I have seen them marked and offered in both GurleyĪnd K& E catalogs as well as some others. Internal Reel Brass Plumb Bob I am not sure who the maker of this ingenious internal A good thing for the bored carpenter, or his gift giving I know this one is not Bob, but she is not marked w/ her I saw another version named Brandy recently, and was told there was a Bob as She is anatomically correct both front and back, and really does hang quite well. The conditionĢ Gurley Long Stem Plumb Bobs These are both nice, and both are marked on theīob This brass plumb bob measures over 7" long and had Scientific instrument maker John Roach and this plumbīob dates from right around the turn of the century. It is clearly stamped on the side with the Sala name and Sanįrancisco location. This large plumb bob has a great shape and form with its long neck and SF Long Neck / Wide Shoulder Brass Plumb Bob This can be polished or allowed to progress. There is some tarnish as it is beginning to develop a In the original box and looks to be unused. "Our Very Best" Plumb Bob in Case H S B stands for Hibbard, Spencer, & Bartlett CO. One has seen considerably more use w/ losses to that green finish.īoth have their wicks. One still retains nearly all of its original green lacquerįinish. E. Gurley #170 Plummet Lamps in Original Box Both are in fine condition with a minimum of The small turnip bob on the right is marked The large turnip in the middle is unmarked. It is near mint with nearly all its original finish. The left is a marked K & E / Keuffel & Esser # 6487 internal reel plumbīob. Our current offering of Antiques for sale are at our sister Website The reasons for that are discussed on the FAQ page. On other pieces you will see no price, or a price range, Span a long time and may not reflect current values. Most prices seen reflect actual sale results from this website. We Buy Quality Surveying Related AntiquesĬontact Us Note Concerning Prices Seen Below: Precisely machined and balanced bobs have pointed tips, and can be made of brass, steel, or other materials, including plastic.Antique surveying related tools we have sold. (Masons prefer nylon because it stands up better over time to the dampness that comes with the trade.) At one end of the string the weight is affixed. The plumb consists of a specially designed weight and coarse string made of twisted cotton or nylon threads. In a sense, the plumb bob is the vertical equivalent of the line level. You don’t have to be a physics whiz to understand that a string suspended with a weight at the bottom will be both vertical and perpendicular to any level plane through which it passes. The plumb bob or plumb line employs the law of gravity to establish what is “plumb” (that is, what is exactly vertical, or true). As is so often the case, it isn’t how fancy the tool is, but how well you use it. For most home toolboxes, I recommend having a single bob that weighs a few ounces. (It’s also thought that, in tandem, they used flooded ditches to determine levels.) Plumb bobs may weigh as little as an ounce or as much as several pounds, depending upon the application. Evidence suggests that Egyptian architects used plumb bob-like tools to establish verticals in constructing the pyramids.
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