Smart key system

• US 5,157,244 A
• Filed: 12/19/1989
• Issued: 10/20/1992
• Est. Priority Date: 12/19/1989
• Status: Expired due to Fees

• Current Assignee: The Whitaker Corporation (Meggitt PLC)
• Original Assignee: AMP Incorporated (Johnson Controls International plc)
• Inventors: Mroczkowski, Robert S., Ritchie, Leon T.
• Primary Examiner(s): Shepperd, John W.
• Assistant Examiner(s): GLEMBOCKI, CHRISTOPHE
• Application Number:
  US07/452,179
• Time in Patent Office: 1,036 Days
• Field of Search: 235/441, 235/492, 235/493, 235/449, 235/451, 235/380, 439/676, 439/68, 439/59, 361/399
• US Class Current: 235/441
• CPC Class Codes: G06K 13/0893 the arrangement comprising means for cleaning the card upon insertion
• CPC Class Codes: G06K 19/04 characterised by the shape
• CPC Class Codes: G06K 7/0047 for reading/sensing record carriers having edge contacts
• CPC Class Codes: G07C 9/00944 Details of construction or manufacture

Abstract

A system for handling variable digital information comprising a key having an active integrated circuit component with leads extending therefrom, a battery for powering the component, unplated leads extending from the component to both the battery and to one edge of the key, and a container for sealing the component, battery and leads except at the edge of the container; and a receptacle having a plurality of unplated leads couplable at their inboard ends to electronic machinery and couplable at their outboard ends to the leads at the edge of the container.

Claims

1. A system for handling variable digital information comprising:

a key having a leading edge at one end thereof and a longitudinal axis along the length thereof, an active integrated circuit component, a DC battery for powering the component, leads extending between the component and the battery, unplated leads fabricated of an alloy containing at least 93 percent copper and including male contacts extending from the component parallel with the axis, the male contacts having upper contact surfaces located in a plane of contact, the unplated leads being down turned at the leading edge of the key;

a container for sealing the component, battery and leads except adjacent to the leading edge of the key;

a receptacle having a longitudinal axis along the length thereof parallel with the axis of the key, the receptacle also having plurality of unplated leads with inboard portions couplable to electronic machinery and with outboard portions having lower contact surfaces slidingly, resiliently contactable with the upper contact surfaces of the unplated leads of the key adjacent to the leading edge of the key; and

resilient means adjacent to the outboard portions to urge the lower contact surfaces of the receptacle downwardly toward the plane of contact into sliding, resilient contact with the upper contact surfaces of the key whereby, when the key is moved along its axis into sliding contact with the leading portions of the receptacle, high normal forces are generated therebetween to break corrosion existing on the contacting surfaces thereof.

2. The system as set forth in claim 1 wherein the edge leads of the key, as well as the contacts between the battery and the component, are in a common plane.

3. The system as set forth in claim 1 wherein the alloy includes aluminum, silicon and cobalt.

4. The system as set forth in claim 3 wherein the leads of both the key and receptacle are fabricated of an alloy containing at least 93.0% copper, 2.5 to 3.5% aluminum, 1.5 to 2.1% silicon and 2.5 to 0.55% cobalt.

5. The system as set forth in claim 1 wherein the high normal forces are at least about 200 grams.

6. A system for handling variable digital information comprising:

a key having a leading edge at one end thereof and a longitudinal axis along the length thereof, an active integrated circuit component, a DC battery for powering the component, leads extending between the component and the battery, unplated leads including male contacts extending from the component parallel with the axis, the male contacts having upper contact surfaces located in a plane of contact, the unplated leads being down turned at the leading edge of the key;

a container for sealing the component, battery and leads except adjacent to the leading edge of the key;

a receptacle having a longitudinal axis along the length thereof parallel with the axis of the key, the receptacle also having plurality of unplated leads with inboard portions couplable to electronic machinery and with outboard portions having lower contact surfaces slidingly, resiliently contactable with the upper contact surfaces of the unplated leads of the key adjacent to the leading edge of the key; and

resilient means in the form of a block positioned in contact with the sides of the outboard portions remote from the leads of the key to urge the lower contact surfaces of the receptacle downwardly toward the plane of contact into sliding, resilient contact with the upper contact surfaces of the key whereby, when the key is moved along its axis into sliding contact with the leading portions of the receptacle, high normal forces are generated therebetween to break corrosion existing on the contacting surfaces thereof.

7. The system as set forth in claim 6 wherein the leads of the receptacle are of a solid, resilient, copper-based alloy which exhibits self-limiting corrosion, unplated at their ends.

8. A system for handling variable digital information comprising:

a key having a leading edge at one end thereof and a longitudinal axis along the length thereof, an active integrated circuit component, a DC battery for powering the component, leads extending between the component and the battery, unplated leads including male contacts extending from the component parallel with the axis, the male contacts having upper contact surfaces located in a plane of contact, the unplated leads being down turned at the leading edge of the key with one of the unplated leads extending forwardly of others of the unplated leads for the initial grounding of the card;

a container for sealing the component, battery and leads except adjacent to the leading edge of the key;

a receptacle having a longitudinal axis along the length thereof parallel with the axis of the key, the receptacle also having a plurality of unplated leads with inboard portions couplable to electronic machinery and with outboard portions having lower contact surfaces slidingly, resiliently contactable with the upper contact surfaces of the unplated leads of the key adjacent to the leading edge of the key; and

resilient means adjacent to the outboard portions to urge the lower contact surfaces of the receptacle downwardly toward the plane of contact into sliding, resilient contact with the upper contact surfaces of the key whereby, when the key is moved along its axis into sliding contact with the leading portions of the receptacle, high normal forces are generated therebetween to break corrosion existing on the contacting surfaces thereof.