摘要:
The invention concerns a device for securing a back cover on a middle part of a watchcase, characterized in that it includes an intermediate element to which the back cover is connected, said intermediate element being screwed onto the middle part of the watch, means being provided to allow the back cover to drive the intermediate element in rotation until the latter reaches a locked position on the middle part, the back cover also being able to be pivoted relative to the intermediate element without the latter being unscrewed for alignment with the 12 o'clock-6 o'clock axis of the watch.
摘要:
The wristband with a clasp (1) includes electrical connection means (2) for connection to at least one electric or electronic component (23). These electrical connection means include an electric connector (2) arranged in one part of the clasp connected to one end of a wristband strand. The connector is of the universal serial bus type so as to be able to be connected, when the clasp is in the open position, to a connector of complementary shape of an electric apparatus, such as a computer station for carrying out energy and/or data transmission with the electric or electronic component. The connector is protected by a fastening piece (6) and bellows (5) when the clasp is in the closed position.
摘要:
The vehicle (1) comprises a driving wheel (2) driven by an electric motor (3) whose control circuit (4) is supplied by a generator (6) coupled to a fuel engine (5), and a sensor (18) supplying a power-setting control signal (SC) representative of the position of an accelerator pedal (17) and hence of the desired power that the electric motor (3) has to supply to the wheel (2). To avoid having to provide the vehicle (1) with a large capacity traction battery, the vehicle further comprises means (7, 14 to 16, 19, 20) responsive to the power setting signal (SC) to regulate the rotational speed of the fuel engine (5) to the value at which the latter supplies a mechanical power (Pm) that is equal, firstly, to the desired power and, secondly, to a predetermined fraction of its maximum power.
摘要:
To simplify fitting and sealing the crystal (4) to the casing (2, 6, 8), assembly is effected by means of ultrasonic welding. The casing (2, 6, 8) and the crystal (4) are made of synthetic materials which are thermo-weldable to each other. The mating faces (8a, 4b) of the peripheral wall (8) of the casing and the crystal (4) are formed for reducing the contact area between the two parts to permit thermo-welding by subjecting the assembly to high-frequency mechanical vibrations imparted by a tool (15).
摘要:
A watch is described having a case made of an alloy or of a metal compound, e.g. stainless steel, which provides an integral bottom-plate structure. The case consists of a stack of plates. The two outermost plates form a back and a bezel, bearing the watch glass, respectively. The remaining plates are formed with openings that together define in the case housings for accommodating components of the watch.
摘要:
The time setting intermediate wheel 20 comprises both a wheel 20a which engages with the sliding crown wheel 8 when the crown wheel is slid in to the illustrated engaged position, and a pinion 20b which engages with a wheel of the watch gear train, for example the minute wheel 26a of the motionwork wheel 26.
摘要:
A one-piece molded plastic bridge for use in a timepiece module that itself comprises a frame assembly, at least two stepping motors each comprising at least a stator and rotor, and a plurality of gears assemblies, is provided. In a preferred embodiment, the bridge comprises sections separated by connecting members, with each of the connecting members being sufficiently flexible to accommodate for the needed spacing constraints on each section.
摘要:
A vehicle (31) has a composite braking system (electric and mechanical). This composite braking system having asynchronous electric motors (4a to 4d) associated with the wheels (2a to 2d) and a mechanical braking device having a hydraulic circuit (14) and mechanical brakes (18a to 18d). The composite braking system also has an electronic measuring device (36) connected to rotation frequency sensors (34a to 34d) disposed on each of the wheels, this electronic device supplying a reference signal to the control circuit (6) of the asynchronous electric motors which regulate the stator frequency of these motors as a function of the value of the reference signal. The braking system of the invention is anti-locking and very effective in any driving situation.
摘要:
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.
摘要:
To simplify fitting and sealing the crystal (4) to the casing (2, 6, 8), assembly is effected by means of ultrasonic welding. The casing (2, 6, 8) and the crystal (4) are made of synthetic materials which are thermo-weldable to each other. The mating faces (8a, 4b) of the peripheral wall (8) of the casing and the crystal (4) are formed for reducing the contact area between the two parts to permit thermo-welding by subjecting the assembly to high-frequency mechanical vibrations imparted by a tool (15).