INSTRUMENTED TOKEN

• US 3,766,452 A
• Filed: 07/13/1972
• Issued: 10/16/1973
• Est. Priority Date: 07/13/1972
• Status: Expired due to Term

• Current Assignee: Charles D. Burpee, Donald A. Paynter, Lee E. Burpee
• Original Assignee: Charles D. Burpee, Donald A. Paynter, Lee E. Burpee
• Inventors: Burpee, Lee E., Burpee, Charles D., Paynter, Donald A.
• Primary Examiner(s): Duggan, D. F.
• Assistant Examiner(s): Moose, Jr., Harry E.
• Application Number:
  US05/271,456
• Time in Patent Office: 460 Days
• Field of Search: 317/DIG.2,262R 340/258R,258B,258C,280 199/9R,9C,9F
• US Class Current: 194/214
• CPC Class Codes: G06K 19/067 Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
• CPC Class Codes: G06K 19/0672 with resonating marks
• CPC Class Codes: G07F 1/06 Coins specially adapted to operate coin-freed mechanisms
• CPC Class Codes: G07F 7/086 by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer for security documents G07D7/00; for the reading of record-carriers in general G06K7/00; for the design of coded credit-cards G06K19/10
• CPC Class Codes: G08B 13/242 Tag deactivation
• CPC Class Codes: G08B 13/2445 Tag integrated into item to be protected, e.g. source tagging
• CPC Class Codes: G09F 3/00 Labels, tag tickets, or similar identification or indication means medals or badges A44C3/00; making labels B31D1/02; sheets temporarily attached together B42F; labelling B65C; labels on record carriers G11B23/38, G11B23/40; Seals; Postage or like stamps
• CPC Class Codes: Y10S 283/901 Concealed data
• CPC Class Codes: Y10S 283/904 Credit card

Abstract

Disclosed is an instrumented token or chip representative of value. Concealed within or on the surface of the token is a passive resonant circuit which responds to incident electromagnetic radiation in a preselected frequency to produce and radiate a unique detectable signal indicative of the token'"'"''"'"'s presence in the incident field.

Claims

1. An instrumented token comprising a body of dielectric material;

passive circuit means embedded within said body;

said passive circuit means comprising at least one turn of conductive material with the ends in juxtaposed spaced end on relation with each other and constituting an inductive element;

a discrete capacitance element electrically connected to and closing the gap between the ends of said turn of conductive material;

said passive circuit means comprising a resonant circuit responsive to incident electromagnetic radiation for producing a detectable change in such electromagnetic radiation outside of said body wherein said body of dielectric material comprises a disc with said passive circuit means embedded in the periphery thereof.

2. The combination in accordance with claim 1 wherein said passive circuit has a Q of at least 50.

3. The combination in accordance with claim 2 wherein said passive circuit has a Q of between 70 and 100.

4. The combination in accordance with claim 1 wherein said chip like body includes an edge groove and said passive circuit is positioned in said edge groove and is sealed therein.