5/26/2023 0 Comments Plumb bob in surveying![]() a first slot between the end of each of said shafts and said outermost flanges, said first slot extending approximately half-way through said shaft and at a right angle to the longitudinal axis of said shaft and e. an axial shaft projecting outwardly from each of said outer flanges d. The invention of claim 1 wherein each of said spool means include: a. G01C15/00- Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00Ģ.G01C- MEASURING DISTANCES, LEVELS OR BEARINGS SURVEYING NAVIGATION GYROSCOPIC INSTRUMENTS PHOTOGRAMMETRY OR VIDEOGRAMMETRY.238000009435 building construction Methods 0.000 description 2.239000007788 liquid Substances 0.000 claims abstract description 16.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from US22390872A external-priority Application filed by W Gros filed Critical W Gros Application granted granted Critical Publication of US3789512A publication Critical patent/US3789512A/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 Inventor W Gros Original Assignee W Gros Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Plumb bob device with spool means for tethering linesĭownload PDF Info Publication number US3789512A US3789512A US3789512DA US3789512A US 3789512 A US3789512 A US 3789512A US 3789512D A US3789512D A US 3789512DA US 3789512 A US3789512 A US 3789512A Authority US United States Prior art keywords container plumb bob spool flexible slot Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US3789512A - Plumb bob device with spool means for tethering lines Hence, there’s no excuse not to make/buy and use a plumb bob if you’re in any way concerned with the quality and accuracy of whatever construction or decorating work you tackle.įeel free to drop us a comment below if you have any other questions or queries.US3789512A - Plumb bob device with spool means for tethering lines In all honesty, not only are they relatively cheap to buy, they’re simple to use and a doddle to set up, too. If you’ve decided against making a homemade plumb bob, hopefully, we’ve done enough to convince you of the merits of buying one instead to keep in your toolbox. We hope that you found this article useful. Compare the figures, adjusting the stud wall and repeating the measurements until the top and bottom figures match, at which point you’ll know that the stud wall is plumb.Repeat the process at the bottom of the plumb line. Measure the distance between the plumb line and stud wall from a point close to the top of the plumb line. Wait for the plumb wait to stop swinging.Next, tie the end of the plumb bob to the nail or the screw, ensuring that the plumb weight sits clear of the floor by a couple of inches.For example, to check that a new stud wall is vertically aligned, hammer the nail or insert the screw into a ceiling joist (ideally about an inch away from where the top of the stud wall will sit once installed). ![]() Either hammer in a nail or insert a screw into a horizontal surface that sits perpendicular to the vertical surface of which you want to check the vertical alignment.When Checking Vertical Alignment in Walls & Doors Etc. The location you’ve marked corresponds to where the center of the downlight will need to sit when fitted. Once verified, mark the position on the ceiling at the top of the plumb line. Ensure the plumb bob still hangs over the center point even after it stops swinging.Next, carefully using a ladder, take the end of the plumb line and hang the weight until it rests directly over the mark at the center of the worktop.Let’s assume that you want to fit a downlight that is centered over a kitchen island, so in this case, you’d mark a point at the very center of the island. The first step is to mark a position on the floor or worktop.When Transferring Points From Floor/Worktop to Worktop There are a couple of different ways to use a plumb bob: Finally, wait for the string and screwdriver to stop swinging before using them to test for plumb.
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