GB448412A - An improved projecting apparatus for light or heat rays or sound waves - Google Patents

An improved projecting apparatus for light or heat rays or sound waves

Info

Publication number
GB448412A
GB448412A GB2530234A GB2530234A GB448412A GB 448412 A GB448412 A GB 448412A GB 2530234 A GB2530234 A GB 2530234A GB 2530234 A GB2530234 A GB 2530234A GB 448412 A GB448412 A GB 448412A
Authority
GB
United Kingdom
Prior art keywords
light
sound waves
projecting apparatus
focus
heat rays
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
GB2530234A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2530234A priority Critical patent/GB448412A/en
Publication of GB448412A publication Critical patent/GB448412A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

448,412. Acoustic reflectors. LEROUDIER, H., Chemin du Luizet, Villeurbanne, Lyons, France. Sept. 3, 1934, No. 25302. Void [Abridged as open to inspection under Sect. 91 of the Acts, March 4, 1935]. [Class 13] [See also Group XI] A sound reflector is formed by rotating a parabolic curve 1, 1a about an axis Y Y which passes through the focus F and forms an angle (e.g. 45‹) with the axis x x of the parabola, the portions surrounding the focus being cut away to form parts A, B, Fig. 4, which are used together . or separately. Fig. 4 also shows the use in combination of two such sets of parts A, B of different dimensions. In a modification, a pair of relatively inclined parabolic curves are translated along a common focal line to form a troughshaped reflector.
GB2530234A 1934-09-03 1934-09-03 An improved projecting apparatus for light or heat rays or sound waves Expired GB448412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2530234A GB448412A (en) 1934-09-03 1934-09-03 An improved projecting apparatus for light or heat rays or sound waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2530234A GB448412A (en) 1934-09-03 1934-09-03 An improved projecting apparatus for light or heat rays or sound waves

Publications (1)

Publication Number Publication Date
GB448412A true GB448412A (en) 1935-03-04

Family

ID=10225498

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2530234A Expired GB448412A (en) 1934-09-03 1934-09-03 An improved projecting apparatus for light or heat rays or sound waves

Country Status (1)

Country Link
GB (1) GB448412A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2653030A1 (en) * 1975-11-25 1977-06-02 Lampes Sa Floodlight twin reflector construction - has parabolic sections mounted around light source to reduce multiple reflections
DE3203284A1 (en) * 1982-02-01 1983-08-18 Siemens AG, 1000 Berlin und 8000 München WIDE-RADIATION, ROTATION-SYMMETRIC STREET LAMP
WO2023066441A1 (en) 2021-10-18 2023-04-27 Merit Automotive Electronics Systems S.L.U. Reflector lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2653030A1 (en) * 1975-11-25 1977-06-02 Lampes Sa Floodlight twin reflector construction - has parabolic sections mounted around light source to reduce multiple reflections
DE3203284A1 (en) * 1982-02-01 1983-08-18 Siemens AG, 1000 Berlin und 8000 München WIDE-RADIATION, ROTATION-SYMMETRIC STREET LAMP
WO2023066441A1 (en) 2021-10-18 2023-04-27 Merit Automotive Electronics Systems S.L.U. Reflector lamp

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