Patent US4423818A successfully refreshed from Google Patents.
Patent US4046512A successfully refreshed from Google Patents.
US4046512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for indicating overheating in generators
Assignee: Westinghouse Electric Corp
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Filing: 1976-02-20
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Granted: 1977-09-06
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Expires: 1996-02-20
Abstract
Abstract The occurrence of excessively high temperatures in areas of a generator exposed to a cooling gas stream is visually indicated by passing a portion of the gas stream through an indicator device which comprises a filter holder containing a gas-permeable, particulate-collecting filter on which is an indicator which produces a visual effect when contacted by particulates. A valve controls the flow of the gas to the device and is opened by a monitor when the monitor detects particulates in the gas stream.
Inventors
- 👤 Thomas D. Kaczmarek
- 👤 David C. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:39
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2202; G01N1/2205; G01N2001/222; G01N2001/2223; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/200833; Y10T436/201666
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
In combination, A. a generator having a cooling gas stream passing therethrough; B. an indicator device for indicating the presence of particulates in said gas stream comprising 1. a filter holder having a gas inlet and a gas outlet, connected so that at least a portion of said cooling gas stream can pass therethrough; 2. a gas-permeable, particulate-collecting filter within said filter holder, the surface of said filter which faces said gas inlet being divided into at least two areas; and 3. at least two different chemical indicators, each on a different area of said filter, each chemical indicator producing a visual effect when contacted by particulates; and C. a valve between said generator and said cooling gas stream for controlling its flow through said indicator device, whereby particulates in said gas stream can collect on said filter producing a visual effect.
Claim 2
Dependent Claim
142 words
In combination, A. a generator having a cooling gas stream passing therethrough; B. an indicator device for indicating the presence of particulates in said gas stream comprising 1. a filter holder having a gas inlet and a gas outlet, connected so that at least a portion of said cooling gas stream can pass therethrough; 2. a gas-permeable, particulate-collecting filter within said filter holder, the surface of said filter which faces said gas inlet being divided into at least two areas; and 3. at least two different chemical indicators, each on a different area of said filter, each chemical indicator producing a visual effect when contacted by particulates; and C. a valve between said generator and said cooling gas stream for controlling its flow through said indicator device, whereby particulates in said gas stream can collect on said filter producing a visual effect.
Claim 3
Dependent Claim
26 words
A combination according to claim 1 wherein said filter holder is provided with a window whereby said visual effect can be observed without disassembling said device.
Claim 4
Dependent Claim
19 words
A combination according to claim 1 wherein said areas are separated from each other by an indicator impermeable barrier.
Claim 5
Dependent Claim
11 words
A combination according to claim 1 wherein said areas are pie-shaped.
Claim 6
Dependent Claim
16 words
A combination according to claim 1 wherein the number of said areas is 2 to 6.
Claim 7
Dependent Claim
29 words
A combination according to claim 1 including a monitor, which monitors said gas stream for the presence of particulates therein and opens said valve when said particulates are detected.
Claim 8
Dependent Claim
29 words
A combination according to claim 1 including a second filter which removes particles larger than 10μm from said gas stream before said gas stream passes through said particulate-collecting filter.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |