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US 3,934,796 AGranted
Heating system with fuel saving draft retarder
OwnerPaul E. Smith, Jr., Lloyd D. Chilcottinventors
Life of this patent
Estimating the term…
Abstract
A damper, normally biased closed, in a flue of a heating system has an arm which is connected by linkage to an armature of a solenoid for opening the damper when a winding of the solenoid is energized by a heating system control. Switch means, engaged by the arm, is interposed between the heating system control and burner facilities of the heating system for preventing operation of the burner facilities when the damper is closed and for allowing operation of the burner facilities when the damper is open.
Claims8
A fuel saving draft retarder for a heating system comprising
- a flue section;
- a damper mounted in the flue section;
- a support on the flue section;
- an arm on the damper rotatable in front of the support for opening and closing the damper;
- a solenoid mounted on the support and having an armature and a heating system energizable winding;
- linkage means connecting the solenoid to the arm for rotating the arm to open the damper when the winding is energized;
- means for biasing the damper closed;
- heating system control switch means mounted on the support for being engaged and operated by the arm when the damper is open;
- a dashpot having an operating rod and spring means normally biasing the operating rod in an extended position;
- means for mounting the dashpot on the support such that the operating rod is engaged and depressed by the arm when the arm is rotated to close the damper;
- said linkage means including a rod, an eyelet on one end of the rod, a pin pivotally securing the eyelet to the armature of the solenoid, and head means on the other end of the rod;
- and
- said arm having an opening slidably receiving the rod such that the head means engages the arm to rotate the arm to open the damper.
10 more elements
A heating system including
- means for burning fuel,
- fuel control means responsive to electrical energization for controlling a flow of fuel to the burning means,
- said burning means including an exhaust stack for combustion products of the burning means,
- a one-way air intake valve means for drawing air into the exhaust stack when a draft is being pulled in the exhaust stack and for closing when stack pressure exceeds room pressure,
- damper means in the stack past the one-way air intake valve means for opening and closing the stack,
- thermostat means for sensing temperature,
- primary burner electrical control means operated by the thermostat means for energizing the fuel control means when the sensed temperature is below a selected temperature and for deenergizing the fuel control means when the sensed temperature is above the selected temperature,
- means responsive to the primary burner control means for opening the damper means when the primary burner control means is energized and for closing the damper means when the primary burner control means is deenergized, and
- switch means operated by the damper opening and closing means and interposed between the primary burner control means and fuel control means for allowing operation of the fuel control means only when the damper means is open.
6 more elements
Dependencies are inferred from the claim text.