close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2119992

код для вставки
June 7, 1938.
R. w. JoHNsoN
2,119,992
REFLECTOR DEVICE
Filed April 17, 1935'
2 Sheets-Sheet 1
1N VEN TOR
£4 /
A TTORNE Y2
June 7, 1938.
R. w. JOHNSON
2,119,992
REFLECTOR DEVICE
Filed April 17, 1935
1 \llilliilllih 1
,. mlllailhllhllr lllil‘ll
2 Sheets-Sheet 2
a
j
INVENTOR
l0 "
BY ?ay Méd'ier $527507?
2,119,992
Patented June 7, 1938'
' UNITED STATES PATENT OFFICE
v " 2,119,992
BEFIECTOR DEVICE '
Roy Walter Johnson, wyomilll, Ohio,‘ assignor,
by mesne assignments, to Chrysler Corpora
tion, Highland Park, Mich” a corporation of
Delaware
Application April 17, 1935, Serial No. 16,881
6 Claims. (01. 88-82)
of the projected light and the re?ecting device,
My invention relates to re?ector devices pro
be of a certain minimum candle power, thereby
vided primarily for use on the rear ends and
sides of cars and also along highways to re?ect
back to an approaching automobile light rays
5 projected therefrom as by their head-iights'thus
serving as a danger signal to the operator of the
approaching vehicle; the invention relating more
particularly, though not exclusively,'to re?ector
devices of the type comprising a plate, or the
10 like, of glass, or other suitable material, pro
vided on a face thereof, and more especially its
rear face, with groups of re?ecting portions of
such form as to re?ect light rays projected
against the plate, as by an approaching auto
15 mobile, back to the approaching vehicle along
lines substantially parallel with the rays strik
ing the re?ector, and thus to the eyes of the
driver of the car.
'
To a?ord the necessary protection to ap
20 proaching vehicles and to render highway signals
satisfactorily operative,v it is necessary that the
re?ector device not only re?ect back the desired
amount of light to the operator of the approach
ing car when light projected against‘it by the
35 approaching car strikes the re?ector at a sub
stantially right angle to its face as when the
car is traveling in a path at a right angle to the
face of the re?ector device and in direct aline- I
, ment therewith on a substantially level road; or,
30 in other words, in accurately alined relation to
the re?ector device, but also when the light
strikes the re?ector at an angle thereto from
either above or below or from either side of
v the re?ector, as for example, when the approach
:5 ing car is traveling in a path oifset laterally in
either direction from the path of the car ahead
and equipped with the re?ector device.
It is therefore a purpose of my'invention that
the re?ecting portions of the device be so formed
40 and relatively positioned as to cause the area of
the re?ector device rendered luminous to the
driver of the approaching car by the light rays
cast upon it, to be divided into relatively large
area zones of, intense luminosity, preferablyv of
45 the maximum intensity, observable by the driver
of the car in approaching the device either .di
providing a construction which will function to
obtain results heretofore possible only with a
much more expensive construction.
,
5
As a preface to the following description it
may be stated that the invention may be em
bodied in a structure provided solely for the re
?ective purpose or if desired, in a structure such ‘
as a tail light comprising the re?ective feature 10
referred to with a source of light to the rear of
the re?ecting element preferably with provision
for the transmitting of the light from such source 1
throughthe re?ecting element, whereby the de
vice serves to display an illuminated signal to 1'5 '
the driver of an approaching car, either through
the medium of the light source referred to or,‘
if extinguished, the medium of the re?ecting
projections.
‘_ Referring
to
the
accompanying
drawings 20
which show my invention embodied in a struc
ture designed particularly for use wheregillumi
nation is to be effected by light projected against
it by an approaching car;
Figure 1 is a face view of ‘a re?ector structure "25' ‘
embodying my invention.
-
,
_
Figure 2 is a section‘ taken‘ at the line 2 on
Fig. 1 and viewed in the direction of the arrow.
Figure 3, an enlarged view like Fig._ 2 of a frag
ment of the structure shown in Fig. 2.
30
Fig. 4 is a face view of a modi?ed form of my
re?ector drawn to a smaller scale than the Fig’,
1 re?ector.
Fig. 5 is a section taken at the line 5 on Fig. 4
and viewed'in the direction of the arrow. A
35
Fig. 6 is a face view of a further modi?ed form
of my re?ector also drawn to a smaller scale
than the Fig. 1 re?ector.
Fig. '1 is a section taken at the line ‘I onFig. 6
and viewed inithe direction of the arrow.
The construction shown comprises a plate-like ~
member 4 commonly termed a lens, preferably
transparent and made of glass or other suitable
material, preferably colored as desired, red glass
being commonly used in structures‘ of this same 45
general character.
'
The member 4 is provided with rearwardly ex
tending re?ector portions or units shown as in
offset therefrom in either direction within'certain the form of projections 5 on the rear face of
limits, respectively, regardless of the position of _
the member 4 the projections being shown as 50
50 the source of projected light above or below the closely spaced (though this is notessential to my
re?ector device within the required range, and
thus comply with such highway regulations as invention) and covering a large part of the rear
area of the member 4._
require that the areas of the device rendered face
The member 4 with its projections 5 is pref
luminous to the driver of the approaching car
55 in the different relative positions of the source erably made, as a matter of commercial expe- 55
rectly in front of the re?ector device or laterally
2 .-
2.11am
diency. by molding the member and projections,
as for example of glass. as an integral one-piece
As has been found desirable in re?ector devices
a 'of this general type, the front face I of the
member 4 is of spherical contour and the pro
jections I likewise lie within a spherical surface
_ substantially concentric with the spherical face I.
The re?ecting projections I as shown and pref
10 erably provided, are in the form of right cones
with their bases of hexagonal shape whereby the
v bases of the cones inter?t with each other as
shown in Fig. 1, though such close spacing and
the provision of the bases of the‘cones of hex
16 “Dual shape, is not necessary.‘
-
The providing of the projections I in the form
1 from about 10' to about 20° and new les
hibitsits greatestluminodty whentheamrceof
of
projected
there?ectortotherightinl'iglfromabmt
light is laterally offset from
10° toabout zo'.
'
,
v1.
Aswiilvbeinthemanufactlne'of’
the devices for general use, it is not comma-I
cially feasible that the projections I bemadeop
tically perfect nor is such perfection‘ ncces-ry
in a-practicalconstruction of re?ector-glow- u
ever, in the manufacture of the device it is ‘the
of cones is preferred as a practical matter, more
particularly, as such form of projections may be aim to provide the cone-projections as neariyd
made very economically. However, as will be‘
20 readily understood the re?ecting projections may
It will be understood that the principle ell-'8
be provided of any other suitable form.
In, accordancev with my invention the projec
tions I are so relatively disposed as to provide
different zones of maximum luminosity observ
rightconeshapeaspracticallymssible.asthere
byltisbelievedthebestresultsareobtainahh.
25 able, respectively, from di?erent positions rela
tive to the. axis of the re?ecting device. In the
particular construction shown three oi-such zones
are provided, viz.: a central zone ‘I, shown by the
dotted lines in Fig. 1 as of ‘hexagonal contour;
so, and two lateral zones I and I which together
surround the zone 1, the zone I comprising the
half of the re?ecting device at the left-hand side
of Pig. 1 partially surrounding the zone ‘I, and
the zone I comprising the remaining half of such
'35‘ part of the re?ecting device. The zone 1 is pro
vided to re?ect back light rays to the driver of
an approaching car when the car is directly in
line with the re?ector device; and the zones I
and I are provided to re?ect the light rays back
40 tothe driver when the source of projected light
on the approaching car is laterally o?set from
the axis of the re?ector to the left and to the
right, respectively, in ‘Fig. 1, as for example as
has been found in practice, up to about 20 de
45 grees, thereby providing relatively large zones of
luminosity which serve as a warning signal to
the driver of an approaching car whether he is
approaching the. signal device head on or in'
laterally o?'set position to either side. In Fig.
50 lthezonesland Iareshownaslightlysurface
shaded to indicate that these zones- are less lu
minous than the zone 1 when light rays are pro
, jected to the device in a path at a substantially‘
right angle tow-the face of the device.
_
55. The several zones '1, I, and 9 are provided for
in the construction shown by forming all of the
re?ecting projections I within the zone "i with
bodiedinthedeviceshownandutiliaedby'thepro
visionofthesidezi'mesl'andI,mayahlobelsu-Yv
bodiedinadeviceinwhichsimilarzonaarenec»
cssaryforthedesiredofthe
I
projected to the device at an angle to the-axisjof a
the latter either from above or below such axis.
Insuchcasebywayofexampletheaon'eofre
?eeting portions fortherays proiectedto thede- ,
vice from above saidaxismaybeprovidedabove
the central'zone of lt?ec?m portions, andgthe a
tothedevicefrombelowsaidaxismaybepmvid
zone of re?ecting portions for therays
edbelowsaidcentrallonmtheseupperandlower
zones being preferably providedinaddi?on tothe
zones fortherayspmjcctcdtothedevice'at-an '
vice,asexempli?edbythezoneslandl,which
angletoitsaxis romdther lateralsideof
latter-,inthecmofthiapatticular
preferablypanl'lelandhicliningin
arearwarddirec?onfromabovewward?ieaxis
oi’thedeviceandtheaxesofthe
par-V
tions fortherayspmjectedfrmnbelowtheaxh'
ofthedevicebeingpreferablyllre
allelandin
rearwardiyfrombelowioward
theaxisofthedevice.
~
'
~
Theembodyingofmyinventioninataillight-il‘
lensut?izingthelig‘htbehindthelena'to?'d "
example, the ~
beformedwithaportion?lereofnon-obltruetivei
' ‘_'
their-axes parallel and parallel with the axis of 1 totheoflishtrmfromth'e '
rearsourceoflighttothefronhashy
00 II (on Fig. 3) associated with such of the pro-.
jections I of zone ‘I as are shown in fragmentary
view Fig. 3. The zone I is provided for by form
ing all of the projections-I within this zone with
their, axes parallel and horizontal and disposed
' as ‘in rearwardly converging relationship to the axes
ofthe projections I of zone 1. at an-angle of pref
erahly'about 10', as indicated by the lines II in
fragmentary vie ‘Fig.3. The zone I is provid
ed for by forming all of the projections I with
70 in this aonewith their axes parallel and hori
aontal and disposed in rearwardly converging re
lationship to the axes of the projections I of
zone ‘I at’an angle ofpreferably 10". Thus the
Projections I of- both zones 8 and I incline rear
‘15' ‘wardlytowardtheverticalpianeoftheaxisof
'
.
3
' 2,119,092
sion of an intensity greater than that ordinarily
afforded by my Fig. 1 arrangement of parts, I
therefore preferably makeprovision for the re
quired direct light transmission by the omission
‘
re?ecting portion of the rear face'of. said body.
the axes of the. units'of each of said groups‘ being
substantially parallel to each
other, the units of '
each of .saidgroups having their axes lying at
acute angles with the axes of the/units of the
of certain projections or by spacing the projec- ,
remainder
of said groups whereby the re?ecting tions as aforesaid.
~
units of each of said groups re?ect light generally
In Figs. 4 and 5 I have illustrated a tall-light toward light sources lying in directions spaced
lens 49' which is primarily adapted for use as a from light sources‘which cause other of said unit
tail light lens. This lens 4* is identical in struc - groups to re?ect light-therefrom, only one of said 10
groups of re?ecting units being adaptedv at any .
10 ture and operation with lens 4 - (as indicated by the
use of similar reference characters for corre- ' ' time to re?ect light received from a light source
‘sponding parts) with the exceptionthat an area
with the maximum inherent intensity of light
12 is provided, preferably at the lens center, which ' re?ection for‘gsuch unit group, said front face
has no projections 5. This area i2 permits pas
‘presenting smooth surface portions thereof re
15 sage of ‘considerable light forwardly from the tail
light source of illumination directly through the
lens as aforesaid.
'
spectively’in front-‘of each of'said-groups of re
?ecting’ units.
-
,.
’ 2;‘A cover'for a motor vehicle tail lamp, .com
'
In Figs. 6 and'i I'have illustratedla tail light‘ prising, a unitary transparent body having a ‘front
lens I“ which is also primarily adapted for use face adapted to be presented generally toward a
as a tail light lens. This lens this also identical source of~lig_ht' to be re?ected and a rear face
in. structure and operation with lens 4 (as indi- .1’ adapted to be presented generally toward a lamp
cated by the use of similar reference characters illuminator, said body transmitting light from
for corresponding‘parts) with the exception that
said lamp illuminator directly forwardlytthere
the projections 5 are spaced from each‘ other through, said body having a plurality of. groups
l3 which permit pas- ' of substantially contiguous internally re?ecting
25 su?iciently to provide areas
sage of considerable light forwardly from the tail units formed integrally with said body and pro
light source of illumination directly throughthe
jecting rearwardly to form at least a portion ofv _ '
lens as aforesaid.
said rear face for re?ecting light back ‘in the
The luminosity of the entire lens when observedv
so
approximate direction of said light source, each of
said units having a re?ecting surface of revolu
by the approaching motorist is, of course, the
result of. light striking the lens zones each of
which zones has re?ector units whose optical axes,
tion tapering in a direction rearwardly from said
‘body, the axes of the units of each of said groups
while parallel to each other, are inclined as a
being substantially‘ parallel to each other, the
‘group with respect to the optical axes of the re
35 ?ector
The units
opticalofaxis
the remaining
of each re?ector
lens zones.
unit, as ap
‘ plied to the subject matter of the present inven
axis of light approach
tion is, of course, thatre?ecting
ranges laterally
which results inequal
units of each of said groups having their axes
lying at acute angles with the axes of the units
of the remainder of said groups whereby the
re?ecting units of each of said groups re?ect light
generally toward light sources lying in directions
spaced from light sources which cause other of
to each side of such optical axis. The mechani-. said unit groups to re?ect lightjtherefrom, only
cal axis of each re?ector unit, as applied to the one of said groups of re?ecting units being adapt
subject matter of the present invention is, of ed at any time to’ re?ect light received from a
course, that axis about which the re?ecting sur
light source with the maximum inherent intensity
face portions of each unit are symmetrically of light re?ection for such unit group, said front
face presenting a smooth substantially spherical
45 formed.
)
In the illustrated embodiments of my invention surface in front of said plurality of groups of re
I each re?ector unit
axis at H is a mechanical .
axis as well as an optical axis of such unit so that.
in the present instance, inclining the
y mechanical '
50 axes of the re?ector units 5 of zones or groups 8
?ecting units.
_
3. A cover for a motor vehicle tail lamp, com
prising, a unitary transparent body having a front
face adapted to be presented generally toward a
source of light to be re?ected and a rear face
and 9 will‘ give the desired effect of inclining the
optical axes of the respective re?ector unit groups. - adapted to be presented generally toward a lamp
While I have illustrated and described a certain illuminator, said body transmitting light from
particular construction embodying my invention said lamp illuminator directly forwardly there
55 and have described another embodiment thereof through, said body having a plurality of groups
I do not wish to be understood as intending to ‘of internally re?ecting units formed integrally
limit it thereto as the same may be variously , with said body and projecting rearwardly to form
modi?ed and altered and the invention embodied at least a portion of said rear face for re?ecting
in other forms of structure without departing
60 from the spirit of my invention.
What I claim as new, and desire to secure by
Letters Patent, is:
1. A' cover for a motor vehicle tail lamp, com
prising, a unitary transparent body having a front
65 face adapted to be presented generally toward a
source of light to be re?ected and a rear face
adapted to be presented generally toward a lamp
illuminator, said body transmitting light from
said lamp illuminator directly forwardly there
70 through, said body having a plurality of groups of
internally re?ecting units formed integrally with
said body and projecting rearwardly to form at
' light back in
the approximate direction of said
light source, each of said units having a re?ecting
surface of revolution tapering in a direction rear
wardly from said body, the axes of the units of
each of said groups being substantially parallel
to each other, the units of each of said groups
having their axes lying at acute angles with the
axes of the units of the remainder of said groups
whereby the re?ecting units of each of said groups
re?ect light generally toward light sources lying
in directions spaced from light sources which 70
cause other of said unit groups to re?ect light
therefrom, only one of said groups of re?ecting
units being adapted at any time to re?ect light
least a portion of said rear face for re?ecting light . received from a light source with the maximum
back in the approximate direction of said lightv
75 source, each of said units providing an internally
inherent intensity of light re?ection for such unit 75
;-. v~
7..“
1M there
therefrom, onlyone ofgsaid' groups of
units being adapted. at any timeto
‘i
light.
internally re?ecting
I_' pin-tiara! the in: face of antibody, the axes
'joftheunitsofeachdsaid'grombeingsuhstan
towardasourceoflightto
._‘?ally_plrnlleltoeachother,theunihofeachof andarearface,saidbodyhavingaplurality-ot.
groups of substantially contiguous internally re
?ecting units formed integrally with said body
and projecting rearwardly to form at least a- por
tion of saidrear face for re?ecting light back in‘
the approximate direction of said light source. .
each of said units providing an internally re?ect
v ing-portion of the rear face of said body, the axes
of the units of each of said groups being Sllbstane
tially parallel to each-other, the units of-each'of
said groups having their axes lying at acuteanglsi
with the axes of the units of the remainder of said
iardeetoreunprislngaunitarytranspar
Y
ventbodyhavlngfafrontfaeeadaptedtobepre
towardasourceoflighttobe
"
groups whereby there?ectlng units oi'each of
said groups re?ect light generally toward‘light
sources lying in directions spaced from light
sources which cause other of said unit ,gmups to
re?ect light therefrom. only one oi’ said groups of
v‘re?ecting units being adapted at any time to re
?ect light received from'a light source with‘ the
maximum inherent intensity of light re?ection for
such unit group, said front face presenting a
smooth substantially spherical surface in front a
“mailman internally
portion of the of said plurality of groups of re?ecting units.
mmeumnmbooynneammmeumwor
' ROY WALTER Johnson.
Документ
Категория
Без категории
Просмотров
0
Размер файла
717 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа