![]() ![]() These examples are programmatically compiled from various online sources to illustrate current usage of the word 'plumb bob.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. 2018 Cake pans, coffee pots, cash registers, and a white ElectroChef stove appeared amid scientific instruments such as steel calipers and a brass plumb bob. Levels are used to draw lines and check horizontal, vertical and even angled surfaces, while plumb bobs are handy for transferring marks and aligning elements. David Grossman, Popular Mechanics, 17 Jan. It features a reinforced aluminum frame and high impact panels for durability, and a top-read window for easy viewing. Rhett Allain, WIRED, Accurate to within 1/4 of an inch per 100 feet of range, the kit comes with a tripod with quick-adjust legs, a heavy-duty 8-foot aluminum grade rod (feet-inches-eighths), a plumb bob, and a kit box to safeguard the laser during transport. Find plumb, level and 45° quickly and easily with Johnsons 9' magnetic torpedo level. 2019 The plumb bob will hang at the angle reading for your latitude. Andrew Tallon, National Geographic, 16 Apr. 2020 For a long time, the tools used to measure medieval buildings were nearly as old as the buildings themselves: plumb bobs, string, rulers, and pencils. Ryan D'agostino, Popular Mechanics, 24 Oct. 2022 For holes deeper than three feet, drop a plumb bob (a conical weight attached to a string) into it to give you some sense whether the hole itself is plumb and uniformly shaped. ![]() Jennifer Ouellette, Ars Technica, Where many competitors use surveying equipment that’s accurate to within a thousandth of a degree to orient their robots on startup, Coordinated often relies on a plumb bob (cost: a few bucks). This plumb line is important for lining up anatomical geometries and visualizing the subject's center of balance.Recent Examples on the Web Possible uses included: a plumb bob or a loom weight, a liquid sprinkler, a fire starter, a lamp, a smoking pipe, or parts of an apparatus for distillation. The device used may be purpose-made plumb lines, or simply makeshift devices made from a piece of string and a weighted object, such as a metal washer. Students of figure drawing will also make use of a plumb line to find the vertical axis through the center of gravity of their subject and lay it down on paper as a point of reference. Ī plumb bob may be in a container of water (when conditions are above freezing temperatures), molasses, very viscous oils or other liquids to dampen any swinging movement, functioning as a shock absorber.ĭetermining center of gravity of an irregular shape The early skyscrapers used heavy plumb bobs, hung on wire in their elevator shafts. A variation of this tool has the plumb line hung from the top of an inverted T shape. An A-frame level with a plumb line hung from the vertex was also used to find horizontal these were used in Europe until the mid–19th century. However, if they are mounted on a suitable scale the instrument may also be used as an inclinometer to measure angles to the vertical.Īncient Egyptians used a plumb line attached to the top outer part of a tool resembling a letter E when placed against a wall, the plumb line would indicate a vertical line. A plumb bob and line alone can determine only a vertical reference.
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