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Патент USA US3070399

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Dec. 25, 1962
vc. BAUR ETAL
STRUCTURE FOR R
TO A
VABLY CONNECTING A DEVICE
PPORT THEREFOR
Filed March 9, 1959
3,070,389
5 Sheets-Sheet l
INVEN TOR.
Y
BY
CARL BAUR
Emcn suncsn
JOACHIM NDTZEL
Dec. 25, 1962
C. BAU R
ETAL "
3,070,389
STRUCTURE FOR REMOVABLY CONNECTING A DEVICE
TO A SUPPORT THEREFOR
Filed March 9, 1959
3 Sheets-Sheet 2
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Dec. 25, 1962
BAUR ETAL
STRUCTURE FOR c.
REMOVA
CONNECT
TO
Filed March 9, 1959
3,070,389
_A DEVICE
3 Sheets-Sheet 3
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BY
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CARL BAEAJR
ERICHLBURQGER
IOACHIM NOTZBL
M1
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‘ United States
4 atent
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CC
3,070,389
Patented Dec. 25, 1962
I
2
3,070,389
of a camera shown in cooperation with a fragmentarily
and sectionally illustrated camera housing;
FIG. 2 is a sectional plan view taken along line 11-11
of FIG. 1 in the direction of the arrows, the objective be
ing omitted from FIG. 2 for the sake of clarity;
FIG. 3 is a sectional elevational view taken along line
III-III of FIG. 2 in the direction of the arrow;
STRUCTURE FOR REMGVABLY CONNECTING A
DEVICE TO A SUPPORT THEREFOR
Carl Baur, Baldham, near Munich, and Erich Burger and
Joachim Notzl, Munich, Germany, assiguors t0 Firma
Agfa Aktieugesellschaft, Leverkuseu-Bayerwerk, Ger
many
Fiied Mar. 9, 1959, Ser. No. 798,287
Claims priority, application Germany Sept. 14, 1956
13 Claims. (Cl. 287-205)
FIG. 4 is a plan view of a ring which forms part of
the assembly of FIGS. 1—‘3;
10
FIG. 5 is a fragmentary, partly sectional, elevational
The present invention relates to releasable connecting
arrangements, and is a continuation-in-part of Serial No.
682,777, ?led September 9, 1957, and now abandoned.
More particularly, the present invention relates to con
necting arrangements where a device is releasably con 15
nected to another device or a suitable support. For exam
mg.
Connections of this type at the present time have several
disadvantages. On the one hand they must be quite
precise, and this precision greatly increases the cost of
the structure. It is extremely di?icult to reduce the cost
and still maintain the desired precision of the connection.
It is accordingly one of the objects of the present in 25
type which is relatively simple and inexpensive and which
at the same time maintains the necessary precision in the
view showing a third variation of a structure according to
the present invention.
The invention is illustrated in the drawings as used in a
ple, the present invention is adaptable to the connection
of an objective assembly releasably with a camera hous
vention to provide a connecting arrangement of the above
view of another embodiment of a releasable connecting
arrangement according to the present invention; and
FIG. 6 is a fragmentary partly sectional elevational
camera for releasably connecting an objective assembly
with the housing of the camera. In the embodiment of
FIGS. ‘1-4 the objective assembly 4 forms the device
which is releasably connected with the camera housing 1,
this camera housing 1 forming a support means which is
provided with an opening into which the lower portion of
the assembly 4, as viewed in FIGS. 1 and 3, extends. The
support means which carries the device 4 includes in addi
tion to the member 1 a bearing means for a spring ring 7,
and this bearing means includes a ring 3 which is ?xed to
the housing 1 by the screw members 2. The ring 3 pro
vides the support means with an exterior annular surface
connection of a device such as a camera objective with
3a which is engaged by an annular surface 4' of the objec
the camera housing.
30 tive housing 4 when the latter is in the assembled condi
Another object of the present invention is to provide a
tion illustrated in FIGS. 1 and 3. The bottom portion of
releasable connection of the above type Which is capable
of reliably holding the device in its assembled condition
the housing 4 extends beyond the surface 30 into the open
ing of the support means 1, 3. This bearing means for
until the operator wishes to remove the device from the
the spring ring 7 includes in addition to the ring 3 a ring 5
structure which carries the same, so that unauthorized 35 the details of which are illustrated in FIG. 4, and this
removal of the device by improper handling thereof or by
ring 5 is clamped to the support means by the screws 2
pulling on the same is prevented.
between the ring 3 and the housing 1. FIG. 4 illustrates
Still another object of the present invention is to pro
three openings spaced by 120° from each other in the
vide a connecting arrangement of the above type which
ring 5 through which the three screws 2 respectively pass.
requires no special tools to make the connection and dis 40 The annular bearing means 3, 5 is formed between the
connection and which only requires the parts to be moved
elements 3 and 5 with an annular space 6 which receives
with respect to each other for this purpose.
the outer peripheral portion of the spring ring 7 which is
An additional object of the present invention is to pro
shown most clearly in FIG. 2. The bearing means 3, 5
vide a structure of the above type which will be subject
supports the spring ring 7 for spreading expansion and for
to a relatively small amount of wear so that a long life
contraction in a plane normal to the axis of the device 4
of reliable operation is assured.
‘as well as for shifting movement in its entirety in the latter
With the above objects in view, the present invention in
plane, so that the position of the entire ring 7 in this
cludes a releasable connecting arrangement wherein a
plane can be changed. As is apparent from FIG. 2, the
device has a portion extending into an opening of a sup
spring ring 7 extends through almost a complete circle
port means. This device engages the support means and 50 and has a pair of ends 7a and 7b located closely adjacent
the portion of the device which extends into the opening
to each other.
of the support means is provided with an annular surface
The objective housing 4 is provided with an annular
which forms part of a cone. A spring ring is carried by
surface 4a coaxial with and axially spaced from the
the support means with its inner periphery in engagement
surface of the housing'4 which engages the annular sur
with the annular surface, and the support means supports
face 3a of the support means. This annular surface 4a
the spring ring for yieldable contraction ‘and expansion in
is directed toward the surface of the device 4 which en
a plane substantially normal to the axis of the annular
gages the surface 3a and forms part of a cone, as is evident
surface of the device, and this plane of the spring ring
from FIGS. 1 and 3. The inner periphery of the spring
makes with the annular surface of the device an angle in
ring 7‘ engages the surface 4a, and the spring ring 7 co- a plane which includes the ‘axis of the annular surface
operates with the surface 4a to hold the device 4 against
which is greater than zero but less than that angle at
the surface 3a of the support means, and in this way the
which the spring ring would spread upon pulling of the
position of the objective 4 is accurately determined, the
device from the support means.
location of the surface 3a of the support means being very
The novel features which are considered as character
precisely determined so that when the objective 4 engages
istic for the invention are set forth in particular in the 65 this surface the objective 4 is properly positioned on the
appended claims. The invention itself, however, both as
camera.
to its construction and its method of operation, together
In a plane which includes the axis of the surface 4w,
with additional objects and advantages thereof, will be
best understood from the following description of speci?c
such as the plane of FIG. 1, the plane in which the
spring ring 7 is 'yieldably contractible and expansible
embodiment when read in connection with the accompany 70 makes with the surface 4a an angle greater than zero but
ing drawings, in which:
less than the smallest angle at which the device 4, upon
FIG. 1 is 'an elevational view of an objective assembly
being pulled from the support means is capable of spread
3,070,389
3
ing the spring ring 7 by the engagement of the surface 4a
therewith. If the conical surface 4a is part of a cone
having a small angle at the apex, a great force component
will act on ring 7 in radial direction and will easily spread
the- ring 7 when the device 4- is pulled from the support
4
The circular spring ring 7 is so shaped that the greatest
part of its inner periphery engages the surface 4a, so that
the latter is protected against localized excessive wear.
Moreover, at the portions 7c of the ring 7 which are
respectively adjacent the ends 70 and 7b thereof, the ring
means. On the otherhand, if the surface 4a were located
in a plane normal to the axis of the objective 4 then the
7 is cut away at its inner periphery, so that the inner
self-locking angle depends upon the coefficient of friction
between the spring ring 7 and the frustoconical surface 4a,
surface 4a.
periphery of the ring 7 has the solid line rather than the
dotted line configuration indicated in FIG. 2, and at these
greatest pulling force will not result in spreading of the
places 70 the pressure of the ring 7 against the surface 4a
ring 7 since no radial force would act on ring 7. Be
tween these two extremes there is a self-locking angle 10 is the strongest when the spreader means 9 is moved in
wardly toward the axis of the ring. If the portion 7c
within which friction prevents relative sliding of the engag
were not cut away then there would be concentrated
ing surfaces so that the surface 4a will not spread the ring
localized wear on the surface 4a due to the concentration
7 when the device 4 is pulled away from the support
of the pressure of the ends of the ring 7 on the surface 4a
means 1, 3. The angle of the surface- 4a is between zero
and this self-locking angle so that the spring ring 7 and 15 when the spreader means 9 is manually operated to
release the device 4. The con?guration of the inner pe- \
the surface 4a are self-locking and the device 4 cannot
riphery of the ring 7 which is illustrated in FIG. 2 pre
be pulled from the support means 1, 3 because the angle
vents
such localized wear on the surface 4a. >With this
of the surface 4a is such that the radial component of an
configuration the pressure from the spreader means 9 is
axial pulling force applied to the device 4 is too small
to ‘spread the ring 7 in the plane of the ring 7. This 20 laterally distributed along a substantial portion of the
The objective housing 4 is furthermore provided with
on the one hand, and the coe?icient of frictionbetween '
an annular surface 4b which forms part of a cone and
assembly 4 securely in its assembled position on .the ring
with the inner beveled periphery 71‘ of the ring 7 to spread
which is inclined oppositely to the surface 4a and located
the spring ring 7 and the surface 3b of the ring 3 on the
other hand, since the friction between ring 7 and sur 25 adjacent to the latter, as indicated in FIG. 1. The in
clination of the surface 4b is such that self-locking be
faces 3b must be overcome when ring 7 is spread, such
tween the surface 4b and the ring 7 cannot take place and
friction depending on the axial pulling force acting on
thus when the objective 4 is inserted into the opening‘of
device 4 and pressing ring 7 against surface 3b.
the support means 1, 3 the surface 4b will engage and
As long as the inclination of the surface 4a is less than
spread the ring 7 so that the latter snaps over the junc
this self-locking angle then self-lockingtakes place in the
tion between the surfaces 4a and 4b and engages the sur
manner shown in FIG. 1 and the objective 4 is held in its
face 4a to reliably hold the objective 4 in its assembled
assembled position not by the resilient force of the ring
condition.
7 but rather by'frictional engagement between ring 7 and
During movement of the objective into the camera the
surface -4a..> Thus, the spring ring 7 can have a relatively
lower
portion 4b of the double cone 4a, 4b cooperates
weakuspring force and nevertheless holds the objective 35
3 even when the'greatest pulling force is applied along .
the latter until it snaps over onto the conical surface por
tion 4a. At the beginning of this engagement of surface
4b with surface 7')‘ the arcuate portion 7a‘ still engages the
a direction pulling the same away from the supportimeans
ring 3 while the end portions 7a and 7b are spread apart
40
1, 3.
It is necessary to spread the spring ring 7 by a‘ spreader 1 from each other out of engagement with the wedge-shaped
free end of the spreader means 9. After the largest diam
meanst9 in order to remove the objective assembly 4
the axis of the objective assembly 4 to the assembly 4 in
eter of the double cone has moved through the ring 7 so
that the latter engages the surfaces 4a, this ring 7 due to
are:.formed with a common radial cutout 8 in which 45 its own resiliency closes itself upon the surface 4a during
further movement of the objective into the camera and
spreader means 9 is manually shiftable, and as is apparent
adapts itself to the diameter of the portion of surface 4a
from FIG. 2, spreader means 9 has a substantially Wedge
shaped .free end extendinginto the gap‘between the free . . by ring 7 when the objective is in its ?nal position shown .
in FIGS. 1 and 3. It is apparent that the ring 7 is resilient
ends 7a and 7b,of the spring ring 7. The ring 5 has an;
extension formed with anelongated cutout 5a (FIG. .4) 50 ly closing itself upon the surface 411 centers itself with re
spect to the surface 4a and shifts itself bodily away from
and located in the cutout 8, 'so that the ring 5 cannot
the notch 30 of the ring 3 in its own plane perpendicular
turn'about its axis with respect to the‘ support means 1..
to its own axis. The diameter of the surface 4a which
The spreader means 9 is provided with a downwardly ex
is engaged by the ring 7 in the ?nal position of the objective
tending tongue 91: struck from the material of the ‘plate
shown in FIGS. 1 and 3 is of such a size that in this posi
9 itself and extending into the elongated slot- 5a so that '
the tongue 9a cooperates with the slot 511, to guide the 55 tion the free ends 7a and 7b of the ring 7 are held by the
surface 4a spaced from the wedge-shape end of the
member .9 for shifting movement back . and forth along
member 9.
the cutout 8. The ends of the slot 5a limit the move
When the latter is manually moved toward the optical
ment of the spreader means 9. When thexlatter is in
axis to release the objective it ?rst engages the free ends
its..rest position, FIG. 2, with the objective removed from
thecamera, the ends 7a and 7b of the ring 7 engage the 60 7a and 7b of the ring 7, then bodily shifts the latter toward
the notch 30 until the edge portion 711 engages the ring 3,
spreader means 9 and the spring ring. 7 is under a pre—
and then during further inward movement of the spreader
determined prestress at this time.
means 9 the ring 7 is spread to an extent sutlicient to
in the position of the parts shown in FIG. 2 (after the
release the objective so that the latter can be removed
objective has been removed from the camera), the tongue
9a of the spreader means 9 engages the ring 5 at the outer 65 from the camera.
It is desirable to prevent the objective assembly 4 i
end of the slot ‘5a. As a result of the cooperation be
from being turned about its axis, and for this purpose the
tween the ends 70 and 7b of the spring ring 7 with the
from the'support means 1, 3.
The support means 1 and
the guiding and supporting ring. 3 of the support means
ring 5 is formed with an arcuate slot 5c (FIG. 4) which
wedge-shaped'free end of member 9, the spring ring 7 is
serves to provide the ring 5 with an inner peripheral por
bodily shifted away from the member 9 until the arcuate
Edge portion 7d of the ring 7 engages the ring 3 in the 70 tion 5d which is yieldable in a direction normal to the
mannershown in FIG. 2. The tongue 7e of the ring 7
plane of the ring 5 and which is provided with a radial
cooperates with the notch 3c formed in the ring 3 (FIG
extension 5b extending toward thecenter of the ring 5.
2) to prevent turning of the ring 7 about its axis while
When the objective assembly 4 is introduced'into the‘.
frwngthe ring 7 for bodily shifting movement in its
opening of the support means 1, 3 the rear end 40 of the
75
ownplane ‘which is normati to its axis.
5
3,070,389
objective assembly 4 engages the tongue 5b and urges the
same out of the plane of the ring 5. With the edge 40
engaging the extension 5b the assembly 4 is turned about
its axis until the extension 5b snaps into a notch 4d (FIG.
3) formed in the objective assembly 4 and extending from
the end 4c thereof, as indicated in FIG. 3. The yield
6
ring 14 toward the collars 11a, and of course it is also
possible to turn the ring 15 so that the bearing means 12,
13 moves in the opposite axial direction, and in this way
the axial position of the spring ring 7 is adusted. The
ring 15 is provided at its outer surface with a plurality of
axially extending grooves 15a, and a springy member 16
ability of the portion 5d of the ring 5 causes the extension
5b to snap into the notch 4d, and with the tongue 5b
is ?xed to the support means 1 and snaps into a desired
one of the grooves 15a so as to releasably maintain the
located in the notch 4d the objective assembly 4 can no
ring 15 in its adjusted annular position.
longer turn about its axis. This structure for preventing 10 With the embodiment of FIG. 5 the frustoconical sur
turning of the objective assembly 4 is desirable so as to
face 4a cooperates with the spring ring 7 the same way
guarantee that scales on the exterior of the objective as
sembly are properly positioned so as to be visible to the
as with the embodiment of FIGS. 1-4 so that the co
operation is such that a pull on the objective assembly 4
operator, and furthermore with this structure the objective
is incapable of causing the surface 4a to spread the ring 7.
assembly 4 cannot be removed from the housing 1, 3 by 15 On the other hand the surface 412 is capable of spreading
a combined rotary and pulling force.
the ring 7 when the objective assembly 4 is inserted into
FIG. 5 illustrates a further embodiment of a structure
the opening of the support means 1 so that in this way
according to the present invention. The release of the
it is very easy to assemble the aparatus. The spring ring
connection by means of a rotary pulling force is pre
7 of FIG. 5 is also provided with a pair of free ends
vented by this embodiment in advance. Also, with the 20 de?ning between themselves a gap into which a spreading
embodiment of FIG. 5 it is possible to adjust the axial
means 9 identical with that described above extends, so
position of the spring ring 7 with respect to the frusto~
that in this way it is impossible to release the connection
conical surface 4a so that the place of engagement be
between the devices 1 and 4.
tween the inner periphery of the spring ring 7 and the
FIG. 6 of the drawings shows an embodiment identical
surface 4a _is capable of being regulated.
25 with that of FIGS. 1—3 except that the plate 5 of FIG. 4
Referring to FIG. 5, it will be seen that the support
is omitted and the objective assembly 4 is not provided
means 1 carries three screw members 11 one of which is
illustrated in FIG. 5. The screw members 11 are spaced
with a notch 4d, so that it is possible to turn the ob
jective assembly 4 about its axis. However, in order to
from each other by 120° and are distributed about the
axis of the objective assembly 4». The screw members 11
extend parallel to the axis of the objective assembly 4
and because of their threaded connection with the support
prevent the self-locking action between the spring ring 7
respectively formed with conical recesses, and the objec
the top face of the ring 7, as viewed in FIG. 6, with a
shoulder 17a surrounding the ring 7 and inclined in sub
and the surface 4a from failing to operate to maintain
the objective assembly 4 in its assembled condition even
if a rotary pulling force is applied to the objective as
means 1 the screw members 11 are capable of being axially
sembly, the ring 17 which forms together with the housing
adjusted. At their ends which are directed toward the
1 a bearing means for the ring 7 in the embodiment of
objective assembly 4 the three screw members 11 are 35 FIG. 6 is provided at its inner surface which engages
tive assembly 4 is provided with three pins 4e ?xed to the
objective assembly 4 and extending therefrom respectively
stantially the same direction as the annular surface 4a.
toward the screw members 11, these pins 4e respectively
When a rotary pulling force is applied to the objective
having rounded ends extending into the conical recesses 40 assembly 4 of FIG. 6, it is possible that the ring 7 might
of the screw members 11, one of the pins 4e being shown
spread somewhat, but it will only spread until the outer
in FIG. 5 extending into the conical recesses of the screw
periphery thereof engages the shoulder 17a, and the added
members 11. By turning the screw members 11 with
friction produced by the cooperation of the shoulder 17a
respect to the support means 1 it is possible on the one
with the ring 7 will prevent the latter from spreading
hand to regulate the distance between the objective 4 and
45 further irrespective of the size of the rotary pulling force,
the ?lm plane in which the ?lm is located when an ex
posure is made and on the other hand it is possible to
adjust the direction in which the axis of the objective
assembly 4 extends.
The embodiment of FIG. 5 is also provided with a hear
ing means for the spring ring 7, and in this embodiment
the bearing means is made up of the pair of rings 12
and 13. The axial space between the coaxial rings 12 and
13 is determined by a plurality of tongues 12a struck from
the ring 12 and extending from and engaging the ring 13
so that the rings 12 and 13 de?ne between themselves an
annular space corresponding to the space '6 of FIGS.
1 and 3 and in which the outer peripheral portion of the
spring ring 7 is located. The rings 12 and 13 are respec
tively formed with three pairs of aligned openings 12b and
13a through which the pins 4e respectively extend into en
gagement with screw members 11. The three screw mem
bers 11 are provided with collars 11a, respectively, and a
so that in this way the security of the connection of the
embodiment of FIG. 6 is assured. The pressure of the
outer periphery of the ring 7 against the shoulder 17a
produces a self-locking action which prevents further
spreading of the ring 7. However, when the spreader
means Q, which is the same in the embodiment of FIG. 6
as that of FIG. 1, is manually operated to spread the ring
7, the shoulder 17a does not prevent spreading of the
ring 7 and it is thus possible to easily release the device
4 from the support means 1 with the spreader means 9.
The shoulder 17a does not prevent spreading of the ring 7
by the spreader means 9 because at this time the pressure
acts only in a radial direction.
Thus, it will be seen that with the above-described em
bodiments of the invention advantage is taken of the fact
that the angle of the surface 4a is in the self-locking range,
to provide a spring. ring 7 which does not rely upon its
?guration, the springy ring 14 engaging the collars 11a
spring force for holding the objective assembly 4 in its
assembled condition, and thus the spring force can be
quite small and the undesirable forces applied to the sur
face 4a by a spring ring which resiliently presses against
on the one hand and the ring 12 on the other hand so as
the same are avoided and thus the surface 4a will not
springy ring 14 is formed with openings into which the
screw members 11 respectively extend, and this ring 14
engages the collar 11a and is of a wavy, corrugated con
become undesirably deformed after a short period of time.
to resiliently urge the latter away from the collars 11a.
It will be understood that each of the elements de
An annular cap nut 15 is in threaded engagement with
70 scribed above, or two or more together, may also ?nd a
the support means 1 and has an inner periphery engaging
useful application in other types of releasable connecting
a cylindrical ?ange located at the periphery of the ring
arrangements differing from the types described above.
13, as indicated in FIG. 5, so that by turning the ring 15
While the invention has been illustrated and described
it is possible to move the bearing means 12, 13 together
as
embodied in releasable connecting arrangements for
with the spring ring 7 against the force of the springy 75 cameras
or the like, it is not intended to be limited to the
3,070,389
7
details shown, since various modi?cations and structural
changes may be made without departing in any way from
tne spirit of the present invention.
Without further analysis, the foregoing will so fully re
veal the gist of the present invention that others can by
applying current knowledge readily adapt it for various
applications without omitting features that, from the
8
said spring ring has a substantially circumferential engage
ment with said second annular surface and urges said ?rst
annular surface against said annular surface of said sup
port means and on the other hand said spring ring must
be expanded before the device can be moved outwardly
away from said support means.
3. A releasable connecting arrangement comprising, in
combination, a device having a portion extending from a
?rst annular surface which surrounds said portion at one
standpoint of prior art, fairly constitute essential char
acteristics of the generic or speci?c aspects of this invention
end thereof, and said portion of said device being pro
and, therefore, such adaptations should and are intended 10 vided with a second annular surface which forms part of
to be comprehended within the means and range of equiv
alence of the following claims.
a cone, which is spaced coaxially from said ?rst annular
surface, and which is directed toward said ?rst annular
What is claimed as new and desired to be secured by
surface; support means formed with an opening which
Letters Patent is:
receives said portion of said device and having an annular
15
1. A releasable connecting arrangement comprising, in
surface engaging said ?rst annular surface of said device
combination, a device having a portion extending from a
when the latter is assembled with said support means; and
?rst annular surface which surrounds said portion at one
a spring ring hoving an inner periphery engaging said
end thereof, and said portion of said device being pro
second annular surface of said portion of said device and
vided with a second annular surface which forms part
supported by said support meas for yieldable resilient
of a cone, which is spaced coaxially from said ?rst an 20 movement in a plane substantially normal to the common
nular surface, and which is directed toward said ?rst an
axis of said ?rst and second annular surfaces while being
nular surface; support means formed with an opening re
substantially prevented by said support means from mov
ceiving said portion of said device and having an annular
ing along said common axis, said spring ring being located
surface engaging said ?rst annular surface of said device
in a plane which makes with said second annular sur
25
when the latter is connected with said support means; and
face in a plane including said common axis of said ?rst
an annular spring ring surrounding and resiliently press
and second annular surfaces an angle greater than zero
ing at its inner periphery against said second annular
but less than that angle at which said spring ring could
surface of said device and being supported in said sup
be spread upon pulling of said device outwardly away
port means for movement in a plane normal to the axis
from
said support means, said spring ring having a pair
of said ?rst and second annular surfaces while being pre 30 of free ends located closely adjacent to each other and
vented from moving in a direction parallel to said axis,
being cut away at its inner periphery adjacent said free
said second annular surface forming with the plane of said
ends so that when pressure is applied to the ends of said
spring ring in a plane which includes the common axis of
spring ring for spreading the latter the pressure is not con
said ?rst and second annular surfaces such an angle as
centrated on said second annular surface at the region of
35
to obtain a self-locking engagement between said spring
said ends of said spring ring, whereby on the one hand said
ring and said second annular surface, said angle being
spring ring has a substantially circumferential engagement
greater than zero but smaller than the angle at which
self-locking ceases so that it is not possible to expand the
with said second annular surface and urges said ?rst
spring ring by pulling the device outwardly away from
port means and on the other hand said spring ring must
be expanded before the device can be moved outwardly
away from said support means.
said support means whereby on the one hand said spring
ring has a substantially circumferential engagement with
said second annular surface and urges said ?rst annular
surface against said annular surface of said support means
and on the other hand said spring ring must be expanded
before the device can be moved outwardly away from said
support means.
annular surface against said annular surface of said sup
4. A releasable connecting arrangement comprising, in
combination, a device having a portion extending from a
?rst annular surface which surrounds said portion at one
end thereof, and said portion of said device being provided
with a second annular surface which forms part of a, cone,
2. A releasable connecting arrangement comprising, in
which is spaced coaxially from said ?rst annular surface,
and which is directed toward said ?rst annular surface;
support means formed with an opening receiving said
50
end ‘thereof, and said portion of said device being pro
portion of said device and having an annular surface en
vided with a second annular surface which forms part
gaging said ?rst annular surface of said device when the
of a cone, which is spacd coaxially from said ?rst annular
latter is connected with said support means; and an an
nular spring ring surrounding and engaging at its inner
surface, and which is directed toward said ?rst annular
surface; support means formed with an opening receiving
periphery said second annular surface of said device and
said portion of said device and having an annular surface 55 being supported in said support means for movement in a
engaging said ?rst annular surface of said device when
plane normal to the axis of said ?rst and second annular
the latter is connected with said support means; an annular
surfaces while being prevented from moving in a direc
spring ring surrounding and resiliently pressing at its inner
tion parallel to said axis, said second annular surface
periphery against said second annular surface of said
forming with the plane of said spring ring in a plane which
device and being supported in said support means for
includes the common axis of said ?rst and second annular
combination, a device having a portion extending from
a ?rst annular surface which surrounds said portion at one
movement in a plane normal to the axis of said ?rst and
surfaces an angle which is gretater than zero but less than
second annular surfaces while being prevented from mov
that angle at which it is possible to expand the spring
ing in a direction parallel to said axis, said second annular
ring by pulling the device outwardly away from said sup
surface forming with the plane of said spring ring in a
port means, said support means having a surface directed
plane which includes the common axis of said ?rst and 65 away from said ?rst annular surface of said device and
second annular surfaces such an angle as to obtain a self
engaging one face of said spring ring, and said support
locking engagement between said spring ring and said sec
means having at its surface which engages said face of
ond annular surface, said angle being greater than zero
said spring ring an inclined annular shoulder surrounding
but smaller than the angle at which self-locking ceases so
said spring ring for preventing spreading thereof to an ex
that it is not possible to expand the spring ring by pulling 70 tent which permits the device to be removed from said
the device outwardly away from said support means; and
support means until a suitable spreading means is applied
manually operable spreading means carried by said sup
to said spring ring whereby on the one hand said spring
port means and cooperating with said spring ring for
ring has a substantially circumferential engagement with
spreading the latter to release said device for movement
said second annular surface and urges said first annular
away from said support means whereby on the one hand
3,070,389
surface against said annular surface of said support means
and on the other hand said spring ring must be expanded
before the device can be moved outwardly away from said
support means.
5. A releasable connecting arrangement comprising, in
combination, a device having a portion extending from a
?rst annular surface which surrounds said portion at one
19
opening of said support means and supporting said spring
ring for yieldable spreading and contracting movement
in a plane normal to the axis of said annular surface,
said plane and said annular surface forming, with each
other in a plane including said axis of said annular sur
face such an angle as to obtain a self-locking engagement
between said ring and said annular surface, said angle
being less than that angle at which the device upon being
vided with a second annular surface which forms part of
pulled from said support means will produce spreading
a cone, which is spaced coaxially from said ?rst annular 10 of said spring ring by cooperation of said annular surface
surface, and which is directed toward said ?rst annular
therewith.
.
surface; support means formed with an opening receiving
8. The combination comprising, in combination, a de
said portion of said device and having an annular surface
vice having a portion extending from a ?rst annular sur
engaging said ?rst annular surface of said device when
face which surrounds said portion at one end thereof, and
the latter is connected with said support means; an an 15 said portion of said device being provided with a second
nular spring ring surrounding and engaging at its inner
annular surface which forms part of a cone, which is
periphery said second annular surface of said device and
spaced coaxially ‘from said ?rst annular surface, and
end thereof, and said portion of said device being pro
being supported in said support means ‘for movement in a
which is directed toward said ?rst annular surface; sup
plane normal to the axis of said ?rst and second annular
port means formed with an opening receiving said portion
surfaces while being prevented from moving in a direc 20 of said device and having an annular surface engaging
tion parallel to said axis, said second annular surface
said ?rst annular surface of said device when the latter
forming with the plane of said spring ring in a plane
is connected with said support ‘means; and an annular
' which includes the common axis ‘of said ?rst and second
spring ring surrounding and resiliently pressing at its inner
annular surfaces an angle which is greater than zero but
periphery against said second annular surface of said de
less than that angle at which it is possible to expand the 25 vice and being supported in said support means for move
spring ring by pulling the device outwardly away from
ment in a plane normal to the axis of said ?rst and second
said support means; ‘and means cooperating with said sup
annular surfaces while being prevented from moving in
port means and said device for preventing relative rota
a direction parallel to said axis, whereby said spring ring
tion between said support means and said device about the
has a substantially circumferential engagement with said
common axis of said annular surfaces of said portion of 30 second annular surface and urges said ?rst annular sur
said device whereby on the one hand said spring ring has
face against said annular surface of said support means.
a substantially circumferential engagement with said sec
9. A releasable connecting arrangement comprising, in
ond annular surface and urges said ?rst annular surface
combination, a device having a portion extending from a
against said annular surface of said support means and
?rst annular surface which surrounds said portion at one
on the other hand said spring ring must be expanded be 35 end thereof, ‘and said portion of said device being pro
fore the device can be moved outwardly away from said
vided with a second annular surface which forms part of
support means.
a cone, which is spaced coaxially from said ?rst annular
6. A releasable connecting arrangement comprising, in
surface, and which is directed toward said ?rst annular
combination, a device having a portion extending from a
surface; support means formed with an opening receiving
?rst annular surface which surrounds said portion at one 40 said portion of said device and having an annular surface
end thereof, and said portion of said device being pro
engaging said ?rst annular surface of said device when
vided with a second annular surface which forms part of
the latter is connected with said support means; an an
a cone, which is spaced coaxially from said ?rst annular
nular spring ring surrounding and resiliently pressing at
surface, and which is directed toward said ?rst annular
its inner periphery against said second annular surface of
surface; support means formed with an opening receiving 45 said device and being supported in said support means for
said portion of said device; an annular spring ring sur
movement in a plane normal to the axis of said ?rst and
rounding and engaging at its inner periphery said second
annular surface of said device and being supported in said
support means for movement in a plane normal to the
second annular surfaces while ‘being prevented from
moving in a direction parallel to said axis; and manually
operable spreading means carried by said support means
axis of said ?rst and second annular surfaces while being 50 and cooperating with said spring ring for spreading the
prevented from moving in a direction parallel to said axis,
latter to release said device for movement away from said
said second annular surface forming with the plane of said
support means, whereby said spring ring has a substan
spring ring in a plane which includes the common axis
tially circumferential engagement with said second an
of said ?rst and second annular surfaces an angle which
nular surface and urges said ?rst annular surface against
is greater than Zero but less than that angle at which it is 55 said annular surface of said support means.
possible to expand the spring ring by pulling the device
outwardly away from said support means; and adjusting
means for adjusting the position of said spring ring along
10. A releasable connecting arrangement comprising,
in combination, a device having a portion extending from
a ?rst annular surface which surrounds said portion at one
said common axis of said ?rst and second annular surfaces
end thereof, and said portion of said device being pro
so that the place where said spring ring engages said sec 60 vided with a second annular surface which forms part of
ond annular surface may be adjusted whereby on the one
a cone, which is spaced coaxially from said ?rst annular
hand said spring ring has a substantially circumferential
surface, and which is directed toward said ?rst annular
engagement with said second annular surface and urges
surface; support means formed with an opening which re
said ?rst annular surface against said annular surface of
ceives said portion of said device and having an annular
said support means and on the other hand said spring ring 65 surface engaging said ?rst annular surface of said device
must be expanded before the device can be moved out
when the latter is assembled with said support means; and
wardly away from said support means.
a spring ring having an inner periphery engaging said
7. A releasable connecting arrangement comprising, in
second annular surface of said portion of said device and
combination, support means formed with an opening; a
‘ supported by said support means for yieldable resilient
device engaging said support means and having a portion 70 movement in a plane substantially normal tothe com
extending into said opening thereof and provided with an .
annular surface forming part of a cone and directed to
mon axis of said ?rst and second annular surfaces while
being substantially prevented by said support means from
ward the exterior of said support means; a spring ring
moving along said common axis, said spring ring having
engaging at its inner periphery said annular surface of
a pair of free ends located closely adjacent to each other
said portion of said device; bearing means located in said 75 and being cut away at its inner periphery adjacent said
3,070,389
11
free ends so that when pressure is applied to the ends of
said spring means for spreading the latter the pressure is
not concentrated on said second annular surface at the
region of said spring ring, whereby said spring ring has a
substantially circumferential engagement with said second
annular surface and urges said ?rst annular surface against
said annular surface of said support means.
11. A releasable connecting arrangement comprising,
12
spring ring surrounding and engaging at its inner pe
riphery said second annular surface of said device and
being supported in said support means for movement in a
plane normal to the axis of said ?rst and second annular
surfaces while being prevented from moving in a direc
tion parallel to said axis; and means cooperating with said
support means and said device for preventing relative ro
tation between said support means and said device about
the common axis of said annular surfaces of said portion
in combination, a device having a portion extending from
of said device, whereby said spring ring has a substantially
a ?rst annular surface which surrounds said portion at 10
circumferential engagement with said second annular
one end thereof, and said portion of said device being
surface and urges said ?rst annular surface against said
provided with a second annular surface which forms part
annular
surface of said support means.
of a cone, which is spaced coaxially from said ?rst an
13. A releasable connecting arrangement, comprising,
nular surface, and which is directed toward said ?rst an
in combination, a device having a portion extending from
nular surface; support means formed with an opening 15 a ?rst annular surface which surrounds said portion at one
receiving said portion of said device and having an an
end thereof, and said portion of said device being pro
nular surface engaging said ?rst annular surface of said
vided with a second annular surface which forms part of
device when the latter is connected with said support
a cone, which is spaced coaxially from said ?rst annular
means; andan annular spring ring surrounding and en
gaging at its inner periphery said annular surface of said 20 surface, and which is. directed toward said ?rst annular
‘surface; support means formed with an opening receiv
device and being supported in said support means for
ing said portion of said device; an annular spring ring
movement in a plane normal to the axis of said ?rst and
surrounding‘ and engaging at its inner periphery said sec
second annular surfaces while being prevented from mov
ond annular surface of said device and being supported
ing in a direction parallel to said axis, said support means
in vsaid support means for movement‘ in a plane normal
25
having a surface directed away from said ?rst annular
‘to
the axis of said ?rst and second annular surfaces while
surface of said device and engaging one edge of said
being prevented from moving in a direction parallel to
spring ring, and said support means having at its surface
said axis; and adjusting means for adjusting the position
which engages said face of said spring ring and inclined
of said spring ring along said common axis of said ?rst
annularshoulder surrounding said spring ring for pre
second annular surfaces so that place where said
venting spreading thereof to an extent which permits the 30 and
spring ring engages said second annular surface may be
device to be removed from said support means until a
adjusted, whereby said spring ring has a substantially cir
suitable spreading means is applied to said spring ring,
cumferential engagement with said second annular sur
whereby said spring ring has a substantially circumferen
face and urges said ?rst annular surface against said an
tial engagement with said second annular surface and
nular surface of said support means.
35
urges said ?rst annular surface against said ?rst annular
surface of said support means.
References Eited in the ?le of this patent
12. The combination comprising, in combination, a de
UNITED STATES PATENTS
vice having a portion extending from a ?rst annular sur
face which surrounds said portion at one end thereof, and
658,911
Hall __________________ __ Oct. 2, 1900
said portion of said device being provided with a second 40 1,407,570
Peirce ______________ __ Feb. 21, 1922
annular surface which ‘forms part of a cone, which is
spaced coaxially from said ?rst annular surface, and
which is directed toward said ?rst annular surface; sup
port means formed with an opening receiving said por
tion of said device and having an annular surface engag 45
ing said ?rst annular surface of said device when the latter
is connected with said support means; and an annular
2,363,436
2,793,869
Pancoe ______________ __ Nov. 21, 1944
Braun ______________ __ May 28, 1957
2,895,754
Wuzel ______________ __ July 21, 1959
350,027
Germany ____________ __ Mar. 11, 1922
597,385
Germany ____________ __ May 25, 1934
FOREIGN PATENTS
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