Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1995-07-21
1997-05-06
Martin, David S.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
395283, 439188, 439439, H01H 3500
Patent
active
056274165
ABSTRACT:
An electronic device has a host with a card-receiving slot, and can receive and operate with both low voltage (3 volts) and high voltage (5 volts) IC (integrated circuit) cards. The inner end of the slot has a voltage-discriminating first side, and has a switch (82, FIG. 5) with an actuator (80) lying at a location that is occupied by a discrimination key portion (69) that is present in a low voltage card but not a high voltage card. The electronic device has both lower and higher voltage circuits (124, 130) for energizing lower and higher voltage cards, and the type of card sensed by the switch determines which circuit is connected to contacts at the inner end of the slot.
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ITT Corporation
Lockett Kim
Martin David S.
Peterson Thomas L.
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