These example sentences are selected automatically from various online news sources to reflect current usage of the word 'plumb bob.' Views expressed in the examples do not represent the opinion 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. David Grossman, Popular Mechanics, 17 Jan. 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. 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. SitePro - Gammon Reel and 16 oz Plumb Bob Sheath Kit (15-1021GR16KIT) ES8331. 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. Open box: An item in excellent, new condition with no wear. Feel free to look at what we have in stock, so you can find a brass plumb bob that will meet your specific needs. 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). To prevent injury from falling, it is recommended to wear a helmet, safety glasses, and safety shoes.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. When replacing the plumb bobs retainer or plumb bobs, follow the manual, and be sure to securely attach the plumb bobs retainer or plumb bobs so that the knot will not come undone. The plumb bobs retainer, thread, and plumb bob can each be replaced. However, if heavier plumb bobs are used than the weight that is compatible with the plumb bobs retainer, the plumb bob may fall off. The heavier the weight, the faster the oscillating stops. Plumb bobs weighing from 100 to 1,000 grams are available. A plumb bob with a static function is designed to limit the direction of oscillation to one direction so that the oscillation will subside quickly. When the plumb bobs are lowered, it should swing in a circular motion, gradually decreasing in amplitude. When measuring, make sure that the plumb bobs are not swaying. The vertical direction (perpendicular) is toward the center of the earth, and if the wall or post is vertical, the distance between these two points is equal. The plumb bobs are hung from a plumb bob holder fixed to a wall or post, and the distance from the wall or post is measured at two points: the top of the thread and the tip of the plumb bobs. There are two types of plumb bobs retrievers: those that manually reel in the thread and those that automatically reel in the thread with the touch of a button. In environments where the wind can affect the plumb bob, even if it has a standstill function, a windbreak type plumb bobs with a long, narrow tube covering the plumb bobs are suitable. Some plumb bobs are equipped with a standstill function that quickly reduces sway. If the wall is concrete, attach the metal hook to a nail. If the wall being used is made of wood, it can be attached with a push pin (needle) if it is made of metal, it can be attached with a magnet. Various types of plumb bobs are available depending on the environment in which they are used. Plumb bobs are used not only to measure the verticality of columns and walls but also to install transits and to raise ground markers. The laser type has the advantages of not being affected by wind and not requiring rewinding of the string, but it also has the disadvantage that the laser will be tilted if the mounting surface is tilted. There are also plumb bobs that use lasers instead of strings and weights. It has a spindle-shaped weight called a "plumb bob" at the end of a string, which is hung from a plumb bob holder to measure verticality.Īlthough a level that measures bubbles in a glass container filled with liquid can also be used to measure verticality, the primitive plumb bob, which uses gravity, is a relatively more accurate way to measure verticality. A plumb bob is a tool used to measure the verticality of building columns and walls.
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