The disclosed invertible structures rely on combinations of translational movements to effect inversion. An exemplary invertible structure includes a track operable to be slidably coupled to a connector element of a longitudinal structure. In an embodiment, the connector element may include at least two connectors at least partially disposed in a slot defined in the track, which may have a plurality of translational axes for translational movements of the connectors of the longitudinal structure that would effect the inversion of the longitudinal structure.

The disclosed invertible structures rely on combinations of translational movements to effect inversion. An exemplary invertible structure includes a track operable to be slidably coupled to a connector element of a longitudinal structure. In an embodiment, the connector element may include at least two connectors at least partially disposed in a slot defined in the track, which may have a plurality of translational axes for translational movements of the connectors of the longitudinal structure that would effect the inversion of the longitudinal structure.

The present invention relates to the field of vehicle correction, and provides a calibration system and a calibration bracket thereof. The calibration bracket includes: a base, a stand assembly and a beam assembly. The stand assembly is fixedly connected to the base. The beam assembly includes a first beam portion, a second beam portion and a connecting portion, the connecting portion being mounted to the stand assembly, one end of the connecting portion being hinged to the first beam portion, and the other end of the connecting portion being hinged to the second beam portion. The first beam portion and the second beam portion can respectively rotate toward each other relative to the connecting portion, so that the beam assembly can be folded. The first beam portion and the second beam portion can also respectively rotate away from each other relative to the connecting portion, so that the beam assembly can be unfolded. In the foregoing structure, the first beam portion and the second beam portion can respectively rotate toward each other relative to the connecting portion, so that the beam assembly is folded, thereby reducing a volume of the calibration bracket to facilitate shipment.

The embodiments disclose a method including creating a smart tripod configured for operating according to user selected command signals and on-board guidance controls including a physical tracking system to track an object and person with a steering system override element, wherein the smart tripod may include self-propelled motorized drive systems, wherein the smart tripod may include coupling devices for attachment to an external self-propelled apparatus, wherein the smart tripod may include a movable luggage integrated telescoping smart tripod, using smart tripod digital controllers to receive and transmit signals for responding to user transmitted signals and digital commands wirelessly for various operations including sound and voice recording, wherein the on-board guidance controls include GPS maneuvering systems and obstacle recognition and avoidance systems, and wherein digital controllers include user face and voice recognition systems.

A loudspeaker rigging apparatus (100) for suspending a plurality of loudspeakers from temporary or permanent structure. The loudspeaker rigging apparatus (100) comprises a beam (102) configured to be secured to an uppermost speaker in an array of speakers (106) and a trolley (121) coupled to the beam (102) and moveable along at least part of a length of the beam (102). The trolley (121) comprises a rigging point (110) configured for connection to the rigging or scaffold, and the beam (102) may be angularly displaced with respect to a horizontal plane when the rigging point (110) is connected to the rigging or scaffold.

A loudspeaker rigging apparatus (100) for suspending a plurality of loudspeakers from temporary or permanent structure. The loudspeaker rigging apparatus (100) comprises a beam (102) configured to be secured to an uppermost speaker in an array of speakers (106) and a trolley (121) coupled to the beam (102) and moveable along at least part of a length of the beam (102). The trolley (121) comprises a rigging point (110) configured for connection to the rigging or scaffold, and the beam (102) may be angularly displaced with respect to a horizontal plane when the rigging point (110) is connected to the rigging or scaffold.

A target stand having a base, a vertical beam extending upwardly from the base, a crossbeam secured to the vertical beam, a locking and rotation assembly having a first portion engaged for vertical movement with the vertical beam and a second portion attached to the crossbeam, the first portion attached to the second portion with a pivot bolt, wherein the crossbeam is securable to the vertical beam in a first locked horizontal position using the locking and rotation assembly, and wherein the crossbeam is rotatable about the pivot bolt to move into a first non-horizontal position.

A method to adjust the height of a display is provided. One terminal of the telescopic trolley is connected to a first surface of the display and is separated from the lower edge of the display by a first distance. The lower edge of the display is away from the ground by a second distance. The method includes: obtaining a first height value indicating a user's height, an eye height or a shoulder height; searching for a second height value corresponding to the first height value in the look-up table according to the first height value; calculating the sum of the first distance and the second distance, and comparing the sum with the second height value to obtain a comparison result; and adjusting the length of the telescopic trolley according to the comparison result, so that the sum is equal to the second height value.

The display apparatus includes a display assembly. The display apparatus further includes a mounting device on which the display assembly is mounted and a rotating shaft forming the center of rotation of the display assembly. The rotating shaft is at a fixed location for the mounting device and the display assembly, respectively. The display assembly is switched between a first mode and a second mode rotated from the first mode about a rotating shaft and is changed in the height of the center of the display assembly.

The display apparatus includes a display assembly. The display apparatus further includes a mounting device on which the display assembly is mounted and a rotating shaft forming the center of rotation of the display assembly. The rotating shaft is at a fixed location for the mounting device and the display assembly, respectively. The display assembly is switched between a first mode and a second mode rotated from the first mode about a rotating shaft and is changed in the height of the center of the display assembly.