Patent ID: 7197352

Claim:
A mounting arrangement for a magnetoencephalography system headrest assembly forming a portion of a SQUID dewar and having a fixed headrest and an array of sensors, comprising: a sensor array plate for positioning the sensors relative to the headrest; an intermediate moveable mounting member; a plurality of first rods interconnecting said array plate and said moveable mounting member, each one of said rods being composed of material expandable and contractible with changes in temperature; and a plurality of second rods fixed at one of their ends relative to the dewar and being connected at their opposite ends to said moveable mounting member, said second rods being composed of said material; whereby said moveable mounting member tends to be moved in one direction toward or away from said sensor array plate, and tends to be moved in an opposite direction away from or toward said array plate resulting in temperature changes affecting the first and second rods, so that said sensor array plate and its sensors maintain a substantially constant spacing between said sensors and said headrest with changes in temperature.