20 results found for: “plumb_bob”.

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Plumb bob

plumb bob, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line...

Last Update: 2021-03-01T20:20:01Z Word Count : 589 Synonim Plumb bob

Vertical and horizontal

construction, the direction designated as vertical is usually that along which a plumb-bob hangs. Alternatively, a spirit level that exploits the buoyancy of an...

Last Update: 2021-03-15T16:57:17Z Word Count : 2378 Synonim Vertical and horizontal

Operation Plumbbob

Operation Plumbbob was a series of nuclear tests conducted between May 28 and October 7, 1957, at the Nevada Test Site, following Project 57, and preceding...

Last Update: 2021-04-19T13:47:57Z Word Count : 1714 Synonim Operation Plumbbob


Plumb may refer to: Plumb bob, a type of tool Plumb, to measure the depth of water with a sounding line Plumb (tools), a brand of tools known for its...

Last Update: 2018-12-26T14:19:13Z Word Count : 104 Synonim Plumb

Schiehallion experiment

the pendulum's plumb-bob slightly out of true (in the sense that it doesn't point to the centre of mass of the Earth). The change in plumb-line angle against...

Last Update: 2021-04-19T21:02:07Z Word Count : 3563 Synonim Schiehallion experiment

Plumb Bob Point

Plumb Bob Point (77°52′S 161°44′E / 77.867°S 161.733°E / -77.867; 161.733Coordinates: 77°52′S 161°44′E / 77.867°S 161.733°E / -77.867; 161.733)...

Last Update: 2015-11-21T22:41:03Z Word Count : 117 Synonim Plumb Bob Point

String (structure)

plumb bob, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line...

Last Update: 2020-11-13T14:11:36Z Word Count : 2620 Synonim String (structure)

Quadrant (instrument)

attached to the apex of the quadrant with a bead, for calculation, and a plumb bob. They were also sometimes drawn on the back of astrolabes. The universal...

Last Update: 2021-03-04T20:56:40Z Word Count : 2587 Synonim Quadrant (instrument)


the deceleration would be ineffective. The solution settled upon was a plumb-bob, which would dangle below the platform and activate the rockets when it...

Last Update: 2021-01-08T02:04:45Z Word Count : 1161 Synonim Hajile

Temporary adjustments of theodolites

such that observer can see through telescope conveniently. After this, a plumb bob is suspended from the bottom of the instrument and it should approximately...

Last Update: 2020-10-31T13:09:46Z Word Count : 833 Synonim Temporary adjustments of theodolites

Gravity of Earth

It is a vector (physics) quantity, and its direction coincides with a plumb bob. A non-rotating perfect sphere of uniform mass density, or whose density...

Last Update: 2021-04-06T22:44:44Z Word Count : 4190 Synonim Gravity of Earth

Tripod (surveying)

plastic. The mounting screw is hollow and has two lateral holes to attach a plumb bob to center the instrument e.g. over a corner or other mark on the ground...

Last Update: 2020-12-30T03:50:29Z Word Count : 642 Synonim Tripod (surveying)

Mason–Dixon line

causing this deflection induced by the pull of a nearby mountain upon a plumb-bob in 1772 and sent Mason (who had returned to Britain) on a site survey...

Last Update: 2021-04-18T04:07:01Z Word Count : 5139 Synonim Mason–Dixon line

Optical square

both as a hand held tool for sighting between two poles (often with a plumb bob hung from the handle) and also mounted on a Jacob's staff. Hasluck, Paul...

Last Update: 2021-01-22T03:46:43Z Word Count : 178 Synonim Optical square

Spirit level

designed to indicate whether a surface is horizontal (level) or vertical (plumb). Different types of spirit levels may be used by carpenters, stonemasons...

Last Update: 2021-03-09T22:05:47Z Word Count : 1648 Synonim Spirit level


Plummet may refer to: Plumb bob, a weight with a pointed tip on the bottom that is suspended from a string and used as a reference line that is perpendicular...

Last Update: 2020-02-15T13:41:01Z Word Count : 79 Synonim Plummet

Space elevator

held in tension between Earth and the counterweight like an upside-down plumb bob. The cable thickness is adjusted based on tension, it has its maximum...

Last Update: 2021-04-21T16:03:29Z Word Count : 9966 Synonim Space elevator


brooch suggest the presence of women. One of the inscribed objects is a plumb bob with "CHOI", or "C(o)HO(rtis) I", i.e. "property of the first cohort"...

Last Update: 2021-02-19T13:37:42Z Word Count : 565 Synonim Kalkriese

Laser line level

A laser line level is a tool combining a spirit level and/or plumb bob with a laser to display an accurately horizontal or vertical illuminated line on...

Last Update: 2021-02-25T07:10:58Z Word Count : 265 Synonim Laser line level

Plummet amulet

plummet amulet is an amulet created by Ancient Egyptians in the shape of a plumb bob or plummet. They included these plummet amulets in the mummification process...

Last Update: 2020-10-20T19:37:41Z Word Count : 188 Synonim Plummet amulet

Main result

Plumb bob

A plumb bob, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line. It is a precursor to the spirit level and used to establish a vertical datum. The instrument has been used since at least the time of ancient Egypt to ensure that constructions are "plumb", or vertical. It is also used in surveying, to establish the nadir with respect to gravity of a point in space. It is used with a variety of instruments (including levels, theodolites, and steel tapes) to set the instrument exactly over a fixed survey marker or to transcribe positions onto the ground for placing a marker.

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