Rolamite sensor

An apparatus comprising

• a movable member;
• a base having a guide surface thereon defining a path for movement of said movable member, said movable member being movable along said guide surface from a first position to a second position due to a force acting on said movable member;
• a band of flexible, electrically conductive material at least partially encircling said movable member, said band extending in opposite directions away from said movable member along said guide surface;
• an electrically conductive member at a location spaced from said movable member and from said band when said movable member is in said first position and in the path of movement of said movable member, said band having a portion which contacts said conductive member to complete a circuit for electrical current through said conductive member and said band when said movable member is in said second position;
• a calibration tab projecting from said base and bendable relative to said base to at least partially define said first position of said movable member;
• and
• said base being made of sheet metal and said calibration tab being formed in one piece with said base and extending from said base and forming a backstop to block movement of said movable member in a first direction along said guide surface.

An apparatus comprising:

• a movable member;
• a base having a guide surface thereon defining a path for movement of said movable member, said movable member being movable along said guide surface from a first position to a second position due to a force acting on said movable member;
• a band of flexible electrically conductive material at least partially encircling said movable member, said band extending in opposite directions away from said movable member along said guide surface;
• an electrically conductive member at a location spaced from said movable member and from said band when said movable member is in said first position and in the path of movement of said movable member, said band having a portion which contacts said conductive member to complete a circuit for electrical current through said conductive member and said band when said movable member is in said second position;
• a calibration tab projecting from said base and bendable relative to said base to at least partially define said first position of said movable member;
• and
• wherein said base is made of sheet metal and said band is welded to said base at a location such that a force acting to pull said movable member and said band away from said base tensions said band and applies shear forces to said weld.

An apparatus comprising

• a movable member;
• a base having a guide surface thereon defining a path for movement of said movable member, said movable member being movable along said guide surface from a first position to a second position due to a force acting on said movable member;
• a band of flexible, electrically conductive material at least partially encircling said movable member, said band extending in opposite directions away from said movable member along said guide surface;
• an electrically conductive member at a location spaced from said movable member and from said band when said movable member is in said first position and in the path of movement of said movable member, said band having a portion which contacts said conductive member to complete a circuit for electrical current through said conductive member and said band when said movable member is in said second position;
• a calibration tab projecting from said base and bendable relative to said base to at least partially define said first position of said movable member;
• and
• a chassis to which said base is attached,
• said base comprising first and second base portions spaced from each other,
• said first base portion being spaced from said chassis and having said guide surface thereon facing away from said chassis and having means defining a first slot in said first base portion through which said conductive member extends into the path of movement of said movable member,
• said second base portion being fixed to said chassis and said band being secured to said second base portion,
• said base further comprising a curved third base portion connecting said first and second base portions at one end thereof, and a fourth base portion attached to the other end of said first base portion and fixed to said chassis.

An apparatus comprising:

• a movable member;
• a base having a guide surface thereon defining a path for movement of said movable member, said movable member being movable along said guide surface from a first position to a second position due to a force acting on said movable member;
• a band of flexible, electrically conductive material at least partially encircling said movable member, said band extending in opposite directions away from said movable member and having opposite ends welded to said base;
• and
• an electrically conductive member disposed in the path of movement of said movable member at a location spaced from said band when said movable member is in said first position,
• said band having a portion which contacts said conductive member to complete a circuit for electrical current to flow through said conductive member and said band when said movable member is in said second position.