A lock mechanism including a lock gear lever movable between unlocked, locked and superlocked positions, the lock lever being connected to further components of the lock mechanism to provide for corresponding unlocked, locked and superlocked conditions of the lock mechanism, the lock lever being operably movable between the unlocked, locked and superlocked positions by a stepper motor. When the rate of the packet of variable rate data exceeds the capacity of the traffic channel, the packet is transmitted on a traffic channel and at least one overflow channel. The first fluid passageway has a patient end remote from the housing. Location of the target with respect to the texture is a function of a serial number or other information about the object. By the transitional point at which energy varies abruptly and the time-separated coding based on the transitional point, more improved speech quality than in the general harmonic speech coder can be obtained using the time-separated speech coder by increasing the representation capability of the transitional signal with large energy variation, after adapting it to the variable transitional point.