Claims
- 1. A system for operating apparatus utilizing a combustible gas comprising means for emitting radiant heat, means connected in circuit relation with said emitting means for supplying the combustible gas thereto to be ignited, and means for controlling the circuit relation of said emitting means so as to selectively effect energization of said emitting means and said supplying means, a pair of metallic strips each having a portion thereof respectively interconnected, means for pivotally mounting said strips spaced from said interconnected portions thereof and disposed with said strips so as to separate them, one of said strips being shielded at least in part with respect to the heat generated by said emitting means and said supplying means upon the energization thereof while the other of said strips is subjected to the heat so as to effect elongation of said other strip with respect to said one strip and pivotal movement of said interconnected portions of said strips generally about the pivotally mounting means, and means disposed between at least one of said one and other strips and said controlling means for driving it to a circuit controlling position respectively deenergizing said emitting means and energizing said supplying means so that the combustible gas from said supplying means is ignited by the remaining radiant heat of said emitting means.
- 2. A system as set forth in claim 1 further comprising condition responsive means operable generally upon the occurrence of a preselected condition for placing said emitting means, said supplying means and said controlling means across a power source.
- 3. A system as set forth in claim 1 wherein said controlling means is disposed in shunt circuit relation with said supplying means and in series circuit relation with said emitting means.
- 4. A system as set forth in claim 1, wherein said controlling means in a generally at-rest circuit controlling position thereof is operable generally upon the application of power thereto to shunt said supplying means and energize said emitting means.
- 5. A system for operating apparatus utilizing a combustible gas comprising a heat source including means energized upon the application of power thereto for emitting radiant heat, and means energized upon the application of power thereto for supplying a flow of the gas adapted to be ignited by the radiant heat of said emitting means, means connected in shunt circuit relation across said supplying means for controlling the energization of both said emitting means and said supplying means including means for applying power to said emitting means to effect the energization thereof and its emission of the radiant heat upon the occurrence of a preselected condition and movable toward a position for interrupting the application of power to said emitting means, a pair of generally elongate metallic strips each having a portion thereof respectively interconnected, means spaced from said interconnected portions of said strips for separating them, means for mounting at least said separating means so that said strips are pivotally movable relative thereto and wherein one of said strips is subjected to said heat source while shielding at least in part the other of said strips from said heat source, said one strip being elongatable upon the subjection thereof to said heat source with respect to said shielded other strip thereby to effect the pivotal movement of said strips, and means between at least one of said one and other strips and said applying means for effecting movement thereof toward its position interrupting the application of power to said emitting means to effect the de-energization thereof and establishing the application of power to said supplying means to effect the energization thereof and the flow of the gas for ignition by the remaining radiant heat of said emitting means.
- 6. A method of actuating means for detecting radiant heat from a source thereof, the detecting means having a pair of metallic strips with adjacent oppositely spaced portions thereof interconnected, the method comprising the steps of:
- (a) shielding at least a part of one of the strips from the radiant heat source while subjecting the other of the strips thereto for effecting relative elongation of the strips and causing one of the interconnected adjacent oppositely spaced portions of the strips to pivot relative to the other of the interconnected adjacent oppositely spaced portions thereof; and
- (b) effecting the movement of means toward at least one position for controlling an electrical circuit in response to the pivotal movement of the strips.
- 7. The method as set forth in claim 6 wherein the shielding and causing step comprises disposing the strips generally in overlaying relation with each other.
- 8. The method as set forth in claim 6 wherein at least one of the strips includes means for enhancing the pivotal movement thereof.
- 9. The method as set forth in claim 6 wherein the shielding and causing step comprises supporting the other interconnected adjacent oppositely spaced portions to effect the pivoting of the one interconnected adjacent oppositely spaced portions relative thereto.
- 10. The method as set forth in claim 6 wherein the strips include means for separating the strips interconnected between the other adjacent oppositely spaced portion of the strips so that the strips are arranged in a generally triangular configuration, and wherein the shielding and causing step comprises arranging the separating means so that the at least part of the one strip is shielded from the radiant heat source.
- 11. The method as set forth in claim 10 wherein the shielding and causing step further comprises mounting the separating means within the detecting means so that the separating means and the strips generally define a truss having the generally triangular configuration.
- 12. The method as set forth in claim 6 wherein the movement effecting step comprises interrupting the application of power through the electrical circuit to deenergize means for emitting radiant heat upon the movement of the controlling means to its one circuit controlling position.
- 13. The method as set forth in claim 12 comprising the additional step of applying power to energize a means for supplying a combustible gas adapted to be ignited by the remaining radiant heat of the emitting means generally upon the deenergization thereof.
- 14. The method as set forth in claim 6 wherein the electrical circuit includes means adapted to be energized for emitting radiant heat and means adapted to be energized for supplying a flow of combustible gas for ignition by the radiant heat of the emitting means, and wherein the effecting step includes energizing the supplying means so as to flow the combustible gas to the emitting means and deenergizing the emitting means so that the gas flowed thereto is ignited by at least the remaining radiant heat of the emitting means when the controlling means is in its one circuit controlling position.
- 15. A method of actuating a pair of elongate strips respectively having a pair of adjacent opposite portions interconnected in a generally triangularly shaped truss mounted for pivotal movement in means for detecting radiant heat from a source thereof, said method comprising shielding at least in part one of the strips from the radiant heat while subjecting the other of the strips thereto so as to effect elongation of the other strip with respect to the one strip cause one of the pair of adjacent opposite portions of the strip to pivot generally about the other pair of adjacent opposite end portions of the strips.
- 16. The method as set forth in claim 15 comprising the additional step of driving a means for controlling an electrical circuit in response to the pivoting of the one pair of adjacent opposite portions of the strip.
- 17. The method as set forth in claim 16 comprising the further additional step of controlling the energization of means connected in circuit relation with the controlling means and operable generally for emitting radiant heat in response to the driving of the controlling means.
- 18. The method as set forth in claim 17 wherein the further additional step includes energizing a means connected in circuit relation with the controlling means and the radiant heat emitting means and operable generally for supplying a combustible gas to the radiant heat emitting means so as to be ignited thereby.
- 19. The method as set forth in claim 15 comprising the additional step of operating switch means in response to the pivoting of the one pair of adjacent opposite portions of the strip so as to deenergize means for emitting radiant heat and energizing a means for supplying a combustible gas to the radiant heat emitting means so as to be ignited by at least the remaining radiant heat thereof.
- 20. In a detector for radiant heat having a housing, means in the housing for admitting the radiant heat, a pair of elongate metallic strips disposed in the housing at least in part in overlaying relations and having adjacent portions thereof interconnected, and means mounted to the housing and spaced from the interconnected adjacent portions of the strips for interconnecting and separating the strip; a method of actuating the strips in response to the radiant heat admitted into the housing through the admitting means comprising shielding at least in part one of the strips from the radiant heat while subjecting the other of the strips thereto so as to effect elongation of the other strip with respect to the one strip and causing the interconnected adjacent portions of the strips to pivot generally about the interconnecting and separating means.
- 21. The method as set forth in claim 20 comprising the additional step of moving a means for controlling an electrical circuit toward at least one circuit controlling position thereof in response to the pivotal movement of the strips in one of a pair of opposite pivotal directions generally about the interconnecting and separating means.
- 22. The method as set forth in claim 21 comprising the further additional step of effecting the deenergization of means in the electrical circuit for emitting the radiant heat when the controlling means is in its at least one circuit controlling position.
- 23. The method as set forth in claim 22 wherein the further additional step comprises causing the energization of means in the electrical circuit for supplying a combustible gas to the emitting means so as to be ignited thereby when the controlling means is in its at least one circuit controlling position.
- 24. The method as set forth in claim 21 wherein the additional step comprises driving a means interposed between at least one of the one and other strips and the controlling means upon the pivotal movement of the strips in the one direction so as to effect the movement of the controlling means toward its at least one circuit controlling position.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a division of U.S. patent application Ser. No. 463,299 filed Apr. 23, 1974 (now U.S. Pat. No. 3,968,469 issued July 6, 1976) which is incorporated herein by reference.
US Referenced Citations (6)
Divisions (1)
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Number |
Date |
Country |
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463299 |
Apr 1974 |
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