CH173457A - Electric pendulum motor device. - Google Patents

Description

Electric pendulum motor device.

In electric pendulums, the first balance of which activates the timer by means of a switch and carries a magnet subjected to the periodic action of a solenoid periodically excited by the current. embracing the region close to its vertical position, it is necessary, so that the march of the pendulum is regular, that the periodic impulse given to the magnet by the solenoid is always of the same value whatever the amplitude of the oscillations of the pendulum.

These conditions are difficult to achieve, if not impossible. achieve by the application of known switches, and the. The purpose of the present invention is to obtain regular running of such a pendulum.

The motor device according to the present invention is distinguished from known devices in that the switch comprises three elements, two of which are carried by the first balance with which they oscillate, the first third element being able to move relative to the first two under 1 action of these when the first ba-

lance sorrel and being carried by a rotary member in engagement with the timer of the clock, the third element and one of those carried by the pendulum being electricity conductors, while the second element carried by the pendulum is insulating, the first arrangement is such that, during the oscillations of the balance wheel, the first two elements periodically aetion the third si6me which, by moving with respect to eix, periodically comes into contact with one. then with the other, and travels a path of contact on one, then on the other, while the pendulum describes in one direction, respectively in the other, the above angle, the straight line connecting the third element at the point of rotation of the member which carries it having such an inclination to the vertical and on the contact paths that the latter are suffi ciently long for their ends to be easily determinable during the construction of the pendulum, the third element being completely abandoned by the first two as soon as the paths of contact are

traveled and the balance completes each oscillation at said angle.

One form of execution of the device according to the present invention is represented, diagrammatically and by way of example, in the appended drawing, in which: FIG. 1 and 2 show, in front views, respectively from the side, the device and the main organs of a clock to which it is applied; Fig. 3 and 4 show, on a larger scale, various positions occupied by the elements of the switch during the operation thereof; Fig. 5 represents the dielectric circuit of the pendulum.

The pendulum represented comprises a balance rod 1 suspended at 2 and carrying at its lower end a curved permanent magnet 3 subjected to the action of a solenoid forming a feed-in coil 4; the suspension point of the pendulum, the coil and all the other organs of the pendulum mechanism are carried by a frame with plates 5 fixed behind the dial 6 of the pendulum.

The switch is placed near the point of suspension of the balance wheel and two of its -elements-> are formed by two Plates 7 and 8 fitted inside a frame 9 fixed to the rod 1 of the balance wheel laterally to that -this; These two plates pres--ni-ent each a rectilinear parallel ä röte. that of 1'autre and between which is menag @ a free space forming pleassière lang .de which can: d.eplace wie rod 10 perpendicular to Plates 7 and 8 and constituting the first third element.

The rod 10 is fixed at the end of a lever 11 constituting the rotary member, pivots at 12 and carrying at its other end a pawl 13 in engagement with a wheel 14 of the timer; rette wheel is also engaged with a retaining pawl 15, and These. two ei i quets are maintained in engagement with the wheel by their own weight, an engagement which could also be reinforced by springs.

The lever 11 is integral with a pulley 17 also pivots at 12, and this lever, with all the organs it carries, is balanced in such a way

that a thin flexible rod 16, engaged dass the throat, the pauke and playing the 1st role of brake, the 1st maintains it immobile in any Position as soon as no aetion is exerted on it.

Plate 7 and PAIement 10 are conductors of electricity, silver for example, while Plate 8 is insulating; the first balance is isolated -from the mass at 19 by two washers and an insulating sleeve.

The width of the pleat is slightly greater than the thickness of the upper 10, so that the latter can be located in the pleat without touching its sides.

A battery 20 constitutes the source of electric current, and it is connected, on the one hand, to the suspension of the pendulum and, on the other hand, to one of the ends of the winding of the coil 4, the other end of which is connected to ground; the cell-coil circuit is therefore closed, and the coil energized, only when the rod 10 which is grounded is in contact with the conductive plate 7 which, connected to the balance, is also grounded. The source of current could be constituted by something other than an island.

The operation of this form of execution is the following: When the pendulum is stopped, its pendulum is in the vertical position shown fixed. 1 and the rod does not touch the edges of the pleat e; the electrical circuit is open and the coil has no action on the magnet.

To start the clock, it suffices to give the pendulum an impulse and, as soon as it oscillates, from -auch-- to the right as shown in the fix. 3 in solid lines, the rod 10 comes into contact with the conductive pin 7 of the pleating, closes the electrical circuit and the energized downstream coil attracts the magnet until the rod 10, sliding on this road, reaches its upper extremity and abandons it, as shown by the dotted lines of fix. 3; from that moment, the circuit is cut, the engulfing coil no longer has any action on the magnet and the balance completes its ascillation under the impulse received to reach its extreme position. During this oscillation from Bauche to the right, the rocker arm drives the lever 11 by moving from right to Bauche the pawl 13 which advances the wheel 14 by one tooth; as soon as the conductive side 7 of the slide has abandoned the rod 10, the lever 11 is completely free and is maintained in the position shown in dotted lines in FIG. 3 by 1e f reff n 16, and ä. at this time the retaining latch 15 comes into action and prevents the wheel 14 from rolling back.

The pendulum then performs the reverse oscillation, from right to Bauche, the insulating side 8 I the slide meets there. rod 10 and the drive as shown in the solid lines of FIG. 4, until the pawl 13, moved from Bauche to the right, reaches the Position shown in dotted lines in FIG. 4 and engages in the next tooth of the. roller 14; at this moment, the rod 10 is abandoned by the slide, the lever 11 is maintained in this position by the brake 16, and the balance, continuing its oscillation, reaches the extreme position.

During this oscillation from right to left, the circuit remains broken and the coil exerts no action on the magnet. <B>Im</B> the pendulum then returns from Bauche to the right, the driving head 7 of the slide again encounters the rod 10 as shown in FIG. 3, and the 1st cycle of functions starts again.

The length of each of the sides of the slide and their position with respect to one another and with respect to the third element 10 are such that the pawl can only advance the roller 14 by one tooth for each double oscillation of the pendulum; but the construction and arrangement of the various organs could be such that this advancement requires more than one tooth.

As the drawing shows, the switch is arranged laterally. rod of the balance and the lever 11 is pivoted close to the vertical passing through the point of suspension of the rod; it follows that this lever has on the vertical and on the contact paths of the switch an inclination (approximately 25) such

that these contact paths are long enough for their extremities to be easily determinable during the construction of the clock; the first electric circuit is thus closed when the first pendulum travels in one direction at a constant angle embras: sant the region neighboring its vertical position, and the pulse given periodically to the magnet by the coil is of constant value, .con Necessary and essential edition for the regular running of the clock.

The same favorable result could be obtained by arranging the slide 7, 8 directly on the rod 1, and by moving the first pivot point 12 of the lever from the vertical on the other side of this vertical.

It would no longer be the same if, the slide being placed directly on the rod, the pivot point of the lever Aait on or near said vertical; .in this case, the paths of contacts would be too short so that their extremities are easily @determin.able during the contraction of the pendulum.

If the pendulum is disturbed in its running, by a shock, for example, it is very rare, if not impossible, for the pendulum to remain perfectly immobile in the vertical position shown in FIG. 1 and in which rod 10 is just in the middle of the slide without touching the sides, circuit sofft or green; on the contrary, after this disturbance, the balance will almost always perform oscillations of very low amplitude perhaps, but still sufficient for the sides of the slide to abut alternately and briefly against the rod 10; The circuit will be closed for very brief moments, but sufficient, however, for the very brief impulses communicated by the coil to the magnet to gradually increase the amplitude of the oscillations and gradually bring the balance back into normal operation.

The upper part of the conductive plate 7 is surmounted by an insulating part 18 which prevents the rod 10 from coming on untimely, except for the action of some abnormal cause.

conch, in contaet with, this Upper Part Read of 7 and close the 1st circuit inopportunely.

The motor device of crit has, over .dispositifs .knowns, advantages among which one can cite the following: between, two elements which, as long as Bure the, contact, are placed 1'un compared to 1'autre; this results in reciprocal friction, the inevitable consequence of which is periodic cleaning and polishing of the surfaces in contact and proper closure of the ciruit by these surfaces; moreover, since it is during circuit closure that the pawl advances the wheel 14, the resistance offered by the minuter in advance contributes to increasing the pressure between the rod 10 and the conductive side. 7 of the slide and consequently the quality of the contact; this is of great importance, given the low voltage of the electricity source generally used; automatic restarting of the clock and without strange intervention, when the clock has example as explained above; However, the absence of current, resulting from any kind of sause, would cause the clock to stop; the clock can be operated by a simple battery placed inside good cabinet; thus avoiding the installation of conductive threads outside the clock and the latter, which is then completely independent of all external organs, good cabinet, can be placed anywhere else where desired; deletion cleaning and maintenance of the switch contact devices, the latter also being unadjustable; the mechanism of the clock itself being able to be very simple, maintenance can be reduced practically to the only replacement of the the island; this can last for several years, the high ohmic resistance of the pickup coil reducing the intensity of the current to a very low fraction of an ampere; moreover, the fact that the circuit is interrupted at the moment when the force

electromotive creel generated by the rapid passage of the magnet in the coil is maximum, eliminates the sparks of rupture; the switch is placed very close to the point of suspension of the pendulum, so that the latter has a very large lever arm to operate the switch easily and activate the timer without being disturbed in the regularity of its oscillations; the weight of the magnet, which can be very high, also contributes to maintaining this regularity; the driving force of the magnet-coil system comes into play, under the action of the switch, at the times and during the time necessary to compensate for the retarding forces acting on the balance, that is to say when .of the passalte of this one in the region neighboring the vertical, and @ that whatever the amplitude of the oscillations; the result is a very regular mat'ehe of the pendulum which, for small alterations, can be adjusted by a graduated knob adapted to the pendulum in the known way; simple, precise and robust construction; the pendulum can be transported without risk by attaching the pendulum in its extreme position of swallowing the magnet by the coil, the position at which the circuit is open; silent walk.

The motor device according to 1a present in venti.on can differ from the form of exkution described, as also be applied to a pendulum other than that shown in the drawing, this pen, dule being able to actuate a device of re clamps; for example, the sides of the glissike could be curved instead of being straight and the frame supporting them could have a shape other than that shown in Jessin; etc

Claims (5)

CLAIM Electric pendulum motor device adopts the first pendulum actuates the timer by means of a member, the switch and carries a magnet subjected to the periodic action of -Lm solenoid excited p-rio-dically by the first current While the first pendulum describes an angle embracing the region close to its vertical position, 4ispositif, characterized in that the in- switch comprises three elements: two are carried by the balance wheel with which they oscillate, the third element being able to be placed in relation to the first two under the action of them when the balance wheel oscillates and being carried by a rotating body in engagement with the timer of the clock, the third element and one of those Carried by the pendulum being conductors of the electricity, while the second element Carried by the pendulum is insulating, the whole arranged in such a way that , during the oscillations of the pendulum, the two first elements periodically aerate the third which, by moving relative to them, periodically comes into contact with one, then with the other, and through a short path of contact on one then on the other. inclination such on the vertical and on the contact paths that the latter are long enough for their ends to dry easily determinable during the construction of the pendulum, the first third element being completely abandoned by the first two as soon as the paths of the contacts are traversed and that the balance completes each oscillation outside of said angle, for the purpose that the periodic impulse given to the magnet by the solenoid is always of the same value whatever the amplitude of the oscillations of the balance , and to obtain a regular running of the pendulum. SUBCLAIMS ONS 1 Device according to claim, characterized in that the conductive element carried by the first balance has a contact surface on which is applied the first three siAme element when the first electrical circuit is closed, and the first Ion- of which this third element moves during the closing of the circuit and carried out by the first friction resulting in a periodic scanning of this surface, which has the effect of maintaining this surface in perfect condition , cleanliness and to achieve good electrical circuit closing contact. 2 Device according to claim, character ris6 in that the two elements Doors by the first rocker are shaped @ Plates each having a side by which the first troi.sieme element comes into .contact and is actuated. 3 Device according to the vendkation, character ris6 in that the .two -elements Doors by the first pendulum are fixed to the interior .of a frame adjusted to the pendulum. 4 Device according to claim, character ris6 in that the two elements Doors by the first rocker constitute two sides of a slide periodically actuating the first third element by first sliding the first along this slide. 5 Device according to claim 1 and sub-claim 4, characterized in that the slide is sufficiently wide so that the third element can slide therein being in contact with one of the sides only. G Device according to claim, earact ris6 by a fixed insulating member, to the conductive element carried by the first balance, this insulating member preventing any inadvertent closing of the electrical circuit. 7 Device according to claim, c9, ract rise in that the two door elements by the first rocker are fixed to the latter ei later ralement to its rod and on the same side of it. 8 Device according to claim and sub-claim 7, characterized in that the rotary member carrying the first third element is pivoted close to the vertical Not sant by the first point of suspension of the steel balance, so that the contact paths are long enough for their extremities to be easily determined. 9 Device according to the revenieation, earaete ris6 in ee that the two port elements, & s by the first b.alaneier are fixed at the top of the stem of this one ei near its point @de suspension. 1.0 Device according to claim, earacte risA in that the organ which carries the first three third, element is a lever carrying at one of its ends <B>co</B> third element let having its other end in engagement with the timer. 11 Device according to claim and sub-claim 10, as shown in the accompanying drawing. 2 Device according to 1a claim, earactE ris6 in that the two elements of 1'inter rupteur Doors by the first pendulum are fixed to the latter very close to its rod. 13 Device according to claim 12 and sub-claim 12, characterized in that the rotary member carrying the third element is pivoted laterally to the vertical passing through the point of suspension of the pendulum and at a distance from this vertical such that the contact paths are long enough for their ends to be easily determined.