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The concept of a laser level has been around since at least the early 1970s, [2] the original spinning-mirror design laser plane and line level was patented by the late 1980s, [3] and the compact lens-based laser line level (as produced by many tool manufacturers today) was patented in the late 1990s. It was invented by Oscar Soliz in the late ...
This reduces the need to set the instrument base truly level, as with a dumpy level. Self-levelling instruments are the preferred instrument on building sites, construction, and during surveying due to ease of use and rapid setup time. A digital electronic level is also set level on a tripod and reads a bar-coded staff using electronic laser ...
The term transit theodolite, or transit for short, refers to a type of theodolite where the telescope is short enough to rotate in a full circle on its horizontal axis as well as around its vertical axis. It features a vertical circle which is graduated through the full 360 degrees and a telescope that could "flip over" ("transit the scope").
Much like BART, Washington Metro trains also have a rotary switch to allow the driver to switch between automatic and manual operation. Control panel of a Tokyo Metro 10000 series train, which has a green lever to allow the driver to switch between different modes of operation. Two white ATO start buttons are also placed beside the master ...
Bay Area Rapid Transit: Oakland Airport Connector: 22 November 2014: DCC Doppelmayr Cable Car: Cincinnati Airport People Mover: 9 June 1994: Otis Hovair: Detroit People Mover: 31 July 1987: SelTrac [14] DFW Skylink: 21 May 2005: Bombardier CITYFLO 650: DIA Automated Guideway Transit: 28 February 1995: Bombardier CITYFLO 550: ExpressTram: 24 ...
The lasers and illuminator are co-aligned and assembled into a single rotary module allowing single adjustment zeroing, with the ability to change the size of the IR Illuminator beam. The Visible light is located on the opposite side to the laser module, but cannot be activated with the laser in order to prevent white light discharge, and ...