Patent ID: 6208044
Filing Date: 2001-03-27
Classification: G06K,H05K

Abstract:
A memory wire control system used to eject a removable medium from a housing, said memory wire control system comprising:an elongated memory wire having a first end and a second end and an intrinsic electrical resistance; anda pulse width modulator having a first output coupled to a first coupling location of said memory wire that is more proximate said first end than said second end and a second output coupled to a second coupling location of said wire that is more proximate to said second end than said first end, said pulse width modulator being operative to provide a pulse width modulated current to said memory wire, thereby causing said memory wire to heat due to said intrinsic electrical resistance and consequently causing said memory wire to contract between said first coupling portion and said second coupling portion due to said heating, whereby when said memory wire is caused to contract, said removable medium is caused to ejected from said housing.