US Patent 10969213 Articulating level systems

A specially designed bubble level having an articulating portion that may be used to verify that an angle made in a tubular structure for example, electrical conduit, is level. The level apparatus of the present disclosure may also be used to verify the angular displacement of the tubular structure about a bend, using a bubble level as reference. The apparatus is particularly useful during manual bending of electrical conduit and similar field-modified tubular structures as the apparatus provides a convenient and readily-discernible indication when a tubular structure that is being bent has been brought to a predetermined bend angle.