DE8106636U1 - Watch glass clasp - Google Patents

Description

Description;

The innovation concerns a watch glass closure for watch cases v ^ n Wrist and pocket watches in dust- and waterproof design as a round or molded case with a watch glass made of transparent synthetic

(R)
Material, such as plexiglass with a circumferential groove for a seal

An angular glass seal is known in mineral glasses to be arranged at the lower edge of the glass and thus a ^> deaf and water tightness to be reached when inserting into the glass rim on the watch case. However, this insertion requires skill and practice in order to tilt and to avoid leaks resulting from this.

for plastic watch glasses with a protruding mounting flange circumferential grooves rr.with inserted sealing ring known. These require strong watch glasses and are also not absolutely tight. It is now the task of the innovation to ensure a perfect dust and Watertightness for watch glasses made of transparent plastic To achieve the lowest possible need even for flat watch cases.

The UhrylasverscMuB according to the preamble of claim 1 characterizes this can be done by an insert edge on the watch glass with uni-

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running box flange, which has a circumferential shaped groove, in particular Round groove for receiving an endless rubber-elastic sealing thread is connected upstream, the KastfLansch to engage in a circumferential groove in the glass edge of the watch case and the sealing thread the circumferential joint seal and the circular groove the circumferential The snap-in flange on the insert edge of the watch glass immediately follows and, if necessary, cuts them slightly and rounds them Sealing thread takes up «This takes place at the edge of the circumferential groove when the Uichtunys thread is attached, i.e. even with the smallest Sealing volume, infolye of the high pressure along the contact edge a secure seal.

A preferred embodiment of a watch glass closure according to FIG The innovation is attached as a sectional view.

As can be seen from this, the watch case 1 has a circumferential groove έ in the edge of the glass, which is used to engage the plastic glass 3 with its circumferential box flange 4. This locking flange 4 follows on the plastic glass 3 in the embodiment, a circumferential Kundnut 5 for receiving an endless, rubber-elastic sealing thread b. In the inserted state of the plastic glass 3, the elastic Uichtungfaden 6 presses itself sealingly on the inside of the glass edge of the watch case 1 and on the edge of the circumferential groove 2, as can be seen from the drawing. This achieves a perfect dust and watertight watch closure, even with plastic glasses,

which, moreover, enables the watch glass to be set easily with conventional setting tools and, in any case, to a sealing Closure leads. A round groove with a corresponding sealing thread is particularly suitable for this, as this makes a simple one Put the watch glass and secure seal is achieved.

The plastic watch glass can be pressed flat on both sides or with an inner indentation 7 in order to obtain more space in the display part above the work space 8. In addition to the desired Watertightness in wristwatches is especially important for quartz watches, especially in order to avoid the following malfunctions to be avoided in the factory. The circular groove 5 follows the circumferential locking flange 4 on the insert edge of the watch glass 3 directly or undercut this if necessary.

Claims (2)

Company Otto Trottner GmbH, 753U Pforzheim watch glass lock protection claims: 1. Watch glass clasp for watch cases of wrist and pocket watches in a dust- and watertight version as a round or Molded case with watch glass made of transparent plastic, such as Piexi- (R)
$ las with a circumferential groove for a sealing ring, marked by an insert edge on the watch glass with a circumferential locking flange (4 which is preceded by a circumferential shaped groove, in particular a circular groove (5) for receiving an endless, rubber-elastic sealing thread (6), with the box flange (4) for Intervention in a surrounding hat (2) in the glass rim Ki) dea watch case and the sealing thread (6) is used for the circumferential joint seal. 2. watch glass closure according to claim 1, characterized in that that the round groove ( ¹ J) immediately follows the circumferential locking flange (4) on the tOintet edge of the watch glass and, if necessary, undercuts this slightly and receives a tu ride η dich tuncjsf aden (6;). I <* l «It ·