US1834542A - Dimming device for headlights for automobiles and the like - Google Patents
Dimming device for headlights for automobiles and the like Download PDFInfo
- Publication number
- US1834542A US1834542A US445024A US44502430A US1834542A US 1834542 A US1834542 A US 1834542A US 445024 A US445024 A US 445024A US 44502430 A US44502430 A US 44502430A US 1834542 A US1834542 A US 1834542A
- Authority
- US
- United States
- Prior art keywords
- shade
- light
- section
- automobiles
- headlights
- 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
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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
- F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
- F21S41/692—Shields, i.e. screens not creating an image meant to be projected
-
- 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
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
-
- 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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
Definitions
- the present invention relates to a dimming device for headlights for automobiles and the like which consists of an extensible and contractible shade comprising a number of shade sections which are pivoted on a common axis and are adapted in a certain position to shut off certain light rays from the lamp bulb.
- Devices of this type as hitherto proposed have not provided a satisfactory dimming of the light, since in those cases when the light was sufficiently shut off for not blinding an approaching driver the roadway was too badly lighted, and in such cases when the roadway was sufficiently illuminated the light was reflected so much upwards that it shone into the eyes of an approaching driver.
- Fig. 1 shows a vertical section through a headlight pro vided with a dimming device according to the present invention, said device being shown in the dimming position.
- Fig. 2 shows the dimmer in position for full light.
- Pig. 3 shows diagrammatically the manner in which the beam of light emitted through the dimmer when in the dimming position, is reflected.
- the reflector 1 is provided in the usual manner with a lamp socket 2 carrying lamp 3. Secure-d to the socket 2 is a shield 4 which has the shape of a spherical segment which is concentric with the lamp bulb 3. Pivotally supported in the shield 4 on pivots which are located in alignment with the horizontal axis through the center of the lamp bulb 8, is an extensible and contractible shade consisting W of three shade sections 5, 6 and 7 located one inside the other, and each of which has the shape of a spherical segment concentric with the lamp bulb.
- the movement of the shade sections 5 and 6 is limited by projections 8 on the parts 4 and 5,and by projections 9 on the parts 5 and 6, in such manner that when the shade is extended, i.
- the 69 shade sections 5 and6 form a spherical segment which covers the-lower and front sides of the lamp bulb 3,-as shown in Fig. 1.
- the innermost shade section 7 is provided with an arm 10 which cooperates with an abutment t? 11 on the shade section 6.
- a toothed pinion 12 Secured totheshade section 7 concentric with its axis of rotation is a toothed pinion 12 which meshes with a toothed segment 13 attached to the end of a bell crank lever 15, ⁇ 19 which is pivoted on the pin 14 andthe other end of which is pivotally connected to a magnet core 16 in a solenoid 17 which, when energized by electric current, moves the arm 15 in the counter-clockwise direction in Fig. 1 against the influence of a spring 18.
- the light is to be dimmed electric current is supplied to the solenoid 17 so that the core 16 is attracted and the arm 15 is moved in the counter-clockwise direction in 9 Fig. 1.
- the toothed segment 13 thus moves to the right in Fig. 1 and rotates the pinion 12 and thus also the shade section 7 in the counter-clockwise direction in Fig. 1.
- the arm 10 on the shade section 7 engages the 5 abutment 11 on the shade section 6, the latter is entrained in the rotation, and when the projections 9 engage one another the shade section 5 is also entrained until the projections 8 engage one another.
- the arm 10 is so 9 positioned that an opening is formed between the shade section 7 and the shade section 6 for a beam of light from the bulb 3 which falls on such portion of the reflector 1 that said beam of light is only reflected obliquely 6Z downwards, as shown diagrammatically in Fig. 3.
- the inner surfaces of theshade sections may be polished so that they reflect light through said opening. In the case of a motor vehicle the portion of the reflector 1 on 1.
- the shade section 7 prevents light rays from the bulb 3 from reaching the central portion of the reflector which portion otherwise reflects the beam of light in such direction that it would shine into the eyes of an approaching driver and blind him.
- the solenoid 17 is deenergized, the arm15 is moved by the spring 18 in the clockwise direction in Fig. 1, so that the pinion 12 and thus also the shade section 7 are rotated in the clockwise direction,
- the edge of the shade section 7 engages the abutment 11 on the shade section 6, said section is entrained in the rotation, and when a stop 19 on the shade'section 6 engages the edge of the shade section 5, said section 15 also entrained. and all sections are thus moved together in the position illustrated in Fig. 2 for full light.
- a headlight for automobiles and the like comprising a reflector and alightsource, in combination with an extensible and contractible shade consisting of a plurality of shade sections hinged to each other and rotatable on a common aXis around the light source, said shade being adapted in its extended posltlon to substantially enclose said light source leaving only such opening that light rays emitted from said light source through said opening only fall upon such upper and forward portion of said reflector as will reflect the light rays obliquely downwards, and at least one of said shade sections being adapted in such position'of'said shade to occupy such position between said light source andsaid reflector as to shut off such light rays as are projected from said light source towards the central portion of said reflector.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Description
Dec. 1, 1931.
K. a. KARLEBO DIMMING DEVICE FOR HEADLIGHTS FOR AUTOMOBILES AND THE LIKE Filed April 17, 1930 Fatented Dec. 1, 1931 NITED STATES KARL BIRGER KARL-E130, OF STOCKHOLM, SWEDEN DIMMING- DEVICE FOR HEADLIGHTS FOR AUTOMOBILES AND THE LIKE Application filed April 17, 1930, Serial N0.-445,024, and in Sweden April 23, 1929.
The present invention relates to a dimming device for headlights for automobiles and the like which consists of an extensible and contractible shade comprising a number of shade sections which are pivoted on a common axis and are adapted in a certain position to shut off certain light rays from the lamp bulb. Devices of this type as hitherto proposed have not provided a satisfactory dimming of the light, since in those cases when the light was sufficiently shut off for not blinding an approaching driver the roadway was too badly lighted, and in such cases when the roadway was sufficiently illuminated the light was reflected so much upwards that it shone into the eyes of an approaching driver.
These inconveniences are avoided according to the present invention which broadly consists in that in the extended position of the shade one or more of the shade sections occupy such positions between the lamp bulb and the reflector that they shut off those light rays which are projected from the bulb rearwai'ds against the central portion of the re flector, only such opening being left between the shade sections that light rays projecting n the bulb through said opening reach y the upper portion of the reflector which portion reflects the rays obliquely downcards.
The accompanying drawings illustrate an embodiment of the invention. Fig. 1 shows a vertical section through a headlight pro vided with a dimming device according to the present invention, said device being shown in the dimming position. Fig. 2 shows the dimmer in position for full light. Pig. 3 shows diagrammatically the manner in which the beam of light emitted through the dimmer when in the dimming position, is reflected.
The reflector 1 is provided in the usual manner with a lamp socket 2 carrying lamp 3. Secure-d to the socket 2 is a shield 4 which has the shape of a spherical segment which is concentric with the lamp bulb 3. Pivotally supported in the shield 4 on pivots which are located in alignment with the horizontal axis through the center of the lamp bulb 8, is an extensible and contractible shade consisting W of three shade sections 5, 6 and 7 located one inside the other, and each of which has the shape of a spherical segment concentric with the lamp bulb. The movement of the shade sections 5 and 6 is limited by projections 8 on the parts 4 and 5,and by projections 9 on the parts 5 and 6, in such manner that when the shade is extended, i. e.- when the sectionsare swung'out from each other, the 69 shade sections 5 and6 form a spherical segment which covers the-lower and front sides of the lamp bulb 3,-as shown in Fig. 1. The innermost shade section 7 is provided with an arm 10 which cooperates with an abutment t? 11 on the shade section 6.
Secured totheshade section 7 concentric with its axis of rotation is a toothed pinion 12 which meshes with a toothed segment 13 attached to the end of a bell crank lever 15, {19 which is pivoted on the pin 14 andthe other end of which is pivotally connected to a magnet core 16 in a solenoid 17 which, when energized by electric current, moves the arm 15 in the counter-clockwise direction in Fig. 1 against the influence of a spring 18.
hen the light is to be dimmed electric current is supplied to the solenoid 17 so that the core 16 is attracted and the arm 15 is moved in the counter-clockwise direction in 9 Fig. 1. The toothed segment 13 thus moves to the right in Fig. 1 and rotates the pinion 12 and thus also the shade section 7 in the counter-clockwise direction in Fig. 1. When the arm 10 on the shade section 7 engages the 5 abutment 11 on the shade section 6, the latter is entrained in the rotation, and when the projections 9 engage one another the shade section 5 is also entrained until the projections 8 engage one another. The arm 10 is so 9 positioned that an opening is formed between the shade section 7 and the shade section 6 for a beam of light from the bulb 3 which falls on such portion of the reflector 1 that said beam of light is only reflected obliquely 6Z downwards, as shown diagrammatically in Fig. 3. The inner surfaces of theshade sections may be polished so that they reflect light through said opening. In the case of a motor vehicle the portion of the reflector 1 on 1.
which the light falls, should be so large that the road surface becomes illuminated from 5 to about 35 feet in front of the headlight.
The shade section 7 prevents light rays from the bulb 3 from reaching the central portion of the reflector which portion otherwise reflects the beam of light in such direction that it would shine into the eyes of an approaching driver and blind him. lV hen the solenoid 17 is deenergized, the arm15 is moved by the spring 18 in the clockwise direction in Fig. 1, so that the pinion 12 and thus also the shade section 7 are rotated in the clockwise direction, When the edge of the shade section 7 engages the abutment 11 on the shade section 6, said section is entrained in the rotation, and when a stop 19 on the shade'section 6 engages the edge of the shade section 5, said section 15 also entrained. and all sections are thus moved together in the position illustrated in Fig. 2 for full light.
The embodiment described is merely selected as an example of the preferred manner in which the invention may be carried out, and it will be understood that various modifications may be made, for instance in respect of the shapes of the shade sections and the device for actuating the same, without departing from the principle of the invention.
A headlight for automobiles and the like comprising a reflector and alightsource, in combination with an extensible and contractible shade consisting of a plurality of shade sections hinged to each other and rotatable on a common aXis around the light source, said shade being adapted in its extended posltlon to substantially enclose said light source leaving only such opening that light rays emitted from said light source through said opening only fall upon such upper and forward portion of said reflector as will reflect the light rays obliquely downwards, and at least one of said shade sections being adapted in such position'of'said shade to occupy such position between said light source andsaid reflector as to shut off such light rays as are projected from said light source towards the central portion of said reflector.
KARL BIRGER KARLEBO.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1834542X | 1929-04-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1834542A true US1834542A (en) | 1931-12-01 |
Family
ID=20423747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US445024A Expired - Lifetime US1834542A (en) | 1929-04-23 | 1930-04-17 | Dimming device for headlights for automobiles and the like |
Country Status (1)
Country | Link |
---|---|
US (1) | US1834542A (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4443834A (en) * | 1981-04-07 | 1984-04-17 | Westalische Metall Industrie Kg Hueck & Co. | Interior lighting for vehicles with rotatable mask |
US5379196A (en) * | 1992-06-05 | 1995-01-03 | Koito Manufacturing Co., Ltd. | Projection headlamp for vehicles |
EP0989357A1 (en) * | 1998-09-25 | 2000-03-29 | Stanley Electric Co., Ltd. | Headlamp with beam distribution switch mechanism |
US6059435A (en) * | 1997-12-18 | 2000-05-09 | Robert Bosch Gmbh | Headlight of a vehicle for high beam light and low beam light |
US6099157A (en) * | 1997-09-05 | 2000-08-08 | Hella Kg Hueck & Co. | Vehicle headlight |
US6227691B1 (en) * | 1998-07-07 | 2001-05-08 | Robert Bosch Gmbh | Headlight arrangement for motor vehicle |
US6286985B1 (en) * | 1999-01-13 | 2001-09-11 | Koito Manufacturing Co., Ltd. | Vehicle headlamp |
US20030007364A1 (en) * | 2001-06-12 | 2003-01-09 | Ichikoh Industries, Ltd. | Headlamp |
US20040202004A1 (en) * | 2003-04-09 | 2004-10-14 | Guide Corporation, A Delaware Corporation | Bifunctional headlamp having a rotating shield with integral actuator |
US20040228139A1 (en) * | 2000-12-05 | 2004-11-18 | Stanley Electric Co., Ltd. | Vehicle light with movable reflector portion and shutter portion for selectively switching an illuminated area of light incident on a predetermined portion of the vehicle light during driving |
US20050047151A1 (en) * | 2003-08-29 | 2005-03-03 | Guide Corporation | Light assembly with bending light |
US20070153529A1 (en) * | 2005-12-30 | 2007-07-05 | Hon Hai Precision Industry Co., Ltd. | Light-reflecting and light-shielding apparatus of computer panel |
US20080025035A1 (en) * | 2006-07-31 | 2008-01-31 | Visteon Global Technologies, Inc. | Projector lamp having enhanced low to high beam contrast ratio |
US20080180966A1 (en) * | 2006-02-14 | 2008-07-31 | Valeo Vision | Headlight for motor vehicles |
US20100033984A1 (en) * | 2008-08-11 | 2010-02-11 | Koito Manufacturing Co., Ltd. | Automotive headlamp apparatus synthesizing light distribution patterns of right and left lamp units |
DE19950592B4 (en) * | 1998-10-21 | 2010-04-15 | Valeo Vision | Lighting or signaling device for automobiles with novel access means to a lamp |
US20160053959A1 (en) * | 2014-08-20 | 2016-02-25 | Hyundai Motor Company | Shielding apparatus for vehicle lamp |
-
1930
- 1930-04-17 US US445024A patent/US1834542A/en not_active Expired - Lifetime
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4443834A (en) * | 1981-04-07 | 1984-04-17 | Westalische Metall Industrie Kg Hueck & Co. | Interior lighting for vehicles with rotatable mask |
US5379196A (en) * | 1992-06-05 | 1995-01-03 | Koito Manufacturing Co., Ltd. | Projection headlamp for vehicles |
US6099157A (en) * | 1997-09-05 | 2000-08-08 | Hella Kg Hueck & Co. | Vehicle headlight |
US6059435A (en) * | 1997-12-18 | 2000-05-09 | Robert Bosch Gmbh | Headlight of a vehicle for high beam light and low beam light |
US6227691B1 (en) * | 1998-07-07 | 2001-05-08 | Robert Bosch Gmbh | Headlight arrangement for motor vehicle |
EP0989357A1 (en) * | 1998-09-25 | 2000-03-29 | Stanley Electric Co., Ltd. | Headlamp with beam distribution switch mechanism |
US6190029B1 (en) | 1998-09-25 | 2001-02-20 | Stanley Electric Co., Ltd. | Headlamp with beam distribution switch mechanism |
DE19950592B4 (en) * | 1998-10-21 | 2010-04-15 | Valeo Vision | Lighting or signaling device for automobiles with novel access means to a lamp |
US6286985B1 (en) * | 1999-01-13 | 2001-09-11 | Koito Manufacturing Co., Ltd. | Vehicle headlamp |
US20040228139A1 (en) * | 2000-12-05 | 2004-11-18 | Stanley Electric Co., Ltd. | Vehicle light with movable reflector portion and shutter portion for selectively switching an illuminated area of light incident on a predetermined portion of the vehicle light during driving |
EP1707869A3 (en) * | 2000-12-05 | 2006-10-11 | Stanley Electric Co., Ltd. | Vehicle headlight with a movable shutter portion for varying the light distribution pattern of the vehicle. |
US7008094B2 (en) * | 2000-12-05 | 2006-03-07 | Stanley Electric Co., Ltd. | Vehicle light with movable reflector portion and shutter portion for selectively switching an illuminated area of light incident on a predetermined portion of the vehicle light during driving |
EP1707869A2 (en) * | 2000-12-05 | 2006-10-04 | Stanley Electric Co., Ltd. | Vehicle headlight with a movable shutter portion for varying the light distribution pattern of the vehicle. |
US20030007364A1 (en) * | 2001-06-12 | 2003-01-09 | Ichikoh Industries, Ltd. | Headlamp |
US6799874B2 (en) * | 2001-06-12 | 2004-10-05 | Ichikoh Industries, Ltd. | Automobile headlamp having a main reflector and a movable sub-reflector |
US20040202004A1 (en) * | 2003-04-09 | 2004-10-14 | Guide Corporation, A Delaware Corporation | Bifunctional headlamp having a rotating shield with integral actuator |
US20050047151A1 (en) * | 2003-08-29 | 2005-03-03 | Guide Corporation | Light assembly with bending light |
US7018078B2 (en) | 2003-08-29 | 2006-03-28 | Guide Corporation | Light assembly with bending light |
US20070153529A1 (en) * | 2005-12-30 | 2007-07-05 | Hon Hai Precision Industry Co., Ltd. | Light-reflecting and light-shielding apparatus of computer panel |
US7530713B2 (en) * | 2005-12-30 | 2009-05-12 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Light-reflecting and light-shielding apparatus of computer panel |
US20080180966A1 (en) * | 2006-02-14 | 2008-07-31 | Valeo Vision | Headlight for motor vehicles |
US7568825B2 (en) * | 2006-02-14 | 2009-08-04 | Valeo Vision | Headlight for motor vehicles |
US20080025035A1 (en) * | 2006-07-31 | 2008-01-31 | Visteon Global Technologies, Inc. | Projector lamp having enhanced low to high beam contrast ratio |
US7775699B2 (en) | 2006-07-31 | 2010-08-17 | Visteon Global Technologies, Inc. | Projector lamp having enhanced low to high beam contrast ratio |
US20100033984A1 (en) * | 2008-08-11 | 2010-02-11 | Koito Manufacturing Co., Ltd. | Automotive headlamp apparatus synthesizing light distribution patterns of right and left lamp units |
US8182126B2 (en) * | 2008-08-11 | 2012-05-22 | Koito Manufacturing Co., Ltd. | Automotive headlamp apparatus synthesizing light distribution patterns of right and left lamp units |
US20160053959A1 (en) * | 2014-08-20 | 2016-02-25 | Hyundai Motor Company | Shielding apparatus for vehicle lamp |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1834542A (en) | Dimming device for headlights for automobiles and the like | |
US1995012A (en) | Lighting device | |
US1539090A (en) | Headlight | |
US20050036326A1 (en) | Lamp assembly with multi-stage reflector | |
JPH03503585A (en) | Headlight that can be directed downwards | |
US1923181A (en) | Vehicle headlight | |
US7033054B2 (en) | Lamp assembly with peripheral auxiliary function | |
US1230844A (en) | Device for arresting light-rays. | |
US1336967A (en) | Automobile-headlight | |
US1604370A (en) | Headlight dimmer | |
US1695824A (en) | Dimming headlights for automobiles | |
US2139707A (en) | Headlight system | |
US1655559A (en) | Electric vehicle lamp | |
US1235675A (en) | Headlight. | |
US1549987A (en) | Searchlight | |
US1625932A (en) | Nonglare attachment for reflectors | |
US1594748A (en) | Headlight | |
US1148650A (en) | Glare-guard for headlights. | |
US1671024A (en) | Lamp structure | |
US1557729A (en) | Illuminating mechanism | |
US1450642A (en) | Automobile headlight | |
US1577338A (en) | Headlight | |
US1591992A (en) | Headlight dimmer | |
US1277518A (en) | Headlight. | |
US1619617A (en) | Headlight |