Patent ID: 7542306

Claim:
An apparatus comprising: a chassis including a first electronic circuit board with a first connector, chassis flex circuitry with a disengageable contacts, a controller in communication with the chassis flex circuitry, and a power supply in communication with the controller and the first electronic circuit board; and a cassette selectively securable to the chassis, the cassette including a second electronic circuit board with a second connector, and a cassette handle with cassette flex circuitry that includes a switch and disengageable contacts, wherein securing the cassette to the chassis positions the disengageable contacts of the cassette flex circuitry in engagement with the disengageable contacts of the chassis flex circuitry to form a circuit and positions the first connector in electronic communication with the second connector, and wherein the circuit allows the controller to detect the condition of the switch; and a switch trigger on the cassette handle to actuate the switch; and wherein the switch trigger selectively locks or unlocks the cassette to the chassis.