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    • 4. 发明专利
    • Improvements in and relating to synchronous motors
    • GB235599A
    • 1926-06-17
    • GB1541925
    • 1925-06-13
    • ROBERT MICHL
    • H02K7/118
    • 235,599. Michl, R. June 13, 1924, [Convention date]. Addition to 191,313. Electric clocks. - In a motor for driving a clock comprising a permanent magnet combined with an alternating-current electromagnet as described in the parent Specification the armature passes between the pole-piece of the electromagnet and those of the permanent magnet. The armature a is a disc divided into segments rotating on a vertical shaft a provided with synchronizing pendulums p. The electromagnet e is provided with a pole-piece e projecting under the armature, and the permanent magnet, which is formed of two bar magnets m, m connected at the top by an iron plate i, with two pole-pieces N, S above the armature. The motor is started by means of a cam 3 engaging with a lever 1 carrying a pawl 2 which engages with a ratchet 7 on the shaft a . The pawl 2 has a tail-piece 2' which is attached to a tension spring 5 and abuts against a stop 6, so that on turning the cam 3 by means of a handle 4 the pawl 2 slips over the ratchet 7 and is afterwards returned by the spring 5, thus starting the motor.
    • 5. 发明专利
    • Improvements in and relating to synchronous motors for the electric drive of clockworks
    • GB191313A
    • 1923-01-11
    • GB700822
    • 1922-03-09
    • ROBERT MICHL
    • G04C15/00
    • 191,313. Michl, R. March 9, 1922. Electric clocks.-A synchronous electric motor for driving clockwork from alternating-current mains comprises a rotor having soft iron segments c , Figs. 1 and 2, rotating in front of the poles N, S of a permanent magnet b and one pole e of an alternating-current electromagnet f, the movement being transmitted to the clockwork h by means of gearing, for example, worm gearing g. In a modification, Figs. 3 and 4, two alternating-current electromagnets e are employed with two rows of segments c and an electromagnet b of constant polarity having pole-shoes b extending to the faces of each rotor. In another construction, shown in Figs. 9 and 10, the rotor is in the form of a segmental disc c and the poleshoes b of the permanent magnet b alternate with the pole-shoes e , e of the alternating-current magnet e. The pole-shoe e is connected to the top of the core e by the bow i, and the permanent magnet b is insulated from the electromagnet and supported by means of the plates k and screws l. To start the motor, a hand-operated toothed segment n is turned, thus tensioning the spring o, which on the release of the handle returns the segment n and drives a cog-wheel m mounted on the shaft d of the rotor c.
    • 8. 发明专利
    • Improvements in electromagnetic escapements for clock mechanisms
    • GB358673A
    • 1931-10-15
    • GB2645730
    • 1930-09-04
    • ROBERT MICHL
    • G04C5/00
    • 358,673. Clocks. MICHL, R., 6, Ederova Ulica, Elektrana, Czecho-Slovakia. Sept. 4, 1930, No. 26457. Convention date, Sept. 4, 1929. [Class 139.] Escapements; winding - apparatuts, electric.-In an escapement for clock mechanism, the running down of the clock train under the drive of the mainspring or weight is checked by means of a synchronous electrical machine or an A.C. inductor, in place of a mechanical escapement. To allow, however, for current interruptions the device is combined with a mechanical escapement which is only released when the current fails. The shaft b of the clock train (which includes a mainspring or weight) carries rigid with it the hub and axis f of a wheel e between wheels c, d which are loose on shaft b ; wheel i being rigid with wheel d. Wheel i is geared through worm h to the shaft of a rotor g of the synchronous machine, t being the stator winding. The motor may be of the kind set out in Specification 191,313, [Class 139, Watches &c.]. When current is flowing, a coil u holds a brake off the disc g, and rotating balls ware raised to depress a sleeve w . This rocks a lever k, counterweighted at k , clockwise about its pivot k so that a pawl p on this lever locks the pin m on a pendulum m for an escape wheel n rigid with wheel c. This locks wheel c. With the machine running at synchronous speed the mainspring or weight drives the shaft b at a constant speed, the tendency of the mainspring to speed up shaft b being checked by the counter action of disc g and balls w. When the current fails, coil u is deenergized and the brake arrests disc g, so that the mainspring cannot speed up the disc g. At the same time balls w fall, sleeve w and lever k rise, and pawl p releases the pendulum so that the mechanical escapement assumes control of the shaft b. Pawl p is prevented from clockwise rotation by pin p on lever k. Where a Ferraris motor is used to keep the mainspring wound up, the coil s thereof may be tapped to supply the current for coils t, u.
    • 9. 发明专利
    • Speed regulator for power engines
    • GB234514A
    • 1926-10-22
    • GB1345325
    • 1925-05-22
    • ROBERT MICHL
    • G04C15/00
    • 234,514. Michl, R. May 26, 1924, [Convention date]. Dynamos, regulating. - An engine driving a generator for clockwork installations is controlled by a centrifugal governor, and fine adjustments of its speed are obtained by a differential governor the bevel c of which is driven by a standard d by a motor g dependent upon the frequency of the generator, the movements of the differential causing rotation of the shaft b to complete a circuit through the contacts p or p . A roller on the rod o is held by a spring t in a recess s' in the disc s on the shaft b. The roller is forced out of the recess and lies on the periphery of the disc when the shaft rotates beyond the point at which contact is effected. Electromagnets z or z are energized by the closing of the circuit which is periodically closed and opened by lugs l on the shaft b engaging a spring contact l . The lugs l are tapered so that duration of contact may be varied. The electromagnets control a reversible motor a which actuates through worm gearing a serew-threaded spindle 31 engaging one end of the lever 32 through which the valve spindle 32 of the engine is operated by the centrifugal governor a . The centrifugal device w keeps the switch p , o closed only when the motor g is running and the constant-speed clockwork motor m may be stopped by the lever m when the motor g stops. A contact device in the clockwork mechanism may, when the latter stops, cause the motor g to stop. In a modified switch for the electromagnet circuit, insulated contact plates v, v , Fig. 3, on a member pivoted to the rod o which is in frictional contact with the disc s close contacts p , p or p , p . The Specification as open to inspection under Sect. 91 (3) (a), comprises also a further modification of the switch in which the contact spring o, Fig. 6 (Cancelled) is clamped non-rigidly to the shaft b to allow the latter to rotate past the point at which contact occurs. This subjectmatter does not appear in the Specification as accepted.