Abstract Dual lever mechanisms especially well suited for use in a combination control device for gas burner apparatus having a reset operator, an electromagnetic holding device and a safety valve member, the dual lever mechanisms including a first lever having one arm actuated by the reset operator, a second arm engaging the magnet armature and a third arm spaced from the second arm and movable into engagement with a second lever for the safety valve member and pivoted in common with the first lever; lost motion is provided between the first and second levers such that the second lever is not engaged by the third arm of the first lever until the final movement of the reset operator whereupon the valve member is lifted from its seat a slight amount thereby permitting the pressure differential experienced across the valve to be balanced. A torsion spring for the second lever thereafter moves the second lever so as to fully open the safety valve.
A dual lever mechanism comprising in combination a first movable load, a second movable load, a movable operator, first lever means cooperating with said first load and said operator to transmit substantially full movement of said operator to said first load for full movement thereof, and second lever means cooperating with said first lever means and said second load to transmit only a terminal portion of the movement of said first lever means to said second load for partial movement thereof.
Claim 2
Dependent Claim
81 words
A dual lever mechanism comprising in combination a first movable load, a second movable load, a movable operator, first lever means cooperating with said first load and said operator to transmit substantially full movement of said operator to said first load for full movement thereof, and second lever means cooperating with said first lever means and said second load to transmit only a terminal portion of the movement of said first lever means to said second load for partial movement thereof.
Claim 3
Dependent Claim
20 words
The invention as recited in claim 2 wherein said first and second lever means are rotatable about a common axis.