845 results about "Balance spring" patented technology

The application discloses a method of making a balance spring (100) from continuous fibres or ceramic by winding them around a cylindrical former (90), interspaced with a releasing agent (110). Also disclosed is a method of making a balance spring, preferably of a ceramic material (60), by applying it to a rotating former (70) mandrel or plate and subsequently heat treating. Balance wheels (30) having a moment of inertia which decreases with a rise in temperature due to a special arrangement of components (8, 9, 10) having different coefficients of thermal expansion are also disclosed. A mechanical oscillator system comprising a non-magnetic ceramic or continuous fibre balance spring (50) and a non-magnetic balance wheel (30) formed of a material having a coefficient of thermal expansion of less than 6×10⁻⁶K⁻¹ and having a plurality of non-magnetic poising or timing appendages (5) is also disclosed.

A balance wheel having a thermally adjustable moment of inertia is described. In one aspect, the balance wheel includes radially movable compensation portions formed of shape memory material exhibiting a two-way memory effect. The radius of gyration of the balance wheel is therefore adjustable with temperature to compensate for thermoelastic effects in a balance spring attached to the balance wheel. In another aspect, a thermally stable balance wheel includes dynamically adjusting appendages whose expansion or contraction with temperature relative to the balance wheel cause change in its moment of inertia. The invention can compensate for both ‘normal’ and ‘abnormal’ thermoelastic spring behaviour.

The invention discloses a thrombus elasticity testing device. The thrombus elasticity testing device comprises a supporting plate, a measuring unit, a driving unit and a cup holding unit, wherein the measuring unit and the driving unit are arranged on the supporting plate, and the cup holding unit is connected with the driving unit; the measuring unit comprises a base, a rotating part, a rotating shaft and a balance spring. According to the thrombus elasticity testing device, the driving unit is combined with the cup holding unit to carry out regular vibration on a blood sample in a measuring cup to simulate a physiological thrombus formation environment in vivo, thereby guaranteeing an accurate and reliable test result; by virtue of a structure consisting of the conical tip-shaped rotating shaft and the balance spring in the measuring unit, friction generated during vibration of the measuring unit is decreased sharply, and the shock resistance of the complete device is greatly improved on the premise of guaranteeing restoring force, so that the measurement reliability is high; by virtue of an optical lever measuring mechanism, the resolving ability and sensitivity of thrombus elasticity measurement are effectively increased, so that the measuring accuracy is remarkably improved; by virtue of a measuring cup loading-unloading mechanism, the operation is convenient and reliable.

The invention discloses a lasso drive based upper limb rehabilitation exoskeleton robot comprising a wrist outward swaying/inward retraction joint, a wrist forward flexion/backward extension joint, a wrist medial rotation/lateral rotation joint, an elbow forward flexion/backward extension joint, a shoulder forward flexion/backward extension joint, a shoulder forward flexion/backward extension joint, a shoulder medial rotation/lateral rotation joint and a lasso drive device. The shoulder, elbow and wrist medial rotation/lateral rotation joints are connected with motors fixed on a support through lassos, and driving moment is transmitted to all the joints through the lassos; the wrist outward swaying/inward retraction joint and the wrist forward flexion/backward extension joint are directly driven by motors; encoders are arranged in the motors and used for measuring internal posture of the exoskeleton; a six-dimensional force sensor is mounted to the wrist and used for measuring man-machine interaction force; balance springs are mounted to the shoulder and the elbow, and gravity balance of the whole mechanism can be realized. The problem of overlarge joint weight and inertia is solved, lightweight design is realized, power consumption is reduced effectively, system safety performance is improved, and multi-mode rehabilitation training can be realized.

The invention relates to a mechanical oscillating system for watches, especially wrist watches, having a balance spring and an oscillating body.

The resonator (1) for a timepiece results from coupling a first, low frequency resonator (2) with a second, higher frequency resonator (3). The first resonator (2) has a first balance (4) associated with a first balance spring (5). The second resonator (3) has a second balance (6) associated with a second balance spring (7). A third balance spring is arranged between the first (4) and second (6) balances to couple said first (2) and second (3) resonators.

There is disclosed a wristwatch having a case containing a mechanical watch movement (10) driven by a spring barrel (14) and provided with a mechanical regulator with a balance and balance-spring, which is associated, via electromagnetic coupling, with an electronic regulator driven by a quartz resonator. The rim of the balance (13) is provided with a pair of permanent magnets (38, 39). The electronic regulator includes a fixed coil (12) arranged for cooperating with said magnets via electromagnetic coupling, a rectifier (58) provided with at least one capacitor, and a circuit (60) for enslaving the frequency of the mechanical regulator to the frequency of the oscillator by braking obtained by briefly short-circuiting the coil. In order to enable a common type of mechanical movement to be used, only the balance of which is altered, the electronic regulator is formed by a structural module (11) that is entirely separate from the mechanical watch movement (10). This module can be fixed to the movement plate, or, conversely, carried by the watchcase independently of said movement, in particular via a casing ring (26). Apart from the coil, all of the rest of the electronic module (11) is preferably located outside the mechanical movement.

There is provided a regulator pin structure that is not only easily assembled but also capable of holding a hairspring in a gap without a risk of the hairspring being released, a regulator with the regulator pin structure, a structure of balance with hairspring, and a mechanical timepiece. A regulator pin structure of a regulator that is a component of a structure of balance with hairspring of a mechanical timepiece includes a pin-like body, a base that is situated on one end of the body and mounted to a body of regulator such that the position of the base is adjustable around the pivotal center axis E of the body, and a pair of two-pronged legs that extend from the other end of the body. The regulator pin structure is configured such that part of the outer end of a hairspring that is situated beyond a reformed portion of the hairspring along the outer circumference direction is freely fitted in a gap between the legs. Canopy-like projections are formed on at least one side edge of the front portion of at least one of the pair of legs in such a manner that the canopy-like projections laterally project along sides of the legs that face toward the gap. Regulator pin structure and regulator with the same, structure of balance with hairspring, and mechanical timepiece

The invention relates to establishment for a test device and a test method for the bending fracture performance of thin-film materials, in particular to an in situ evaluation system and a method of the mechanical reliability of a layer or a plurality of layers of thin-film materials with the micron to nanometer thickness on a flexible electronic substrate. The system comprises a high-precision micrometer caliper, a balance spring, a translational slide block, a freely supported beam fixed end, a freely supported beam movable end, and the like, wherein a composite beam comprising the micrometer caliper and a flexible substrate exerts precise and controllable step displacement to implement freely supported beam bending experiments; real-time exerted strain corresponding to a freely supported beam span is computed according to parameters and geometrical relationship of the freely supported beam span, sample sizes, and the like; and the bending fracture performance and critical cracking strain of the kind of thin film are tested and evaluated by combining in situ microscopic observation and subsequent scanning electron microscope characterization. The invention does not need to consider the electroconductibility of the thin-film materials, and is still adaptable for non-conductive thin-film materials. The experiment operation is simple and fast, in situ real-time positioning observation and analysis can be carried out on samples.

The invention relates to a fatigue resistance testing device for a rubber membrane. A reciprocating transmission mechanism adopts a double-eccenter connecting rod type structure and is positioned on the top of the device; the top end of a reciprocating rod is connected with a counter; the reciprocating transmission mechanism is in driving communication with a motor arranged on the right top of the device; the bottom end of the reciprocating rod is in mechanical connection with a membrane clamping mechanism; the bottom of the center of the clamping mechanism is provided with a balancing spring; the right end of the membrane clamping mechanism is communicated with an air pressure pump through a valve; the middle part of an air inlet pipe is connected in series with an air pressure sensor and an air pressure meter; the middle part of the reciprocating rod is provided with a fixing piece; the upper part and the lower part of the reciprocating rod are provided with a sliding sleeve respectively; and the sliding sleeve restricts the moving direction of the reciprocating rod. The fatigue resistance testing device has the advantages of simple structural principle, large testing range, high efficiency, convenient operation and use, safe and reliable operation and good automation degree.

The balance spring is made from a photostructurable glass plate by UV irradiation, thermal treatment and etching, said glass having a Young's modulus thermal coefficient CTE₀. The value CTE₀ of selected zones of the balance spring are altered to a value CTE_i by UV irradiation through one or several masks, possibly completed by a thermal treatment.

The collet, which can be made in a single piece and at the same time as the balance-spring, is formed by a plate (1) which includes an aperture (3) for attachment to a balance staff (5) and has an asymmetrical contour (9) which follows at a substantially constant distance d the contour of the first coil (11) of the inner terminal curve. The plate can further include recesses (13) for repositioning the centre of gravity g on the balance staff (5).

Disclosed are an integrally molded type pallet fork (incomplete) with a safety pin and a roller table that are formed with high precision by a simple process, a thin escapement governor including the pallet fork (complete) and the roller table, and a method of manufacturing the pallet fork (complete) and the roller table. The pallet fork (complete) of the escapement governor includes a pair of entry horn and exit horn extending from the rotation axis of the pallet fork (complete) toward the rotation axis of a balance with hairspring and adapted to transmit the power of an escape wheel to an impulse pin; and a safety pin which is provided in a side surface of the pallet fork (complete) between the pair of entry horn and exit horn, which extends from the rotation axis of the pallet fork (complete) toward the rotation axis of the balance with hairspring, which is situated at a position nearer to the rotation axis of the pallet fork (complete) than the pair of entry horn and exit horn, which enters a passing hollow to thereby cause the pallet fork (complete) to make normal rotation or reverse rotation with respect to the rotation axis of the pallet fork (complete), and which abuts a portion of a roller other than the passing hollow to thereby prevent erroneous rotation of the pallet fork (complete); and the roller is formed in a single layer.

Hairspring for a balance wheel/hairspring resonator, comprising n blades, where n≧2, which are fastened via at least one of their respective homologous ends and wound in spirals with an angular offset capable of neutralizing the lateral forces liable to be exerted on its central arbor when one of the ends of each blade is moved angularly around said central arbor relative to its other end.

The invention relates to a pipe flow velocity monitor which belongs to the field of fluid monitoring. The inner wall of the pipe is provided with an inner cylinder through a rib plate. The left chamber of the inner cylinder is provided a circuit board, and an end is provided with a left end cap. A left end rod, which is provided with an exciter, of a force applying rod extends out of the left end cap. A right end rod, which is sleeved by a balancing spring, of the force applying rod is arranged in a guiding hole on a baffle board, and furthermore the end of the right end rod is provided with a buffer pad. A transducer which is composed of a slide carriage and a piezoelectric vibrator is sleeved in a right chamber. The piezoelectric vibrator is obtained through binding a metal substrate and a piezoelectric wafer. An insulating pad is arranged between the adjacent piezoelectric vibrators of two transducers. The piezoelectric vibrators at two ends of the right chamber respectively contact with buffer pads on the right end rod and a right end cap. The pipe flow velocity monitor is advantageous in that a coupling function between the exciter and fluid is utilized for generating electric power and automatic measurement for the flow velocity is realized, and real-time flow velocity monitoring in the true sense can be realized; the components are configured along the length direction of the pipe, thereby realizing simple structure, small radial size, and easy required energy acquisition through multiple transducers; and the piezoelectric vibrator has advantages of reasonable structure, self-protecting function, high power generation amount and high reliability.

The invention discloses a stepping scanning torque measuring device in a magnetic-levitation bearing support structure, belonging to the measuring equipment, particularly the equipment for detecting the change of blood flow. The stepping scanning torque measuring device comprises a measuring outer cylinder, a measuring inner cylinder, a middle shaft, an upper bearing and a lower bearing. The middle shaft is arranged on the measuring inner cylinder, and the upper bearing and the lower bearing support the middle shaft. The stepping scanning torque measuring device is characterized in that: the upper bearing and the lower bearing are both magnetic-levitation bearings and are fixed on the respective bracket, a horizontal swinging rod is fixed on the middle shaft, the inner end of a balance spring is fixed on the middle shaft, the outer end the balance spring is fixed on a balance spring bracket, the periphery of a large rotating disc which is provided with a displacement detecting component on the edge is provided with a gear, the gear is meshed with a driving supporting wheel driven by a stepping motor, and the large rotating disc is supported horizontally by three supporting wheels including the driving supporting wheel. Because the upper magnetic-levitation bearing and the lower magnetic-levitation bearing are fixedly connected with the middle shaft on the measuring inner cylinder, the phenomenon that the suspension-fiber type equipment shakes in the process of measuring is eliminated, and the defect that the jewel bearings have frictional force is overcome.

Platform escapement assembly (1) comprising a balance (3) with a roller (4), a balance spring (5), and escape wheel (6) controlled by a pallet lever (7) cooperating with said roller (4).

An escapement bridge (10) comprises, on both sides of a bottom surface (11), first (20) and second (21) spacers respectively comprising first (22) and second (23) bearing surfaces for receiving first (24) and second (25) complementary surfaces of a balance cock (30) on both sides of a top surface (11A), and said top surface (11A) is more flexible in bending than said bottom surface (11), so as to allow mobility, as a result of a perpendicular force applied to said top surface (11A), of said first complementary surface (24) relative to said first bearing surface (22) when said second complementary surface (25) is locked in position on said second bearing (23) surface.

A spiral/collet assembly for a horological movement comprises a collet (1) and a spiral (3) attached by its internal end to the collet (1). The collet (1) is suitable for being mounted on a spindle (2). The external contour of the collet (1) defines stops (10a, 10b, 10c) against which the internal turn of the spiral (3) can come to bear during a shock before the elastic limit of the internal turn is exceeded. The stops (10a, 10b, 10c) are situated at respective distances (Ra, Rb, Rc) from the centre (O) of the spindle (2) that increase in the direction (D) of the spiral (3) going from inside to outside from the point (8) where the spiral (3) joins the collet (1).

A drop-catch mechanism for preventing the door leaf of an overhead door from rapidly closing upon breakage of the balancing spring thereof. The drop-catch mechanism having an input member for coupling with the balancing spring of the overhead door, a ratchet wheel for coupling with a winding axle carrying the door leaf of the overhead door, a pawl, and a positive mechanical drive for moving the pawl from a free position that allows rotation of the ratchet wheel to a catching position that blocks rotation of the ratchet wheel, the positive mechanical drive being configured such that, in use, breakage of the balancing spring coupled to the input member causes the pawl to move from the free position to the catching position.

The present invention provides a hairspring supporting structure which can adjust the offset of the hairspring from a plane to a lowest limit, a hairspring balance wheel structure and a mechanical clock. The hairspring supporting structure of mechanical clock comprises a hairspring stud height position adjusting mechanism which shifts the hairspring stud in a vertical direction relatively to a hairspring stud ring. The hairspring stud is provided with a shaft which is inserted and penetrates the hairspring stud ring and a disc-shaped flange. The hairspring stud height position adjusting mechanism is provided with a hairspring stud height position adjustor which comprises the following components: an adjusting shaft which is matched with the hairspring stud ring; and an adjustor body which is provided with a reference frustum-shaped surface which is eccentric relatively the adjusting shaft at one side of the adjusting shaft. When the hairspring stud height position adjustor rotates along a central axis of the adjusting shaft, the adjustor body presses one end edge of the disc-shaped flange of the hairspring stud thereby shifting the hairspring stud upwards or downwards relatively to the hairspring stud ring.