US1998187A - Improved optical combination - Google Patents

Improved optical combination Download PDF

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Publication number
US1998187A
US1998187A US757025A US75702534A US1998187A US 1998187 A US1998187 A US 1998187A US 757025 A US757025 A US 757025A US 75702534 A US75702534 A US 75702534A US 1998187 A US1998187 A US 1998187A
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US
United States
Prior art keywords
light
foci
optical combination
improved optical
lamp
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 - Lifetime
Application number
US757025A
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English (en)
Inventor
Conti James Tiburce Felix
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.)
ECLAIRAGE RATIONNEL SPER SOC P
POUR L'ECLAIRAGE RATIONNEL SPER Ste
Original Assignee
ECLAIRAGE RATIONNEL SPER SOC P
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 ECLAIRAGE RATIONNEL SPER SOC P filed Critical ECLAIRAGE RATIONNEL SPER SOC P
Application granted granted Critical
Publication of US1998187A publication Critical patent/US1998187A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
    • H01K1/325—Reflecting coating

Definitions

  • the invention has for its object an optical of light has two boundary rays and 12, while combination which provides a pencil or beam or the second part 3 oi. the reflector provides the light to be obtained that is flattened and wider pencil wh as t undary rays a and 0- than with prior devices and can be carried into It will therefore be seen that the part of the client by the construction of an incandescent pen il l a d t d hasali ht d ns ty 5 electric lamp.
  • arefiector is formed originate from the tw parts of t e fl c 2 by a surface of revolution generated by the rotaa d 3, While the P between b and c 1S 1858 tion about a vertical axis of a suitable curve havil umi teding two difi'erent foci.
  • This reflector is combined By suitably selecting the relation of the focal 10 with a source of light arranged on an arc of a lengths of two parabolic branches of the curved circle located in the plane containing the foci. line, as well as the position of the source of light,
  • the source of light can be surfaces ab and be may be modified. arranged between the foci.
  • the bulb I is formed by the The invention thus defined may be carried into rotation of the two parabola branches 2 and 3 efiect very simply and economically by a simple about a vertical axis XX.
  • These two parabola incandescent electric lamp having a bulb having branches have their foci at f and respectively.
  • the reflecting suriace of the bulb is having difiering focal distances, combined with formed by the rotation of the curved linev 2-3, 25 a filament arranged on an arc of a circle and it is evident that the foci will not be points, as is placed as has been stated, the part of the bulb the case in ordinary head-lamps, but circles of containing the source of light being silvered to foci f and f concentric to the wall 5 of the bulb. constitute the reflector.
  • This mode of carrying The filament 6 will then be arranged on a curved out the invention enables a true head-lamp to line concentric to the axis of revolution and sit- 30 be obtained with a simple incandescent electricuated between the two circles of foci f and f lamp.
  • Figure 4 is a plan view of this lamp taken on The optical combination thus obtained gives a the plane of the filament.
  • luminous beam or pencil which is flattened and 45'
  • the numerals 2 and 3 indicate the wider than with certain prior devices and thus two parabolic branches of the curved line has great advantages and permits of numerous which have generated the reflector shown in applications; for example, a lamp thus conon in Fi u e Ea h of these two branches structed and placed on a motor-car will illumi- 0f the curved line has its i d idua focus f or f, nate the road over a great width with the advanthe light source being placed between the two tage of directing all the light toward the ground foci at 4. and avoiding dazzle.
  • the pencil or beam in an advantageous manner and enables wide 55 surfaces to be illuminated, which is of great advantage in illuminating, for instance, a platform, by arranging a small number of lamps in the troughs employed in indirect lighting.
  • An electric lamp comprising a bulb having two I adjacent reflecting surface portions, said portions being of the shape of a part of a surface of revolution generated by a planar curved line of two parabolic portions moving about a common axis of revolution, the two parabolic portions having differing focal distances, and. a filament constructed and arranged as the arc of a circle concentric to said axis of revolution and located 10 between said tool.

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US757025A 1933-12-01 1934-12-11 Improved optical combination Expired - Lifetime US1998187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1998187X 1933-12-01

Publications (1)

Publication Number Publication Date
US1998187A true US1998187A (en) 1935-04-16

Family

ID=9682891

Family Applications (1)

Application Number Title Priority Date Filing Date
US757025A Expired - Lifetime US1998187A (en) 1933-12-01 1934-12-11 Improved optical combination

Country Status (5)

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US (1) US1998187A (US20100268047A1-20101021-C00003.png)
BE (1) BE408568A (US20100268047A1-20101021-C00003.png)
DE (1) DE642480C (US20100268047A1-20101021-C00003.png)
FR (1) FR784648A (US20100268047A1-20101021-C00003.png)
GB (1) GB440455A (US20100268047A1-20101021-C00003.png)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441824A (en) * 1943-10-16 1948-05-18 Westinghouse Electric Corp Reflector lamp
US2441823A (en) * 1943-02-01 1948-05-18 Westinghouse Electric Corp Reflector lamp and optical system
US2501140A (en) * 1947-10-17 1950-03-21 Pique Baudilio Jesus Electric-light projecting reflector
US2766394A (en) * 1955-02-18 1956-10-09 Darsie George Headlight
US2799791A (en) * 1952-03-04 1957-07-16 Philips Corp Electric incandescent lamp comprising a reflector
US2843778A (en) * 1952-12-22 1958-07-15 Gen Motors Corp Light bulb

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2529416A1 (de) * 1975-07-02 1977-01-13 Reunies De Lampes Electr Issy Gluehlampe mit reflektierender kappe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441823A (en) * 1943-02-01 1948-05-18 Westinghouse Electric Corp Reflector lamp and optical system
US2441824A (en) * 1943-10-16 1948-05-18 Westinghouse Electric Corp Reflector lamp
US2501140A (en) * 1947-10-17 1950-03-21 Pique Baudilio Jesus Electric-light projecting reflector
US2799791A (en) * 1952-03-04 1957-07-16 Philips Corp Electric incandescent lamp comprising a reflector
US2843778A (en) * 1952-12-22 1958-07-15 Gen Motors Corp Light bulb
US2766394A (en) * 1955-02-18 1956-10-09 Darsie George Headlight

Also Published As

Publication number Publication date
BE408568A (US20100268047A1-20101021-C00003.png) 1935-04-30
DE642480C (de) 1937-03-05
GB440455A (en) 1935-12-31
FR784648A (fr) 1935-07-22

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