#17 - I BREVETTI

• Theodolite (16 August 1966): a theodolite having an optical member rotatable about three axes meeting normally at a point, comprising: a stand mounted base rotatable about a vertical axis; standards carried by said base; a horizontal axle supported by said standards; a frame journaled for turning about the axis of said axle, and including a support for an optical member carried by said frames and journaled for turning about an axis normal to said axle; and an optical member mounted upon said support with its axis normal to said last named turning axis.

https://patents.google.com/patent/US3266152A/en?q=THEODOLITE&oq=THEODOLITE&page=3

• Electronic theodolite (17 April 2013): electronic theodolite, comprise: body, it is characterized in that, be fixed with lower laser plummet in the left side of described body, the centre of described body is provided with transverse axis, be positioned at the inner transverse axis end face in described body left side and be fixed with vertical code-disc, the both sides of described vertical code-disc are respectively arranged with the CCD luminotron.

  

  https://patents.google.com/patent/CN202885805U/en?q=THEODOLITE&oq=THEODOLITE
  

  
  
• Theodolite (10 May 1997): theodolite containing a base with a stator of a vertical axis of rotation and a horizontal goniometer circle, an alidade on the rotor of a vertical axis, a horizontal axis of rotation on racks of an alidade with a vertical goniometer circle on its stator and a telescope containing a lens, a main network of threads and an eyepiece mounted on the rotor, and the base of the theodolite, the vertical axis and the alidade are made with through holes concentric with the vertical axis of rotation, characterized in that the telescope and alidade are made with the possibility of By setting the optical axis of the telescope upright with the lens up and down, the diameters of the through holes in the base of the theodolite, the vertical axis and the alidade exceed the light diameter of the telescope lens taking into account the angle of the field of vision and the eccentricity of the optical axis of the telescope directed to the nadir relative to the vertical axis of rotation theodolite, and in the telescope is installed with the possibility of changing the grid of threads or an additional grid, conjugated with the main.

  

  https://patents.google.com/patent/RU2079104C1/en?q=THEODOLITE&oq=THEODOLITE&page=2