Horology: time measuring systems or devices – Cases – Wrist worn
Patent
1990-02-27
1991-11-12
Roskoski, Bernard
Horology: time measuring systems or devices
Cases
Wrist worn
G04B 3700
Patent
active
050653768
DESCRIPTION:
BRIEF SUMMARY
The present invention is concerned with a wristwatch with a removable and interchangeable strap.
BACKGROUND OF THE INVENTION
The hour module of a wristwatch has always been the most valuable element of the assembly. Hence, the tendency has always been to make the straps, whether they be made of leather, fabric or metal, replaceable and comprised of two portions fastened to the module through fastening pins.
The various systems which have been adopted are so well known to all, that their enumeration here is of no interest.
Since some years ago, fashion has led to conceiving straps which are interchangeable rather than simply replaceable.
This new trend enables the user to match the strap to his or her other vestimentary elements.
Primarily, the difficulty encountered in the manufacture of interchangeable straps lies in the mode of adapation of the module to the strap.
Solutions, more or less original, have been proposed. The solutions which were the most satisfactory relied on a strap covered with stretched fabric, to which the module could be attached transversaly by various clip means.
Because of the requirements, the solutions which were proposed excluded their application to straps covered with leather or made of metal; the elasticity and the flexibility of the fabric were absolutely necessary for the attachment of the module.
In addition to this drawback concerning the material, the solutions which were proposed had the disadvantage of involving manipulations which, although they cannot be considered as complex, nevertheless require if not skill, at least patience.
SUMMARY OF THE INVENTION
The purpose of the present invention is to provide a wristwatch with a removable and interchangeable strap, which enables the use of leather as covering material and which is extremely simple to handle when making use of the interchangeable feature and when replacing one strap by another one.
To this end, the invention provides a wristwatch with a removable and interchangeable strap, comprising a clasp acting by co-operating male and female members, a single-piece strap connecting the two parts of the clasp, an hour module and means for fastening the hour module on the strap, characterized in that the strap comprises a recess, the shape of which corresponds to that of the hour module so as to provide a housing therefor, in that it further comprises at each extremity thereof, a groove designed for co-operating with a clamping member with which both of the two parts of the clasp are provided and in that the hour module comprises two toes designed for slidably co-operating with the profiled extremities of a ring fastener, in such a manner as to retain the module on the strap by the combined effect of the positioning of the module within its housing and of the clamping of the module in this position by the effect of the ring.
The male part of the clasp can comprise notches and the female part a member co-operating with said notches in such a manner as to vary the length of the strap from notch to notch, according to the more or less deeper penetration of the male part into the female part.
The clamping members, with which the two parts of the clasp are provided, can be excentrical pivoting clamps, the pressing part of which comprises an enlargement, the shape of which corresponds to that of the grooves provided at each extremity of the strap.
The ring fastener can have the shape of one half of a crown which fits onto one half of the hour module, and it can include at each extremity thereof, a U-shaped profile designed to press, on the one hand, against the lower surface of the strap and, on the other hand, against the toes of the module, the toes of the module and the profiled extremities of the ring being made to include male-female members, the co-operation of which maintains the module with a determined orientation, thus preventing the module from pivoting and from freeing its toes from the extremity of the ring.
The shape of the lower part of the module and that of the housing designed for receiving it, can inc
REFERENCES:
patent: 2219277 (1940-10-01), Kaufmann
patent: 3189096 (1940-02-01), Alonge
patent: 3492809 (1970-02-01), Gisiger-lusa
patent: 4167850 (1979-09-01), Schneider
patent: 4229936 (1980-10-01), Schneider et al.
patent: 4742503 (1988-05-01), Braun et al.
patent: 4958527 (1990-09-01), Proellochs
patent: 4964092 (1990-10-01), Brida
Produsta S.A.
Roskoski Bernard
LandOfFree
Wristwatch with removable and interchangeable strap does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wristwatch with removable and interchangeable strap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wristwatch with removable and interchangeable strap will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1017854