US3786462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon monoxide alarm for automobiles
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1971-11-24
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Granted: 1974-01-15
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Expires: 1991-11-24
Abstract
Abstract A carbon monoxide alarm device for installation in an automobile in which a vented casing contains a fuel cell having first and second electrodes in fixed space relationship within a porous body having an oxidation catalyst and is connectable by three terminals to chassis ground, the ignition circuit and to a load, the same being insertable into a mounting at a suitable location in the automobile to give a warning by actuation of the load, the latter being in the form of an electrical buzzer or lamp or both and located internally or externally of the casing.
Inventors
- 👤 R Hayden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:28
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4073; G01N27/4074; B; B60; B60H; B60H1/00; B60H1/00642; B60H1/00735; B60H1/008; B60H3/00; B60H3/0085; G01N27/4067; G08; G08B; G08B17/00; G08B17/10; G08B17/117; H; H01; H01M; H01M8/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
An alarm device according to claim 1 additionally including a ''''Davey'''' screen mounted in said casing and surrounding said fuel cell.
Claim 2
Dependent Claim
34 words
An alarm device according to claim 1 wherein said load is a lamp mounted in said casing so as to be exposed to operator view when said socket is secured to a vehicle support.
Claim 3
Dependent Claim
19 words
An alarm device according to claim 1 wherein said first electrode in said fuel cell is a heating element.
Claim 4
Dependent Claim
36 words
An alarm device according to claim 4 wherein said fuel cell includes a body of porous material of a refractory nature surrounding said electrodes of said cell, said body having a layer of catalytic material thereon.
References Cited (Backward Citations)
US3609732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |