초록

An automatic flue damper positioned respectively to open and closed positions by means of motive apparatus, such as a solenoid motor, is provided with mechanical means for automatically latching the damper in its open position.

대표청구항 ▼

In a mechanism for positioning a damper member between respective positions opening and substantially closing a flue, said mechanism comprising motive means having an armature, means eccentrically linking said armature to a rotatable cam member drivingly engaged to said damper member, and yieldable

In a mechanism for positioning a damper member between respective positions opening and substantially closing a flue, said mechanism comprising motive means having an armature, means eccentrically linking said armature to a rotatable cam member drivingly engaged to said damper member, and yieldable means opposing movement of said armature in a first direction for returning said armature in an opposite direction upon de-energization of said motive means; the improvement wherein said cam member has first latching means, and including a latch member and means coupling said latch member to said armature, said latch member having second latching means cooperating with said first latching means to latch said cam member and therewith said damper member following movement of said armature in one of said directions, one of said latching means comprising a latching slot and the other of said latching means comprising a detent.