US3732415A - Headlight construction - Google Patents

Headlight construction Download PDF

Info

Publication number
US3732415A
US3732415A US00075503A US3732415DA US3732415A US 3732415 A US3732415 A US 3732415A US 00075503 A US00075503 A US 00075503A US 3732415D A US3732415D A US 3732415DA US 3732415 A US3732415 A US 3732415A
Authority
US
United States
Prior art keywords
socket
headlight
reflector
bulb
flange
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
US00075503A
Other languages
English (en)
Inventor
G Lindae
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3732415A publication Critical patent/US3732415A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/194—Bayonet attachments

Definitions

  • Mounting means removably mounts the bulb in the opening in seal-tight cooperation of the socket and flange with the reflector so that the interior of the reflector is pressure-tightly and sealtightly closed with respect to the ambient atmosphere.
  • the present invention relates generally to headlight constructions, and more particularly to a headlight for automotive vehicles or the like.
  • the other type of headlight construction is the more conventional one which has essentially seen use since the time automotive vehicles were first provided with headlights. Specifically, it utilizes a cupped reflector the open side of which is provided for protective and for light-dispersing purposes with a lens of glass or synthetic plastic material, whereas the crown of the cupped reflector is provided with an opening through which an incandescent bulb is inserted into the interior of the reflector. If damage results to the bulb for any reason, for instance if the filament burns out, the bulb is simply replaced with a new one. It is hardly necessary to emphasize that the expense of replacing one such bulb with another is substantially smaller than the expense involved in replacing a sealed-beam unit with another.
  • the present invention is concerned with the second type of headlight construction, that is the type utilizing a replaceable incandescent bulb as opposed to the sealed-beam type of unit.
  • the reflectors In the type of headlight construction to which the present invention is directed, it is customary in modern practice to manufacture the reflectors by a drawing process from sheet steel. This is then coated with a special lacquer and the interior surface of the reflector receives by vacuum-deposition a reflective layer of aluminum. This very thin aluminum layer is highly susceptible to moisture, which damages it rapidly, then of course making the replacement of the entire reflector with a new one an imperative.
  • the deposited reflective aluminum layer is usually coated with a thin layer of quartz. This has some advantages but it has been found that in many instances the protective quartz layer -which necessarily is also very thin--is still not sufficient to protect the aluminum layer properly.
  • an object of the present invention to provide an improved headlight which entirely and completely protects the deposited metallic reflective layer on the inner reflective surface of its reflector against deleterious matter present in the ambient atmosphere.
  • An additional object of the present invention is to provide such a headlight which affords the desired advantages in a very simple and therefore inexpensive construction.
  • a headlight for automotive vehicles or the like which, briefly stated, comprises a cupped reflector having a crown provided with an opening, an open side opposite the crown, and an inner reflecting surface which is to be protected against deleterious matter in the ambient atmosphere.
  • Lens means sealtightly closes the open side and an incadescent bulb is received in the reflector and includes a socket lodged in the opening of the reflector and having a radially projecting circumferential flange encircling and sealtight with the socket.
  • Mounting means removably mounts the bulb in the opening in seal-tight cooperation of the socket and flange with the reflector so that the interior of the latter is thereby sealed with respect to the ambient atmosphere and access of deleterious matter from the ambient atmosphere to the reflecting surface is precluded.
  • the flange is in form of a discrete annular member an inner circumferential marginal zone of which is of frustoconically convergent configuration and surrounds the outer peripheral surface of the socket with which it defines an annular groove of substantially wedge-shaped cross-section, and which groove is completely filled with a substance connecting the flange member with the socket and at the same time providing a seal-tight connection between the two.
  • FIG. 1 is a somewhat diagrammatic axial section through a headlight embodying my invention.
  • FIG. 2 is a somewhat diagrammatic end-elevational view, on an enlarged scale, of the outer end of the bulb socket shown in FIG. 1.
  • reference numeral 1 identifies in toto a parabolic cupped reflector which in conventional manner is produced by a drawing process from sheet steel. It has an open side provided with a cylindrical ring portion 2 in which the lens 3of glass or synthetic plastic material and serving both for protecting the interior of the reflector and for distributing the light in the desired manner-is seal-tightly and pressure-tightly mounted, usually by being bonded or adhesively secured in place.
  • This is conventional and requires no further discussion especially because it is not a part of the present invention.
  • the crown of the reflector l opposite the open side of the latter is provided with a circular opening which terminates in a cylindrical sleeve-like portion 5.
  • An incandescent bulb 4 is arranged in this opening, and more particularly the glass envelope 6 of the bulb 4 is located in the interior of the reflector l and communicates in known manner at its open end with the metallic sleeveshaped socket 7.
  • this is not specifically illustrated because it is a completely conventional expedient in the bulb-making art, and all that need be remembered is that a suitable bonding material bonds the portion of the glass envelope 6 which extends into the socket 7, to the latter.
  • the inner surface of the reflector 1 is provided in conventional manner with a reflecting surface, that is usually with a vapor-deposited layer of aluminum, which must be protected not only against moisture but according to the present invention against other deleterious matter in the ambient atmosphere, such as gaseous pollutants of a nature which could attack and destroy the reflective surface.
  • the socket 7 is provided with a radially projecting circumferential flange 8 which serves for fixing the position of the bulb' tion 5, and in turn the flange 8 abuts against the flange 10.
  • An additional sleeve 11 is inserted into the sleeve 9 from the outside, and an annular sealing ring 12 is compressed between the sleeve 11, the sleeve 9 and the flange 8, thus affording a pressure-tight seal in conjunc tion with the fact that the sleeve 1] is peened over or otherwise suitably retained against displacement in and with reference to the sleeve 9 and the reflector 1.
  • the bulb 4 itself serves to afford a pressure-tight sealtight closure of the interior of the reflector I against the entry into the latter of deleterious matter in the ambient atmosphere.
  • the bulb 4 is not mounted in such a manner that it could not be replaced. Instead, it is a relatively simple matter to embodiment is a discrete annular member which is adhesively bonded to the metallic socket 7, or which is soldered to the latter.
  • embdiment-but not necessarily-a particularly pressure-tight connection between the flange 8 and the socket 7 has been achieved by configurating the inner marginal zone bounding the center opening in the flange 8and identified with reference numeral l3-as a conically convergent portion which defines with the outer circumferential surface bounding the socket 7 an annular groove 14 of preferably substantially wedge-shaped cross-section.
  • This groove 14 is then completely filled with whatever substance is used to unite the flange 8 with the socket 7 both mechanically and seal-tightly, that is either a suitable adhesive or a soft solder substance, identified diagrammatically in the drawing with reference numeral 14a.
  • an evacuation aperture 16 is provided in the insulating member 17 which closes the outer open'end of the socket 7, and through this aperture 16 the interior of the envelope 6 and the socket 7 is evacuated once the two have been bonded togethen'lt is necessary to close the aperture 16 pressure-tightly because otherwise 'it would be possible for gas to diffuse into the interior of the reflector 1 through this opening and from therebetween the juncture of socket 7 and glass envelope 6 through the bonding material which is used to unite the two and which is not gas-tight.
  • the insulating member 17 is of synthetic plastic material and it is therefore advantageous to pressure-tightly seal the evacuation aperture 16 by means of a synthetic plastic material of suitable type which is applied into and over it.
  • the insulating member 17 is adhesively and pressure-tightly bonded to the socket 7 interiorly oras indicated at 18 in the illustrated embodimentexteriorly via a two-component adhesive or any other thermosetting adhesive suitable for the intended purpose.
  • solder connections must be such that the diffusion of gas through them is impossible, for instance by making them in such a manner that the solder material provides a long enough path to make the diffusion of gaseous matter from the exterior to the interior impossible.
  • the reflecting surface in the interior of the reflector l is completely protected against access by deleterious matter present in the ambient atmosphere. This makes it possible to even avoid the provision of the otherwise very customary protective quartz layer over the reflective surface.
  • the construction according to the present invention affords the advantages of the sealed-beam units while being substantially simpler and less expensive to make, therefore being less expensive to sell and having the additional advantage of being reusable if the bulb 4 becomes damaged, simply by replacing the bulb with a new one.
  • a reflector assembly comprising a cup-shaped reflector having a larger-diameter front opening and a smaller-diameter rear opening, a first cylindrical sleeve extending through said rear opening into the interior of said reflector and having at the front end of said sleeve a radially inwardly projecting annular support ledge, said reflector having an inner reflecting surface to be protected from deleterious atmospheric matter; lens means seal-tightly closing said front opening; a bulb assembly comprising a cylindrical socket containing a bulb, an annular member encircling said socket and in cluding a radially outwardly extending stop flange and defining with said socket an annular groove diverging in direction away from said bulb, and a sealing mass in said groove seal-tightly encircling said socket, said bulb assembly being lpcatedin said reflector assembly with said flange abutting against said ledge rearwardly of
  • said flange being a discrete annular member having a center opening bounded by a frustoconically convergent marginal circumferential zone, and said socket extending through said center opening and having an outer peripheral surface defining with said marginal circumferential zone said annular groove, and said sealing mass completely filling said annular groove, sealing the juncture between said socket and member and connecting the latter to the former.
  • said socket and member being of metallic material, and said sealing mass being solder.
  • said socket having an open rear end portion; an electrically insulating member closing said open end portion; and bonding means pressure-tightly bonding said insulating member to said open end portion for preventing entry of atmospheric matter into the latter.
  • a headlight as defined in claim 7; further comprising terminals provided on said insulating member exteriorly of said socket, and a filament located in said bulb and having connecting portions pressure-tightly soldered to the respective terminals.
  • said insulating member having an evacuating aperture for evacuating the interior of said bulb and socket; and sealing means pressure-tightly sealing said aperture subsequent to evacuation for preventing the entry of said deleterious matter.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
US00075503A 1969-10-15 1970-09-25 Headlight construction Expired - Lifetime US3732415A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691951978 DE1951978B2 (de) 1969-10-15 1969-10-15 Scheinwerfer fuer kraftfahrzeuge

Publications (1)

Publication Number Publication Date
US3732415A true US3732415A (en) 1973-05-08

Family

ID=5748283

Family Applications (1)

Application Number Title Priority Date Filing Date
US00075503A Expired - Lifetime US3732415A (en) 1969-10-15 1970-09-25 Headlight construction

Country Status (10)

Country Link
US (1) US3732415A (enrdf_load_stackoverflow)
JP (1) JPS4917716B1 (enrdf_load_stackoverflow)
AT (1) AT304703B (enrdf_load_stackoverflow)
BE (1) BE757515A (enrdf_load_stackoverflow)
DE (1) DE1951978B2 (enrdf_load_stackoverflow)
ES (1) ES162374Y (enrdf_load_stackoverflow)
FR (1) FR2065400A5 (enrdf_load_stackoverflow)
GB (1) GB1266994A (enrdf_load_stackoverflow)
NL (1) NL7015062A (enrdf_load_stackoverflow)
SE (1) SE380079B (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987326A (en) * 1973-05-10 1976-10-19 Robert Bosch G.M.B.H. Sealed-beam headlight
US4009966A (en) * 1975-09-24 1977-03-01 General Motors Corporation Headlamp focusing method
US4241391A (en) * 1978-02-27 1980-12-23 Westinghouse Electric Corp. Inner lamp-mount assembly for sealed-beam headlamp and similar lighting apparatus
US4322784A (en) * 1979-10-16 1982-03-30 General Electric Company Vehicle headlamp having an integrally molded trim reference plane
US4336577A (en) * 1979-07-30 1982-06-22 General Electric Company Mounting pads for plastic par lamp
US4336578A (en) * 1979-07-30 1982-06-22 General Electric Company Plastic par lamp construction with reinforced recepticle area
US4339790A (en) * 1979-07-30 1982-07-13 General Electric Company Sealed prefocused mount for plastic par lamp
US4344120A (en) * 1979-07-30 1982-08-10 General Electric Company Plastic PAR lamp construction with tapered reinforcement
US4500946A (en) * 1982-01-13 1985-02-19 Ford Motor Company Replaceable lamp assembly for a sealable reflector housing
US4544998A (en) * 1982-09-29 1985-10-01 General Electric Company Sealed lamp
US4564891A (en) * 1984-06-01 1986-01-14 Robert Bosch Gmbh Vehicle headlight
US20150307744A1 (en) * 2014-04-25 2015-10-29 Hyundai Mobis Co., Ltd. Primer resin composition for vehicle reflector
US20160061433A1 (en) * 2014-09-02 2016-03-03 Huan-Chiu Chou Internal reflective light fixture

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2249630C2 (de) * 1972-07-05 1984-04-12 Robert Bosch Gmbh, 7000 Stuttgart Druckdichter Scheinwerfer für Kraftfahrzeuge
DE2232905C2 (de) * 1972-07-05 1982-09-09 Robert Bosch Gmbh, 7000 Stuttgart Druckdichter Scheinwerfer für Kraftfahrzeuge
FR2982214B1 (fr) * 2011-11-04 2017-02-24 Valeo Vision Belgique Support de lampe pour module ou dispositif d'eclairage et/ou de signalisation pour vehicule, module, boitier et procede correspondants

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US586055A (en) * 1897-07-06 Manufacttiee of incandescent lamps
US1640867A (en) * 1922-07-05 1927-08-30 Workman Harold Electric incandescent lamp
US2017714A (en) * 1933-03-30 1935-10-15 Gen Electric Electric lamp mounting and current supply connection
US2137424A (en) * 1936-10-20 1938-11-22 Rca Corp Electron tube
US2175361A (en) * 1936-10-29 1939-10-10 Gen Electric Lamp unit
US2225816A (en) * 1939-02-06 1940-12-24 Hall C M Lamp Co Lamp
US2259451A (en) * 1940-09-06 1941-10-21 Slayter Electronic Corp Method and apparatus for electric discharge
US3397307A (en) * 1964-03-23 1968-08-13 Cibie Pierre Headlamp units

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US586055A (en) * 1897-07-06 Manufacttiee of incandescent lamps
US1640867A (en) * 1922-07-05 1927-08-30 Workman Harold Electric incandescent lamp
US2017714A (en) * 1933-03-30 1935-10-15 Gen Electric Electric lamp mounting and current supply connection
US2137424A (en) * 1936-10-20 1938-11-22 Rca Corp Electron tube
US2175361A (en) * 1936-10-29 1939-10-10 Gen Electric Lamp unit
US2225816A (en) * 1939-02-06 1940-12-24 Hall C M Lamp Co Lamp
US2259451A (en) * 1940-09-06 1941-10-21 Slayter Electronic Corp Method and apparatus for electric discharge
US3397307A (en) * 1964-03-23 1968-08-13 Cibie Pierre Headlamp units

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987326A (en) * 1973-05-10 1976-10-19 Robert Bosch G.M.B.H. Sealed-beam headlight
US4009966A (en) * 1975-09-24 1977-03-01 General Motors Corporation Headlamp focusing method
US4241391A (en) * 1978-02-27 1980-12-23 Westinghouse Electric Corp. Inner lamp-mount assembly for sealed-beam headlamp and similar lighting apparatus
US4344120A (en) * 1979-07-30 1982-08-10 General Electric Company Plastic PAR lamp construction with tapered reinforcement
US4336577A (en) * 1979-07-30 1982-06-22 General Electric Company Mounting pads for plastic par lamp
US4336578A (en) * 1979-07-30 1982-06-22 General Electric Company Plastic par lamp construction with reinforced recepticle area
US4339790A (en) * 1979-07-30 1982-07-13 General Electric Company Sealed prefocused mount for plastic par lamp
US4322784A (en) * 1979-10-16 1982-03-30 General Electric Company Vehicle headlamp having an integrally molded trim reference plane
US4500946A (en) * 1982-01-13 1985-02-19 Ford Motor Company Replaceable lamp assembly for a sealable reflector housing
US4544998A (en) * 1982-09-29 1985-10-01 General Electric Company Sealed lamp
US4564891A (en) * 1984-06-01 1986-01-14 Robert Bosch Gmbh Vehicle headlight
US20150307744A1 (en) * 2014-04-25 2015-10-29 Hyundai Mobis Co., Ltd. Primer resin composition for vehicle reflector
US20160061433A1 (en) * 2014-09-02 2016-03-03 Huan-Chiu Chou Internal reflective light fixture
US9605841B2 (en) * 2014-09-02 2017-03-28 Huan-Chiu Chou Internal reflective light fixture

Also Published As

Publication number Publication date
DE1951978B2 (de) 1976-12-02
ES162374Y (es) 1971-07-01
ES162374U (es) 1971-01-16
FR2065400A5 (enrdf_load_stackoverflow) 1971-07-23
SE380079B (enrdf_load_stackoverflow) 1975-10-27
JPS4917716B1 (enrdf_load_stackoverflow) 1974-05-02
AT304703B (de) 1973-01-25
NL7015062A (enrdf_load_stackoverflow) 1971-04-19
DE1951978A1 (de) 1971-04-22
BE757515A (fr) 1971-03-16
GB1266994A (enrdf_load_stackoverflow) 1972-03-15

Similar Documents

Publication Publication Date Title
US3732415A (en) Headlight construction
US3784807A (en) Electric lamp
US4390931A (en) Lamp assembly
US3598989A (en) Automotive headlight
US4506315A (en) Vehicle headlamp
KR930008687Y1 (ko) 차량 헤드라이트
US5195815A (en) Antiglare bulb shade for a vehicle headlamp
US4563730A (en) Vehicle head lamp with synthetic resin reflector and ring-shaped heat shielding member
US3818215A (en) Sealed-beam headlight
US3917939A (en) Sealed-beam headlight employing a halogen lamp
JPH0482101A (ja) 車両用放電灯ヘッドランプ
US2317035A (en) Electric lamp
JP3572080B2 (ja) レフレクタランプ
US4213170A (en) Reflector lamp with lens having light-modifying coating
US3593017A (en) Airtight vehicle headlight having one-way valve
US4321658A (en) Headlamps for vehicles, and light units for such headlamps
US3566125A (en) Radiation excited light source
US3987326A (en) Sealed-beam headlight
ES460897A1 (es) Conjunto de faro.
US3397307A (en) Headlamp units
JP2006059810A (ja) ランプソケットのためのアウトガスシールド
EP0071583A1 (en) Front direction indicator lamp for motor vehicles
US2800641A (en) Vehicle tail, stop, and turn signal lamp
US2632842A (en) Sealed headlight having auxiliary reflector
US2089049A (en) Explosionproof lighting fixture