JPS4881562A - - Google Patents

Info

Publication number
JPS4881562A
JPS4881562A JP47121741A JP12174172A JPS4881562A JP S4881562 A JPS4881562 A JP S4881562A JP 47121741 A JP47121741 A JP 47121741A JP 12174172 A JP12174172 A JP 12174172A JP S4881562 A JPS4881562 A JP S4881562A
Authority
JP
Japan
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP47121741A
Priority date (The priority date is an assumption and is not a legal conclusion. 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 filed Critical
Publication of JPS4881562A publication Critical patent/JPS4881562A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • G02B27/648—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake for automatically maintaining a reference alignment, e.g. in self-levelling surveying instruments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)
JP47121741A 1971-12-07 1972-12-06 Pending JPS4881562A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPA728871 1971-12-07
AUPA908272 1972-05-25

Publications (1)

Publication Number Publication Date
JPS4881562A true JPS4881562A (ja) 1973-10-31

Family

ID=25641966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP47121741A Pending JPS4881562A (ja) 1971-12-07 1972-12-06

Country Status (6)

Country Link
US (1) US3807869A (ja)
JP (1) JPS4881562A (ja)
CA (1) CA977137A (ja)
DE (1) DE2258700A1 (ja)
FR (1) FR2162534B1 (ja)
GB (1) GB1349438A (ja)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149321A (en) * 1977-03-15 1979-04-17 Kivioja Lassi A Mercury leveling instruments
FR2422182A1 (fr) * 1978-04-03 1979-11-02 Sopelem Instrument optique d'observation
SE431021B (sv) * 1979-06-14 1983-12-27 Bofors Ab Automatiskt riktinstrument for en artilleripjes
SE420648B (sv) * 1980-03-26 1981-10-19 Bo Nordgren Anordning for lutningsinstellning
GB2160995A (en) * 1984-06-30 1986-01-02 Francis Albert Shaw Innes Optical instrument stabiliser
US5724744A (en) * 1993-04-07 1998-03-10 Micro Italiana S.P.A. Self-leveling device mounted on a rotating base for projecting laser rays
US5541727A (en) * 1993-08-27 1996-07-30 Rando; Joseph F. Automatic level and plumb tool
US5459932A (en) * 1993-08-27 1995-10-24 Levelite Technology, Inc. Automatic level and plumb tool
US5617202A (en) * 1994-05-24 1997-04-01 Levelite Technology, Inc. Diode laser co-linear and intersecting light beam generator
US5610711A (en) * 1995-12-22 1997-03-11 Levelite Technology Inc. Remote pointing system for a self-leveling laser instrument
US6542304B2 (en) * 1999-05-17 2003-04-01 Toolz, Ltd. Laser beam device with apertured reflective element
US7134211B2 (en) 2004-03-18 2006-11-14 Black & Decker Inc. Laser level
US7181854B2 (en) 2004-08-17 2007-02-27 Eastway Fair Company Limited Laser leveling device having a suction mounting arrangement
US20080052926A1 (en) * 2006-09-05 2008-03-06 Eastway Fair Company Limited Gravity dial level indicator for line generator
US20080052927A1 (en) * 2006-09-05 2008-03-06 Eastway Fair Company Limited Self-leveling line generator
US20080062669A1 (en) * 2006-09-07 2008-03-13 Parel Thomas M Gravity dial level indicator for line generator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1531693A (en) * 1921-11-12 1925-03-31 Leon F Douglass Method and apparatus for producing novel and double-image effects in photography
DE550075C (de) * 1930-09-13 1932-05-13 Ludwig Becker Dr Kuenstlicher Horizont
US3013464A (en) * 1955-05-05 1961-12-19 Keuffel & Esser Co Optical level
CH365228A (de) * 1957-05-27 1962-10-31 Magyar Optikai Muevek Fernrohr mit einem Lichtlenkpendel
JPS51466B1 (ja) * 1969-07-31 1976-01-08

Also Published As

Publication number Publication date
US3807869A (en) 1974-04-30
CA977137A (en) 1975-11-04
FR2162534A1 (ja) 1973-07-20
FR2162534B1 (ja) 1976-06-11
DE2258700A1 (de) 1973-06-14
GB1349438A (en) 1974-04-03

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