GB515340A - Improvements in automobile headlight-testers - Google Patents
Improvements in automobile headlight-testersInfo
- Publication number
- GB515340A GB515340A GB1838438A GB1838438A GB515340A GB 515340 A GB515340 A GB 515340A GB 1838438 A GB1838438 A GB 1838438A GB 1838438 A GB1838438 A GB 1838438A GB 515340 A GB515340 A GB 515340A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- lens
- light
- casing
- until
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/06—Testing the alignment of vehicle headlight devices
- G01M11/061—Details of the mechanical construction of the light measuring system
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
515,340. Photo-electric headlight-testers. BURGESS, A. F. (Weaver Manufacturing Co.). June 21, 1938, No. 18384. [Class 40 (iii)] [Also in Group XX] Manufacturing In apparatus for testing the headlights of automobiles of the kind including a photoelectric cell for measuring the intensity of the beam of light emitted therefrom, the cell 39, Fig. 1, is vertically adjustable on an optical device which is adjustable both vertically and horizontally upon a portable support 13, and which includes a casing 23, Fig. 3, having a lens 26 and a mirror 27 for projecting an image of the headlights on to a ground-glass screen 28. The screen bears cross-lines 29, 31, Fig. 4, for indicating when the centre of the lens is directly in front of the centre of the headlight. The cell 39 is enclosed in a casing 37 having an aperture 38 and vertically slidable on the casing 23 which is slidable along horizontal bars 18, 19 mounted on an adjustable frame 17 connected by links 15 to the support 13. The frame carries a projection screen having an horizontal mark 22 thereon in alignment with the lens 26. In operation, the apparatus is placed in front of the headlight and the frame 17 is adjusted until the image 51, Fig. 4, formed by the lens is at the centre of the cross-lines 29, 31 in which position the lens is at the same height as, and directly in front of. the light. The apparatus is then moved to or from the light until a red image 52 formed by light reflected from a mirror 33 through a red lens 34 is in the line 29, in which position the apparatus is at a predetermined distance from the light. Sights 47, 48 permit accurate alignment of the apparatus with the longitudinal axis of the automobile. The cell is then adjusted vertically on the casing 23, which is simultaneously adjusted laterally, until the reading of the ammeter 42 connected to the cell is a maximum, when the direction of the beam may be read on a scale marked on the casing. The cell may then be located in a position corresponding to the desired direction of the beam, and the light adjusted until the cell gives a maximum reading. The intensity of the beam may also be measured by focusing the light until a maximum reading is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1838438A GB515340A (en) | 1938-06-21 | 1938-06-21 | Improvements in automobile headlight-testers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1838438A GB515340A (en) | 1938-06-21 | 1938-06-21 | Improvements in automobile headlight-testers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB515340A true GB515340A (en) | 1939-12-01 |
Family
ID=10111529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1838438A Expired GB515340A (en) | 1938-06-21 | 1938-06-21 | Improvements in automobile headlight-testers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB515340A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170268862A1 (en) * | 2016-03-17 | 2017-09-21 | American Automobile Association, Inc. | Headlamp aiming tool and method |
CN108572059A (en) * | 2017-08-31 | 2018-09-25 | 常州星宇车灯股份有限公司 | A kind of lens of car light self-focusing detection device and its application method |
-
1938
- 1938-06-21 GB GB1838438A patent/GB515340A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170268862A1 (en) * | 2016-03-17 | 2017-09-21 | American Automobile Association, Inc. | Headlamp aiming tool and method |
US10054433B2 (en) * | 2016-03-17 | 2018-08-21 | American Automobile Association, Inc. | Headlamp aiming tool and method |
CN108572059A (en) * | 2017-08-31 | 2018-09-25 | 常州星宇车灯股份有限公司 | A kind of lens of car light self-focusing detection device and its application method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2406451A (en) | Optical means for inspection | |
GB1332419A (en) | Electro-optical feeler of probe devices | |
US3746449A (en) | Headlight tester | |
US1934582A (en) | Projection apparatus | |
US2470090A (en) | Device for optically checking dirigible wheels | |
US2484103A (en) | Projection comparator for objects in relation to spaced drawings or reticles | |
US2640392A (en) | Apparatus for measuring the focal length of lenses | |
GB515340A (en) | Improvements in automobile headlight-testers | |
US2381634A (en) | Testing device | |
US2474602A (en) | Length measuring machine having lens and reflector means | |
US2411879A (en) | Headlight tester | |
GB719700A (en) | Method of and apparatus for testing lenses | |
GB591991A (en) | Improvements in or relating to measuring the focal length of lenses | |
US2929295A (en) | Night visibility meter | |
US2624237A (en) | Lens testing instrument | |
US3597092A (en) | Instrument for measuring a projected distance | |
US2958134A (en) | Headlight testing apparatus and method | |
US1928001A (en) | Projection indicator measuring instrument | |
US2128543A (en) | Headlight tester | |
US1987692A (en) | Light testing apparatus | |
GB1019540A (en) | A method and apparatus for determining the difference in area of an article from an article of known area | |
SU600388A1 (en) | Plane simulator for specifying planenes meters | |
GB874119A (en) | Improvements in or relating to focimeters | |
GB570022A (en) | A projection system for the inspection of internal surfaces | |
US3658419A (en) | Device to facilitate the focusing of a distance meter |