US4069701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable agent generator
Assignee: United States Department of the Army
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Filing: 1976-09-07
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Granted: 1978-01-24
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Expires: 1996-09-07
Abstract
Abstract A test agent, generation system capable of producing a low constant vapor test agent for use in a method of calibrating and checking the GB agent sensitivity of a point-source alarm system.
Inventors
- 👤 Frederick C. Baldauf
- 👤 Kwok Y. Ong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:47
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0006
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
156 words
A self-contained system for generating a dilute agent vapor of desired concentration for use in calibrating and testing the sensitivity of an agent point-source alarm by the agent vapor consisting essentially of an air supply source for providing an air flow to the system; valves for regulating said air flow; a drierite column and charcoal filtering means for purifying said air flow; a flowmeter to regulate the flow of said purified air to a bubbler means, the bubbler means containing a dilute liquid agent solution through which said air flow is bubbled to produce an agent vapor; cooling means attached to said bubbler for maintaining the liquid agent solution within the bubbler at a constant temperature; a interconnected means for adding a regulated flow of air to said agent vapor to produce a dilute agent vapor of desired concentration and a means for flowing said dilute agent vapor from the system to a point-source agent alarm.
Claim 2
Dependent Claim
156 words
A self-contained system for generating a dilute agent vapor of desired concentration for use in calibrating and testing the sensitivity of an agent point-source alarm by the agent vapor consisting essentially of an air supply source for providing an air flow to the system; valves for regulating said air flow; a drierite column and charcoal filtering means for purifying said air flow; a flowmeter to regulate the flow of said purified air to a bubbler means, the bubbler means containing a dilute liquid agent solution through which said air flow is bubbled to produce an agent vapor; cooling means attached to said bubbler for maintaining the liquid agent solution within the bubbler at a constant temperature; a interconnected means for adding a regulated flow of air to said agent vapor to produce a dilute agent vapor of desired concentration and a means for flowing said dilute agent vapor from the system to a point-source agent alarm.
Claim 3
Dependent Claim
28 words
The system of claim 1 further including an in-line orifice for limiting the air flow from the air supply source to the drierite column and charcoal filtering means.
Claim 4
Dependent Claim
19 words
The system of claim 1 wherein the cooling means is an ice-bath container in which the bubbler is disposed.
Claim 5
Dependent Claim
14 words
The system of claim 1 wherein the air supply source is an air pump.
Claim 6
Dependent Claim
15 words
The system of claim 1 wherein the air supply source is a compressed air tank.
Claim 7
Independent Claim
157 words
A method for generating a low, stable concentration of agent vapor within a fast equilibration time for use in calibrating and testing the sensitivity of a agent alarm system comprising the steps of providing a source of air to a system for generating a dilute agent vapor, the system including the steps of regulating the flow of said air to a bubbler by means of valves and an air flowmeter; flowing the air through a charcoal filter and a drierite column to filter said air; flowing the filtered air through the flowmeter to provide a constant flow of air to the bubbler; bubbling the air through a dilute agent solution within the bubbler to produce an agent vapor; diluting the agent vapor eluted from the bubbler by adding a regulated flow of air to said agent vapor to produce a dilute agent vapor of desired concentration and subsequently introducing said dilute agent vapor into the agent alarm.
Claim 8
Independent Claim
157 words
A method for generating a low, stable concentration of agent vapor within a fast equilibration time for use in calibrating and testing the sensitivity of a agent alarm system comprising the steps of providing a source of air to a system for generating a dilute agent vapor, the system including the steps of regulating the flow of said air to a bubbler by means of valves and an air flowmeter; flowing the air through a charcoal filter and a drierite column to filter said air; flowing the filtered air through the flowmeter to provide a constant flow of air to the bubbler; bubbling the air through a dilute agent solution within the bubbler to produce an agent vapor; diluting the agent vapor eluted from the bubbler by adding a regulated flow of air to said agent vapor to produce a dilute agent vapor of desired concentration and subsequently introducing said dilute agent vapor into the agent alarm.
Claim 9
Dependent Claim
38 words
The method of claim 6 wherein the steps of providing air to the bubbler and the step of diluting the agent vapor by adding a regulated flow of air utilizes air provided by a single air supply source.
Claim 10
Dependent Claim
29 words
The method of claim 7 wherein the air supply source is selected from the group consisting of a air pump means, a compressed air tank and a house-air line.
Claim 11
Dependent Claim
14 words
The method of claim 8 wherein the air supply source is an air pump.
Claim 12
Dependent Claim
23 words
The method of claim 6 wherein the solution within the agent bubbler is a dilute isopropyl methyl phosphonofluoridate (GB) solution in hexylene glycol.
Claim 13
Dependent Claim
32 words
The method of claim 10 wherein the agent is present in a 2% solution and the flow of air is regulated to give a dilute agent vapor concentration of approximately 1 mg/liter.
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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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |