U.S. patent number 3,665,565 [Application Number 05/068,418] was granted by the patent office on 1972-05-30 for clasp for bracelets and the like.
Invention is credited to Stanley Kruger.
United States Patent |
3,665,565 |
Kruger |
May 30, 1972 |
CLASP FOR BRACELETS AND THE LIKE
Abstract
A clasp for securing together two objects, such as the two ends
of a bracelet, comprises a housing and a connecting element adapted
to be slid into the housing. The housing carries a catch which
engages with the connecting element to retain the latter in the
housing. The act of releasing the catch cams the connecting element
outwardly from its connected position, the connecting element
nevertheless being frictionally retained within the housing, from
which it can be separated by a subsequent and separate action.
Inventors: |
Kruger; Stanley (Bayside,
NY) |
Family
ID: |
22082452 |
Appl.
No.: |
05/068,418 |
Filed: |
August 31, 1970 |
Current U.S.
Class: |
24/265WS;
D11/94 |
Current CPC
Class: |
A44C
5/2042 (20130101); A44B 11/25 (20130101); Y10T
24/4782 (20150115) |
Current International
Class: |
A44C
5/20 (20060101); A44B 11/25 (20060101); A44C
5/18 (20060101); A44c 005/18 () |
Field of
Search: |
;24/265T,23AP,241WB,241S |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1,039,635 |
|
Aug 1966 |
|
GB |
|
443,755 |
|
Feb 1967 |
|
CH |
|
Primary Examiner: Gilliam; Paul R.
Claims
I claim:
1. A clasp for releasably securing together two objects comprising
a housing adapted to be secured to one of said objects and open at
an end, a connecting element adapted to be secured to the other of
said objects, said connecting element being movable into said
housing via said open end thereof to a first position, a catch
mounted on said housing and movable between locking and releasing
positions, said catch and said element having cooperating parts
which engage when said catch is in said locking position and said
element is in said first position, thereby to retain said element
in said first position in said housing, and which disengage when
said catch is in said releasing position, thereby to release said
element for movement out from said housing, and a member
operatively connected to said catch, movable therewith in a
direction having a component away from said one end of said
housing, and engageable with said connecting element as it thus
moves, thereby to cam said connecting element outwardly of said
first position to a second position when said catch moves from
locking to releasing position.
2. The clasp of claim 1, in which said catch is mounted on said
housing to pivot about an axis near said open end of said housing,
said catch extending from said axis in a direction away from said
open housing end, and said member is located on the side of said
axis toward said open housing end.
3. The clasp of claim 1, in which said parts on said catch and
element engage only when said element is in said first position,
said parts not engaging when said element is in said second
position.
4. In the clasp of claim 3, cooperating detent means on said
housing and said connecting element engageable when said element is
in said second position.
5. In the clasp of claim 1, cooperating detent means on said
housing and said connecting element.
6. In the clasp of claim 1, cooperating detent means on said
housing and said connecting element engageable when said element is
in said second position.
7. The clasp of claim 1, in which said housing has a surface
extending in a general direction from one housing end toward the
other, said connecting element engaging and sliding over said
surface as it is moved into said housing, and means on said housing
engaging said connecting element and effective to urge it against
said surface, thereby to inhibit escape of said connecting element
from said housing.
8. In the clasp of claim 7, a shaft in said housing on which said
catch is pivotably mounted, said shaft being located opposite said
housing surface, said connecting element being located in said
housing between said shaft and said surface, said shaft having a
part operatively engaging said connecting element and urging it
toward said surface, thereby to comprise said urging means.
9. In the clasp of claim 7, spring means operatively connected to
said catch and effective to urge said catch to one of its said
positions, said spring being located opposite said housing surface,
said connecting element being located in said housing between said
spring means and said surface, said spring means engaging said
connecting element and urging it toward said surface, thereby to
comprise said urging means.
10. The clasp of claim 1, in which said cooperating parts on said
catch and said connecting element comprise surfaces which meet
along a line inclined relative to the direction of insertion of
said connecting element into said housing.
11. The clasp of claim 1, in which said cooperating parts on said
catch and said connecting element comprise surfaces which meet
along a line inclined relative to the direction of insertion of
said connecting element into said housing in such a direction as to
tend to cam said connecting element so that other portions of said
cooperating parts move into engagement with one another.
12. A clasp for releasably securing together two objects comprising
a housing adapted to be secured to one of said objects and open at
an end, a connecting element adapted to be secured to the other of
said objects, said housing having a surface extending in a general
direction from one housing end toward the other, said connecting
element being movable into said housing via said open end thereof
and engaging and sliding over said surface as it is moved into said
housing to a first position, a catch mounted on said housing
opposite said surface and movable toward and away from said surface
between locking and releasing positions respectively, said catch
and said element having cooperating parts which engage when said
catch is in said locking position and said element is in said first
position, thereby to retain said element in said first position in
said housing, and which disengage when said catch is in said
releasing position, thereby to release said element for removal
from said housing, and means in said housing other than said catch
located between said housing and said catch and on the opposite
side of said element from said surface engaging said element and
effective to urge it against said surface, thereby to inhibit
escape of said element from said housing.
13. In the clasp of claim 12, a shaft in said housing on which said
catch is pivotably mounted, said shaft being located opposite said
housing surface, said connecting element being located in said
housing between said shaft and said surface, said shaft having a
part operatively engaging said connecting element and urging it
toward said surface, thereby to comprise said urging means.
14. The clasp of claim 13, in which said shaft carries spring means
operatively connected to said catch and effective to urge said
catch to one of its said positions.
15. In the clasp of claim 12, spring means operatively connected to
said catch and effective to urge said catch to one of its said
positions, said spring being located opposite said housing surface,
said connecting element being located in said housing between said
spring means and said surface, said spring means engaging said
connecting element and urging it toward said surface, thereby to
comprise said urging means.
Description
The present invention relates to the construction of a clasp for
releasably securing together two objects, such as the ends of a
bracelet.
Clasps of the type in question, particularly when they are used in
connection with valuable objects, such as gemmed bracelets and
expensive watches, must be extremely reliable in operation. When
the clasp is engaged the two objects with which it cooperates
(hereinafter, being termed "bracelet ends," because the clasp is
exceptionally well adapted to secure together the ends of a
bracelet) must be reliably connected together. If that is not the
case and if for some reason the two bracelet ends should become
separated accidentally, the bracelet will fall from the wrist of
the wearer. If, as it happens all too often, this occurs when the
attention of the wearer is otherwise directed the bracelet
(together with the watch if it is a watch-bracelet which is being
worn) will be lost.
Many clasps function very reliably if not disturbed. However, when
a bracelet is worn it is subject to many disturbances. It may be
jarred if the wearer's arm hits against a wall or a desk. The
movable catch element on the clasp may be engaged and moved as the
wearer's arm swings against his body, is drawn out from a pocket of
his clothes, or slides across a chair cushion, for example. The
clasp must be so designed as to guard against all of these
effects.
Another problem involved in the functioning of clasps, particularly
for jewelry items such as bracelets, is that the wearer must find
it easy to determine when the clasp is properly engaged. If that is
not the case the wearer may think that his piece of jewelry is
properly secured, whereas in fact it may not be. The consequences
may be serious.
Another requirement for clasps of the type under discussion is that
they can be easily engaged and disengaged, preferably by one-hand
operation. This is particularly important in connection with
jewelry items worn on the arm or wrist, since then only one of the
wearer's hands is available for manipulation of the clasp. A
particular problem in this category arises when the clasp is being
disengaged. When the only available hand of the wearer is
manipulating the catch part of the clasp to disengaging position,
and if that manipulation succeeds in disengaging the two parts of
the clasp, the premature separation of these two parts may result
in damage or injury to the item of jewelry associated with the
clasp. For example, if the two parts of the clasp separate too
readily while the only available hand of the user is actuating the
catch the jewelry item may slip from the wrist of the wearer and
from his grasp and fall to the ground.
It is a prime object of the present invention to devise a clasp
structure which avoids all of the above disadvantages.
More particularly, it is an object of the present invention to
devise a clasp which lends itself to attractive design so that it
may be utilized with artistic items in jewelry, which may be
manufactured relatively inexpensively and without requiring any
great degree of precision, and which at the same time will produce
a clasp structure which is easily locked and unlocked which will
readily apprise the user of its locked or unlocked status, and
which when unlocked will nevertheless tend to remain engaged,
requiring for effective disengagement a subsequent separate
operation, thereby making most remote the possibility of damage to
the item of jewelry during disengagement.
To these ends, the clasp comprises a housing defining one clasp
part, that housing having an open end through which a connecting
element defining the other clasp part is adapted to be slid to
locking position. A catch is mounted on the housing and is movable
between locking and releasing positions. The catch and the
connecting element are provided with cooperating parts, such as a
projection on the catch and a recess on the connecting element,
which engage only when the connecting element is in its fully
inserted position and the catch is in its locking position. If the
connecting element is not in its fully inserted position the catch
will not be able to move to its locking position, this will be
obvious to the user, and thus the user will know that the clasp is
not properly engaged.
When the clasp is properly engaged, when the cooperating parts on
the catch and the connecting element operatively cooperate with one
another to lock the connecting element in the housing, that
connecting element will have a section located outside and adjacent
to the housing, and the catch will have a member operatively
connected thereto which, when the catch moves from its locking to
its releasing position, engages the aforesaid section of the
connecting element and moves it away from the housing, thereby
partially withdrawing the connecting element from the housing. When
the catch is then released it cannot return to its locking
position, being prevented by the connecting element in its then
position, and hence the user will be apprised of the fact that the
clasp is not locked. At the same time, in order to prevent
pre-mature separation of the two clasp parts, that portion of the
connecting element remaining within the housing is frictionally
engaged, as by a spring which urges it against an appropriately
oriented housing surface. Thus the clasp parts will remain together
and the bracelet will not fall from the wearer's wrist. Thereafter
the user need merely pull the connecting element out from the
housing against the frictional resistance after he has firmly
grasped that connecting part and the bracelet end to which it is
secured. The frictional action on the connecting element retaining
it within the housing may be supplemented by a detent action when
desired.
To the accomplishment of the above and to such other objects as may
hereinafter appear, the present invention relates to the
construction of a clasp as defined in the appended claims and as
described in this specification, taken together with the
accompanying drawings, in which:
FIG. 1 is a three-quarter perspective view of a preferred
embodiment of the present invention showing the clasp in locked
condition with the catch in locking position;
FIG. 2 is a view similar to FIG. 1, but partially broken away,
showing the housing and connecting element separated from one
another and the catch on the housing in its releasing position;
FIG. 3 is a cross-sectional view on a reduced scale taken along the
line 3--3 of FIG. 1;
FIG. 4 is a view similar to FIG. 3 but showing the catch in its
releasing position and camming the connecting element partially out
from the housing;
FIG. 5 is a cross-sectional view taken along the line 5--5 of FIG.
3;
FIG. 6 is a cross-sectional view of another embodiment of the
present invention taken along a line extending longitudinally of
the clasp substantially midway of its width; and
FIG. 7 is a three-quarter perspective view showing the clasp of
FIG. 6 with the housing and connecting element separated and with
the catch in its releasing position.
The clasp as here disclosed, for purposes of illustration, secures
together the two ends of a bracelet or strap such as might be used
to encircle the wrist of a person and to carry a wrist watch and/or
ornamentation, but it will be understood that this is by way of
exemplification only, and that the clasp can be used for connecting
together any two objects.
The clasp comprises two main parts, a housing generally designated
2 and a connecting element generally designated 4, those two parts
being adapted to be releasably locked together and separated. The
housing 2 is adapted to be secured to an object, such as the
bracelet end 6, and the connecting element 4 is adapted to be
secured to another object, such as the other end 8 of a bracelet.
The connecting element is adapted to be inserted into and removed
from the housing 2, that housing carrying a catch 10 which is
movable between locking and releasing positions shown respectively
in FIGS. 1 and 2. When the catch 10 is in its locking position and
when the connecting element 4 is fully inserted into the housing 2,
the catch 10 engages with the connecting element 4 and locks it in
position. When the catch 10 is in its releasing position it is
disengaged from the connecting element 4, thus permitting the
latter to be removed from the housing 2. Also located in the
housing is a member 12 which is adapted to engage the connecting
element 4 when it is inserted in the housing and to cause that
element to be frictionally retained within the housing, thereby
inhibiting separation of the connecting element 4 from the housing
2 even when the clasp is unlocked but permitting that separation to
be accomplished through an appropriate affirmative action on the
part of the user. The catch 10 is provided with a member 14 which,
as the catch 10 is moved from its locking position shown in FIG. 1
to its releasing position shown in FIGS. 2 and 4, engages the
connecting element 4 and cams it outwardly to a position still
substantially within the housing 2 but sufficiently removed from
its locking position so that the catch 10 can no longer lockingly
engage therewith. Release of the catch 10 after it has thus cammed
the connecting element 4 to its position shown in FIGS. 2 and 4
then results in interference between the catch 10 and the
connecting element 4, preventing the former from attaining its
locking position. This will have two effects: first, the position
which the catch 10 assumes will alert the user to the fact that the
clasp is not locked, so that he can take appropriate action if
desired or appropriate, and second, the fact that the connecting
element is not locked in position will permit the user to withdraw
it from the housing 2 provided that it is pulled with sufficient
force to overcome the frictional resistance to movement caused by
the part 12.
The housing 2 comprises a bottom wall 15, side walls 16, and a rear
wall 18. It is open at its front end 20 and at its top 22. Secured
to the rear wall 18 is a shell part 24 within which a portion of
the object 6 is adapted to be received and secured, as by means of
the pin 26 passing through the loop 28 formed in the bracelet end
6.
The catch 10 comprises a top wall 30 and depending side walls 32
the ends 34 of which are enlarged vertically and are provided with
front edges 36, bottom edges 38 and inclined rear edges 40. A pin
42 extends between the side walls 16 adjacent but somewhat inwardly
spaced from the open housing end 20, and the catch 10 is pivotably
mounted on that pin 42, the pin passing through appropriately
positioned apertures in the side walls 32 of the catch 10. A
portion of the catch 10 extends forwardly to the right) beyond the
pin 42, as may best be seen from FIGS. 3 and 4, that portion being
integral with the catch 10 and constituting the part 14. The catch
10 is movable between a locking position shown in FIGS. 1 and 3, in
which its top wall 30 is received between the side wall 16 of the
housing, and a releasing position shown in FIGS. 2 and 4 in which
the top wall 30 extends up from the housing side walls 16, as shown
in FIGS. 2 and 4. Means are provided resiliently urging the catch
10 to its locking position, that means being here shown as a spring
44 coiled about the pin 42, having one arm 46 extending forwardly
to and anchored in the wall 18 and having another arm 48 engaging
the inner surface of the catch 10 to the right of the pin 42, as
viewed in the figures, thereby urging the catch 10 to pivot in a
counterclockwise direction as viewed in the figures.
The connecting element 4 comprises a shell-like part 47 to which an
end of the object 8 is adapted to be secured in any appropriate
manner, as by means of the pin 49 passing through the loop 50
formed in the bracelet end 8. Extending forwardly from the shell
part 46 is a plate-like section 52 provided with recesses 54
located at its sides and close to its leading end, with inclined
surfaces 56 extending from the upper surface of the section 52
downwardly toward the recesses 54. The inclination of the surfaces
56 may be comparable to the inclination of the surfaces 40 on the
catch 10, and the location of the recesses 54 on the connecting
element 4 will be such as to register with and lockingly receive
the enlarged side wall portions 34 of the catch 10 when the
connecting element section 52 has been inserted into the housing 2
via the open end 20 thereof a proper distance and when the catch 10
is permitted to move to its locking position. This is illustrated
in FIG. 3, where it will be noted that the engagement between the
inclined surfaces 40 and 56 on the catch 10 and connecting element
4 respectively will tend to cam the connecting element 4 outwardly
(to the right as viewed in the figures) so as to bring the forward
end of the recesses 54 into engagement with the surfaces 36 of the
catch parts 34, thus taking up play in the clasp when it is
locked.
When the connecting element 4 is in its fully inserted position, in
which its recesses 54 register with the catch parts 34, the shell
portion 47 of the connecting element 4 constitutes a section
thereof which is located outside but close to the housing 2. As may
be seen from a comparison of FIGS. 3 and 4, lifting of the catch 10
from its locking position to its releasing position, by causing it
to pivot in a direction of the arrow 58, will cause that portion 14
of the catch 10 located to the right of the pin 42 to engage and
push that section 47 of the connecting element 4, thereby camming
the connecting element 4 somewhat outwardly from the housing 2.
Upon subsequent release of the catch 10 the spring 44 will pivot
the catch 10 in a counterclockwise direction back toward its
locking position, but because the connecting element 4 has been
thus cammed outwardly the catch parts 34 will no longer register
with the connecting element recesses 54. Instead, those catch parts
will engage the upper surfaces of the leading portion of the
connecting element 4. The catch 10 will thus be retained in an
elevated position, not flush with or received within the housing 2
(as it is in its locking position illustrated in FIG. 1) but
projecting somewhat above the housing 2. This will give immediate
warning or notice to the user that the catch is not locked, and
permit him to take such action as is appropriate.
As may best be seen from FIG. 5, the pin 42 is curved downwardly
between the side wall 16 so that it (or, as here specifically
disclosed, the spring 44 carried by it) will be relatively closely
spaced with respect to the upper surface of the bottom wall 14 of
the housing 2. The connecting element section 52, when it enters
the housing 2 via the open end 20 thereof, slides between the pin
42 and the bottom wall 15 and is engaged and pressed by the pin 42
into firm frictional engagement with the bottom wall 15. The
pressure of the pin 42 on the connecting element section 52 (which
preferably is a resilient pressure, deriving from the resiliency of
the pin 42, for example) provides a supplemental clasp action which
retains the connecting element section 52 within the housing 2
frictionally even though the locking action of the catch 10 is no
longer effective. This will prevent the connecting element 4 from
falling out from the housing 2, but it will not prevent it from
being pulled out therefrom. This is an important functional
feature.
In use, when the clasp parts are to be connected the connecting
element section 52 is slid into the housing 2 via the open end 20
thereof. Its leading edge will engage the inclined surfaces 40 on
the catch 10 and cam the catch upwardly against the action of the
spring 44. When the connecting element 4 is fully inserted into the
housing 2 the catch parts 34 will register with and snap into the
connecting element recesses 54, thereby locking the connecting
element 4 within the housing 2, and the cooperative action of
inclined surfaces 40 and 56 will cause the front ends of the
recesses 54 to engage the front surfaces 36 of the catch parts 34,
thus taking up any looseness or play in the catch without requiring
the parts to be highly dimensionally precise.
When the clasp is to be disengaged the catch 10 is lifted to its
releasing position, as shown in FIGS. 2 and 4. When this is done
engagement between the part 14 and the connecting element section
47 cams the connecting element 4 slightly outwardly from its locked
position, that movement being permitted by withdrawal of the catch
parts 34 from the connecting element recesses 54. When the catch 10
is released it cannot move back all the way to its catching
position but will remain projecting somewhat upwardly from the
housing 2, thus apprising the user that the catch is not locked.
However, the resilient clasping action of the pin 42 retains the
connecting element 4 within the housing 2, although in an unlocked
position. This will retain the bracelet on the wrist of the wearer
while he shifts his grasp from the catch 10, which can only be
grasped by a fingernail, to the section 46 of the connecting
element 4, which can be firmly grasped by the user's fingers.
Thereafter the user pulls the connecting element 4 from the housing
2, but because he now has a firm grasp on the connecting element
section 46, the bracelet will not fall.
The embodiment of FIGS. 6 and 7 is similar to that of FIGS. 1-5,
and similar parts are identified by similar reference numbers. The
embodiment of FIGS. 6 and 7 differs from that of the earlier
embodiment in the manner in which the connecting element 4 is
retained within the housing 2 after it has been unlocked and cammed
outwardly from its locking position. In the embodiment of FIGS. 6
and 7 the pin 42' on which the catch 10 is pivotably mounted is
straight rather than being bent downwardly, and the connecting
element section 52, as it slides over the bottom wall 15 of the
housing 2, has a clearance between itself and the pin 42'. A spring
44 is mounted on the pin 42' and, as in the earlier described
embodiment, acts on the catch 10 to bias it toward its catching
position. In the embodiment of FIGS. 6 and 7, however the spring
arm 46' which is anchored in the end wall 18 of the housing 2 is
itself bent downwardly so as to engage the upper surface of the
connecting element section 52 when the latter is inserted into the
housing 2, thereby to urge the latter down against the housing wall
15. The spring arm 46' may be provided with an integral protrusion
46A to engage the upper surface of the connecting element section
52. Additionally, if desired, a recess 46B may be formed in the
upper surface of the connecting element section 52 at a position
such as to register with the spring arm projection 46A, and to
receive the latter therewithin, when the connecting element 4 has
been cammed outwardly by the catch part 14. This engagement will
produce a detent action which will more reliably retain the
connecting element 4 within the housing 2 even though it is
unlocked but which will yield to a firm pull exerted on the
connecting element 4. In addition, the movement of the protrusion
46A into the recess 46B may assist in camming the connecting
element 4 outwardly to its frictionally held but unlocked
position.
While the spring active on the connecting element 4 is here shown
as part of the spring 44 which also biases the catch 10 (FIGS. 6
and 7) or as part of the pin 42 on which the catch 10 is pivotably
mounted (FIGS. 1-5), that is not essential. A separate spring could
be provided for this purpose, e.g. a leaf spring arm mounted on and
extending to the right from the front housing wall 18.
It will be apparent from the above that the catch of the present
invention may be formed of simple and sturdy parts, that the parts
are so designed as to cooperate and to minimize looseness or play
even though they are not made to any high degree of dimensional
precision, that the construction lends itself to incorporation into
attractive ornamental designs suitable for use with expensive and
artistic pieces of jewelry, and that the parts may be readily
assembled. Moreover, the locking action is firm and positive, the
manipulation of the clasp for unlocking is simple, the movement of
the catch to its unlocking position positively insures that the
connecting element moves out of its locked position, but the
connecting element is nevertheless temporarily retained in the
housing until the user can shift his grasp and thus be ready for
separation of the clasp parts without endangering the objects to
which those parts are connected.
While but a limited number of embodiments of the present invention
have been here specifically disclosed, it will be apparent that
many variations may be made therein, all within the scope of the
invention as defined in the following claims.
* * * * *