Reagent strip calibration system

• US 5,160,278 A
• Filed: 10/22/1990
• Issued: 11/03/1992
• Est. Priority Date: 10/22/1990
• Status: Expired due to Fees

• Current Assignee: Miles, Inc. (Bayer AG)
• Original Assignee: Miles, Inc. (Bayer AG)
• Inventors: Johnson, Larry D.
• Primary Examiner(s): MCGLYNN, JOSEPH
• Application Number:
  US07/600,906
• Time in Patent Office: 743 Days
• Field of Search: 439/86, 439/90, 439/91, 439/197, 439/493, 439/586, 439/592, 439/593
• US Class Current: 439/593
• CPC Class Codes: H01R 12/714 with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit
• CPC Class Codes: H01R 12/82 connected with low or zero insertion force

Abstract

A reagent strip calibration system utilizes an electrical connection system particularly usable for making electrical connections to one-time use devices such as reagent strips. The connection employs a plurality of U-shaped contacts fabricated from a hard metal wire such as tungsten, beryllium copper or a nickel/iron alloy that is self-supporting or supported by an elastomer that also provides contact pressure between the wire and the one-time use device while providing low insertion force. Such a connection system is particularly suitable for use with a system for analyzing the chemical properties of an analyte that is placed on a reagent strip. The manner in which the chemical properties of the reagent strip are to be analyzed are defined by areas of different resistance disposed on the reagent strip and contacted by the U-shaped contacts to permit measurement of the resistance of the various areas to obtain the information needed to define the properties of the reagent strip.

Claims

1. A reagent strip calibration system comprising

a) a one-time use reagent strip having areas of differing resistance, and

b) a connector usable for contacting said one-time use reagent strip by physical displacement composed of

a base,

an elongated resilient member disposed on said base,

a plurality of generally U-shaped, nonresilient, hard, electrically conductive wires disposed in a substantially parallel relationship about said elongated elastomeric member and supported thereby, and

means defining a completely open cavity adjacent said conductive wires for receiving said one-time use reagent strip, said cavity being dimensioned so that said one-time use reagent strip compresses said nonresilient, hard, electrically conductive wires when the one-time use reagent strip is inserted into said cavity causing said wires to become biased against said one-time use reagent strip.

2. The reagent strip calibration system of claim 1 wherein said nonresilient, hard, electrically conductive wires are composed of tungsten.

3. The reagent strip calibration system of claim 1 wherein said nonresilient, hard, electrically conductive wires are composed of beryllium copper.

4. The reagent strip calibration system of claim 1 wherein said nonresilient, hard, electrically conductive wires are compose of nickel/iron alloy.

5. The reagent strip calibration system of claim 1 wherein said elongated elastomeric member is fabricated from butadiene rubber.

6. The reagent strip calibration system of claim 1 wherein said elongated elastomeric member is fabricated from butyl rubber.

7. The reagent strip calibration system of claim 1 wherein said elongated elastomeric member is fabricated from polychloroprene.

8. The reagent strip calibration system of claim 1 wherein said elongated elastomeric member is fabricated from natural rubber.