CA1111811A - Lamp/reflector unit - Google Patents
Lamp/reflector unitInfo
- Publication number
- CA1111811A CA1111811A CA333,476A CA333476A CA1111811A CA 1111811 A CA1111811 A CA 1111811A CA 333476 A CA333476 A CA 333476A CA 1111811 A CA1111811 A CA 1111811A
- Authority
- CA
- Canada
- Prior art keywords
- metal support
- support plate
- light bulb
- reflector
- pinch seal
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
- H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
Landscapes
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
ABSTRACT
The light bulb (1) of a lamp/reflector unit (1, 21, 26) can be mounted in a very simple and rapid manner in a reflector member (21) so as to be accurately aligned therewith in that a metal support plate (9) is placed on the pinch seal (3) of the light bulb (1) and is secured in a tubular metal support member (15) in an aligned manner by soldering or welding, the said metal support member being supported by a metal support pin (19).
The light bulb (1) of a lamp/reflector unit (1, 21, 26) can be mounted in a very simple and rapid manner in a reflector member (21) so as to be accurately aligned therewith in that a metal support plate (9) is placed on the pinch seal (3) of the light bulb (1) and is secured in a tubular metal support member (15) in an aligned manner by soldering or welding, the said metal support member being supported by a metal support pin (19).
Description
111~811 The invention relates to a lamp/reflector unit having a concave reflector member and a lens member attached thereto, a light bulb being supported in spaced relation to the reflecting surface of said reflector mem-ber, said reflector member having near its apex mutuallyelectrically insulated contact members, said light bulb having a pinch at one end thereof from which current con-ductors emanate which are in electrical contact with a filament disposed within said light bulb, said pinch seal extending through and being secured to a metal support plate which is borne by a metal support pin attached to one of said contact members of said reflector member, said current conductors each being connected to a respective one of said contact members.
Such a lamp/reflector unit is known from German Offenlegungsschrift 2400315 by Patent Treuhand Gesellschaft and which was published on July 17, 1975. The lamp/
reflector unit is destine for use as a headlight for vehicles, notably motorcars.
The known lamp/reflector unit has a light bulb in which two filaments are accommodated; one, which is partly surrounded by a metal screen, for the low, or dipped beam and one for the high or main beam. Similarly, however, light bulbs having only one filament may alternatively be used. In both cases, however, the light bulb should be mounted with the filament or filaments accurately aligned " . , ^, .c with respect to the reflecting surface of the reflector member in order to produce the required beam(s), In the known unit the metal support plate has a number of reference points and the correct arrangement of the ~ilaments relative to the reflecting surface of the reflector member has been obtained by securing the light bulb in the metal support plate so as to be aligned rela-tive to said reference points. After a nurnber of metal support pins which are connected to the metal support plate are secured to the contact members of the reflector member, the light bulb has the correct position relative to the reflecting surface of the reflector rnember.
In the known unit the light bulb is secured in the metal support plate by means of cement. The operation of securing is carried out in the known unit in a mechani-cal-optical aligning apparatus in which the light bulb is aligned relative to the reference points of the metal support plate and is then kept aliglled until the cement has cured su~`iciently to prevent a change of the pvsition of the light bulb in the metal support plate. The actual alignment of the light bulb requires approximately 0.1 sec.
whereas the curing of the cement requires many tens of seconds. Therefore~ during the rna]luf`acture of the }cnown unit, the aligning apparatus i5 kep-t occupied by a unit much longer than is necessary f'or the actuaL alignment.
l't is an object of' the invention to provide a construction for a lamp/reflector unit which enables the light bulb to be aligned and secured, in a very rapid manner.
In a lamplreflector unit of the kind mentioned in the opening paragraph this o~ject is achieved in that said me~al support plate is disposed within and attached to a tubular rnetal support mernber by a joint selectcd f`rom the group consisting of welded joints and bra~ed joints~ which member is attached to said metal support pin.
The advantage of the const,ruction of t~le uni,ts according to the invention is that the light bulb can, be mounted in the meta- support plate outside the ali,gn:ing -` 1111811 apparatus. ~urther, the light bulb need not occupy an accurately de~ined position with respect to the metal support plate. The metal support pin can also be secured to the tubular metal support member outside the aligning apparatus. In the aligning apparatus the light bulb with its support plate can very rapidly and simply be connected to the tubular metal support member so as to be aligned.
If a solder is used to connect the tubular metal support rne)nber to the metal support plate~ the aligning apparatus is occupied by one lamp only for appro-ximately 10 seconds. However, when a welded joint is made, the process of aligning and connecting is reduced to about one second.
The assembly obtained in the aligning apparatus is then provided in a reflector member and fixed therein with the metal support pin secured to a contact member, for example by means of solder.
The construction may be used in halogen filament lamps in which a light bulb of quartz glass or hard glass is filled with an inert gas to which a halogen or a halogen compound, for example hydrobromide or a brominated hydrocarbon, fo~ example methylene bromide~ has been added Cement may be used to connect the metal support plate to the pinch seal of the light bulb. However, the dis~dvantages o~ cement are that it can crumble away and that at higher temperatures it may give off vapours which produce stains on the reflecting surface of the reflector member. The connection of the metal support plate to the pinch seal o~ the light bulb by means of cement leads to an additional disadvantage in that cement is a poor heat conductor and hence dissipates the heat of the light bulb poorly.
It is therefore recommendable to provide around the ~nch seal o~ the ligrht bulb a met~l sleeve to which the metal support plate has been secured by welding or soldering. A very simple method of connecting :;s one in which the metal support plate is provided with ~111811 resilient lugs stamped out of said plate and in which said lugs frictionally engage said pinch seal. Such a metal support plate is described in our Canadian Patent 1,061,398 which issued on August 28, 1979.
The invention also relates to an assembly of a light bulb, a metal support plate, a tubular metal support member and a support pin for use in a lamp/reflector unit.
Embodiments of the lamp/reflector unit according to the invention will now be described with reference to the drawing, in which Fig. 1 is an elevation, partly broken away, of a lamp/reflector unit.
Fig. 2 is a sectional view taken on the line II-II
of Fig. 1.
Fig. 3 is an elevation, partly in cross section, of a reflector member, a light bulb having a metal support plate, and a tubular metal support member having a metal support pin prior to assembly.
The halogen light bulb 1 shown in Fig. 1 has an envelope 2 consisting of quartz glass which has a pinch seal 3 which in cross-section is substantially rectangular and which envelope is filled with a halogen-containing inert gas. A lowbeam filament 4 and a high-beam filament 5 are arranged in the envelope 1. The filament 4 cooperates with a screening cap 6, 7 denotes current conductors which pass-through the pinch seal 3.
The light bulb 1 is connected with its pinch seal 3 in a round metal support plate 9 of resilient metal sheet.
The light bulb 1 with its metal support plate 9 is inserted in a tubular metal support member 15. Via a small cylindrical lip 17 of the metal support plate 9, this is connected in, for example, three points 1~ (seen in fig.
Such a lamp/reflector unit is known from German Offenlegungsschrift 2400315 by Patent Treuhand Gesellschaft and which was published on July 17, 1975. The lamp/
reflector unit is destine for use as a headlight for vehicles, notably motorcars.
The known lamp/reflector unit has a light bulb in which two filaments are accommodated; one, which is partly surrounded by a metal screen, for the low, or dipped beam and one for the high or main beam. Similarly, however, light bulbs having only one filament may alternatively be used. In both cases, however, the light bulb should be mounted with the filament or filaments accurately aligned " . , ^, .c with respect to the reflecting surface of the reflector member in order to produce the required beam(s), In the known unit the metal support plate has a number of reference points and the correct arrangement of the ~ilaments relative to the reflecting surface of the reflector member has been obtained by securing the light bulb in the metal support plate so as to be aligned rela-tive to said reference points. After a nurnber of metal support pins which are connected to the metal support plate are secured to the contact members of the reflector member, the light bulb has the correct position relative to the reflecting surface of the reflector rnember.
In the known unit the light bulb is secured in the metal support plate by means of cement. The operation of securing is carried out in the known unit in a mechani-cal-optical aligning apparatus in which the light bulb is aligned relative to the reference points of the metal support plate and is then kept aliglled until the cement has cured su~`iciently to prevent a change of the pvsition of the light bulb in the metal support plate. The actual alignment of the light bulb requires approximately 0.1 sec.
whereas the curing of the cement requires many tens of seconds. Therefore~ during the rna]luf`acture of the }cnown unit, the aligning apparatus i5 kep-t occupied by a unit much longer than is necessary f'or the actuaL alignment.
l't is an object of' the invention to provide a construction for a lamp/reflector unit which enables the light bulb to be aligned and secured, in a very rapid manner.
In a lamplreflector unit of the kind mentioned in the opening paragraph this o~ject is achieved in that said me~al support plate is disposed within and attached to a tubular rnetal support mernber by a joint selectcd f`rom the group consisting of welded joints and bra~ed joints~ which member is attached to said metal support pin.
The advantage of the const,ruction of t~le uni,ts according to the invention is that the light bulb can, be mounted in the meta- support plate outside the ali,gn:ing -` 1111811 apparatus. ~urther, the light bulb need not occupy an accurately de~ined position with respect to the metal support plate. The metal support pin can also be secured to the tubular metal support member outside the aligning apparatus. In the aligning apparatus the light bulb with its support plate can very rapidly and simply be connected to the tubular metal support member so as to be aligned.
If a solder is used to connect the tubular metal support rne)nber to the metal support plate~ the aligning apparatus is occupied by one lamp only for appro-ximately 10 seconds. However, when a welded joint is made, the process of aligning and connecting is reduced to about one second.
The assembly obtained in the aligning apparatus is then provided in a reflector member and fixed therein with the metal support pin secured to a contact member, for example by means of solder.
The construction may be used in halogen filament lamps in which a light bulb of quartz glass or hard glass is filled with an inert gas to which a halogen or a halogen compound, for example hydrobromide or a brominated hydrocarbon, fo~ example methylene bromide~ has been added Cement may be used to connect the metal support plate to the pinch seal of the light bulb. However, the dis~dvantages o~ cement are that it can crumble away and that at higher temperatures it may give off vapours which produce stains on the reflecting surface of the reflector member. The connection of the metal support plate to the pinch seal o~ the light bulb by means of cement leads to an additional disadvantage in that cement is a poor heat conductor and hence dissipates the heat of the light bulb poorly.
It is therefore recommendable to provide around the ~nch seal o~ the ligrht bulb a met~l sleeve to which the metal support plate has been secured by welding or soldering. A very simple method of connecting :;s one in which the metal support plate is provided with ~111811 resilient lugs stamped out of said plate and in which said lugs frictionally engage said pinch seal. Such a metal support plate is described in our Canadian Patent 1,061,398 which issued on August 28, 1979.
The invention also relates to an assembly of a light bulb, a metal support plate, a tubular metal support member and a support pin for use in a lamp/reflector unit.
Embodiments of the lamp/reflector unit according to the invention will now be described with reference to the drawing, in which Fig. 1 is an elevation, partly broken away, of a lamp/reflector unit.
Fig. 2 is a sectional view taken on the line II-II
of Fig. 1.
Fig. 3 is an elevation, partly in cross section, of a reflector member, a light bulb having a metal support plate, and a tubular metal support member having a metal support pin prior to assembly.
The halogen light bulb 1 shown in Fig. 1 has an envelope 2 consisting of quartz glass which has a pinch seal 3 which in cross-section is substantially rectangular and which envelope is filled with a halogen-containing inert gas. A lowbeam filament 4 and a high-beam filament 5 are arranged in the envelope 1. The filament 4 cooperates with a screening cap 6, 7 denotes current conductors which pass-through the pinch seal 3.
The light bulb 1 is connected with its pinch seal 3 in a round metal support plate 9 of resilient metal sheet.
The light bulb 1 with its metal support plate 9 is inserted in a tubular metal support member 15. Via a small cylindrical lip 17 of the metal support plate 9, this is connected in, for example, three points 1~ (seen in fig.
2) to the tubular metal support member 15 by spot welding.
Metal support pin 19 to which one of the current conduc-tors 7 is attached, for example by welding is connectedto said support member 15, for example by welding.
, , ~, ~
The support pin 19 is, together with the remaining current conductors 7, provided in a respective one of contact members 20 of a concave, preferably parabolic, reflector member 21 and is soldered there. Reflector member 21 has a reflecti~g surface 25 and a lens member 26.
, The tubular metal support member 15 has two incisions 22 serving as referenccs for the position of , the light bulb 1. A light bulb having a correct position with respect to said references, obtains a correct position with respect to the reflecting member 21, when it is pro-vided therein. This will become apparent hereinafter.
In Fig. 2 the metal support plate 9 has two concave curved lugs 10 which are stamped out of the metal support plate 9 and bound a rectangular recess 1 on the narrow sides ~f which small triangular prestressed lugs 12 are formed by angular incisions and which are also stamped out of the metal support plate 9.
' The metal support plate 9 is slid on the pinch seal 3 of the light bulb 1, the two lugs 10 ~olding the pinch seal 3 on its major sides and the small tr,iangu~ar-lugs 12 holding the pinch scal 3 on its narrow ~sides. The ,, metal support plate 9 hence is force-locked to the pinch seal 3 only by the two pairs of resilient lugs 10 and 12.
For a better holding of the metal support plate 9 on the pinch seal 3, the latter has stepped projections 13 on its major sides behind which the lugs 10 snap into engagement.
It will now be described with reference to Fig, 3 how the light bulb 1 is provided and aligned with respect to the reflector member 21. ~irst the tubular metal support ~ember 15 with its metal support pin 19 is clamped i~ a given position with respect to the reflector member 21 at i,ts references 22. The light bulb 1 with its mounted metal support plate 9 is then inserted into the aperture 16 of the tubular metal support member 15. B~
mo-ving a device which holds the l,i~ht bulb 1, the filament 4 is then moved to within the tolerance field destined for it so that afterwards the foc1ls of the ref`lector rnem-ber 21 becomes :locatcd between the f'ilaments 4 and 5 on 1~1811 the centre axis of the filament 1. The metal support plate 9 is then fixéfl.-~t~ the tubular metal support member by soldering.
.The assembly thus obtained and the reflector member ?1 are then assembled, the free ends of the metal support pin 19 as well as of the free current conductors 7 sliding into a respective one of the reflector contact -members 20 and being secured thereto by means of hard solder 23.
A transparent lens member is then sealed in a gas-tight manner on the reflector member 21 and the inte-rior of the resulting outer envelope is filled with an inert gas, for example nitrogen.
It is to be noted that the metal support pin does not have to be deformed in order to be able to mount the light bulb in an aligned manner. As a result of this one is.entirely free to choose the shape and dimensions of the metal support pin i~ agreemen.t with re~uirements to be imposed upon the rigidity of the construction.
Metal support pin 19 to which one of the current conduc-tors 7 is attached, for example by welding is connectedto said support member 15, for example by welding.
, , ~, ~
The support pin 19 is, together with the remaining current conductors 7, provided in a respective one of contact members 20 of a concave, preferably parabolic, reflector member 21 and is soldered there. Reflector member 21 has a reflecti~g surface 25 and a lens member 26.
, The tubular metal support member 15 has two incisions 22 serving as referenccs for the position of , the light bulb 1. A light bulb having a correct position with respect to said references, obtains a correct position with respect to the reflecting member 21, when it is pro-vided therein. This will become apparent hereinafter.
In Fig. 2 the metal support plate 9 has two concave curved lugs 10 which are stamped out of the metal support plate 9 and bound a rectangular recess 1 on the narrow sides ~f which small triangular prestressed lugs 12 are formed by angular incisions and which are also stamped out of the metal support plate 9.
' The metal support plate 9 is slid on the pinch seal 3 of the light bulb 1, the two lugs 10 ~olding the pinch seal 3 on its major sides and the small tr,iangu~ar-lugs 12 holding the pinch scal 3 on its narrow ~sides. The ,, metal support plate 9 hence is force-locked to the pinch seal 3 only by the two pairs of resilient lugs 10 and 12.
For a better holding of the metal support plate 9 on the pinch seal 3, the latter has stepped projections 13 on its major sides behind which the lugs 10 snap into engagement.
It will now be described with reference to Fig, 3 how the light bulb 1 is provided and aligned with respect to the reflector member 21. ~irst the tubular metal support ~ember 15 with its metal support pin 19 is clamped i~ a given position with respect to the reflector member 21 at i,ts references 22. The light bulb 1 with its mounted metal support plate 9 is then inserted into the aperture 16 of the tubular metal support member 15. B~
mo-ving a device which holds the l,i~ht bulb 1, the filament 4 is then moved to within the tolerance field destined for it so that afterwards the foc1ls of the ref`lector rnem-ber 21 becomes :locatcd between the f'ilaments 4 and 5 on 1~1811 the centre axis of the filament 1. The metal support plate 9 is then fixéfl.-~t~ the tubular metal support member by soldering.
.The assembly thus obtained and the reflector member ?1 are then assembled, the free ends of the metal support pin 19 as well as of the free current conductors 7 sliding into a respective one of the reflector contact -members 20 and being secured thereto by means of hard solder 23.
A transparent lens member is then sealed in a gas-tight manner on the reflector member 21 and the inte-rior of the resulting outer envelope is filled with an inert gas, for example nitrogen.
It is to be noted that the metal support pin does not have to be deformed in order to be able to mount the light bulb in an aligned manner. As a result of this one is.entirely free to choose the shape and dimensions of the metal support pin i~ agreemen.t with re~uirements to be imposed upon the rigidity of the construction.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS
1. A lamp/reflector unit having a concave reflector member and a lens member attached thereto, a light bulb being supported in spaced relation to the reflecting sur-face of said reflector member, said reflector member hav-ing near its apex mutually electrically insulated contact members, said light bulb having a pinch seal at one end thereof from which current conductors emanate which are in electrical contact with a filament disposed within said light bulb, said pinch seal extending through and being secured to a metal support plate which is borne by a metal support pin attached to one of said contact members of said reflector member, said current conductors each being connected to a respective one of said contact members, characterized in that said metal support plate is disposed within and is attached to a tubular metal support member by a joint selected from the group consisting of welded joints and braced joints, which member is attached to said metal support pin.
2. A lamp/reflector unit as claimed in Claim 1, characterized in that the metal support plate is welded to the tubular metal support member.
3. A lamp/reflector unit as claimed in Claim 1 or 2, characterized in that the metal support plate is secured to the pinch seal of the light bulb by means of resilient lugs stamped out of said metal support plate and frictionally engaging said pinch seal.
4. An assembly comprising a light bulb, a metal support plate and a metal support pin for use in a lamp/
reflector unit having a concave reflector member and a lens member attached thereto, a light bulb being supported in space relation to the reflecting surface of the said reflector member, said reflector member having near its apex mutually electrically insulated contact members, said light bulb having a pinch seal at one end thereof from which current conductors emanate which are in electrical contact with a filament disposed within said light bulb, said pinch seal extending through and being secured to a metal support plate which is borne by a metal support pin attached to one of said contact members of said reflector member, said current conductors each being connected to a respective one of said contact members, characterized in that said metal support plate is disposed within and at-tached to a tubular metal support member by a joint se-lected from the group consisting of welded joints and braced joints, which member is attached to said metal support pin.
reflector unit having a concave reflector member and a lens member attached thereto, a light bulb being supported in space relation to the reflecting surface of the said reflector member, said reflector member having near its apex mutually electrically insulated contact members, said light bulb having a pinch seal at one end thereof from which current conductors emanate which are in electrical contact with a filament disposed within said light bulb, said pinch seal extending through and being secured to a metal support plate which is borne by a metal support pin attached to one of said contact members of said reflector member, said current conductors each being connected to a respective one of said contact members, characterized in that said metal support plate is disposed within and at-tached to a tubular metal support member by a joint se-lected from the group consisting of welded joints and braced joints, which member is attached to said metal support pin.
5. An assembly as claimed in Claim 4, character-ized in that the metal support plate is welded to the tubular metal support member.
6. An assembly as claimed in Claim 4 or 5, cha-racterized in that the metal support plate is secured to the pinch seal of the light bulb by means of resilient lugs stamped out of said metal support plate and friction-ally engaging said pinch seal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782835560 DE2835560A1 (en) | 1978-08-14 | 1978-08-14 | Sealed motor vehicle headlight unit - has halogen lamp held on support plate which is located in reflector using circumferential reference notches |
| DEP2835560.4 | 1978-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1111811A true CA1111811A (en) | 1981-11-03 |
Family
ID=6046995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA333,476A Expired CA1111811A (en) | 1978-08-14 | 1979-08-09 | Lamp/reflector unit |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5528294A (en) |
| CA (1) | CA1111811A (en) |
| DE (1) | DE2835560A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3101640A1 (en) * | 1981-01-20 | 1982-08-26 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München | SEALED BEAM HEADLIGHT |
| DE8121528U1 (en) * | 1981-07-22 | 1982-11-18 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München | TWO-THREAD HALOGEN BULB FOR MOTOR VEHICLE HEADLIGHTS |
| JPS6421962U (en) * | 1987-07-29 | 1989-02-03 | ||
| US5115381A (en) * | 1989-12-21 | 1992-05-19 | U.S. Philips Corporation | Motor vehicle headlamp and reflector body for same |
-
1978
- 1978-08-14 DE DE19782835560 patent/DE2835560A1/en not_active Withdrawn
-
1979
- 1979-08-09 CA CA333,476A patent/CA1111811A/en not_active Expired
- 1979-08-11 JP JP10271079A patent/JPS5528294A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2835560A1 (en) | 1980-02-28 |
| JPS5528294A (en) | 1980-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |