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Патент USA US2408773

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Oct. 8, 1946. f
I'
c. J. GLAssÍx-:R
A2,408,772
VARIABLE DENSITY FILTER ATTACHMENT FOR BINOCULARS
Filed Feb. 1l, 1944
\//
2 Sheets-Sheet 1
ou. s, 1946.
_
c. J. GLAssER _
2,408,772
VARIABLE DENSITY FILTER ATTACHMENT FOR BINOCULARS
Filed Feb. 11, 1944
2 Sheets-¿Sheet 2
Patented Oct. 8, 1946
2,408,772
'ci
UNITED' STATES PATENT OFFICE
VARIABLE DENSITY FILTER ATTACHMENT
Y
`
FOR BINOCULARS
`
Charles J. Glasser, Chicago, Ill.
' Application February 11, 1944, serial No. 521,899
~
.
Y
My
invention
binoculars.
7 Claims.
(o1. sax-_34)
2
l
relates
to
polarizedv lens
l
_
leaf-spring tongues 2| struck up therefrom and
extending -inwardly for swivelling engagement
.
One of the objects of my invention is to provide
a polarized lens .attachment forv binoculars so
with the annular groove I'I in the connecting ring
constructed that the attachment may be applied
.to >any one of a plurality ofA binoculars of differ
ent interpupillary distances.
Further objects and advantages of the inven
tion will be apparent from the description and
The shell Iû comprises the bottom or rear plate
22, which is secured to the s mounting ring I8,
engagement with the rear plate 22 at 2t. The
rear plate 22 and cover 23 have portions extend
claims.
ing radially from their circular portions, form
‘
»
.
I5.
.
and a front or cover 23 having -a telescoping
ing the hinge extension I21which yhas a pivotal
connection with the corresponding hinge connec
tion I3 of the other shell, as shown in detail in
Fig. 5. The cover member 23 of the' shell has
ñrmly and nonrotatably securedzthereto the
front polarizing lens 4 'held in place against a
vFig. 2 is a front View‘of the polarized lens
ñange on the cover by means of a mounting ring
attachment, parts being broken away; '
25. Within the shell I0 is rotatably mounted a
Fig. 3 is a section on 'the line 3_3 of Fig. 2;
mounting ring 26 for the rear polarizing lens
Fig. 4 is a section on .the line 4-4 of Fig. 2;
and
'.
`
. "
20 4, which 'is secured to this mounting ring by
means of a securing ring 21, as shown in Fig. 4..
' Fig. 5 is a section on the line 5_5 of Fig. 2.
The relative rotative adjustment of the two lenses
The construction shown comprises a pair of
4 will vary the amount of light vtransmitted
binoculars I, which may be of any usual or suitable ~
therethrough as is Well understood. It is desir.
construction, and an attachment 2 to be applied
thereto comprising two pairs of polarized lenses 25 able that the percentage of light transmitted
through the two barrels should be maintained
4 and 5 positioned to lie in front of the rotarily
substantially constant in order to give the proper
adjustable eyepiece 6 'of the binoculars when the
depth and perspective to the objects viewed. This
attachment is applied. The binoculars comprise
object is accomplished by providing a cable trans
theusual two barrels 1 having hinge members 8
secured by means of a hinge pin 9 so that the 30 mission between the two rotatably mounted lenses
4 and 5 so that when one lens ¿i is turned clock
vbarrels may swing toward and from eac‘n other
wise by the user, the other‘lens 5 'will be turned
-to vary the interpupillary distance and the pair
clockwise automatically an amount >correspond
of focusing eyepieces 6 mounted to swing with the
ing to theradjustment of the iirst lens ll. As
barrels, respectively.
shown in Fig. 2, each'rotatable lens mounting 2%
The attachment comprises Vtwo` generally cir
is provided with a finger piece 28'which operates
cular shell members Il] and I I, in each of which
-In the drawings, in which an embodiment of
my invention is shown,
Figure 1 is a top plan View of a pair of binoculars
with the polarized lens attachment applied there
.
.
1
V
.
'
' apair of polarizing `lenses is mounted.
These
in an arcuate slot 29 in the shells Iû and II so
that either of these linger pieces may be operated
shell members have hinge extensions I2 and I3,
to eiîect a simultaneous adjustment of kboth of
respectively, which are pivotally secured together
tO'Drovide a hinge connection at I4 between the 40 the rotatably mounted lens mountings 26. The
mounting rings, backing member and cover may
two shells; The two shell members Il) and I'I are
be of any suitable material such as sheet metal
in general similar and symmetrical with respect
stampings. The cable transmission 3G between
to each other rand the description of one is ap
the two lenses may extend around the rotatable
plicable to the other. The shell member I0 is
attached to the eyepiece 6 by means of a con 45 mounting rings 26 and pass over suitable guide
means adjacent the axis 3| of hinge connection
necting ring I5 which may be of plastic or any
I4 between the two Shells I0 and II so that the
suitable material having a threaded portion IB
two shells may swing about their axis 3| without
for threading onto the front of the eyepiece 6 and
causing any rotary adjustment of the rotatable
an annular grooved portion Il for detachable
swivel engagement with the mounting ring I8 for 50 rear lenseswith respect to the front fixed lenses.
The hinge connection between the two shells
lthe shell Ill. The mounting ring I8 is secured
I and II comprises a hinge member 32 which
at I9 to the bottom of the shell Ill and has an
' inwardly-extending flange portion 20 for engage
may be of plastic or any suitable material having
ment with `the front edge of the connecting ring
_I5 and ay plurality of circumferentially-spaced `
a reducedportion 33 extending through register
ing openings in the rear plates 22 of the two
2,408,772
3
4
comprising a pair of hinge members, the mount
shells and a securing disc 34 between which and
ing for the polarized lenses comprising a second
the hinge member 32 the two inwardly-extending
pair of hinge members secured to said pairs of
annular flanges of the rear plates 22 are mounted.
lenses, respectively, said hinge members having
The hinge member 32 and securing member t6
are fastened together by means of bolts and nuts Ul provisions to enable the axes of said hinge mem
bers to be offset with respect to each other when
35. The securing member is shown as provided
with a glove button fastener 36, by means or" which
the attachment might be secured in a suitable
the lenses are mounted on the barrels whereby
the lens set may be used selectively with different
enclosing case, not shown. The cord guide 3l is
mounted in the central shell formed by the con
nection between the interengaging ends oi the
arms I2 and I3 of the shell members. This cord
guide has an upper guide portion 38 over which
binoculars having different lengths of hinge
members.
2. 'I'he combination with a pair of binoculars
including two barrels connected to swing about
a common axis for adjustment toward and from
each other, of a polarizing lens set comprising
two pairs of polarized lenses, one pair for each
barrel and detachably connected with respect
and designed that swinging adjustment of .the two
thereto mounted to swing about said axis with
the barrel, the two lenses of each pair being
shells I0 and II will not cause any relative rota'
juxtaposed, one lens being rotarily adjustable
tion between the rotatable rear lenses and vthe
front fixed lenses. With this construction, if the 20 with respect to the other, and belt transmission
means between said adjustable lenses whereby
two adjustable lenses are originally mounted so
rotarily adjusting one lens of one pair will cause
that when a maximum of light is transmitted
a corresponding rotary adjustment of a lens of
through the right-hand pair of lenses, the maxi
the other pair, the connection between the barrels
mum amount of light will also be transmitted
comprising a pair of hinge members, the mount
through the left-hand lenses, any adjustment
ing for the polarized lenses comprising a second
thereafter of the right-hand lens to lessen the
pair o_f hinge members secured to said pairs of
amount of light therethrough will automatically
lenses, respectively, said hinge members having
diminish proportionately the amount of light
provisions to enable the axes of said hinge mem
through the lefthand >pair of lenses, and vice
bers to be offset with respect to each other when
versa.
the upper run of the cable 30 passes and a lower
guide member 39 over which the lower run of
the cable passes. These guides are so shaped
In use, the attachment can be applied to the
binocularsby slipping the mounting rings i8 over
the connecting rings I5 which are threaded onto
the eyepieces 6 of the binoculars. The spring
tongues 2I snap into the grooves I1 to hold the
attachment firmly on the binoculars but allow
ing rotative movement of the connecting ring I5
with respect to the miounting ring I3. This enables the eyepieces 6 to be adjusted for focusing
without disturbing or causing rotation of the
mounting rings I8. The binoculars may be ad
justed to vary the interpupillary distance by
swinging ‘the barrels about the hinge pin Si.' This
also is accomplished without causing any relative
rotation between the front `and rear polarized
lenses 4 vbecause of the design of the cable trans
`mission 30 and associated parts. The rear rotat
able polarized -lenses may then be adjusted by
the lenses are mounted on the barrels whereby
the lens set may be used selectively with different
binoculars having different lengths of hinge
members.
3. The combination with a pair of binoculars
including two barrels connected to swing about a
common axis for adjustment toward and from
each other,»oi a polarizing lens set comprising two
pairs of polarized lenses, one pair for each barrel
and detachably connected with respect thereto
mounted to swing about said axis with the barrel,
the two lenses of each pair being juxtaposed, one
lens being rotarily adjustable with respect to
the other, belt transmission means between said
adjustable lenses whereby rotarily adjusting one
lens of one pair will cause a corresponding rotary
adjustment of a lens of the other pair, the con
nection between the barrels comprising a pair of
means of one or the other of the finger pieces 28
to vary the amount of light transmitted.
hinge members, the mounting for the polarized
The rotative adjustment of the focusing eye~
bers secured to said pairs of lenses, respectively,
said hinge members having provisions to enable
pieces 6 maybe accomplished without disturbing
the adjustment of the polarized lenses 4 and 5,
due to the swivel connection between the ring l 5
and the mounting ring I8.
Further modiñcations will be apparent to those
skilled in the art and it is desired, therefore, that
the invention be limited only by the scope of the
appended claims.
Having thus described my invention, what I
claim and desire to secure by Letters Patent is:
1. The combination with a pair of binoculars
including two barrels connected to swing about
a common axis for adjustment toward and from
each other, of a polarizing lens set comprising
two pairs of polarized lenses, one .pair for each
barrel and detachably connected with respect
thereto mounted to Vswing about said axis with
the barrel, the two lenses of each pair being
juxtaposed, one lens being rotarily adjustable
with respect to the other, and transmission means
between said adjustable lenses whereby rotarily
lenses comprising a second pair of hinge mem
the axes of said hinge members to be olîset with
respect to each other when the lenses are mount
ed on the barrels whereby the lens set may be
used selectively with different binoculars having
different lengths of hinge members, and guide
means adjacent the axis of said second pair of
hinge members for guiding said belt drive means.
4. The combination with a pair of binoculars
including two barrels connected and mounted for
adjustment toward and from each other and a
pair of focusing eyepieces swiveled on said barrels,
respectively, of a polarizing lens set comprising
two pairs of polarized lenses, one pair for each
barrel mounted to move toward and from each
other with said barrels and detachably connected
with respect thereto, the two lenses of each pair
being juxtaposed, one lens being rotarily adjust
able with respect to the other, and transmission
means between said adjustable lenses whereby
rotarily adjusting one lens of one pair will cause
adjusting one lens of one pair will cause a cor
a corresponding rotary adjustment of a lens of
responding rotary adjustment of 'a lens of the
other pair, the connection between the barrels
the other pair, the connection between the barrels
comprising a pair of hinge members, the mount
:2,408,772
ing for the polarized lenses comprising a second
pair of hinge members secured-to said pairs of
toward and from each other with said barrels,
the two lenses of each pair being juxtaposed, one
lenses, respectively, said hinge members having
lens being rotarily adjustable with respect to the
vprovisions to enable the axes of said hinge mem
bers to be offset with respect to each other when
other, and transmission means between said
the lenses are mounted on the barrels whereby
the lens set may be used selectively with different
binoculars having diiîerent lengths of hinge
lens of one pair will cause a corresponding rotary
adjustment of a lens of the other pair, the con
nection between the barrels comprising a pair of
adjustable lenses whereby rotarily adjusting one
members.
hinge members, the mounting for the polarized
5. The combination with a pair of binoculars 10 lenses comprising a second pair of hinge mem
including two barrels connected and mounted for
bers secured to said pairs of lenses, respectively,
adjustment toward and from each other and a
said hinge members having provisions to enable
pair of focusing eyepieces swiveled on said barrels,
the axes of said hinge members to be offset with
respectively, of a polarizing lens set comprising
respect tol each other when the lenses are mount
two pairs of polarized lenses, one pair for each
ed on the barrels whereby the lens set may be
barrel mounted to move toward and from each 15 used selectively with different binoculars having
other` with said barrels, each pair being provided
diiîerent lengths of hinge members.
rwith a detachable swivel connection with its eye
7. A polarizing apparatus for attachment to a
piece to enable adjustment of the eyepiece in
pair of binoculars, said binoculars including two
`dpendently of the pair of lenses the two lenses
barrels connected and mounted for adjustment
of each pair being juxtaposed, one lens being 20 toward and from each other and a pair of focus
rotarily adjustable with respect to the other, and
ing eyepieces swiveled on said barrels, respec
transmission means between said adjustable
tively, said apparatus comprising two pairs of
lenses whereby rotarily adjusting one lens of one
polarized lenses, one pair for each barrel to be
pair will cause a corresponding rotary adjust
mounted to move toward and from each other
25
ment of a lens of the other pair, the connection
with said barrels, the two lenses of each pair
between the barrels comprising a pair of hinge
being juxtaposed, one lens being rotarily adjust
members, the mounting for the polarized lenses
able with respect to the other, and transmission
comprising a second pair of hinge members se
means between said adjustable lenses whereby
cured to said pairs of lenses, respectively, .said
rotarily adjusting one lens of one pair will cause
hinge members having provisions to enable the 30 a corresponding rotary adjustment of a lens of
axes of said hinge members to be offset with
the other pair, the connection between the barrels
respect to each other when the lenses are mount
comprising a pair of hinge members, the mount
ed on the barrels whereby the lens set may be
ing for the polarized lenses comprising a second
used selectively with diiîerent binoculars having
pair of hinge members secured to said pairs of
.diñerent lengths of hinge members, one lens of 35 lenses, respectively, said hinge members having
each pair of lenses having a swivel connection
provisions to enable the axes of said hinge mem
with the eyepieces, respectively, whereby said
bers to be offset with respect to each other when
eyepieces may be- swivelly adjusted on the barrels
the lenses are mounted on the barrels whereby
, ' without disturbing the adjustment of the lenses
the
lens set may be used selectively with different
40
. with respect to each other.
l 6. A polarizing apparatus for attachment to
binoculars having diiîerent lengths of hinge
members, each pair of lenses having a swivel
a pair of binoculars, said binoculars including
two barrels connected and mounted for adjust
ment toward and from each other, said appa
connection with the eyepieces, respectively,
whereby said eyepieces may be swivelly adjusted
on the barrels without disturbing the adjust
ratus comprising two pairs of polarized lenses, 45 ment of the lenses with respect to each other.
, one pair for each barrel to be mounted to move
CHARLES J. GLASSER.
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