and need not be described here.

The valve 6 is provided with an arm or project-ion 11, adapted to strike against a lug 12 or other fixed stop on the frame of the extinguisher when the valve is thrown outward by the movement of the valve-seat. The effect of this is to wrench or pry the valveoff of its seat, and it will be understood that the whole force of the pressure against the diaphragm is utilized for this purpose. The lug 2 may be so extended as to overlap the edge of the valve itself, in which case the arm 11 would be unnecessary, and it is very evident that many other varieties of the invention might be practiced. I wish it therefore to be understood that I do not bind myself to the specific means shown for tripping the valve, as any other suitable devices accomplishing the same result in substantially the same way would be within the scope of my invention.

What I claim as new, and desire to secure by Letters Patent, is-

1. An automatic fire-extinguisher having a valve, a movable valve-seat, and a heatactuated device for restraining the movement of the valve and the valve-seat until the occurrence of a fire, combined with a tripping device for forcing the valve from its seat, said tripping device being brought into action by the movement of the valveseat, substantially as and for the purpose set forth.

2. The combination, in an automatic fireextinguisher, of the valve and a movable valve-seat, with a fixed stop adapted to engage with the valve when the latter is forced out by the movement of the valve-seat.

The combination, in an automatic fire-extinguisher, of the fixed stop, the flexible valveseat, and a valve having a projecting arm adapted to engage with the fixed stop when the valve is forced outward by the movement of the flexible valve-seat, substantially as described.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2615461 *Mar 9, 1950Oct 28, 1952Willis Crow WilliamAutomatic fire and earthquake responsive cutoff valve
US4457329 *Dec 4, 1981Jul 3, 1984Air Products And Chemicals, Inc.Safety pressure regulator
US6918545May 10, 2002Jul 19, 2005The Viking CorporationSprinkler head trigger assembly
US9539451 *May 6, 2016Jan 10, 2017Bulb Link, LLCHeat-sensitive trigger for a fire sprinkler valve
US20030209353 *May 10, 2002Nov 13, 2003Franson Scott ThomasSprinkler head trigger assembly
Cooperative ClassificationA62C37/12