Method of and apparatus for automatic damper control
First Claim
1. An automatic temperature responsive electrical damper control for operation of a damper in a solid fuel stove, comprisinga. a chassis having means for mounting of the chassis in a predetermined position with respect to and adjacent a chimney pipe from the solid fuel stove;
- b. an electric motor mounted to said chassis;
a damper drive connected to said motor and operatively connectable to a damper in said chimney pipe for position movement of the damper;
c. output means connected to said damper drive for indicating the position of the drive and the damper when operatively connected to said drive;
d. temperature responsive switching means for switching in response to a first higher temperature and a functionally discrete second lower temperature, said switch means being positionable in thermal exchange relationship with said chimney pipe;
e. selection means operatively connected to said output means and functionally disposed between said motor and said switch means for connecting said motor to be responsive only to switching as a consequence of only one of said temperatures; and
f. a power source lead connected to said selection means.
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Accused Products
Abstract
A method of and apparatus for automatic flue damper control of a solid fuel burning stove has a driveshaft connected to the damper, a plurality of cams on the driveshaft, a plurality of thermoswitches on the chimney pipe, a plurality of selection switches operated by the cams, and an electric motor controlled by the thermoswitches and the selector switches for moving the damper to open, partial and closed positions in response to low, rising, and too high temperatures respectively.
31 Citations
25 Claims
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1. An automatic temperature responsive electrical damper control for operation of a damper in a solid fuel stove, comprising
a. a chassis having means for mounting of the chassis in a predetermined position with respect to and adjacent a chimney pipe from the solid fuel stove; -
b. an electric motor mounted to said chassis;
a damper drive connected to said motor and operatively connectable to a damper in said chimney pipe for position movement of the damper;c. output means connected to said damper drive for indicating the position of the drive and the damper when operatively connected to said drive; d. temperature responsive switching means for switching in response to a first higher temperature and a functionally discrete second lower temperature, said switch means being positionable in thermal exchange relationship with said chimney pipe; e. selection means operatively connected to said output means and functionally disposed between said motor and said switch means for connecting said motor to be responsive only to switching as a consequence of only one of said temperatures; and f. a power source lead connected to said selection means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. In a solid fuel burning stove having a solid fuel burning chamber, an air inlet to the chamber, a chimney pipe extending upward from the burning chamber for exhaust of combustion product from the burning of solid fuel, and a damper in the chimney pipe, the improvement of an automatic temperature responsive damper control comprising
a. an electric motor; -
b. drive means operatively connecting the motor to said damper for movement of the damper between open and closed position; c. output means connected to said drive means for indicating the position of the damper as being open or closed; d. first and second temperature responsive switches having means positioned for sensing chimney temperature, said switches being self actuatable upon the sensing of a predetermined temperature, said first switch being self actuatable at a higher temperature than the second switch; e. selection means operatively connected to said output means and functionally disposed between said motor and said switches for selective switching electrical connection of the motor between said first and second switches and vice-versa in response to said output means indicating a change in position of the damper to open or closed; and f. a motive power lead connected to both said switches for energizing said motor to move said damper upon thermally responsive actuation of said switches to which the motor is electrically connected. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A method of automatically controlling a chimney damper, comprising the steps of:
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a. sensing the temperature of gases in a chimney having a damper therein; b. operating a lower temperature thermo-switch in response to sensing a low threshold temperature; c. connecting motive power to an electric damper drive motor and moving the damper to a fully open position in response to said operation of the low threshold temperature; d. dropping out the lower temperature switch and bringing in a higher temperature thermoswitch when the damper stops in the open position, and subsequently e. sensing a high threshold temperature and in response thereto operating a higher temperature thermo-switch and connecting motive power to the motor, f. moving the damper to a fully closed position, and g. dropping out the higher temperature switch and bringing back in the lower temperature switch when the damper stops in the closed position. - View Dependent Claims (23, 24, 25)
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Specification