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Патент USA US3084514

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April 9, 1963
3,084,503
W. WOLF
EXPANSIBLE LINK BRACELET WITH LINK DETACHING MEANS
Filed Dec. 6, 1961
40
11
10
'41
10
WillsINVENTOR.
\OoLf
?ttornes
"is
3,084,503
Patented‘ Apr. 9, 1963
2
ing additional difficulty has to be considered. Although
it is relatively simple to devise suitable shortening means
3,084,503
EXPANSHBLE LINK BRACELET WITH LINK
DETACHING MEANS
Willy Wolf, Pforzheim, Germany, assignor to Rodi &
Wienenberger Airtiengesellscbaft, Pforzheim, Germany,
. a corporation of German
Filed Dec. 6, 1961, Ser. No. 157,454
Claims priority, application Germany Dec. 10, 1960
6 Elairns. (Qt. 59—79)
The present invention relates to an expansible link
bracelet, especially for carrying a wrist watch which con
sists of two superimposed layers of casin-glike links which
are offset relative to each other by the width of oneehalf
link, and in which each link casing of one layer is con
nected to two adjacent link casings of the other layer by
means of connecting brackets the arms of which project
into the link casings at both ends thereof and are pivoted
relative to the casings when the bracelet is being expanded.
By this pivoting movement, the bracket arms act upon
leaf springs which are mounted in the casings and press
these springs ?at. The outer webs of the connecting
brackets which face toward the longitudinal sides of the
bracelet are invisible since they are completely covered
up by the end walls of the link casings or by ornamental
cup-shaped members which are ?tted upon the ends of
the link casings.
‘In link bracelets of the above-mentioned type in which
the longitudinal sides of the bracelet are completely cov
ered for the purpose of rounding off the longitudinal
edges and for attaining a more pleasant appearance of the
bracelet, there is a considerable difficulty in ?nding a
suitable solution of shortening or lengthening the bracelet
so that any retailer who sells such bracelets will also be
easily able to fit the same to the wrist size of his customers
Without requiring any special tools.
It is therefore the principal object of the present inven
at the ends of a normal bracelet which are to be con
nected to the wrist watch, such means cannot be em
ployed if, for reasons of design and appearance, the
bracelet varies in width along its length and widens uni
forrnly or in a smooth curvature from its relatively nar
row central part toward both ends which have a width
substantially equal to that of the wrist watch. Obviously,
10 in this continuously widening part of the bracelet or at
its ends there is no possibility of adding or removing any
links without ruining its artistic appearance. The short
ening means must therefore be provided in the narrow
central part of the bracelet. These narrow central links
15 containing the shortening means should, however, not
vary in their outer appearance nor in their function from
all other links of the bracelet.
The object of the invention may be attained and all
of the above-mentioned requirements may be ful?lled if
20 the link ‘bracelet of the mentioned type has the following
additional features:
(a) The leaf springs of at least some of the link casings
of one layer of the bracelet which are preferably located
in‘ the central part thereof are made of a length shorter
25 than the distance between the opposite inner surfaces of
the outer webs of the connecting brackets, namely, by
the length of one of the bracket arms which project into
the link casing;
(b) These leaf springs are normally locked within the
30 link casing in a position in which they extend over and
act upon the free inner ends of all of the bracket arms
which project into the casing, and
(c) The inner Wall of each of these link casings which
faces toward the link casings of the other layer is provided
35 adjacent to each longitudinal side of the bracelet with an
aperture of a width,‘ as seen in the longitudinal direction
of the bracelet, which corresponds at least to the width
of the bracket arms and of a length which corresponds to
tion to provide an extensible link bracelet of the afore
the length of one of the bracket arms.
mentioned type with fool-proof means for permitting the
40
The present invention therefore resides in a combina
bracelet to be shortened or lengthened.
tion of the above-mentioned features, namely, the pro
in order to attain this object, it is necessary to comply
vision of a shorter leaf spring, of means for securing the
with a number of requirements some of which at least
Thus, the shortening
spring in its normal position, and of apertures in the inner
means should be entirely invisible during the normal use
wall of some of the link casings of one layer of the
tion without special instructions and without special tools.
of additional casings in the following manner;
seemingly contradict each other.
of the bracelet and should also not cause any annoyance 45 bracelet. By this combination of'features it is easily
possible to unhook certain individual link casings from
to the wearer. They must be of such a design that any
the bracelet or to lengthen the bracelet by the insertion
inexperienced person can carry out the shortening opera
The shortened spring is ?rst unlocked from its position
On the other hand, they must be so secure that the bracelet
in the link casing and shifted transversely to the longi
or parts thereof will never become unhooked uninten
tudinal direction of the bracelet so as to disengage from
tionally or of their own accord at the points where the
bracelet is adapted to be shortened or where it has been
one of the bracket arms. By this movement, the spring
completely uncovers the aperture in the inner wall of the
shortened. Furthermore, the shortening means must be
link casing at one end thereof, that is, at one longitudinal
of such a simple construction that they will not render
the mass-production of such bracelets more difficult, and 55 side of the bracelet, so that the respective bracket arm
it must also be possible to produce them on fully auto
may be lifted out through the aperture. Thereafter, the
leaf spring is shifted at the inside of the link casing in the
matic machines. The assembly of the individual parts
opposite direction transverse to the longitudinal direction
of the bracelet in the course of its manufacture must also
not entail any considerable additional time or labor be
of the bracelet, so that the opposite bracket arm can also
60
cause of a larger number of parts which might be re
be removed and the link casing will then be entirely free.
quired by the shortening means. Last but not least, the
After the bracket arms connecting a link casing of one
shortening means should be of such a design that even if
layer with two adjacent link casings of the other layer
the individual parts of the bracelet are merely gold-plated,
are thus unhooked from the latter and the bracelet is thus
there will be no possibility that, due to the shortening
means there will be any corrosive edges where the plated
material has been out which would render such bracelets
un?t for use in tropical countries.
Although there have already been a number of pre
shorted by one link casing of both layers, the free bracket
arms may be connected to the adjacent link casings of
the respective layer by reversing the above-mentioned
procedure. In a similar manner it is also possible to
lengthen the bracelet by adding one or more additional
vious proposals for shortening bracelets of this type, they 70 pairs of links. The operation of shifting the leaf spring
all fall short in complying with one or another of the
above-mentioned requirements. Furthermore, the follow
may be carried out very easily by means of a pointed tool,
for'example, tweezers, a knife, a small screw driver, or
acsases
3
the like, if the spring is removably locked in its normal
position in the link casing by its own spring force.
One preferred embodiment of the invention which has
proved very successful in actual practice consists in pro
viding the apertures in the inner wall of the respective
link casing of a width and length in accordance with the
has been shifted transversely of the bracelet, it is easily
possible likewise to unhook the opposite longer bracket
dimensions of an arm of the connecting bracket and within
necessary to start with the longer bracket arm.
Generally in bracelets of this type the links of the inner
layer which engage with the arm are made narrower than
one half of the width of the inner wall of the link oas~
arm inasmuch as the two parts of the bracelet which have
already been disconnected at one side may be pivoted
and twisted to a considerable extent. iFor hooking the
bracket arms into the link casing, it is then, however,
ing, as seen in the longitudinal direction of the bracelet.
In this manner it is only possible to remove from each 10 the links of the outer layer in order to prevent the skin
and hairs of the arm from being caught between the ad
link casing only the two opposite arms of one connecting
jacent inner links after the bracelet is slipped over the
bracket, while the other connecting bracket or the other
Wrist and also in order to insure that the bracelet will
pair of U-shaped brackets remains in the link casing.
snugly adhere to the arm. A bracelet of this type which
This is advisable because, whenever such a bracelet is to
be shortened or lengthened, one whole link unit consist 15 is already secured to a watch may be twisted about its
longitudinal axis to such an extent that the links of the
ing of a lower link and an upper link must be removed or
inner layer and‘ the bottom of the watch case which nor
inserted. This form of construction also facilitates the
mally engage with the arm are turned toward the outside.
operation of hooking the connecting brackets into the
When the bracelet is in this position, the leaf springs
link casings and of unhooking them therefrom.
In further developing this inventive concept, it has been 20 are only under a very slight tension. Furthermore, the
gaps between the links of the inner layer which now face
found advisable to provide these apertures in a position
outwardly are then visible and permit the insertion of a
pointed tool to shift the leaf springs within the respective
central butt joint between the two parts of the inner
link casings. It is therefore advisable to provide the
wall of the link casing, while the other longitudinal side
of the apertures extends parallel to but is spaced from 25 shortening means according to the invention, that is, the
shorter, transversely movable leaf springs and the aper
the edge between the inner wall and the adjacent side wall
tures in the inner wall of the link casings of one layer,
of the link casing so that a narrow strip of the inner wall
in those link casings which form the outer links when
remains between each aperture and the respective side
the bracelet is being worn.
wall. ‘By providing the apertures so that one longitudinal
The above-mentioned objects, features, and advantages
side of the apertures coincides with the butt joint between 30
of the present invention will become more clearly ap
the two parts of the inner wall, the manufacture of the
parent from the following detailed description thereof
link casings is very simple and actually no more difficult
which is to be read with reference to the accompanying
or expensive than that of the link casings without these
so that one longitudinal side thereof coincides with the
apertures. The marginal strips which remain adjacent
to the side wall of the link casing also form an additional
safety device for preventing any unintentional unhooking
drawings, in which—
FIGURE 1 shows a side view of a part of a bracelet
according to the invention, partly in the contracted posi
tion and partly in the expanded position;
of the connecting brackets from the respective link cas
FIGURE 2 shows a plan view of the bracelet, partly
ing since, before the bracket arm of one connecting
in a cross section taken along line II—II of FIGURE 1;
bracket can be removed through the associated aperture
FIGURE 3 shows a perspective enlarged view of a link
in the inner wall of the link casing, it is not only neces 40
of one layer of the bracelet together with the connecting
sary ?rst to shift the leaf spring in this casing toward one
brackets which are associated with this link; while
longitudinal side of the bracelet so as to disengage from
FIGURE 4 shows a View similar to FIGURE 3 of a
this bracket arm, but is also necessary to shift this bracket
modi?cation of the invention.
arm laterally against the action of the spring in the link
Referring to the drawings, the ?exible link bracelet
casing of the other layer which clamps upon the other 45
according to the invention consists of a plurality of casing
arm of this connecting bracket.
like links 10 forming an upper layer and of similar links
In order to permit the shortened, arcuately or ‘angularly
29 forming a lower layer. Each individual link casing
bent leaf spring to be locked in its normal central posi~
of one layer is pivotably connected to two adjacent link
tion in which its ends engage over and act upon all four
bracket arms which project into the link casing, and in 50 casings of the other layer by at least one pair of connect
ing brackets 30. These connecting brackets are prefer
order to permit this spring to be unlocked from the cen
ably U-shaped as shown at 31 in FIGURE 3, and they
tral position and then to be shifted transversely to the
are inserted in pairs into the link casings 26 from both
direction of expansion of the bracelet, the invention fur
ends thereof, that is, from both longitudinal sides ofthe
ther provides this leaf spring at its central apex with a
transverse projection in the form of a corrugation or head 55 bracelet. The connecting brackets 31 are operatively
associated with arcuately or angularly bent leaf springs
which in the normal position of the spring engages re
49 one of which is mounted at the inside of each link
siliently into a transverse slot in the inner Wall of the
casing and. is pressed ?at by the connecting bracket in a
link casing.
direction transverse to the longitudinal direction of the
For facilitating the insertion of the bracket arms into
the link casing, the ends of the biased leaf spring which 60 bracelet when the bracelet is expanded or twisted.
Springs 49 which are thus under tension then tend to
press upon the outer wall of the link casing are preferably
return the bracelet to its normal contracted condition.
bent or beveled away from this wall and the bracket
Instead of being made of two separate opposite U
arms which are to be inserted or removed are likewise
shaped brackets 31, each bracket unit 34} may also con
beveled at their ends. These beveled ends of the respec
tive bracket arms may then be easily pushed between 65 sist of a single bracket 32 of an open, substantially
rectangular shape, as illustrated in FIGURE 4, in which
the outer wall of the link casing and the bent or beveled
two opposite bracket arms are connected to each other.
FIGURE 12, as seen from the left toward the right,
It has further been found advisable to make at least
shows at ?rst a plan view of two upper links 10, then a
one of the two opposite bracket arms which are adapted
to be hooked into or unhooked ‘from the link casing 70 plan view of one and a half lower links 20 without the
shortening means, and then a lower link 20 from which
shorter than the other bracket arms which project into the
the inner wall is cut away and which shows the outer
same link casing. This has the advantage that the leaf
webs 33 of the connecting brackets 30 in section and the
spring in this casing must only be made slightly shorter
bent leaf spring 40 in a plan view. Finally, at the right,
than the springs in the normal casings since, after the
shorter bracket arm has been unhooked and the leaf spring 75 FIGURE 2 shows two links of one layer with the con—
ends of the spring.
3,084,503
5
tracting means according to the invention, as shown again
ence, whereas a considerably shorter leaf spring would be
in a perspective view in FIGURE 3. The second-last
link in FIGURE 2 is shown in a section which is taken
underneath the inner wall, While the last link shows a
plan view of the inner wall of the lower link.
too hard and stiff.
The position of apertures 25 and 29, as shown in FIG
URE 3, in only one half of the inner wall 22 of link cas
The links '10 and 20 of both layers are provided with
end walls 11 or 21, respectively, which cover up the
longitudinal sides of the bracelet so that the outer webs
33 of the connecting brackets are completely covered
ing 20 permits the removal of only two opposite vU-shaped
connecting brackets 31 or of only one rectangular bracket
unit 32, as indicated in FIGURE 4, while the other pair of
U-shaped brackets or the other rectangular bracket re
mains in- the link casing 26*. This facilitates the manipu
and the brackets cannot be removed from the link casings l0 lation of shortening or lengthening the bracelet since nor
mally only one link unit consisting of a lower link 20 and
unless these end walls are bent outwardly.
The shortening means according to the invention which
an upper link 10 is to be removed or inserted. .
are provided on some of the link casings of one layer,
that is, for example, of the lower links 20, will now
be described in detail with reference to FIGURE 3. The
inner split wall 22 of link casing 20 has approximately
at the center of its length a slot 23 into which a bead
If, however, the respective link casings should‘ be de
signed to permit both pairs of connecting ‘brackets or both
rectangular brackets to be removed from the link casing,
the apertures 25 and 29 are extended over the entire width
of the inner wall 22’ of casings 20’, as illustrated in FIG
or corrugation 41 resiliently engages which is provided
URE 4.
,
Obviously, it is immaterial whether the shortening
at the apex of the bent leaf spring '40. In order to
facilitate the insertion of the bracket arms 35, the ends 20 means according to the invention as previously described
42 of leaf spring ‘40 are curved upwardly. These arms
are provided in a few of the lower links or in a few of
35 lie between the ends 42 of the leaf spring and the
the upper links of the bracelet. It is also immaterial
outer wall of the link casing, and they are held in the
whether the end walls 11 of the link casings which form
position as illustrated in FIGURE 3 by the tension of the
the longitudinal sides of the bracelet, as shown in FIG-'
spring. In this position, the ends 42 of the spring engage 25 URE 1, are formed by bent-over tabs on the link casings
over the ends of all four bracket arms 35 which project
themselves or, for example, by separate ornamental cup-s
into the link casing 20. The bracket arms 34 which are
which are ?tted upon the end walls.
shown in FIGURE 3 outside of link casing 20 engage in
Although my invention has been illustrated and de
the same manner into the two adjacent link casings of
scribed with reference to the preferred embodiments there
the other layer, that is in this case, of the upper layer, 30 of, I wish to have it understood that it is in no way limited
where they cooperate in the same manner with similar
to the details of such embodiment, but is capable of nu
leaf springs.
merous modi?cations within the scope of the appended
Each leaf spring 40 has a total length shorter by the
claims.
length of one of the bracket arms 35 than the distance
Having thus fully disclose-d my invention, what I claim
between the inner surfaces 36 of webs 33 of the connect 35
ing brackets. By means of a pointed tool, for example, a
is:
1. In a ?exible bracelet, especially ‘for a wrist watch,
having a plurality of link casings forming two superim
posed layers offset relatively to each other by the width
of expansion of the bracelet, for example, in the direction
of substantially one-half link casing when said bracelet is
of arrow a in FIGURE 3, until its end 42 engages against 40 contracted and each having an outer wall, side walls, and
knife or a small screw driver, it is easily possible to shift
the leaf spring in a direction transverse to the direction
the inner surface 36 of Web 33‘ of at least one of the con
an inner wall facing toward the link casings of the other
necting brackets 33 at one side of the bracelet, whereby
the other end 42 of the spring slides off at least one of the
bracket arms 35 at the other side of the bracelet. This
‘layer, connecting brackets connecting each link casing of
bracket arm 35 may then be removed through an aperture
25 in the inner wall 22 of link casing 20. This aperture
25 has a length and width corresponding to those of
bracket arm 35, and in the embodiment according to FIG
URE 3 it is provided in such a position that one of its
longitudinal sides is in alignment with the central butt
joint 26 between the two parts of the inner wall 22. Thus,
adjacent to the edge between the inner wall 22 and side
wall 27 of the link casing 20 a narrow strip 28 remains
which requires the connecting bracket 31 to be slightly
one layer to two adjacent link casings of the other layer
and each having arms projecting into each link casing at
both ends thereof and pivotable within and relative to said
casing when the bracelet is being expanded and also havé
ing outer webs connecting said arms and disposed at the
longitudinal sides of the bracelet, covering means on the
outer ends of said casings for covering up said outer webs
toward the outside, at least one normally bent leaf spring
Within each casin g acting up on said bracket arms and tend
ing to maintain the bracelet in a contracted position, said
bracket arm-s adapted to bend said springs substantially
?at when the bracelet is being expanded, said inner wall
shifted laterally before the bracket arm 35 can be re
of at least some of said link casings of one layer having
moved through the aperture 25. This shifting can, how
apertures adjacent to the longitudinal sides of the bracelet,
ever, only be done against the action of the -leaf spring
each of said apertures having a width at least equal to the
in the associated link casing of the other layer.
width of one of said bracket arms within said casing and
After one side of the bracelet has in this manner been
a length substantially equal to the length of said arm, said
unhooked from the link casing, leaf spring 40 is shifted in
leaf springs in said last casings of said one layer having a
the opposite direction b so that the opposite bracket arm
length shorter substantially by the length of one of said
35 can likewise be removed from its associated aperture
bracket arms than the distance between the opposite inner
29 opposite to aperture 25.
surfaces of said outer Webs of said connecting bracket-s in
In the embodiment according to FIGURES 2 and 3, the
said last casings, and means for removably locking said
bracket arm 35' is made slightly shorter than the other 65 short leaf springs in said last link casings in a position in
three bracket arms 35. After this shorter arm 35’ has
which the ends of said springs extend over and act upon
been removed through aperture 25 in the manner as ‘de
all of said bracket arms in said last link casings.
scribed and leaf spring 40 has been shifted transversely
2. In a ?exible bracelet, especially for a wrist watch,
to the bracelet, it is easily possible also to remove the
having a plurality of link casings forming two superim
longer bracket arm 35, since the two parts of the bracelet 70 posed layers otfset relatively to each other by the width
which are then disconnected at one ‘side may now be bent
of substantially one-half link casing when said bracelet
or twisted relative to each other to a considerable extent.
is contracted and each having an outer wall, side walls,
By making ‘one bracket arm 35’ shorter than the other
and an inner wall facing toward the link casings of the
arms 35, the advantage is attained that spring 40‘ may be
other layer, connecting brackets connecting each link
made relatively long and will therefore have a good resili 75 casing of one layer to two adjacent link casings of the
3,084,503
O
0
other layer and each having arms projecting into each
link casing at both ends thereof and pivotable within and
relative to said casing when the braclet is being expanded
and also having outer webs connecting said arms and
disposed at the longitudinal sides of the bracelet, cover
ing means on the outer ends of said casings for covering
up said outer Webs toward the outside, at least one nor
mally bent leaf spring within each casing acting upon
other layer and each having arms projecting into each
link casing at both ends thereof and pivot-able within and
relative to said casing when the bracelet is being expanded
and also having outer webs connecting said arms and dis—
posed at the longitudinal sides of the bracelet, covering
means on the outer ends of said casings for covering up
said outer webs toward the outside, at least one normally
bent leaf spring having a central apex within each casing
acting upon said bracket arms and tending to maintain
said bracket arms and tending to maintain the bracelet
in a contracted position, said bracket arms adapted to 10 the bracelet in a contracted position, said bracket arms
bend said springs substantially ?at when the bracelet‘is
being expanded, said inner wall of at least some of said
link casings ,of one layer ‘having apertures adjacent to
the longitudinal sides of the bracelet, each of said aper
tures having a :width and length substantially equal to the 15
adapted to bend said springs substantially ?at when the
bracelet is being expanded, said inner wall of at least
some of said link casings of one layer having apertures
adjacent to the longitudinal sides of the bracelet, each
of said apertures having a width at least equal to the
width and length of one of said bracket arms within said
casing and being disposed at one side of the center of
width of one of said bracket arms within said casing and
the width of said inner wall, said leaf springs in said last
casings of said one layer having a length shorter sub
a length substantially equal to the length of said arm,
said leaf springs in said last casings of said one layer
having a length shorter substantially by the length of one
stantially by the length of one of said bracket arms than 20 of saidbracket arms than the distance between the 0p
posite inner surfaces of said outer webs of said connect
the distance between the opposite inner surfaces of said
ing brackets in said last casings, and means for re
outer webs of said connecting brackets in said last casings,
and means for removably locking said short leaf springs
movably locking said short leaf springs in said last link
casings in a position in which the ends of said springs
in said last link casings in a position in ‘which the ends
of said springs extend over and act upon all of said 25 extend over and act upon all of said bracket arms in said
last link casings, said locking means comprising a trans
bracket arms in said last link casings.
verse projection on said apex of said leaf spring, said
3. In a flexible bracelet, especially for a wrist Watch,
inner wall having a transverse slot, said projection on
having a plurality of link casings forming two superim
said leaf spring remov-ably inserted into said slot and
posed layers offset relatively to each other by the width
resiliently engaging with the walls thereof.
of substantially one-half link casing when said bracelet
5. In a ?exible bracelet, especially for a wrist watch,
is contracted and each having an outer wall, side walls,
having a plurality of link casings forming two superim
and an inner wall facing toward the link casings of the
other layer and composed of two substantially equal
wall portions abutting against each other substantially at
posed layers olfset relatively to each other by the width
of substantially one-half link casing when said bracelet
the center of the width of said inner wall, connecting 35 is contracted and each having an outer wall, side walls,
and an inner wall facing toward the link casings of the
brackets connecting each link casing of one layer to two
other layer, connecting brackets connecting each link
adjacent link casings of the other layer and each having
casing of one layer to two adjacent link casings of the
arms projecting into each link casing at both ends there
other layer ‘and each having arms projecting into each
of and pivotable within and relative to said casing when
the bracelet is being expanded and also having outer 40 link casing at both ends thereof and pivotable within and
relative to said casing when the bracelet is being expanded
webs connecting said arms and disposed at the longitu
and also having outer webs connecting said arms and
dinal sides of the bracelet, covering means on the outer
disposed at the longitudinal sides of the bracelet, cover
ends of said casings for covering up said outer webs to
ing ‘means on the outer ends of said casings for covering
ward the outside, at least one normally bent leaf spring
up said outer webs toward the outside, at least one nor
within each casing acting upon said bracket arms and
mally bent leaf spring within each casing acting upon
tending to maintain the bracelet in a contracted posi
said bracket arms and tending to maintain the bracelet
tion, said bracket arms adapted to bend said springs sub
in a contracted position, said bracket arms adapted to
stantially ?at when the bracelet is being expanded, said
bend said springs substantially flat when the bracelet is
inner wall of at least some of said link casings of one
being expanded, said inner wall of at least some of said
layer having apertures adjacent to the longitudinal sides
link casings of one layer having apertures adjacent to
of the bracelet, each of said apertures having a width
and length substantially equal to the width and length
the longitudinal sides of the bracelet, each of said aper
tures having a width at least equal to the width of one
of one of said bracket arms within said casing and having
one longitudinal side coinciding with the butt joint be
of said bracket arms within said casing and a length sub
tween said two wall portions of said inner wall, the other
stantially equal to the length of said arm, said leaf springs
longitudinal side of said apertures extending parallel to
in said last casings of said one layer having a length
but spaced from the edge between said inner wall and
shorter substantially by the length of one of said bracket
one of said side walls of said casing so as to leave a mar
arms than the distance between the opposite inner sur
faces of said outer webs of said connecting brackets in
last casings of said one layer having a length shorter sub
said last casings, and means for removably locking said
stantially by the length of one of said bracket arms than
short leaf springs in said last link casings in a position in
the distance between the opposite inner surfaces of said
which the ends of said springs extend over and act upon
outer webs of said connecting brackets in said last casings,
all of said bracket ‘arms in said last link casings, the ends
and means for removably locking said short leaf springs
at least of said leaf springs being beveled away from said
in said last link casings in a position in which, the ends 65 outer wall of said casing to facilitate the ends of said
of said springs extend over and act upon all of said bracket
bracket arms to be inserted bet-ween said springs and said
arms in said last link casings.
outer wall.
4. In a flexible bracelet, especially for a wrist watch,
6. vIn a flexible bracelet, especially for a wrist watch,
ginal strip of said inner wall, said leaf springs in said
having a plurality of link casings forming two superim
having a plurality of link casings forming two superim
posed layers of‘fset relatively to each other by the width 70 posed layers offset relatively to each other by the width
of substantially one-half link casing when said bracelet
of substantially one-half link casing when said bracelet
is contracted and each having an outer wall, side walls,
is contracted and each having an outer wall, side walls,
and an inner wall facing toward the link casings of the
and an inner wall facing toward the link casings of the
other layer, connecting brackets connecting each link
casing of one layer to two adjacent link casings of the 75 other layer, connecting brackets connecting each link
3,084,503
casing of one layer to two adjacent link casings of the
other layer and each having arms projecting into each
link casing at both ends thereof and pivotable within and
relative to said casing when the bracelet is being expanded
10
casing, each of said apertures having a width at least equal
to the width of the respective bracket arm to be inserted
into or removed from said aperture and a length substan
tially equal to the length of said arm, said leaf springs in
said last casings of said one layer having a length shorter
and also having outer webs connecting said arms and
substantially by the length of one of said bracket arms
disposed at the longitudinal sides of the bracelet, covering
than the distance between the opposite inner surfaces of
means on the outer ends of said casings for covering up
said outer webs of said connecting brackets in said last
said outer webs toward the outside, at least one normally
casings, and means for removably locking said short leaf
bent leaf spring within each casing acting upon said
bracket arms and tending to maintain the bracelet in a 10 springs in said last link casings in a position in which the
ends of said springs extend over and act upon all of said
contracted position, said bracket arms adapted to bend
bracket arms in said last link casings.
said springs substantially ?at when the bracelet is being
expanded, said inner wall of at least some of said link
References Cited in the ?le of this patent
casings of one layer having apertures adjacent to the longi
15
UNITED STATES PATENTS
tudinal sides of the bracelet, at least one of the two
opposite bracket arms in said last casings being shorter
Stiegele ________________ __ July 1, 1958
2,840,982
than the other bracket arms projecting into the same
Sasaki _______________ __ Oct. 25, 1960
2,957,303
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