Surveying machine for construction work

• US 5,218,770 A
• Filed: 10/31/1991
• Issued: 06/15/1993
• Est. Priority Date: 11/27/1990
• Status: Expired due to Term

• Current Assignee: Asahi Seimitsu Kabushiki Kaisha (Hoya Corporation)
• Original Assignee: Asahi Seimitsu Kabushiki Kaisha (Hoya Corporation)
• Inventors: Toga, Noriyuki
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): Dowling, William C.
• Application Number:
  US07/785,768
• Time in Patent Office: 593 Days
• Field of Search: 33/276, 33/277, 33/278, 33/279, 33/280, 33/227, 33/DIG. 21, 33/286, 356/140, 356/144, 356/145, 356/146, 356/138
• US Class Current: 33/276
• CPC Class Codes: G01C 15/004 Reference lines, planes or sectors
• CPC Class Codes: Y10S 33/21 with laser

Abstract

In the surveying for construction work carried out prior to actual construction to set up new stations serving as references of the construction work, measurements to set up various angles are contemplated, but it will be readily understood, from the viewpoint of many buildings or structure being based on the right angles, that most angle measerments are made to set up the right angles. A surveying machine for construction work is provided with a rotating projector adapted for rotational projection of at least a pair of laser beams in planes being perpendicular to each other so that new stations in a vertical plane, new station in another vertical plane being perpendicular to the first-mentioned vertical plane or new stations in a horizontal plane may be easily set up merely by observing the pair of laser beams intersecting perpendicularly to each other.

Claims

1. A surveying machine for construction work comprising rotating projector means for simultaneously rotationally projecting at least a pair of laser beams in at least two generally perpendicular planes, the rotating projector means comprises at least two two-face reflector members, each reflector member reflecting one of the laser beams, at least two light sources, each of the two-face reflector members having one light source associated therewith, the light sources each emitting laser light.

2. The surveying machine as recited in claim 1, further comprising a radiant lens positioned between each light source and the associated two-face reflector, the rotating projector means further comprises drive means for rotating each of the two-face reflector members.

3. A surveying machine for construction work comprising rotating projector means for simultaneously rotationally projecting at least a pair of laser beams in at least two generally perpendicular planes, the rotating projector means comprises at least two two-face reflector members, each reflector member reflecting one of the laser beams, the surveying machine has two two-face reflector members, a reflector device and a single light source for emitting laser light, some of the laser light emitted by the light source is reflected by the reflector device to one of the two-face reflector members while other laser light is transmitted through the reflector device to the other two-face reflector member, the reflector device being one of a semi-transmissive reflector and a prism, the rotating projector means further comprises drive means for rotating each of the two-face reflector members.

4. A surveying machine for construction work comprising rotating projector means for simultaneously rotationally projecting at least a pair of laser beams in at least two generally perpendicular planes, the rotating projector means comprises two two-face reflector members, each reflector member reflecting one of the laser beams, the surveying machine further comprising a reflector device and a single light source for emitting laser light, one of the two-face reflector members receives light reflected vertically from the reflector device to thereby emit a laser beam in a generally horizontal plane from the machine while the other of the two-face reflector members receives light transmitted through the reflector device to thereby emit a laser beam in a generally vertical plane from the machine, the reflector device being one of a semi-transmissive reflector and a prism, the rotating projector means further comprises drive means for rotating each of the two-face reflector members.

5. A surveying machine for construction work comprising rotating projector means for simultaneously rotationally projecting at least a pair of laser beams in at least two generally perpendicular planes, the rotating projector means comprises at least two two-face reflector members, each reflector member reflecting one of the laser beams, the surveying machine further comprising a reflector device and a single light source for emitting laser light, first and second two-face reflector members being provided, the first two-face reflector member receives light reflected from the reflector device to thereby emit a first laser beam in a generally vertical plane from the machine while the second two-face reflector member receives light transmitted through the reflector device to thereby emit a second laser beam in a generally vertical plane from the machine, the reflector device being one of a semi-transmissive reflector and a prism, the surveying machine further comprising a reflector for receiving the laser light reflected by the reflector device and for emitting the laser light to the first two-face reflector, the surveying machine further comprising a third two-face reflector member, the third two-face reflector member receives laser light transmitted through the reflector device and reflects the light to the second two-faced reflector.

6. The surveying machine as recited in claim 5, wherein the rotating projector means further comprises drive means for rotating each of the two-face reflector members.

7. A surveying machine for construction work comprising rotating projector means for simultaneously rotationally projecting at least a pair of laser beams in at least two generally perpendicular planes, the rotating projector means comprises at least two two-face reflector members, each reflector member reflecting one of the laser beams, the surveying machine further comprising a first and second reflector device and a single light source for emitting laser light, the laser light being divided by the first reflector device such that about two-thirds of the light is transmitted therethrough and one-third of the light is reflected thereby to one of the two-face reflector members, the second reflector device receives the two-thirds of the light from the first reflector device and reflects some of this light to a second one of the two-face reflector members and remaining light being transmitted through the second reflector device to a third one of the two-face reflectors such that three laser beams are emitted from the machine, the reflector devices being at least one of a semi-transmissive reflector and a prism.

8. The surveying machine as recited in claim 7, wherein one of the three laser beams is located in a generally horizontal plane while the other two laser beams are located in generally vertical planes.

9. The surveying machine as recited in claim 7, wherein the rotating projector means further comprises drive means for rotating each of the three two-face reflector members.

10. A surveying machine for construction work comprising rotating projector means for simultaneously rotationally projecting at least a pair of laser beams in at least two generally perpendicular planes, the rotating projector means comprises at least two two-face reflector members, each reflector member reflecting one of the laser beams, the surveying machine further comprising a reflector device and a single light source for emitting laser light, some of the laser light being reflected by the reflector device to a first two-face reflector member while other laser light is transmitted through the reflector device to a second two-face reflector member, a radiant lens being provided between the single light source and the reflector device and the reflector device being one of a semi-transmissive reflector and a prism, the rotating projector means further comprises drive means for rotating the first and second two-face reflector members.

11. A surveying machine for construction work comprising rotating projector means for simultaneously rotationally projecting at least a pair of laser beams in at least two generally perpendicular planes, the rotating projector means comprises at least two two-face reflector members, each reflector member reflecting one of the laser beams, the surveying machine further comprising a compensator for maintaining a rotationally projected laser beam in one of a generally horizontal and generally vertical plane regardless of tilting of the surveying machine.