Patent US4568820A successfully refreshed from Google Patents.
US4568820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke generator
Assignee: United States Department of the Navy
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Filing: 1984-05-18
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Granted: 1986-02-04
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Expires: 2004-05-18
Abstract
Abstract A smoke generator and system for its employment is disclosed wherein a sm is generated from a liquid smoke producing agent when the liquid is vaporized by pressurized 1000° F. air which has been heated in an electrical resistance coil. The systematic application requires modular use of the electrical resistance coils through an area to provide smoke from a variety of origins in accordance with the control exercised from a centrally located control panel. The smoke producing agent, the pressurized air, and the electrical current are supplied to each module via said control panel.
Inventors
- 👤 Edmund Swiatosz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:21
CPC Classifications
F; F41; F41H; F41H9/00; F41H9/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
183 words
An apparatus for generating smoke from a vaporizable smoke agent material, comprising: means for providing a supply of pressurized air; means for providing a supply of said vaporizable smoke agent material; means for providing a supply of electrical current: a plurality of independent modules, each module having a heat generative, electrically resistive tube coupled to said current providing means and configured in four twenty-five foot sections of tubing coiled in four inch coils, with said four sections being connected in series and with said tube having an input coupled to said air providing means and an output, such that the air conveyed by said tube from its input to its output can be heated, and further each said module having a means coupled to said output of said tube and to said smoke agent material providing means for combining the smoke agent material with the heated air supplied at the output of said tube; means coupled to said tube and to said current providing means, for controlling the rate of said electrical current supplied to said tube in accordance with the temperature thereof.
Claim 2
Independent Claim
183 words
An apparatus for generating smoke from a vaporizable smoke agent material, comprising: means for providing a supply of pressurized air; means for providing a supply of said vaporizable smoke agent material; means for providing a supply of electrical current: a plurality of independent modules, each module having a heat generative, electrically resistive tube coupled to said current providing means and configured in four twenty-five foot sections of tubing coiled in four inch coils, with said four sections being connected in series and with said tube having an input coupled to said air providing means and an output, such that the air conveyed by said tube from its input to its output can be heated, and further each said module having a means coupled to said output of said tube and to said smoke agent material providing means for combining the smoke agent material with the heated air supplied at the output of said tube; means coupled to said tube and to said current providing means, for controlling the rate of said electrical current supplied to said tube in accordance with the temperature thereof.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 wherein said tube is capable of heating air passing through said tubing to at least 1000 degrees F.
Claim 4
Dependent Claim
28 words
The apparatus of claim 1 wherin said current providing means is an alternating current power supply connected across said tube so as to form an electrical circuit therewith.
Claim 5
Dependent Claim
41 words
The apparatus of claim 1 wherein said electrical current controlling means comprises a temperature controller operably mounted proximal said tube to measure the heat radiated thereby, and to control said electrical current in accordance with a predetermined limit for heat transfer.
Claim 6
Dependent Claim
53 words
The apparatus of claim 1 wherin said tube comprises an electrically resistive tubing connected to complete an electrical circuit withsaid current providing means, and current controlling means is connected across said tube to measure the change in resistivity thereof as a function of temperature and control said rate of electrical current supplied accordingly.
Claim 7
Dependent Claim
52 words
The apparatus of claim 1 wherein said combining means is a nozzle to shear said smoke agent material into a vapor in conjunction with said pressurized air, having an inlet for said air connected to said tube and an inlet for said smoke agent connected to said smoke agent material providing means.
Claim 8
Dependent Claim
65 words
The apparatus of claim 1 wherein said means for providing a supply of said vaporizable smoke agent material comprises: a reservoir for storing said smoke agent in liquid form; pump means for urging said smoke agent toward said combining means; conduit means connecting said reservoir, pump means, and combining means; and valve means in said conduit means between said pump means and said combining means.
Claim 9
Dependent Claim
28 words
The apparatus of claim 1 wherein said tube and combining means are disposed about an area such that a plurality of sources for smoke may be independently simulated.
Claim 10
Dependent Claim
22 words
The apparatus of claim 1 wherein each module has an independent means for controlling the rate of said electrical current supplied thereto.
Claim 11
Dependent Claim
51 words
The apparatus of claim 9 further comprising a control panel operably connected to each module such that the rate of electrical current supplied may be controlled at a location remote from said module, said control panel including means for variably setting the rate of electrical current supplied to each module individually.
Claim 12
Dependent Claim
28 words
The apparatus of claim 10, further comprising remotely controlled valve means associated with each module for controlling the rate of pressurized air and smoke producing agent received thereby.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |