Patent ID: 8018696
Filing Date: 2011-09-13
Classification: F02K,F05D

Abstract:
1. A tertiary lock system power unit for supplying a DC tertiary lock control signal to an electromechanical tertiary lock assembly, comprising: a step-down transformer adapted to receive a tertiary lock release command signal, the tertiary lock release command signal being an AC signal of a first peak voltage magnitude, the step-down transformer operable, upon receipt of the tertiary lock release command signal, to supply an AC signal of a second peak voltage magnitude, the second peak voltage magnitude being less than the first peak voltage magnitude; a rectifier circuit coupled to receive the AC signal of the second peak voltage magnitude from the step-down transformer and configured, upon receipt thereof, to supply a DC signal of a third voltage magnitude; and a voltage limiting circuit coupled to receive the DC signal of the third voltage magnitude from the rectifier circuit and operable, upon receipt thereof, to supply the DC tertiary lock control signal to the electromechanical tertiary lock assembly at a fourth voltage magnitude, the fourth voltage magnitude less than or equal to a predetermined voltage limit, the voltage limiting circuit comprising: