![]() ![]() The cord may, of course, be also so treated. If desired, the interiorof the tube may be illuminated by a flashlight or the like for better observation, or the marker 64 can be outlined in some luminous paint which makes it particularly adaptable for work in dark places. 56 is mounted on an inwardly projecting shelf or the like 62, this shelf having a mark 64 in the middle thereof whereby the cord or string 34 may be accurately aligned with respect to the center vof the tube 52. On a quiet or still day when no great Wind is blowing the Window may be left open for slightly more convenient observation of the plumb bob and line. provided whereby the same may be fastened in closed position. As best shown in Figure 5, the frame is mounted on hinges or the like 5S so that the same may-be opened if access is desired to the interior of the tube, and a latch 60 is. ![]() Obviously, the complete length of the joined sleeves is variable to conform to the requirements Vof the device or structures being aligned at the moment, but it might be explained that the reinforced columns for which this device is particularly adapted are approximately ten feet high in the usual building, and therefore, the assembled length of the wind-proof plumb bob should be around nine feet.Īdjacent the lower end of the device and in the sleeve 18 is an opening 52 which is normally closed by means of a pane of glass or the like 54 in a frame 56. Another sleeve 22 is likewise removably attached to the sleeve 18 by means of pins 24 operating in bayonet slots 26 as best shown in Figure 4, and a further and similar attachment is made with an additional sleeve 28 as illustrated in Figure l. Adapted to be removably attached to the upper edge of the receptacle 14 is a sleeve 18, preferably of aluminum or some similar suitable material, the attachment being removable, and being made by means of pin 20 operating in bayonet slots or the like formed in the lower portion of the sleeve 18. 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. ![]() Google Patents US1952745A - Windproof plumb bobĭownload 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. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |