Emission sensor

Claim 2

An exhaust gas emission sensor comprising: separate hollow body members joined at their peripheries to form a housing; two containers within said housing having materials therein with the material in one conTainer including an active catalyst; means in said housing adapted to connect the two containers to an exhaust gas source allowing the exhaust gas to pass through the materials in said containers, bimetal members in fixed relationship to each other having contacts thereon attached to each of said containers; one of said contacts being connected to a remote indicator; whereby upon said exhaust gas reaching an undesirable level of pollutants, the material that includes the catalyst reacts, to cause a greater heat transfer to said bimetal member attached thereto to unbalance the fixed relationship between the bimetal members wherein the contacts close to provide a signal to a remote indicator.

Claim 3

An exhaust gas emission sensor comprising: two body members that are held together by peripheral flanges to form a hollow enclosed housing; a pair of containers within said housing; secured on each of said respective containers are bimetal arms having contacts with one of said contacts being connected to a remote indicator; each of said containers being connected to a vacuum source at one end and an exhaust gas source at the other end through pipe means; said pipe means extend through orifices in the top and bottom respectively of said containers and said housing; one of said containers having material therein that includes an active catalyst, with the other container having similar material therein without the catalyst, whereby upon the exhaust gas passing through the containers and by the vacuum source reaching an undesirable level of pollutants, said material containing the active catalyst will be ignited thereby creating a greater heat transfer through said container to said bimetal arm attached thereto, to heat said bimetal arm to thereby create an unbalance in said arms, causing the contact means to close to provide a signal to the remote indicator.

Claim 4

An exhaust gas emission sensor comprising: two body members that are held together by peripheral flanges to form a hollow enclosed housing; a pair of containers within said housing; secured on each of said respective containers are bimetal arms having contacts with one of said contacts being connected to a remote indicator; each of said containers being connected to a vacuum source at one end and an exhaust gas source at the other end through pipe means; said pipe means extend through orifices in the top and bottom respectively of said containers and said housing; one of said containers having material therein that includes an active catalyst, with the other container having similar material therein without the catalyst, whereby upon the exhaust gas passing through the containers and by the vacuum source reaching an undesirable level of pollutants, said material containing the active catalyst will be ignited thereby creating a greater heat transfer through said container to said bimetal arm attached thereto, to heat said bimetal arm to thereby create an unbalance in said arms, causing the contact means to close to provide a signal to the remote indicator.

Claim 5

An exhaust gas emission sensor comprising: two hollow body members having peripheral flanges thereon and being secured together at the peripheral flanges to form a hollow enclosed housing; a pair of container means within said housing; bimetal arms having contacts thereon within a cavity in said housing and being attached to each of said respective container means, one of said contacts being electrically connected to an indicator; insulation within said housing surrounding said container means to prevent heat loss therefrom; each of said container means being connected to a vacuum source at one end thereof to draw exhaust gas through the containers and interconnected to each other and to an exhaust gas source at the other end through pipe means; the vacuum source and pipe means extend through orifices in the top and bottom respectively of each of said containers and said housing; one of said container means including a material having an active catalyst, and the other one of said container means containing a material without the catalyst; whereby when said exhaust gas passing through said sensor reaches an undesirable level of CO and hydrocarbons said material containing the active catalyst will be ignited thereby creating a greater heat transfer through said container to said bimetal arm attached thereto, to heat said bimetal arm a greater amount than the bimetal arm attached to the other container to create an unbalance in said arms, causing the contact means to close to provide a signal to an indicator.

Claim 6

An exhaust gas emission sensor comprising: two hollow body members having peripheral flanges thereon and being secured together at the peripheral flanges to form a hollow enclosed housing; a pair of container means within said housing; bimetal arms having contacts thereon within a cavity in said housing and being attached to each of said respective container means, one of said contacts being electrically connected to an indicator; insulation within said housing surrounding said container means to prevent heat loss therefrom; each of said container means being connected to a vacuum source at one end thereof to draw exhaust gas through the containers and interconnected to each other and to an exhaust gas source at the other end through pipe means; the vacuum source and pipe means extend through orifices in the top and bottom respectively of each of said containers and said housing; one of said container means including a material having an active catalyst, and the other one of said container means containing a material without the catalyst; whereby when said exhaust gas passing through said sensor reaches an undesirable level of CO and hydrocarbons said material containing the active catalyst will be ignited thereby creating a greater heat transfer through said container to said bimetal arm attached thereto, to heat said bimetal arm a greater amount than the bimetal arm attached to the other container to create an unbalance in said arms, causing the contact means to close to provide a signal to an indicator.

Claim 7

An exhaust gas emission sensor as set forth in claim 3, wherein said containers include adjustment means to permit adjustment of the exhaust gas flow therethrough.

Claim 8

An exhaust gas emission sensor as set forth in claim 4 wherein said containers are connected to the exhaust gas by an inlet pipe into said housing and are interconnected through a cross pipe having an orifice therein that is attached to said inlet pipe.

Claim 9

An exhaust gas emission sensor as set forth in claim 5 wherein said containers each include screen means separated from each other to retain the material in said containers.