An effective inexpensive, compact and easy-to-use self-leveling laser level capable of projecting at least two laser beams at any desired angle dialed on a 360-degree format.

The present invention is a specialized laser alignment tool for locating at least one roofing penetration point for a conduit installation. The specialized laser alignment tool is fixably mountable to and self-centering on an electrical hub and projects one or more roofing penetration points which are in vertical alignment with the electrical hub.

A measuring-robot device for fully mechanized coal mining faces and an automatic measuring system are provided. The measuring robot includes a suspension cage, a total station, a prism and an industrial computer. Firstly, the suspension cage with automatic leveling function is fixed on the top beam of a hydraulic support, then the total station and the industrial computer are fixed in the suspension cage, and finally the prism with a plug connector is installed under the base of the total station, forming a measuring-robot device. According to the fluctuations of the fully mechanized coal mining face, several measuring robots will be deployed along the fully mechanized coal mining face, and the adjacent measuring robots are line of sight to each other, forming the automatic measuring system covering the fully mechanized coal mining.

A measuring-robot device for fully mechanized coal mining faces and an automatic measuring system are provided. The measuring robot includes a suspension cage, a total station, a prism and an industrial computer. Firstly, the suspension cage with automatic leveling function is fixed on the top beam of a hydraulic support, then the total station and the industrial computer are fixed in the suspension cage, and finally the prism with a plug connector is installed under the base of the total station, forming a measuring-robot device. According to the fluctuations of the fully mechanized coal mining face, several measuring robots will be deployed along the fully mechanized coal mining face, and the adjacent measuring robots are line of sight to each other, forming the automatic measuring system covering the fully mechanized coal mining.

A plumb bob for detecting differing fluids in tanks and vessels includes a tubular housing having enclosed ends. An LED infrared transmitter disposed in the tubular housing transmits infrared signals through fluids in which the plum bob is immersed to a LED infrared receiver. Circuitry disposed within the housing provides power to the LEDs and operates an LED driver to determine fluid parameters for the types of fluids in which the plumb bob is immersed. One or more vibration signal generators emits different vibrations according to the types of fluids detected. The vibration signal generators transmit the vibrations from the housing through a gauge tape line to a gauge tape reel held by an operator, who can determine the fluid types by the vibrations.

A pipe laser device is attached to plumbing that will be added to or extended to show the angle and direction of where the existing plumbing is pointing so the installer knows precisely where to drill to accommodate the new plumbing. The pipe laser has an adaptor/connector that can fit inside an existing plumbing pipe to attach the pipe laser device to the existing pipe. The device has an emitter (laser diode) within the device that delivers the beam (laser beam) from the opposite end of the device. The laser diode is centered on connector that sits within the existing pipe, and so allows the laser beam delivered from the other end to also be centered relative to the existing pipe. Thus, the beam from the opposite end can precisely indicate where on an opposing wall the opening should be created for the existing plumbing to continue through that wall.

A method and apparatus for lifting loads support from a crane to eliminate swaying of the load includes providing the crane with a laser source on either side of the crane. The center of gravity of the load is marked on the load and the boom is positioned such that the laser lights projection on the ground or on surface of the load and the center of gravity of the load are aligned in a straight line.

There is provided an apparatus, a system, and a method for locating and marking a position on a surface during surveying. The apparatus is for use with a rotorcraft or flying machine and a positioning device, and comprises a gimbal securable to the rotorcraft or flying machine, a prism fixed to the gimbal for reflecting signals from the positioning device, the prism having a center of mass, a laser secured to the gimbal and directed away from the center of mass of the prism towards the surface, and a controller for communication with the positioning device, the controller operatively coupled to the laser to operate the laser.

Alignment tools are disclosed. According to one embodiment, an alignment tool may include a vertical member comprising a front surface, a back surface, and upper surface between the front surface and the back surface, wherein at least a portion of the upper surface is angled, and at least a portion of the upper surface comprising a reference marker centered along a length of the upper surface; and a plurality of horizontal members attached to the vertical member. The alignment tool may be configured to interact with a laser beam emitted by a laser source such that the vertical member is in alignment when the reference marker is aligned with the laser beam.

A method and apparatus for lifting loads support from a crane to eliminate swaying of the load includes providing the crane with a laser source on either side of the crane. The center of gravity of the load is marked on the load and the boom is positioned such that the laser lights projection on the ground or on surface of the load and the center of gravity of the load are aligned in a straight line.