A method and apparatus for testing roll together of a mattress using two weights, preferably weighted cylinders, and moving one of the weights towards the other while measuring change in distance between the weights and changes in angle of the stationary weight.

A method and apparatus for testing roll together of a mattress using two weights, preferably weighted cylinders, and moving one of the weights towards the other while measuring change in distance between the weights and changes in angle of the stationary weight.

Disclosed are an apparatus for measuring a position of a probe for an inclinometer, and a probe. The apparatus for measuring a position of a probe for an inclinometer comprises: a probe connection unit; a cable connection unit; a storage unit; a power supply unit; a magnetic field generator; a rotational number calculation unit, and a probe position calculation unit.

Disclosed are an apparatus for measuring a position of a probe for an inclinometer, and a probe. The apparatus for measuring a position of a probe for an inclinometer comprises: a probe connection unit; a cable connection unit; a storage unit; a power supply unit; a magnetic field generator; a rotational number calculation unit, and a probe position calculation unit.

An electromagnetic angle sensing structure comprises a front cover with a display module electrically connected to a control circuit with a sensing module provided with a sensing area formed by at least one sensing coil, the circuit comprises a sensing control unit generating an electromagnetic variable quantity and a central processing module receiving the variable quantity and storing an angle data; and an inner assembly body with a front side formed with a curvature guide rail, being filled with a liquid and disposed with a metal ball displacing in the guide rail, an electromagnetic field generated by the coil generates changes in an inductance value due to the ball passing through, the sensing control unit generates the variable quantity being transmitted to the central processing module, an angle information converted by the central processing module through the variable quantity and the angle data is displayed on the display module.

An electromagnetic angle sensing structure comprises a front cover with a display module electrically connected to a control circuit with a sensing module provided with a sensing area formed by at least one sensing coil, the circuit comprises a sensing control unit generating an electromagnetic variable quantity and a central processing module receiving the variable quantity and storing an angle data; and an inner assembly body with a front side formed with a curvature guide rail, being filled with a liquid and disposed with a metal ball displacing in the guide rail, an electromagnetic field generated by the coil generates changes in an inductance value due to the ball passing through, the sensing control unit generates the variable quantity being transmitted to the central processing module, an angle information converted by the central processing module through the variable quantity and the angle data is displayed on the display module.

A level including level vial(s) having enhanced visibility are provided. The level may include a level vial including a material that is attracted to the interface or border of a globule within the level vial which improves visibility of the interface. The level may include a solid level indicator having easy to see end surfaces that are generally vertically oriented when in the level position. The end surfaces of the solid level indicator may allow the user to more easily compare the position of the solid level indicator to indicating lines formed on the level vial. The level may include a level vial including a first liquid and an immiscible second liquid forming a globule with the first material. The globule formed from the second material may improve visibility compared to a typical air bubble.

A level including level vial(s) having enhanced visibility are provided. The level may include a level vial including a material that is attracted to the interface or border of a globule within the level vial which improves visibility of the interface. The level may include a solid level indicator having easy to see end surfaces that are generally vertically oriented when in the level position. The end surfaces of the solid level indicator may allow the user to more easily compare the position of the solid level indicator to indicating lines formed on the level vial. The level may include a level vial including a first liquid and an immiscible second liquid forming a globule with the first material. The globule formed from the second material may improve visibility compared to a typical air bubble.

A tilt indicator includes a housing having a face member and a back member. A movable mass member is disposed within the housing between the face member and the back member. A first encoded indicium is disposed on the mass member, and a second encoded indicium is located on the back member. In response to the tilt indicator being subjected to a tilt event exceeding a threshold, the mass member moves from a first position to a second position.

A tilt indicator includes a housing having a face member and a back member. A movable mass member is disposed within the housing between the face member and the back member. A first encoded indicium is disposed on the mass member, and a second encoded indicium is located on the back member. In response to the tilt indicator being subjected to a tilt event exceeding a threshold, the mass member moves from a first position to a second position.