CH675339B5 - - Google Patents

Abstract

The watch casing (8,9) includes a cylindrical seating (10) inside which a box (14) is fitted to hold the movement. The box is retained by an elastic torus shaped ring (13) which fits on the one hand into a channel within the cyilndrical seating, and on the other hand into a peripheral annular channel (15) on the box. The casing includes a metal frame to which the bracelet may be fastened, but need not itself be made of metal. The inner box may include a flexible base, allowing operation of electric contacts by applying pressure. USE - Non-metallic wrist watch casing.

Description

1

CH 675 339G A3

2

Description

The subject of the present invention is a wristwatch comprising a middle part made of non-metallic material housing a movement housed in an ad hoc case fixed to the middle part.

From patent CH 604 242, a wristwatch is known whose wooden middle has a cylindrical hollow in which the metal case housing the movement is fixed by means of screws or feet secured to a metal part constituting the bracelet or having means for attaching the bracelet.

From patent CH 659 166, there is also known a wristwatch whose stone middle has a cylindrical housing in which is glued a metal inner middle in which the movement case is itself held by means of a plate metal fixed by screws to the internal metal middle.

It is also known from patent FR 2 176153 to fix a case in a metal middle by means of an elastic O-ring, the middle having, for this purpose, a groove in which the lining is housed.

The object of the invention is to produce a wristwatch, the middle of which is made of non-metallic material, in particular of wood or of a more fragile material, nevertheless makes it possible to attach a case to it by means of an elastic O-ring securely and securely. .

The wristwatch according to the invention is defined in claim 1.

The O-ring is the only means of fixing the housing, this elastic fixing sheltering the housing against shocks. The metal frame, sandwiched between the two non-metallic parts of the middle, supports the significant efforts.

The accompanying drawing shows, by way of example, an embodiment of the invention.

Figure 1 is a diametral sectional view at six o'clock twelve o'clock of a wooden frame watch.

Figure 2 is a view of the same wristwatch in section at three o'clock nine o'clock, without the movement.

Figure 3 is a plan view of the metal frame of this watch.

The watch shown in the drawing comprises a metal frame as shown in Figure 3, that is to say cut from a metal plate or sheet so as to obtain an annular part 1 provided with two opposite parallel bars 2 and 3 whose ends are bent at right angles so as to form ears 4, 5, 6 and 7 between which it is possible to fix the bars of a usual bracelet. The annular part 1 of the metal frame is sandwiched between two pieces of wood 8 and 9 profiled so as to form a middle part having a cylindrical housing 10 extending over the entire height of the middle part. On the three o'clock nine o'clock sectional view represented in FIG. 2, it can be seen that the annular part 1 of the frame is hidden, the two parts 8 and 9 of the middle part pressing one against the other around the frame. The two parts 8 and 9 of the middle part can be glued together on their joint plane 19, simultaneously maintaining the armature, or fixed together by means of screws. The upper part 8 of the middle part has a shoulder 11 in the form of a staircase forming with the inner edge of the annular part 1 of the frame a groove 12 of rectangular section in the wall of the cylindrical housing 10. In this groove 12 is housed an elastic O-ring 13 protruding from this groove.

In the cylindrical housing 10 of the middle part is housed a housing 14 housing a movement. This cylindrical housing 14 is provided with a peripheral groove 15 of triangular section whose lower wall 16 is planar. The O-ring 13 is also engaged in the groove 15, holding the housing 14 axially and transversely. Given the flat wall 16 of the groove 15, the fixing of the housing withstands a certain pressure on the bottom 17 of the housing. This makes it possible to use a box having movement control members constituted by pushers arranged on the bottom 17.

The housing may have a flexible bottom 17 enabling electrical contacts of an electronic movement to be actuated by simple pressure.

The housing 14 can be easily removed for repair or exchanged, by simple pressure on the lens of the glass 18. The housing is put in place from below, by simple pressure on the bottom.

The middle 8, 9 can be made of any non-metallic, natural or synthetic material. Parts 8 and 9 can be made of different materials.

The case 14 can house a mechanical movement fitted with a winder on the bottom, for example a winder as described in patent CH 632 369.

Claims (1)

Claims 1. Wrist watch comprising a middle part made of non-metallic material (8, 9) housing a movement housed in a case (14) fixed to the middle part, characterized in that the middle part (8, 9) has a cylindrical housing (10 ) in which said housing (14) is fixed by an elastic O-ring (13) engaged, on the one hand, in an annular groove (12) of the cylindrical housing and, on the other hand, in a peripheral annular groove (15) of the case, and by the fact that the middle part is in two superposed parts (8, 9), between which is mounted a continuous metal frame provided with means for attaching a bracelet (2, 3) and having an annular part ( 1) inserted between the two parts of the non-metallic middle part, the inner edge of this annular part constituting one of the lateral walls of the groove (12), of rectangular section, of said cylindrical housing, formed on the other hand by a shoulder (11) of one of the parts of non-metallic build allique. 5 10 15 20 25 30 35 40 45 50 55 60 65 3