Patent ID: 8022691
Filing Date: 2011-09-20
Classification: G01D

Abstract:
1. A device, comprising a housing holding a sensor, said housing having an inner surface, said inner surface having an inner-surface-inside dimension, said sensor including a coil and a captive core, wherein said coil has a coil inside diameter, wherein an electrical measurement of said coil provides information about at least one from the group including displacement of said captive core and velocity of said captive core, further wherein said coil has an axis extending in a first direction, wherein said housing has a minimum outside dimension that is less than 3.00 mm when measured perpendicular to said first direction, wherein said housing further comprises a support for said captive core, wherein said housing inner-surface-inside dimension is greater than said coil inside diameter, wherein said support includes a first bearing and a second bearing, wherein said captive core has a stroke length, wherein said captive core has a first length of contact with said first bearing, wherein said captive core has a second length of contact with said second bearing, wherein said first length of contact is less than said stroke length and wherein said second length of contact is less than said stroke length, wherein said second bearing has a second-bearing-outside diameter that is greater than said coil inside diameter.