Eta Sa Fabriques D'ebauches

Other

Andre Triponez

Jacques Muller

Beat Gilomen

Michel Schwab

Jean-Philippe Rebeaud

Cyril Veuilleumier

Jean-Pierre Schindler

The electronic watch includes hands ( ) indicating the time, a device ( ) displaying at least the date, this device being formed of first ( ) and second ( ) indicators on which are marked figures ( ) respectively indicating the tens and the units of said date. A control member able to be activated manually allows the hands to be set to the correct time and the date to be set. The first ( ) and second ( ) indicators are each driven by an independent motor ( ).

Electronic watch with a large date aperture

The invention concerns electronic chronograph watches which include a central hour hand ( ), a central minute hand ( ) and a small off-central second hand ( ) for permanently indicating the current time, chronograph hands ( ) for indicating a measured time when the watch is operating in chronograph mode, drive units for driving said hands and generator means responding to manual control means (P , P ) to apply control pulses to said drive units. According to the invention, the watch also includes a central second hand ( ) driven by its own drive unit and the generator means include means for selectively applying the control pulses to this drive unit, so that the central second hand indicates the seconds of the current time, in phase with the small off-center second hand ( ), when the watch is operating normally and the measured seconds when the watch is operating in chronograph mode.

Electronic chronograph watch

The timepiece of this invention comprises an electromagnetic motor (100) the stator (2) of which is flat and at least partially covered by a reinforcement plate (68) of non-magnetic material or, if need be, of very low magnetic permeability which has been attached to it, preferably by welding, prior to subjecting it in bulk along with others, to reheating thereby to protect it during such operation against the risk of deformation or breakage which would render it thereafter unusable. In conformity with the invention and to avoid such plate becoming a useless extra part taking up space in the timepiece, it includes means which enable it to form at the same time another element of the timepiece. Such element may be for instance a trigger piece jumper spring (72) which cooperates with a trigger piece (212) in order to define stable positions of a manual control stem (184) which may be axially displaced.

Electronic timepiece with analog display

An object, which is particularly destined for use in horology or jewelry, includes a substrate which constitutes the framework and which is preferably formed from injected cast aluminium. A decorative and protective coating overlays the substrate, such coating consisting of a deposit of a first layer of aluminium in a substantially pure state and a second layer capping the first, said second layer being constituted of aluminium oxide formed from the first layer. The object may be a watch case or a bracelet link.

Object capped by a protective layer

The wrist watch of this invention includes a caseband (18) and a baseplate (20) formed as a single piece to give a baseplate-caseband (10). The baseplate-caseband is entirely coated by a thin protective layer (60) of substantially constant thickness. In order to protect the portions of the caseband exposed to exterior stresses (shocks etc.) the baseplate-casband is borne by two longitudinal struts (1) fastened on either side of the caseband. These struts are provided in a manner such that they exhibit a greater resistance to said exterior stresses than does the baseplate-caseband. In particular the longitudinal struts (1) are coated with a protective layer (61) of greater thickness than the layer (60) which coats the baseplate-caseband.

Watch case including a baseplate-caseband borne by two longitudinal

A timepiece includes at least two motors (1, 2), in which the shafts (4, 16) of the rotors (3, 15) are arranged head-to-foot in a manner such that the free end of the pinion (27) fixed to the shaft of one rotor extends in the direction opposite to that in which extends the free end of the pinion (30) fixed to the shaft of the other rotor. Each of the pinions (27, 30) is in mesh with a toothed wheel (26, 29), such wheels being mounted coaxially with one another on either side of a base plate (40). Each of the wheels directly controls a hand (25, 28) indicating a unit of time.

Timepiece including at least two motors

The device comprises a photo-electric detection sensor (4), a luminescent diode (1) that produces a light beam for illuminating the detection sensor (4) and an opaque element (5) that is formed with an opening (6) and is mechanically connected to a mobile member (A), such as a hand of a timepiece, whose transit through a reference position is to be detected. The opaque element (5) and the opening (6) are so disposed as to allow the light beam to travel on or to be interrupted depending on whether the mobile element (A) is in its reference position or in another position. The device further comprises a comparator (13) which compares the signal produced by the detection sensor (4) with a reference signal produced in response to a signal supplied by a reference photo-electric sensor (9) that is manufactured on the same plate of semi-conductor material (3) as the detection sensor (4) and is so disposed as to receive no light.

Device for detecting the transit of a mobile member through a reference

A watch middle cum plate is described that comprises an annular middle-forming portion and a plate-forming portion which is surrounded by the middle-forming portion and which is formed with recesses for receiving components of the watch movement. The middle cum plate is provided with a protective coating of which a first part essentially covers the plate-forming portion and of which a second, thicker, more resistant part covers at least the visible surfaces of the middle-forming portion. Such middles cum plates may be made from flat brass blanks by machining recesses in their central portion for receiving components of a watch movement, by applying to the blanks a layer of material that is chemically more inert than brass to form the first part of the above coating, stacking and assembling the blanks such that at least the above central portions of the blanks with the recesses are masked, and applying to the visible regions of the stacked and assembled blanks the above second part of the coating.

Integral watch case middle and movement plate and method of making same

A driving mechanism for a day and date calendar device comprising two Maltese crosses from which one activates the display of the days and the other the display of the dates. One of said Maltese crosses includes a magnetic clutch serving as disconnecting-gear when the date indication only is changed.

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Lamboing, Switzerland

Andre Triponez