Level tools and level indicating devices for determining the angle of a vertically oriented object relative to both level and plumb capable of being read without requiring the tool's user to change his or her position or the position of the level tool.

Disclosed is a multifunctional level gauge for applying a nano adhesive tape for convenient and quick positioning. The multifunctional level gauge comprises a level ruler (1) with a hollow profile, wherein a transverse level (2) and a vertical level (3) are respectively arranged on the level ruler (1), at least two nano adhesive tapes (4) for convenient and quick positioning are pasted and fixed to a left side surface of the level ruler (1), and an adhesive tape positioning structure is arranged below the nano adhesive tapes (4); and an angle measurement device (5) capable of performing 360-degree omnidirectional measurement and a swing-type offset measurement structure for cooperatively observing whether an intersection plane is inclined are arranged at an upper end portion of the level ruler (1), and the swing-type offset measurement structure comprises a swing connection rod (6), a counterweight cone (7) and an alignment pointer (8). On the basis of achieving 360-degree omnidirectional angle measurement, horizontal measurement, vertical measurement, and plane measurement can be achieved at the same time; during measurement, whether a measurement plane is inclined can be determined by observing whether the counterweight cone (7) coincides with the alignment pointer (8); and the multifunctional level gauge can be directly pasted to the measurement plane, the level gauge can be conveniently placed by a worker, the working efficiency is improved, and the measuring effect is good.

Level tools and level indicating devices for determining the angle of a vertically oriented object relative to both level and plumb capable of being read without requiring the tool's user to change his or her position or the position of the level tool.

Level tools and level indicating devices for determining the angle of a vertically oriented object relative to both level and plumb capable of being read without requiring the tool's user to change his or her position or the position of the level tool.

A level includes an end cap releasably attached to a level body. The end cap is configured to be inserted in, and withdrawn from, the level body with a sliding fit. Accordingly, the end cap can be withdrawn from the level body simply by squeezing with the fingers of one hand two opposing actuators formed in the end cap against the bias of respective living hinges to release detents from detent apertures formed in opposing side walls of the level body, and then using the same hand to slide the end cap out of the level body without having to touch the level body with either hand.

A non-electronic head-worn system for providing visual inertial head orientation information to a person is disclosed. The system comprises a head-worn unit that displays at least one orientation reference symbol to the person wearing the unit wherein the orientation reference symbol stays in a fixed visual position for the person when the person's head changes orientation. The system comprises an optical element located in the optical path between the user's eye and the orientation reference symbol, such as a lens, mirror, a prism, a beam splitter, a retro-reflector, or any other device or medium that can change the appearance or apparent location of an image. The system further comprises a pitch indicator that gives visual pitch information to the person and/or a roll indicator that gives visual roll information to the person. The pitch indicator and the roll indicator are responsive to a pendulum, a rolling element, or a fluid in a reservoir. The pitch element and the roll element do not use electricity or electronics.

A non-electronic head-worn system for providing visual inertial head orientation information to a person is disclosed. The system comprises a head-worn unit that displays at least one orientation reference symbol to the person wearing the unit wherein the orientation reference symbol stays in a fixed visual position for the person when the person's head changes orientation. The system comprises an optical element located in the optical path between the user's eye and the orientation reference symbol, such as a lens, mirror, a prism, a beam splitter, a retro-reflector, or any other device or medium that can change the appearance or apparent location of an image. The system further comprises a pitch indicator that gives visual pitch information to the person and/or a roll indicator that gives visual roll information to the person. The pitch indicator and the roll indicator are responsive to a pendulum, a rolling element, or a fluid in a reservoir. The pitch element and the roll element do not use electricity or electronics.

A pitch measuring device for checking a positioning precision of an operating spindle or an operating table of a machine, e.g. of a NC machine tool moving along an at least two dimensional movement path, the pitch measuring device including a measuring device including a rotary encoder and an electronics unit detecting an angular position of a housing base element relative to a housing top element wherein the measuring device is attachable at a machine arm receiving the operating spindle or at a machine table. Additionally a pendulum element can be used that is connected in a rigid manner with the measuring device and which includes a pendulum element with an integrated first inclination sensor which is supplemented by a second inclination sensor which is directly attachable at frame element of the machine.

A pitch measuring device for checking a positioning precision of an operating spindle or an operating table of a machine, e.g. of a NC machine tool moving along an at least two dimensional movement path, the pitch measuring device including a measuring device including a rotary encoder and an electronics unit detecting an angular position of a housing base element relative to a housing top element wherein the measuring device is attachable at a machine arm receiving the operating spindle or at a machine table. Additionally a pendulum element can be used that is connected in a rigid manner with the measuring device and which includes a pendulum element with an integrated first inclination sensor which is supplemented by a second inclination sensor which is directly attachable at frame element of the machine.