GB343149A - Means for testing and adjusting the focus of lamps - Google Patents

Means for testing and adjusting the focus of lamps

Info

Publication number
GB343149A
GB343149A GB3487129A GB3487129A GB343149A GB 343149 A GB343149 A GB 343149A GB 3487129 A GB3487129 A GB 3487129A GB 3487129 A GB3487129 A GB 3487129A GB 343149 A GB343149 A GB 343149A
Authority
GB
United Kingdom
Prior art keywords
lamp
rays
apertures
marks
screen
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
GB3487129A
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.)
ALBERT RUSSELL SQUYER
Original Assignee
ALBERT RUSSELL SQUYER
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 ALBERT RUSSELL SQUYER filed Critical ALBERT RUSSELL SQUYER
Priority to GB3487129A priority Critical patent/GB343149A/en
Priority to FR687759D priority patent/FR687759A/en
Priority to DE1930516663D priority patent/DE516663C/en
Publication of GB343149A publication Critical patent/GB343149A/en
Expired legal-status Critical Current

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)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Ladders (AREA)

Abstract

343,149. Testing optical adjustments of lamps. SQUYER, A. R., 1601, Lowell Avenue, Springfield, Illinois, U.S.A. Nov. 14, 1929, No. 34871. [Class 97 (i).] Apparatus for testing the optical adjustments of lamps, e.g. motor car headlights, consists of a boxlike structure carried by a support, and provided with apertures through which a beam of light from the lamp may be projected on to a screen having index marks, the screen being viewed through an additional aperture. An adjustable mirror in the structure provides a means for ascertaining the distance in front of the lamp at which the beam will strike the ground. A sheet metal box-like structure 1, having apertures 2 at one end for the admission of rays of light from the lamp 3 to be tested, is adjustably mounted on a stand by bars 10, so that operation of the screw 11 raises and lowers the box 1 while keeping it horizontal. The rays from the lamp are reflected from an adjustable mirror 4 on to a ground glass screen 5, having index marks 14, 15 corresponding to the apertures 2. A cam 13 on a shaft 16 which also carries a dial 19 bears against one end of the pivoted mirror 4 so that bv rotation of the shaft 16 the rays from the lamp are brought into coincidence with the marks 14, 15, observation being made through the opening 31. A scale on the dial 19 in conjunction with a pointer 20 indicates the distance ahead of the lamp 3 at which the rays will strike a flat road. In use, the apparatus is wheeled up to the lamp 3 and its height adjusted so that rays from the lamp 3 through additional apertures 22 will fall on windows 26 in the side of the box in coincidence with the arrows 27, which then point to the centre of the lamp 3. This height adjustment alters the position of the pointer 20, which is connected to the bars 10, as shown. The mirror 4 is then adjusted until the rays through the apertures 2 are reflected on to the marks 14, 15. Should the rays be closer together or further apart on the screen than the marks 14, 15 the lamp is adjusted in its casing until coincidence is effected. The lamp may also be adjusted until the rays will strike the ground at the desired distance ahead. To facilitate moving the apparatus wheels 9 are fitted on a pivoted lever 24 which is depressed by raising the handle 28, lifting the stand off its feet 8 and supporting it on the wheels 9.
GB3487129A 1929-11-14 1929-11-14 Means for testing and adjusting the focus of lamps Expired GB343149A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3487129A GB343149A (en) 1929-11-14 1929-11-14 Means for testing and adjusting the focus of lamps
FR687759D FR687759A (en) 1929-11-14 1930-01-06 Lamp focus testing and adjustment device
DE1930516663D DE516663C (en) 1929-11-14 1930-01-17 Device for setting the light source in the focus of headlight reflectors and for setting the headlights in a certain angular position relative to the road

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3487129A GB343149A (en) 1929-11-14 1929-11-14 Means for testing and adjusting the focus of lamps

Publications (1)

Publication Number Publication Date
GB343149A true GB343149A (en) 1931-02-16

Family

ID=10370946

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3487129A Expired GB343149A (en) 1929-11-14 1929-11-14 Means for testing and adjusting the focus of lamps

Country Status (3)

Country Link
DE (1) DE516663C (en)
FR (1) FR687759A (en)
GB (1) GB343149A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025392C1 (en) * 1990-08-10 1991-11-14 Hella Kg Hueck & Co, 4780 Lippstadt, De

Also Published As

Publication number Publication date
DE516663C (en) 1931-01-26
FR687759A (en) 1930-08-13

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