Patent ID: 6857500
Filing Date: 2005-02-22
Classification: G01L

Abstract:
1. A differential angular displacement sensing apparatus comprising: a shaft including a primary shaft coaxially connected to a secondary shaft; a first substrate operably coaxially coupled to said primary shaft, said first substrate oriented substantially perpendicular to an axis defining said shaft; a second substrate operably coaxially coupled to said secondary shaft, said second substrate oriented substantially perpendicular to said axis defining said shaft, said first and second substrates each having an aperture therethrough configured to receive an alignment pin therethrough, said first and second substrates being substantially parallel to each other defining an electrical interface therebetween, said electrical interface configured to generate a signal indicative of an amount of torque applied to said shaft; and a housing configured to enclose said first and second substrates having said electrical interface therebetween, wherein said housing includes an alignment aperture therethrough positioned to align with said apertures of said first and second substrates having said alignment pin therethrough and extending outside of said housing, said alignment aperture configured to limit contact of said alignment pin with edges defining said alignment aperture in said housing while allowing said alignment pin to align said apertures of said first and second substrates with said alignment aperture.