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Патент USA US3046872

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July 31, 1962
H. MULLER
3,046,862
PHOTOGRAPHIC OBJECTIVE MOUNT
Filed Feb. 20, 1961
F.@ I
IN VEQIITOR
HELMUT MULLER
“MAM
Alforneys,
,.
United States Patent _" IC€
actassz
Patented July 31, 1962
2
1 .
a lever at one end thereof which is engaged by the camera
3,046,862
PHOTOGRAPHIC OBJECTIVE MOUNT
Helmut Miiller, Wetzlar (Lahn), Germany, assignor to
Ernst Leitz Gesellschaft mit beschrankter Haftung,
Wetzlar (Lahn), Germany
Filed Feb. 20, 1961, Ser. No. 90,436
Claims priority, application Germany July 7, 1960
8 Claims. (CI. 95-45)
release mechanism. The other end of the bolt is pro
vided with a structure which is drivingly connected to a
movable component such as a spring diaphragm.
. In addition, one of the bolts may have an ‘axial bore
therethrough to serve as a cable duct for an electrical wire
which interconnects electrical components located at both
ends of the guide elements.
In each of the above-described modi?cations the guide
The present invention‘relates to a photographic objec 10 elements are also used ‘as transmission members which
tive of a camera, more particularly, to an objective having
telescopic sleeve members wherein the guide elements between the sleeves to axially guide the sleeves and prevent
means that no additional elements are necessary to trans
mit mechanical or electrical energy from the camera cas
ing to a movable component in the objective. As a result,
rotative movement therebetween also function to trans
the exterior diameter of the objective mount need not be’
mit adjusting movements from an adjusting member on 15 enlarged but the objective mount of this invention will per;
the camera to a moveable component mounted on the ob
form more functions than objective mountings of the prior‘
jective.
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art.-
Photographic objectives for cameras have been devised
which comprise a pair of'telescoping cylindrical sleeves.
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Other objects and advantages of this invention will be->
come apparent upon reference to the accompanying de~
Guide elements have been interposed between the sleeves 20 scription when ‘taken in conjunction with the following
in order to axially guide the sleeves and‘to prevent rela
drawings, wherein »
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tive rotative movement between the sleeves. One form of
‘ FIGURE 1 is a partial longitudinal sectional View of
guide structure comprises pairs of cooperating grooves in
arr-objective mount having a spring diaphragm in the objec- ~
tive and an adjusting member in the camera casing;
FIGURE 2 is a cross-section taken along the line A--A
adjacent surfaces of the sleeves with circular rods ‘being
positioned in each pair of grooves. >
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The resulting guide arrangement is very simple and
of FIGURE '1;
economical to manufacture and provides a very precise
FIGURE?) is a transverse sectional view of the objec~
tive illustrated in FIGURE 1, showing the cross-sec
In some objectives, however, movable components are
tional shapes of the guide elements.
provided therein, which components may be, for example, 30 A speci?c embodiment and several modi?cations of this
a spring diaphragm. Structure must then be provided for
invention will next "be described with reference to the ac
guide structure for the axial movements of the sleeves. '
guiding this component, preferably by actuation of an ad- ~
oompanying drawings wherein like reference symbols indi
justing member mounted on the camera casing. It is there
fore necessary to devise an arrangement for transmitting
the movement of the adjusting member to the movable
cate the same parts throughout the various views.
component.
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Returning to FIGURE 1, there is shown an objective 1
havng a stationary mount 2 with bayonet connections 3
extending‘therefrom to be lockingly received in similarly
’
The present invention discloses a structure whereby the
shaped grooves located in the camera casing 4. The ob
guide elements between thecylindrical sleeves of an ob
jective mount 2 has an axial bore 5 within which is re
jective can be used for additional purposes including the
ceived a bolt 6 which is biassed outwardly by a spring
transmission of movement between an adjusting member 40 7. When the objective is assembled on the camera casing
on the camera casing and a movable component in the'ob
the bolt 6 registers with a pin 8 which is operatively con
nected with the release mechanism of the camera but not
It is therefore the principal object of this invention to
shown in the drawings. When the release mechanism is
provide a novel and improved objective mount for a
actuated the bolt 8 moves axially towards the objective
to depress the bolt 6 against the action of the spring 7.
It is another object of this invention to provide a photo
The other end of the bolt ‘6 has a tapered point 6a
graphic objective having structure therein to transmit en
which meshes with a lever arm 9 which, in turn, extends
ergy from one end of the objective to the other but where
radial-1y outwardly from a square bolt 9a. The square
in the overall diameter of the objective is not enlarged.
bolt 91: is received within a square axial bore in a round '
In the present invention the rod-like guide elements
guide element 10 which is received between registering
interposed between the cylindrical sleeves are mounted
axial grooves 11 and 12 in the telescoping sleeves 14 and
jective.
camera.
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so as to be axially displaceable such as a push-rod in
order to transmit mechanical movement from the camera
casing to a movable component mounted on the objec
15, repectively.
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.
- As can be seen in FIGURE 3 the registering grooves
11 and 12 form a substantially square spacing within
which the guide element 10 is rotatable.
. The present invention also provides for utilizing two
Rotation of the guide element 10 will also rotate the
or more of the‘ guide elements for transmitting energy
square bolt 9a which is received therein.
from the camera casing of a movable component located
The sleeve 14 has an outer ?ange 16 which is ?xedly
in the objective. One of the guide elements may have a
connected
tov the stationary objective mount 2. There is
circular cross-section so as to be both rotatably and 60 a ?ange 17 which connects the ?ange 16 with the sleeve
axially movable within its pair of grooves. Accordingly,
14 and there is an opening 18 through the ?ange 17
several functions can be performed by a single guide ele
through which the square bolt 9a passes.
ment. Axial movement of the element can control one
Two additional rod-like guidingelements 19 and 20
‘function and rotative movement of the element can
are positioned between the sleeves 14 and 15 in the same
65
control another function.
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manner as the guide element 10. The guide elements .10,
One of the guiding elements is provided with an axial
19 and 20 are positioned approximately 120° apart. These
tive.
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bore through which passes a bolt which has means on
both ends thereof for drivingly connecting with'an adjust
guide elements axially guide the tube or sleeve 15 within '
which are mounted a plurality of lenses by means of a
ing member on the camera casing and a movable com
cylindrical mount 22.
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ponent on the objective. The bore is of a non-circular 70 .The focussing of the objective is accomplished by axial
shape and the bolt has a non-circular- cross-section which
displacement of the sleeve 15. The sleeve 15 is provided
corresponds to the cross-section of the bore. The bolt has '
with external threads 23 which mesh with internal threads
3,046,862
4
‘24 of an adjusting sleeve 26 developed as a knurled an
nular ‘band 25. The knurled band 25 together with the
adjusting sleeve 26 are secured against axial displacement
bv a ?ange 27 which is integral with the adjusting sleeve
26 and which engages a notch 13‘ in the outer ?ange 16.
p The guiding elements 19 and 29 are also axially dis
placeable within their pairs of grooves but are limited in
This it can be seen that the present invention dis~
closes a photographic objective wherein elements for guid
ing the axial movement of telescoping sleeves in an ob
jective are ‘also used to transmit either mechanical or‘
electrical energy from one portion of the objective to
another portion thereof.
It will be understood that this invention is susceptible
to modi?cation in ‘order to adaptmit to different usages and
conditions and, accordingly, it ‘is desired to- compre
The axial movement of the guide element 10 is limited 10 hend such modi?cations within this invention as may fall
their axial movement by a shoulder 29 formed as an ex
ternal flange on the sleeve 14.
in one direction also by the ?ange 29 and in the other
direction by the ?ange 17 of bolt 9a or the lever 9 and
the pin 6.
A second square bolt 30a is pivotally mounted journaled
within the scope of the appended claims.
What I claim is:
1. In a photographic objective having a moveable coin
ponent, the combination of a pair of telescoping cylindri
at 31 ‘and has a locking lever 32 on the outer end thereof. 15 cal sleeves, there being a plurality of pairs of cooperating
axial grooves in the adjacent surfaces of said sleeves, a
The bolt 30a is received within a square axial bore 30
corresponding plurality of rod-like guiding elements posi~
which passes through the guide element 10. The bolts
tioned in said pairs of grooves so that said sleeves are
9a and 30:; are loosely connected into the square opening
axially moveable withrespect to each other but rotary
30 so as to prevent the square bolts from determining .
the position of the circular guide element 10 with respect 20 movement therebetween is prevented, and means on one
of said guiding elements for drivingly interconnecting a
to the faces of the grooves 11 and 12.
moveable objective component with an adjusting means on
The locking lever 32 is biased into the locking position
by a spring 33, as shown in FIGURE 2, and has a lock
the camera so as to transmit the adjusting movements to
ing nose 34 which engages a member 35:; mounted on
the moveable objective component.
2. In a camera, the combination of an objective having
a spring diaphragm mechanism 35 in a known manner.‘ 25
a moveable component thereon, means on said camera for
In the operation of the above-described structure the
diaphragm is closed to its predetermined opening when
adjusting said moveable component, said objective com
prising a pair of telescoping cylindrical sleeves, there
the release mechanism of the camera is actuated. Upon
being a plurality of pairs of cooperating axial grooves in
actuation of the release mechanism the pin 8 will be
moved to the left as viewed in FIGURE 1, and this move 30 the adjacent surfaces of said sleeves, a plurality of guiding
elements positioned in said pairs of grooves so that said’
ment is transmitted to the pin 6. The tapered point 6a
sleeves are axially moveable with respect to each other
will cam against the lever 9 to cause a pivoting of this
but rotary movement therebetween is prevented, and
lever about the axis of the circular guide element 101.
means on one of said guiding elements for drivingly inter
As a result, the locking lever 32, which is also coupled
connecting said moveable objective component with said
with the guide element 10, also performs a pivoting move
adjusting means so that the adjusting movement is trans
ment. The pivoting movement of the locking lever 32
mitted to the moveable objective component.
will put the locking nose 34 out of the path of movement
3. An objective comprising a moveable component, a
of the member 35a. This will permit the springs actuat
pair of telescoping cylindrical sleeves, there being a plural
ing the diaphragm to rotate the diaphragm blade ring in a
direction to close the diaphragm opening to the previously 40 ity of pairs of cooperating axial grooves in the adjacent
surfaces of said sleeves, a‘corresponding plurality of rod
selected size. The operation of ‘such a spring diaphragm
like guiding elements positioned, in said pairs of ‘grooves
is conventional and need not be described in detail.
The driving connection between the arm 9 and the lock
ing lever 32 is also maintained during the focussing of
the objective. Thus, during the axial displacement of the
so that said sleeves are axially moveable with respect to
each other but rotary movement therebetween is pre
vented, and means on one of said guiding elements for
drivingly interconnecting said moveable objective com
cylindrical lens mount 22 the connection between the
arm 9 and the locking lever 32 is maintained since the
length of the square bolt 30a is adjusted to the extension
transmit the adjusting movement of the member to the
of the cylindrical sleeves.
moveable objective component.
ponent with an adjusting member on a camera so as to
The guide elements 10, 19 and 20 function as axial
4. An objective comprising a moveable component, a
guides for the telescoping sleeves during the focussing
pair of telescoping cylindrical sleeves, there being a plural
ity of pairs of cooperating axial grooves in the adjacent
‘of the objective. The diameter of the guide elements is so
chosen that they all engage the faces of the registering
pairs of grooves, such as 10‘ and 11. The rotation of the
guide arm 10 for the axial displacement thereof occurring
during the adjustment of the diaphragm will not aifect in any way the functioning of the guide arm 10‘ as an axial
guide between the telescoping sleeves.
surfaces of said sleeves, a corresponding plurality of rod
like guiding elements positioned in said pairs of grooves
so that said sleeves are axially moveable with respect to
each other but rotary movement therebetween is pre
vented, one of said guiding elements being axially move
one guide element used to transmit mechanical move
able in a pair of grooves and interconnecting said move
able component and an adjusting member of the camera
so that ‘axial movement of said one guiding element actu
ment through the objective, it is pointed out that the guide
ates said moveable component.
While the'above-described embodiment has shown only
elements 19‘ and 20 can be used to‘ also transmit adjusting
movements either in an axial or rotative direction.
The guide elements may be merely provided with an
axial borer and electrical wires may be passed therethrough
to interconnect electrical components which are mounted
adjacent both ends of the axial guides. Thus, a hollow
guide element may serve as an electrical conduit.
While the described embodiment related to the use of
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5. An objective comprising a moveable component, a
pair of telescoping cylindrical sleeves, there being a plural
‘ity of pairs of cooperating axial grooves in the ‘adjacent
surfaces of said sleeves, a corresponding plurality of rod
like guiding elements positioned in said pairs of grooves
so that said sleeves are axially moveable with respect to
each other but rotary movement therebetween is pre
vented, and means on one of said guiding elements for
the ‘guide element with the release mechanism of the
camera it is pointed out that any other adjusting mem
drivingly interconnecting said moveable objective com
her on the camera may be used to guide pin 8 so as to
transmit the adjusting movement of the member to the
moveable objective component, one of said guiding ele
transmit the adjusting movement of the member by means
of the guide element to a moveable component mounted
in the objective.
ponent with an adjusting member on a camera so as to,
ments having a circular cross-section so as to be rotatable
75 about its own axis within its pair of grooves, and means
as.Q.
aces-e62
on said rotatable guiding element for driving-1y intercon
necting said moveable objective component with an ad
is prevented, one of said guiding elements having a round
justing member on the camera so as to transmit the ad
cross-section so as to be rotatable within its pair of
grooves and having an axial bore therethrough of poly
justing movement to the moveable objective component.
gonal cross-section, a bolt slidably mounted within said
6. An objective comprising a moveable component, a 5 axial bore and having a cross-section corresponding there
pair of telescoping cylindrical sleeves, there being a plural
to, and means on one end of said bolt for operatively
ity of pairs of cooperating axial grooves in the adjacent
connecting with an adjusting member on the camera and
surfaces of said sleeves, a corresponding plurality of rod
means on the other end of said bolt for operatively con
like guiding elements positioned in said pairs of grooves
necting with said moveable objective component.v
so that said sleeves are axially moveable with respect to 10 ’ 8; An objective comprising a moveable objective com
each other but rotary movement therebetween is pre
ponent, a pair of telescoping cylindrical sleeves, there
vented, cne of said guiding elements being both axially
I moveable and rotatable in its pair of grooves, ‘and means
being a plurality of pairs of cooperating axial grooves in
the adjacent surfaces of saidsleeves, a corresponding plu
on said one guiding element for drivingly interconnecting
rality of rod-like guiding elements positioned in said pairs
said moveable objective component with an adjusting 15 of grooves so that said sleeves are axially moveable with
member 011 the camera so that movement of the adjust
ing member is transmitted to the moveable objective
component.
.
.
respect to each other but rotary movement therebetween
is prevented, there being an axial bore in one of said guide
elements, there being electrical circuit components on
7. An objective comprising a moveable objective com
both sides of said guiding elements and an electrical lead
ponent, a pair of telescoping cylindrical sleeves, there being 20 passing through said axial bore in said ‘one guiding ele
ment and connecting said electrical components.
a plurality of pairs of cooperating axial groovesrin the
adjacent surfaces of said sleeves, a corresponding plurality
of ‘rod-like guiding elements positioned in said pairs of
References Cited in the ?le of this patent
grooves so that said sleeves are axially moveable with
UNITED STATES PATENTS
respect to each other but rotary movement therebetween 25 2,969,008
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Ferrari ______________ __ Ian. 24, 1961'
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