GB774437A - Auxiliary instrument for the use with levelling instruments - Google Patents

Auxiliary instrument for the use with levelling instruments

Info

Publication number
GB774437A
GB774437A GB3297/55A GB329755A GB774437A GB 774437 A GB774437 A GB 774437A GB 3297/55 A GB3297/55 A GB 3297/55A GB 329755 A GB329755 A GB 329755A GB 774437 A GB774437 A GB 774437A
Authority
GB
United Kingdom
Prior art keywords
level
sight
line
prisms
instrument
Prior art date
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.)
Expired
Application number
GB3297/55A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 by Carl Zeiss AG filed Critical Carl Zeiss AG
Priority to GB3297/55A priority Critical patent/GB774437A/en
Publication of GB774437A publication Critical patent/GB774437A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01C5/02—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels involving automatic stabilisation of the line of sight
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0875—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements
    • G02B26/0883—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements the refracting element being a prism
    • G02B26/0891—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements the refracting element being a prism forming an optical wedge

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)

Abstract

774,437. Surveyor's levels. ZEISSSTIFTUNG, C., [trading as ZEISS, C. (Firm of)]. Feb. 4, 1955 [Feb. 20, 1954], No. 3297/55. Classes 97(1) and 97(2) Tq assist in the measurement of the intercept of a measuring staff used in a surveyor's level the latter has arranged in front of it optical elements having a wedge effect and adapted to deflect the line of sight of the level by any suitable angle in the vertical direction. Fig. 1 shows the invention applied to a level having a pendulously suspended reflecting prism 42 arranged to maintain the line of sight horizontal when the instrument is tilted. Before the objective 31 are two prisms mounted in bearings 11 and 12 and simultaneously rotatable through equal angles in opposite directions by a gear 13 operated by a knob 15, such rotations changing the line of sight in the vertical plane. The member 2 carrying the prisms is rotatable through 180 degrees about the optical axis on a member 3 supported by the casing 30 of the level so that the line of sight can be changed from a certain angle upwards to the same angle downwards. The field of view of the eyepiece 32 is shown in Fig. 4, 22, 23, 24 and 25 being stadia lines on the graticule 35 (Fig. 1) of the instrument and 22<SP>1</SP>, 23<SP>1</SP> the images of marks on a distant measuring staff framed by the level. Rotation of the prisms 8 enables. the images 22<SP>1</SP>, 23<SP>1</SP> to be moved relative to the stadia lines until one of the latter coincides with a wholenumber mark on the image then the intercept of the image by the stadia lines may be read more easily.
GB3297/55A 1955-02-04 1955-02-04 Auxiliary instrument for the use with levelling instruments Expired GB774437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3297/55A GB774437A (en) 1955-02-04 1955-02-04 Auxiliary instrument for the use with levelling instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3297/55A GB774437A (en) 1955-02-04 1955-02-04 Auxiliary instrument for the use with levelling instruments

Publications (1)

Publication Number Publication Date
GB774437A true GB774437A (en) 1957-05-08

Family

ID=40847093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3297/55A Expired GB774437A (en) 1955-02-04 1955-02-04 Auxiliary instrument for the use with levelling instruments

Country Status (1)

Country Link
GB (1) GB774437A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933814A (en) * 1958-08-19 1960-04-26 Thompson Edgar Hynes Pendulum devices
US3364810A (en) * 1968-01-23 Hickerson Instr Co Inc Surveyor's automatic level
DE1262617B (en) * 1958-05-16 1968-03-07 Jenoptik Jena Gmbh Broken telescopic sight that can be pivoted in its bearings around a horizontal axis and with its bearings around a vertical axis
US4364628A (en) * 1979-09-05 1982-12-21 The Marconi Company Limited Optical sights
GB2268285A (en) * 1989-09-06 1994-01-05 Asahi Optical Co Ltd Image stabilizing apparatus
US5280387A (en) * 1989-09-06 1994-01-18 Asahi Kogaku Kogyo Kabushiki Kaisha Image stabilizing apparatus
CN109405796A (en) * 2018-12-03 2019-03-01 大连圣博尔测绘仪器科技有限公司 Novel electron level
CN110595510A (en) * 2019-10-10 2019-12-20 河南省计量科学研究院 Rotary bar code ruler for calibrating electronic i-angle and sight distance errors of digital level

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364810A (en) * 1968-01-23 Hickerson Instr Co Inc Surveyor's automatic level
DE1262617B (en) * 1958-05-16 1968-03-07 Jenoptik Jena Gmbh Broken telescopic sight that can be pivoted in its bearings around a horizontal axis and with its bearings around a vertical axis
US2933814A (en) * 1958-08-19 1960-04-26 Thompson Edgar Hynes Pendulum devices
US4364628A (en) * 1979-09-05 1982-12-21 The Marconi Company Limited Optical sights
GB2268285A (en) * 1989-09-06 1994-01-05 Asahi Optical Co Ltd Image stabilizing apparatus
US5280387A (en) * 1989-09-06 1994-01-18 Asahi Kogaku Kogyo Kabushiki Kaisha Image stabilizing apparatus
GB2268285B (en) * 1989-09-06 1994-05-25 Asahi Optical Co Ltd Image stabilizing apparatus
US5461513A (en) * 1989-09-06 1995-10-24 Asahi Kogaku Kogyo Kabushiki Kaisha Image stabilizing apparatus
CN109405796A (en) * 2018-12-03 2019-03-01 大连圣博尔测绘仪器科技有限公司 Novel electron level
CN110595510A (en) * 2019-10-10 2019-12-20 河南省计量科学研究院 Rotary bar code ruler for calibrating electronic i-angle and sight distance errors of digital level
CN110595510B (en) * 2019-10-10 2024-03-15 河南省计量测试科学研究院 Digital level electronic angle and visual range error detecting rotary bar code ruler

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