The wind-proof plumb bob itself of this invention consists of a casing or receptacle 14 which forms the bottom of the device and which is kept about three-fourths filled with oil, glycerine, or some other preferably viscous liquid as illustrated at 16. G01C15/00- Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00. ![]() G01C- MEASURING DISTANCES, LEVELS OR BEARINGS SURVEYING NAVIGATION GYROSCOPIC INSTRUMENTS PHOTOGRAMMETRY OR VIDEOGRAMMETRY.229910052751 metal Inorganic materials 0.000 description 2.PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2.XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2.229910052782 aluminium Inorganic materials 0.000 description 2.239000011150 reinforced concrete Substances 0.000 description 4.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Deasy Patrick filed Critical Deasy Patrick Priority to US539683A priority Critical patent/US1952745A/en Application granted granted Critical Publication of US1952745A publication Critical patent/US1952745A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US539683A Inventor Deasy Patrick Original Assignee Deasy Patrick Priority date (The priority date is an assumption and is not a legal conclusion. Some bobs have pointed tips that can be bent by repeated use or abuse if the point on yours is bent or out of alignment, replace it.- Google Patents US1952745A - Windproof plumb bobÄownload PDF Info Publication number US1952745A US1952745A US539683A US53968331A US1952745A US 1952745 A US1952745 A US 1952745A US 539683 A US539683 A US 539683A US 53968331 A US53968331 A US 53968331A US 1952745 A US1952745 A US 1952745A Authority US United States Prior art keywords plumb bob housing bob windproof plumb Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Excavation and foundation contractors rely upon the plumb line, and constructing a chimney the tool can indicate whether a flue is running true vertical or veering off plumb. Surveyors sometimes use plumb bobs for lining up points or transferring them. The plumb line in one place can be used to sight an object in another - a pipe, for example - for plumb. Once it is hung and still, the top and bottom points can be marked and used as guides. For example, you can locate fixtures or decorations in relation to an object or surface below (or above) using the plumb line. A spirit level will also accomplish those tasks, but some jobs are much more easily done using the tool. The plumb bob is useful in establishing vertical for a wall in construction or a doorjamb when hanging a door. (Note that the line must be hanging free to get an accurate reading.) The weight, or bob, is then allowed to swing freely when it stops, the point of the bob is precisely below the point at which the string is fixed above. ![]() To use the tool, the string is fixed at the point to be plumbed.
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