Combustion trim control apparatus

Automatic temperature and humidity regulation – Furnace controlled – Furnace controlled responsive to combustion products...

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Details

74479, 431 12, F23N 500

Patent

active

047170719

ABSTRACT:
A modification of a basic jack-shaft control apparatus for a combustion system to provide a trim control. A first radial arm is mounted on a first rotating shaft which controls a fuel valve and a second radial arm is mounted on a second rotating shaft which controls an air damper. Ordinarily, a linking rod connects the radially outward ends of said first and second radial arms. The trim modification comprises attaching one end of a third radial arm to the radially outward end of either said first radial arm or said second radial arm. A third rotating shaft is attached to the third radial arm where it is attached to said first or second radial arm. The third radial arm rotates under the influence of trim control motor means on a plane transverse to the plane of rotation of the arm on which it is mounted. The linking rod connects the radially outward end of the third radial arm with the radially outward end of either said first or second radial arm to which the third radial arm is not otherwise attached.

REFERENCES:
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patent: 1849162 (1932-03-01), Wilhjelm et al.
patent: 2122683 (1938-07-01), Faverty
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patent: 3549089 (1970-12-01), Hamlett
patent: 4157238 (1979-06-01), Van Berkum
patent: 4249886 (1981-02-01), Bush
patent: 4264297 (1981-04-01), Van Berkum
patent: 4474549 (1984-10-01), Capone
patent: 4509912 (1985-04-01), Van Berkum
patent: 4649767 (1987-03-01), Banas

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