US3889754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguishing system
Assignee: FIRE FOX Corp
•
Filing: 1973-09-25
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Granted: 1975-06-17
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Expires: 1993-09-25
Abstract
Abstract A fire extinguishing system for extinguishing a fire on a cooking range in which a hood is mounted above the range, an elongated tubular container is mounted in the hood, a body of dry, powder-form fire extinguishing agent, containing 50 to 95 percent by weight of a metal carbonate, such as, sodium bicarbonate, 5 to 50 percent by weight of a metal silicate, such as, precipitated calcium silicate, and up to 5 percent by weight of a desiccant, such as, calcium stearate, is packed in the container between a frangible, moisture impervious disc and a free-floating piston, the disc end of the container terminates in a deflector head, adapted to direct the extinguishing agent downwardly, which carries a plurality of movable distributing nozzles, each of which is aimed at an individual burner of the range and which are provided with means for discharging the extinguishing agent in a vortical pattern, the piston end of the container is closed by a second frangible, moisture impervious disc, an actuating means, including a bottle of pressurized CO2 and a pivoted, spring-loaded arm carrying a pin to puncture the seal of the CO2 bottle, is mounted adjacent the second disc to generate sufficient pressure to fracture the second disc, drive the piston the length of the container, and pressurize the extinguishing agent sufficiently to fracture the first disc and discharge the extinguishing agent through the nozzles, a spring clip is provided to clamp the actuator arm in the cocked position with the spring under tension, and an elongated, flame-actuated sensor means, resistant to spontaneous ignition at the temperatures normally encountered in the hood, such as, a fuse wire having an aluminum core and a palladium sheath, is wrapped around the spring clip to hold it about the actuator arm, extends through an aperture in a closure cap on the container and is led across the lower lip of the hood across two burners of the range, then along the length of the hood to a point adjacent the other two burners and thence across the other two burners, whereby a flame contacting the sensor burns the sensor thereby releasing the spring clip and the actuating arm to puncture the CO2 bottle, the CO2 fractures the one disc and forces the piston through the container thereby pressurizing the extinguishing agent, and the extinguishing agent fractures the other disc and is discharged through the nozzles.
Inventors
- 👤 Byron G Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:28
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; A; A62; A62C; A62C3/00; A62C3/006; F24C15/2021
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
126 words
AN IMPROVED FIRE EXTINGUISHING SYSTEM, COMPRISING; CONTAINER MEANS; A BODY OF DRY, POWDER-FORM FIRE EXTINGUISHING AGENT COMPRISING A METAL CARBONATE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, ALKALI METAL BICARBONATES, ALKALINE EARTH METAL CARBONATES, ALKALINE EARTH METAL BICARBONATES AND MIXTURES THEREOF, IN A MAJOR AMOUNT OF ABOUT 50 TO 95 PERCENT BY WEIGHT, AND A SYNTHETIC METAL SILICATE, IN A MINOR AMOUNT OF ABOUT 50 TO 5 PERCENT BY WEIGHT AND SUFFICIENT TO FORM AN AIR-IMPERMEABLE COATING ON THE BURNING SURFACE TO WHICH IT IS APPLIED AND PREVENT REIGNITION OF AN EXTINGUISHED FLAME FOR AT LEAST 10 MINUTES, DISPOSED IN SAID CONTAINER; EXPELLING MEANS FOR EXPELLING SAID EXTINGUISHING AGENT FROM SAID CONTAINER; AND A FLAME-ACTUATED SENSOR MEANS, RESISTANT TO SPONTANEOUS IGNITION AT TEMPERATURES NOR-
Claim 2
Dependent Claim
126 words
AN IMPROVED FIRE EXTINGUISHING SYSTEM, COMPRISING; CONTAINER MEANS; A BODY OF DRY, POWDER-FORM FIRE EXTINGUISHING AGENT COMPRISING A METAL CARBONATE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, ALKALI METAL BICARBONATES, ALKALINE EARTH METAL CARBONATES, ALKALINE EARTH METAL BICARBONATES AND MIXTURES THEREOF, IN A MAJOR AMOUNT OF ABOUT 50 TO 95 PERCENT BY WEIGHT, AND A SYNTHETIC METAL SILICATE, IN A MINOR AMOUNT OF ABOUT 50 TO 5 PERCENT BY WEIGHT AND SUFFICIENT TO FORM AN AIR-IMPERMEABLE COATING ON THE BURNING SURFACE TO WHICH IT IS APPLIED AND PREVENT REIGNITION OF AN EXTINGUISHED FLAME FOR AT LEAST 10 MINUTES, DISPOSED IN SAID CONTAINER; EXPELLING MEANS FOR EXPELLING SAID EXTINGUISHING AGENT FROM SAID CONTAINER; AND A FLAME-ACTUATED SENSOR MEANS, RESISTANT TO SPONTANEOUS IGNITION AT TEMPERATURES NOR-
Claim 3
Dependent Claim
15 words
A system in accordance with claim 1 wherein the container means is a generally-tubular container.
Claim 4
Dependent Claim
28 words
A system in accordance with claim 2 wherein a frangible disc means is mounted in the container in contact with one end of the body of extinguishing agent.
Claim 5
Dependent Claim
29 words
A system in accordance with claim 3 wherein a free-floating piston means is mounted in the container in contact with the other end of the body of extinguishing agent.
Claim 6
Dependent Claim
31 words
A system in accordance with claim 4 wherein a second frangible disc means is mounted in the container on the side of the piston means opposite the body of extinguishing agent.
Claim 7
Dependent Claim
40 words
A system in accordance with claim 5 wherein the expelling means is a pressure-generating means for rupturing the second frangible disc and forcing the piston means through the container whereby the pressurized extinguishing agent ruptures the first frangible disc means.
Claim 8
Dependent Claim
34 words
A system in accordAnce with claim 2 wherein piston means is mounted in the container in contact with one end of the body of extinguishing agent for expelling said extinguishing agent from said container.
Claim 9
Dependent Claim
23 words
A system in accordance with claim 7 wherein the expelling means is a pressure-generating means for driving the piston means through the container.
Claim 10
Dependent Claim
24 words
A system in accordance with claim 2 wherein the body of extinguishing agent is disposed in the container between a pair of frangible discs.
Claim 11
Dependent Claim
18 words
A system in accordance with claim 2 wherein the body of extinguishing agent is packed in the container.
Claim 12
Dependent Claim
22 words
A system in accordance with claim 10 wherein the body of extinguishing agent is packed in the container by shaking said container.
Claim 13
Dependent Claim
30 words
A system in accordance with claim 10 wherein the body of extinguishing agent is packed in the container by vibrating said container while introducing said extinguishing agent into said container.
Claim 14
Dependent Claim
48 words
A system in accordance with claim 2 wherein the discharge end of the generally-tubular container is closed by a deflecting means having a passage in open communication with the interior of said container for deflecting the extinguishing agent in a path perpendicular to the axis of said container.
Claim 15
Dependent Claim
22 words
A system in accordance with claim 1 wherein at least one distributing nozzle is mounted on the discharge end of the container.
Claim 16
Dependent Claim
23 words
A system in accordance with claim 14 wherein the distributing nozzle includes means for discharging the extinguishing agent therethrough in a vortical pattern.
Claim 17
Dependent Claim
58 words
A system in accordance with claim 15 wherein the entrance end of the distributing nozzle is closed except for a plurality of passages, in open communication with the container and the exit end of said nozzle, and said passages are parallel to and offset from radii of said nozzle and inclined downwardly toward the axis of said nozzle.
Claim 18
Dependent Claim
80 words
A system in accordance with claim 16 wherein the passages are formed by a plurality of slots formed in the entrance end of the nozzle parallel to and offset from radii of said nozzle and a plug means is mounted in the entrance end of said nozzle, having a generally-conical configuration with its apex toward the exit end of said nozzle, and at least part of the walls of said conical configuration is opposite the interior openings of said slots.
Claim 19
Dependent Claim
34 words
A system in accordance with claim 14 wherein the discharge end of the distributing nozzle is movable in a manner to aim said nozzle at a desired point in the area to be protected.
Claim 20
Dependent Claim
23 words
A system in accordance with claim 14 wherein the distributing nozzle is mounted on the container by means of a nozzle support head.
Claim 21
Dependent Claim
31 words
A system in accordance with claim 19 wherein the nozzle support head is provided with an aperture for the nozzle and the discharge end of said nozzle passes through said aperture.
Claim 22
Dependent Claim
49 words
A system in accordance with claim 20 wherein the nozzle support head has a generally-hemispherical projection projecting outwardly, the aperture is formed in said projection and the nozzle has a generally-hemispherical, annular portion formed adjacent its entrance end which conforms to the shape of said projection and fits therein.
Claim 23
Dependent Claim
69 words
A system in accordance with claim 21 wherein a nozzle retainer means has a generally-hemispherical portion formed on one end, which conforms to the shape of the hemispherical projection of the support head, and a central passage therethrough, which conforms to the outside contour of the discharge end of the nozzle, and is mounted over that end of the nozzle which projects through the aperture of said hemispherical projection.
Claim 24
Dependent Claim
42 words
A system in accordance with claim 22 wherein the aperture through the hemispherical projection of the support head is sufficiently large to permit sliding movement of the nozzle and the retainer over a relatively large area of the surface of said projection.
Claim 25
Dependent Claim
29 words
A system in accordance with claim 1 wherein the extinguishing agent comprises 85 to 60 percent of the metal carbonate and 15 tO 40 percent of the metal silicate.
Claim 26
Dependent Claim
29 words
A system in accordance with claim 1 wherein the extinguishing agent comprises 78 to 80 percent of the metal carbonate and 19 to 20 percent of the metal silicate.
Claim 27
Dependent Claim
14 words
A system in accordance with claim 1 wherein the metal carbonate is sodium bicarbonate.
Claim 28
Dependent Claim
14 words
A system in accordance with claim 1 wherein the metal silicate is calcium silicate.
Claim 29
Dependent Claim
15 words
A system in accordance with claim 27 wherein the calcium silicate is precipitated calcium silicate.
Claim 30
Dependent Claim
29 words
A system in accordance with claim 1 wherein the metal silicate is selected from the group consisting of alkali metal silicates and alkaline earth metal silicates and mixtures thereof.
Claim 31
Dependent Claim
24 words
A system in accordance with claim 1 wherein the fire extinguishing composition contains a small amount, up to about 5 percent, of a desiccant.
Claim 32
Dependent Claim
13 words
A system in accordance with claim 30 wherein the desiccant is calcium stearate.
Claim 33
Dependent Claim
19 words
A system in accordance with claim 30 wherein the desiccant is present in an amount of about 3 percent.
Claim 34
Dependent Claim
15 words
A system in accordance with claim 1 wherein the expelling means is a pressure-generating means.
Claim 35
Dependent Claim
24 words
A system in accordance with claim 33 wherein the pressure-generating means is a container of gas under pressure and means for releasing said gas.
Claim 36
Dependent Claim
12 words
A system in accordance with claim 34 wherein the gas is CO2.
Claim 37
Dependent Claim
22 words
A system in accordance with claim 34 wherein the means for releasing the gas is a puncturing means for puncturing said container.
Claim 38
Dependent Claim
20 words
A system in accordance with claim 36 wherein the puncturing means is a spring-biased arm means carrying a puncturing pin.
Claim 39
Dependent Claim
22 words
A system in accordance with claim 37 wherein the arm is normally held, with the spring under tension, by the sensor means.
Claim 40
Dependent Claim
37 words
A system in accordance with claim 37 wherein the arm is held, with the spring under tension, by a clip means and said clip means is held in engagement with said arm means by the sensor means.
Claim 41
Dependent Claim
15 words
A system in accordance with claim 1 wherein the sensor means is a wire-type fuse.
Claim 42
Dependent Claim
15 words
A system in accordance with claim 40 wherein the wire-type fuse contains a noble metal.
Claim 43
Dependent Claim
13 words
A system in accordance with claim 41 wherein the noble metal is palladium.
Claim 44
Dependent Claim
13 words
A system in accordance with claim 41 wherein the noble metal is platinum.
Claim 45
Dependent Claim
25 words
A system in accordance with claim 41 wherein the wire-type fuse contains a major portion of aluminum and a minor portion of a noble metal.
Claim 46
Dependent Claim
13 words
A system in accordance with claim 44 wherein the noble metal is palladium.
Claim 47
Dependent Claim
13 words
A system in accordance with claim 44 wherein the noble metal is platinum.
Claim 48
Dependent Claim
16 words
A system in accordance with claim 1 wherein the metal silicate is a precipitated metal silicate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |