An assembly for mounting to a head-worn accessory, the assembly includes a body configured to be affixed onto the accessory. The body has a level bubble tube. A second body configured to be affixed onto the accessory, the second body having a second level bubble tube. The second body is pivotably attached to the first body by a connection that allows pivoting of the second body relative to the first body.

An automatic process and structural features for accurately producing levels is provided. The process enables more rapid production of levels, less operator work or error, and the ability to quantify errors and tolerances in the manufacture of the level. Coupling a level datum plane formed on the endcaps of a vial with a level datum plane of a frame ensures accurate construction of a level that can be automated and toleranced. Ensuring that the level datum plane created at the endcaps remains parallel (or at some other predesigned angle) to the measuring surfaces of the level reduces labor to manufacture the level and ensures measurement accuracy.

A device 1 mountable to an upright ST. The device comprises a body 3 and an arm 5. The body is reversible relative to the upright, about an upright axis, from a first orientation to a second orientation. The body comprises first contacting portions 3a (arranged to contact a front of the upright when the body is in the first orientation) and second contacting portions 3b (arranged to contact a front of the upright when the body is in the second orientation). The arm is movable relative to the body from a first position (in which the arm extends rearwardly beyond the first contacting portions to pass one side of the upright and engage a rear of the upright) to a second position (in which the arm extends rearwardly beyond the second contacting portions to pass another side of the upright and engage the rear of the upright).

A semiconductor-machine automatic leveling apparatus includes an inclination adjusting gear, a motor, a driving gear, an inclination acquisition mechanism and a controller. The inclination adjusting gear is configured to drive one side of a tabletop of a wafer transfer machine to move up and down. The driving gear is mounted on a rotation shaft of the motor and engaged with the inclination adjusting gear. The inclination acquisition mechanism is configured to acquire inclination information of the tabletop of the wafer transfer machine and electrically connected to the controller. The controller is electrically connected to the motor and configured to control the motor to operate according to the inclination information.

A semiconductor-machine automatic leveling apparatus includes an inclination adjusting gear, a motor, a driving gear, an inclination acquisition mechanism and a controller. The inclination adjusting gear is configured to drive one side of a tabletop of a wafer transfer machine to move up and down. The driving gear is mounted on a rotation shaft of the motor and engaged with the inclination adjusting gear. The inclination acquisition mechanism is configured to acquire inclination information of the tabletop of the wafer transfer machine and electrically connected to the controller. The controller is electrically connected to the motor and configured to control the motor to operate according to the inclination information.

A geodetic levelling staff, a method for measuring a height with the geodetic levelling staff and a system including the geodetic levelling staff and a level are provided. The geodetic levelling staff includes a circular level that indicates whether the geodetic levelling staff is in a vertical position, a level detection unit for detecting a bubble position of the circular level, a control circuit that receives detected data performed by the level detection unit and transmits the detected data to a near field communication tool, the near field communication tool for performing a communication from the geodetic levelling staff to the level according to the detected data received from the control circuit, wherein the level operates according to the detected data received from the near field communication tool.

A geodetic levelling staff, a method for measuring a height with the geodetic levelling staff and a system including the geodetic levelling staff and a level are provided. The geodetic levelling staff includes a circular level that indicates whether the geodetic levelling staff is in a vertical position, a level detection unit for detecting a bubble position of the circular level, a control circuit that receives detected data performed by the level detection unit and transmits the detected data to a near field communication tool, the near field communication tool for performing a communication from the geodetic levelling staff to the level according to the detected data received from the control circuit, wherein the level operates according to the detected data received from the near field communication tool.

A method for identifying a surface slope includes the following steps: A device body with a tilt angle relative to an absolute horizontal plane and associated with a gravity is placed. A plurality of gravity response signals respectively corresponding to a plurality of angles readouts upon sensing the tilt angle are generated. Each of the plurality of gravity response signals is compared with a reference signal one by one to obtain a respective deviation comparison signal. An optical signal having a parameter is emitted according to a magnitude of the respective deviation comparison signal, wherein the parameter and the magnitude have a mathematical relationship therebetween.

A method for identifying a surface slope includes the following steps: A device body with a tilt angle relative to an absolute horizontal plane and associated with a gravity is placed. A plurality of gravity response signals respectively corresponding to a plurality of angles readouts upon sensing the tilt angle are generated. Each of the plurality of gravity response signals is compared with a reference signal one by one to obtain a respective deviation comparison signal. An optical signal having a parameter is emitted according to a magnitude of the respective deviation comparison signal, wherein the parameter and the magnitude have a mathematical relationship therebetween.

The present disclosure discloses a device (100) for determining orientation of an object. The device includes a hollow spherical member (101), which is filled with a fluid medium (109). A plurality of sensors (102) is positioned on a circumference of the hollow spherical member. Further, the device comprises a light source (104) fixed within the hollow spherical member, and a capsule (103) is disposed within the hollow spherical member. The capsule is configured to displace within the hollow spherical member and occupy uppermost point of the hollow spherical member. The capsule covers the one or more sensors at the corresponding uppermost point and, thus blocks impingement of light on to corresponding one or more sensors. The blocked one or more sensors activate or deactivate, and generate a feedback or input signal, which is received by a computing unit (107), to determine orientation of the object.