GB1516799A – Levels
– Google Patents
GB1516799A – Levels
– Google Patents
Levels
Info
Publication number
GB1516799A
GB1516799A
GB5287376A
GB5287376A
GB1516799A
GB 1516799 A
GB1516799 A
GB 1516799A
GB 5287376 A
GB5287376 A
GB 5287376A
GB 5287376 A
GB5287376 A
GB 5287376A
GB 1516799 A
GB1516799 A
GB 1516799A
Authority
GB
United Kingdom
Prior art keywords
reflectors
optical
self levelling
prism
dec
Prior art date
1976-12-17
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
GB5287376A
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.)
EssilorLuxottica SA
Original Assignee
Essilor International Compagnie Generale dOptique SA
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.)
1976-12-17
Filing date
1976-12-17
Publication date
1978-07-05
1976-12-17
Application filed by Essilor International Compagnie Generale dOptique SA
filed
Critical
Essilor International Compagnie Generale dOptique SA
1976-12-17
Priority to GB5287376A
priority
Critical
patent/GB1516799A/en
1978-07-05
Publication of GB1516799A
publication
Critical
patent/GB1516799A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G02B17/00—Systems with reflecting surfaces, with or without refracting elements
G02B17/02—Catoptric systems, e.g. image erecting and reversing system
G02B17/04—Catoptric systems, e.g. image erecting and reversing system using prisms only
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
Abstract
1516799 Self levelling optical instruments ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D’OPTIQUE) 17 Dec 1976 [18 Dec 1975] 52873/76 Heading G2J [Also in Division G I ] In a self levelling optical sighting apparatus the objectives and eyepiece axes 11, 12 are both parallel and substantially horizontal; and a pendulum 6, 8, bears reflectors 5,10. The optical axis is directed to and returned from a non-pendulous prism 13 by reflectors 5, 10. The system of prisms 4, 13, 5 inverts the image both horizontally and vertically, while adjustment of the separation between reflectors 5, 10 and prism 13 alters the optical path and thereby allows focusing. The pendulous action provides the self levelling property.
GB5287376A
1976-12-17
1976-12-17
Levels
Expired
GB1516799A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB5287376A
GB1516799A
(en)
1976-12-17
1976-12-17
Levels
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB5287376A
GB1516799A
(en)
1976-12-17
1976-12-17
Levels
Publications (1)
Publication Number
Publication Date
GB1516799A
true
GB1516799A
(en)
1978-07-05
Family
ID=10465650
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5287376A
Expired
GB1516799A
(en)
1976-12-17
1976-12-17
Levels
Country Status (1)
Country
Link
GB
(1)
GB1516799A
(en)
Cited By (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0015061A1
(en)
*
1979-01-20
1980-09-03
Fuji Photo Optical Co., Ltd.
Image stabilized optical system
GB2116745A
(en)
*
1982-03-17
1983-09-28
Magyar Optikai Muevek
Level instrument with telescope
GB2126746A
(en)
*
1982-07-23
1984-03-28
Canon Kk
Compensating for optical path length changes
GB2160995A
(en)
*
1984-06-30
1986-01-02
Francis Albert Shaw Innes
Optical instrument stabiliser
US5280387A
(en)
*
1989-09-06
1994-01-18
Asahi Kogaku Kogyo Kabushiki Kaisha
Image stabilizing apparatus
EP0809780A1
(en)
*
1994-10-27
1997-12-03
Yishay Netzer
Compact keplerian telescope
GB2329249A
(en)
*
1997-09-12
1999-03-17
Michael John Smith
Laser levelling device
1976
1976-12-17
GB
GB5287376A
patent/GB1516799A/en
not_active
Expired
Cited By (10)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0015061A1
(en)
*
1979-01-20
1980-09-03
Fuji Photo Optical Co., Ltd.
Image stabilized optical system
GB2116745A
(en)
*
1982-03-17
1983-09-28
Magyar Optikai Muevek
Level instrument with telescope
GB2126746A
(en)
*
1982-07-23
1984-03-28
Canon Kk
Compensating for optical path length changes
GB2160995A
(en)
*
1984-06-30
1986-01-02
Francis Albert Shaw Innes
Optical instrument stabiliser
US5280387A
(en)
*
1989-09-06
1994-01-18
Asahi Kogaku Kogyo Kabushiki Kaisha
Image stabilizing apparatus
US5461513A
(en)
*
1989-09-06
1995-10-24
Asahi Kogaku Kogyo Kabushiki Kaisha
Image stabilizing apparatus
EP0809780A1
(en)
*
1994-10-27
1997-12-03
Yishay Netzer
Compact keplerian telescope
EP0809780A4
(en)
*
1994-10-27
1998-10-07
Yishay Netzer
Compact keplerian telescope
GB2329249A
(en)
*
1997-09-12
1999-03-17
Michael John Smith
Laser levelling device
GB2329249B
(en)
*
1997-09-12
2002-03-20
Michael John Smith
Levelling device
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Legal Events
Date
Code
Title
Description
1978-11-08
PS
Patent sealed
1985-08-14
PCNP
Patent ceased through non-payment of renewal fee
