Patent ID: 6860632

Claim:
A holder for materials for use in a measuring instrument, said holder comprising: an intermediate housing member comprising: a generally horizontal member; an upper wall extending upwardly from an upper surface of the generally horizontal member, the upper wall defining a first recess adjacent the upper surface having a first diameter and a second recess adjacent the first recess having a second diameter, the second diameter being greater than the first diameter; and a lower wall extending downwardly from a lower surface of the generally horizontal member, the lower wall defining a third recess adjacent the lower surface having a third diameter and a fourth recess adjacent the third recess having a fourth diameter, the fourth diameter being greater than the third diameter; an upper housing member comprising a generally horizontal member and a wall extending upwardly from an upper surface of the generally horizontal member, the wall defining a material holding chamber, the upper housing member being seated within the second recess of the intermediate housing member; a lower housing member comprising a generally horizontal member, the lower housing member being seated within the fourth recess of the intermediate housing member; a first winding assembly disposed within a first cavity defined by the first recess, the generally horizontal member of the intermediate housing member and the generally horizontal member of the upper housing member; and a second winding assembly disposed within a second cavity defined by the third recess, the generally horizontal member of the intermediate housing member and the generally horizontal member of the lower housing member.