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  2. Facing and trailing - Wikipedia

    en.wikipedia.org/wiki/Facing_and_trailing

    Turnouts facing and trailing. Note that this diagram is for left-hand traffic; for right-hand traffic, "F" and "T" would be swapped. Facing or trailing are railway turnouts (or 'points' in the UK) in respect to whether they are divergent or convergent. When a train traverses a turnout in a facing direction, it may diverge onto either of the two ...

  3. Free-bass system - Wikipedia

    en.wikipedia.org/wiki/Free-bass_system

    The system arranges the left-hand buttons so chromatic arrangement of keys, adjoining Circle-of-Fifths, chord inversions, and alternate chord voicings are available to the player simultaneously. A famous accordion musician and proponent of the advantages of the Moschino free-bass system was George Secor , and links to a more detailed ...

  4. Excavator controls - Wikipedia

    en.wikipedia.org/wiki/Excavator_controls

    Additionally there is a switch on the right hand joystick to operate attached tools. The most commonly used control pattern throughout the world is the ISO controls. In the ISO control pattern, the left hand joystick controls Swing (left & right) and the Stick Boom (away & close) , and the right hand joystick controls the Main Boom (up & down ...

  5. Railroad switch - Wikipedia

    en.wikipedia.org/wiki/Railroad_switch

    A right-hand railroad switch with point indicator pointing to right Animated diagram of a right-hand railroad switch. Rail track A divides into two: track B (the straight track) and track C (the diverging track); note that the green line represents direction of travel only, the black lines represent fixed portions of track, and the red lines depict the moving components.

  6. Dual gauge - Wikipedia

    en.wikipedia.org/wiki/Dual_gauge

    In 1900, in South Australia, a three-rail dual-gauge system was proposed in order to avoid a break of gauge. However, designing turnouts was considered to be difficult due to the difference of only 165 millimetres (6.5 inches) between the 1435 mm ( 4 ft 8 + 1 ⁄ 2 in ) and the 1600 mm ( 5 ft 3 in ) broad gauge.

  7. Chromatic button accordion - Wikipedia

    en.wikipedia.org/wiki/Chromatic_button_accordion

    Chromatic button accordion; Classification: Free-reed aerophone: Playing range; Right-hand manual: The Russian bayan and chromatic button accordions have a much greater right-hand range in scientific pitch notation than an accordion with a piano keyboard: five octaves plus a minor third (written range = E2-G7, actual range = E1-D9, some have a 32 ft Register on the Treble to go even lower down ...

  8. Track circuit - Wikipedia

    en.wikipedia.org/wiki/Track_circuit

    Track circuits allow railway signalling systems to operate semi-automatically, by displaying signals for trains to slow or stop in the presence of occupied track ahead of them. They help prevent dispatchers and operators from causing accidents, both by informing them of track occupancy and by preventing signals from displaying unsafe indications.

  9. Gin pole - Wikipedia

    en.wikipedia.org/wiki/Gin_pole

    A gin pole in use loading logs A gin pole used to install a weather vane atop the 200-foot steeple of a church Roof trusses being assembled with gin poles. A gin pole is a mast supported by one or more guy-wires that uses a pulley or block and tackle mounted on its upper end to lift loads. The lower end is braced or set in a shallow hole and ...