US1744620A - Teledynamic control apparatus - Google Patents

Description

1930. A. D. G. DELALANDE TELEDYNAMIC CONTROL APPARATUS 2 Sheets-Sheet Filed Nov. 30, 1925 Jan. 21, 1930. A. D. G. DELALANDE 1,744,620

TELEDYNAMIC CONTROL APPARATUS Filed Nov. 30. 1925 2 Sheets-Sheet 2 Patented Jan. 21, 1930 UNETE STATES PATET QFFICE ANDRE DESIRE oneness DELALANDE, on PAR-ES, FRANCE, ASSIGNOR on ONE-HALF T0 COMPAGNIE "Bonn LA FABRICATION DES COMPTEURS ET MATERIAL DUSINES A GAZ, OF MONTROUGE, SEINE, FRANCE, A LIMITED LIABILITY COMPANY, AND oNn HALF T0 LAGTION A DISTANCE, or PARIS, FRANCE TELEDYNAMIC CONTROL APPARATUS Application filed November 30, 1925, Serial No. 72,419, and in France July 10, 1925.

This invention, for which I have applied for Letters Patent in France dated July 10, 1925, No. 2061M with an application for a patent of addition dated September 16, 1925, No. 20286 relates to a device more particularly intended for solving problems involving the remote control of mechanisms, which arise in connection with the exploitation of electrical power stations (variable tariff, lighting and extinction from a distance and the like), which problems may present themselves under the following conditions:

A certain number of circuit breakers may be installed in the houses of consumers, other circuit breakers may be utilized for lighting and extinguishing thelamps intended for street illumination or for any other purpose. The problem is to enable any one of said circuit breakers or a definite group of circuit breakers) to be opened and closed as desired, from the central stat-ion and utilizing only two conductors, with the possibility of repeating this operation, if desired without acting, even temporarily upon the other circuitbreakers.

In a more general manner, the device forming the subject of the present invention is applicable in all cases where it is required to obtain a selective action in the operations which are to be carried out at a plurality of receiving stations and where the electric connection between said receiving stations and the transmitting station only comprises two conductors, or again when this connection is effected by Hertzian waves.

In the following description however, there is merely described by way of example, the manner in which the invention can be carried out in practice when it is applied in the circumstances defined above to the remote control of a certain number of circuit breakers.

The difierent figures show respectively in a diagrammatic manner:

Fig. 1 the transmitting station as a whole.

Figs. 2 and 3 show a receiving station as a whole in plan and in elevation.

Figs. 4, 5 and 6 show details of a receiver.

The transmitting device shown in Fig. 1 comprises the following parts.

1 is the armature of a constant speed motor which, through the intermediary of a worm 2, drives a worm-wheel 3. The shaft 4 of this latter wheel drives cams 0 c and so on, the number of which is equal to the number of different apparatus to be controlled. Upon this shaft there is also mounted a cam 5 which constitutes, with the brush 6, a rotary circuit breaker which is utilized in order to automatically stop the armature 1 each time the shaft at has made a revolution; 7 represents the field coil which acts upon the armature 1; 8 and 9 represent respectively the field coil and the armature of an A. C. generator which provides the current necessary to actuate the receivers.

The armature 9 is connected across the two leads 10 and 11 which are provided or the purpose of effecting remote control.

Each cam such as 0 c has a certain nuinber of projections; 1 1 are levers which control the pivoting movement of tl e mercury switches (4 a N, b are push buttons provided for the various operations necessary: 0 e are electromagnets which when excite-d, close the contacts m n n m and so on.

In order to carry out an operation, for example that corresponding to the cam 0 pressure is exerted upon the button If, this operation sends a current through the electro- On the other hand,the closing of the contact if enables the switch a successively to breakthe circuit and to send to the exciting coil 8 current impulses which are regulated in accordance with the profile of the cam 0 In the case shown in Fig. 1, two short impulses will occur followed by a final long impulse.

hen the shaft 4 has made one revolution, the contact between the brush 6 and the cam 5 is broken; the circuit of the. electromagnet 0 is broken, the contacts m and n being under the action of return springs, open, and the armature of the motor, being no longer traversed by the current, stops.

The device has thus returned to its original position and is ready to come into action again.

The receiving device shown in Figs. 2, 3 and 4 comprises the following parts.

Two electromagnets and 66 connected across the lines 10 and 11, (see Fig. 1) act by induction on a. conducting disc 12 so as to pro duce a driving torque thereon. Two capacities 67 and 6-8 are inserted in the respective circuits of the electromagnets G5 and 66 so as to produce at the signalling current frequency a phase displacement angle of asnear 90 as possible between the fluxes of said electromagnets in order that the driving torque exerted on the disc 12 shall be the maximum obtainable.

The conducting; disc 12 is elastically connected to a shaft 13 as by a spring member 14.

Upon the shaft. 13 there is mounted a pinion15 which meshes with another pinion 16 mounted upon the shaft 17. A spiral spring 18 fixed to the shaft 17 by one of its extremities and by its other extremity to a stationary portion19 of the apparatus, holds the device at rest through the intermediary of an abutment 2O fixed to the pinion 16 and bearing against the fixed member 19.

A member 21 fixed: to the shaft 17 carries a shaft 22. A ratchet wheel 23, having for example ten teeth, (this number however could could be varied as desired) is fixed upon the shaft 22. The ratchet wheel 23 (Fig. 4) carries a finger 24 which strikes against the member 25 which is movable about an axis 26, the member 25 itself abutting against fingers 27 or 28 fixed upon the member 21, according to the direction of rotation of the ratchet wheel 23.

The distance apart of the fingers 27 and 28 is adjusted in such a manner that the ratchet wheel can make a complete revolution.

A pawlmounted on the members 21 and29= held in engagement with theratchet wheel 23 by a spring 30 serves as a retaining pawl. The pawl 29 carries a finger 31.

A member 36 fixed upon the shaft 22 carries two pointers 37 and 38, which are arranged diametrically opposite each other and the positions of which are controlled by the number of short signals emitted. A helical spring 39 fixed by one of its extremities to the shaft 22 and by the other extremity to the member 21 presses the ratchet wheel through the intermediary of the finger 24 against the member 25 which itself bears against the finger 27 when the retaining pawl 29 is raised. v i

A sleeve 32 is mounted with very slight friction upon the shaft 13 and is provided with a groove whicn enables it to turn upon this shaft through an angle which is limited by a pin 34 fixed in the shaft 13. The sleeve 32 carries a finger 33.

A helical spring 35, having one of its ends fixed to the sleeve 32 and its other end to the shaft 13,v normally presses the sleeve 32 against the pin 34 so that the finger 33 acts in the same manner as a pawl with respect to the ratchet wheel 23.

40 is a fixed incline which raises the finger 31- when the movable apparatus reaches the end of its stroke.

41- is a member comprising two inclines63 fixed to a lever 64 which is movable abouta shaft 42 upon which is mounted a mercury switch 43.

hen at rest the movable members occupy the positions shown in Fig. 3.

Under the action of a driving couple, the disc 12 turns in a clockwise direction and drives the pinion 16 in the opposite direction, the finger 33 engages the tooth a of the ratchet wheel 23 and causes this wheel to move forward to the extent of one tooth, while the pawl 29 prevents the wheel from returning rearwardly under the efiect of thespring 39. The arrows in Fig. 3 show the directions of rotation of the various operating members.

A short current impulse causes a. short movement, the minimum of which corresponds to the angle through which the disc 12 or the-pinion 16 must turn in order that the finger 33can cause the ratchet wheel 23 to rotate to the extent of one tooth. The maximum short movement corresponds to the angle through which the disc 12 or the pinion 16 can rotate without one of the fingers 37 or 38 coming into engagement with the member 41.

When the first short impulse ceases the disc moves back under the action of the spring 18 A and the ratchet wheel 23 raises the finger 33 which then escapes and returns to its original position while the abutment 20 comes into engagement with the fixed member 19;

On the occasion of the second short impulse, the finger 33 engages the tooth b of the ratchet wheel 23; in the same way it causes the wheel to advance by one tooth and the movable mechanism, with the exception of the ratchet wheel, returns to its original position.

On the occasion of the third movement of the disc, the finger 33 engages the tooth c'of the ratchet Wheel 23 and causes this latter wheel to advance by one tooth. In this position, the finger 37, supported by the member 36 is located along the diameter 17 22 and directed towards the exterior of the wheel 16, as the current impulse is long, the disc continues to rotate, taking with it the pinion 16 (Fig. 5) and the finger 37 engages the member 41 and causes it to swing about the shaft 42. The bulb 43 fixed to the shaft 42 also oscillates in its turn and closes the circuit between its two electrodes.

As the long impulse continues, the finger 31 carried by the pawl 29 is raised by the fixed incline 40 and the ratchet wheel returns to the original position, which it occupied before the first short impulse, under the action of the spring 39; the finger 24 abuts against the member 25 which, itself, is in engagement with the finger 27.

The movement continues until the abutment 20 encounters the fixed member 19. The driving couple exerted upon the disc can continue during a certain time without inconvenience. lVhen it stops, once the long impulse is finished, the whole of the movable system moves back and, when the finger 31 leaves the incline 40, the pawl 29 is once more pressed against the ratchet wheel 23 by the spring 30.

If instead of causing two short movements and one long movement to take place, seven short movements and one long movement had been effected the finger 38 which is diametrically opposite the finger 37, would have engaged the member 41 and would have opened the circuit between the two electrodes of the mercury bulb 43.

Nhen, after a number of short impulses other than 2 and 7, a long impulse is produced, it will be seen, (Fig. 6) that, the fingers 37 and 38 not being upon the diameter 17, 22, cannot engage the member 41.

It will thus be seen that it is possible to effect ten different operations corresponding to the opening and closing of five circuit breakers with five receivers, the switch actuating members of which, such as the fingers 37 and 38 of the receiver already described, would be located respectively so as to operate suitably for O and 5, 1 and 6, 2 and 7, 3 and 8, 4 and 9, short impulses.

The speed of the driving disc is regulated by an escapement not shown in the drawings; the same result could moreover be obtained by means of a brake acting under centrifugal force of the kind used in automatic telephone calling apparatus. In order to maintain the speed as constant as possible, a driving couple may be maintained which is practically constant, even when the elements which create it vary in value, by utilizing more particularly in the induction devices, magnetic leakage and saturation apparatus.

Instead of utilizing two conductors for the transmission of impulses, a single conductor and the earth could be utilized as described in French Patent No. 557114 of February 2, 1922, and in the additions thereto.

Finally, the conductors connecting the transmitter to the receivers could be dispensed with and Hertzian waves could be utilized.

In this case the transmitting station generates impulses of high frequency current of short or long duration.

The devices described above furthermore present the following advantages:

The utilization at each receiving station of a small induction motor which can rotate a considerable time, that is to say during several seconds considerably diminishes the power absorbed by each station, in particular as compared with the power which would be absorbed by a teledynamic control actuated by an electromagnet acting instantaneously.

Finally, since it is possible to make the.

ratio between the durations of a long impulse and a short impulse as great as may be desired, the operation of the teledynamic control device as described remains reliable even in cases where the tension is subject to great variations.

I claim:

1. Circuit selector operated by electrical impulses comprising, in combination, a switch controlling a local circuit, a switch actuating member, a bracket member carrying said switch actuator, means responsive to current impulses for effecting displacement of said bracket proportional to the duration of said impulses, said switch actuator normally being so angularly positioned relative to said bracket as to clear said switch for any displacement of said bracket, and means, actuated through the displacement of said bracket under said impulse responsive means, for rotating said switch actuator relative to said bracket through a constant angle for each current impulse whereby said switch actuatoris brought, after 'a given number of short current impulses, into a predetermined angular position relative to said bracket in which it will engage said switch when carried bodily by said bracket past the switch on the occurrence of a long current impulse.

2. Circuit selector operated by electric current impulses of varying duration, comprising, in combination, a switch controlling a local circuit, a switch actuating member, a bracket member located in spaced relation to said switch, and on which said switch actuator is rotatably mounted, means responsive to current impulses for rotating said bracket through an angle proportional to the duration of said impulses, said switch actuator being normally so angularly positioned with respect to said bracket as to clear said switch for any rotation of said bracket, restoringmeans for returning said bracket to its original position at the end of each impulse, means switch actuator relative to said bracket actuated through the rotation in one direction of said bracket, for rotating said switch actuator relative to said bracket through a constant angle at each current impulse and -means for preventing rotation of said switch bracket member located in spaced relation to said switch, and on which said switch actuator is rotatably mounted, means respon sive to current impulses for rotating said bracket through an angle proportional to the duration of said impulses, said switchv actuator being. normally so angularly positioned with respect to said bracket as to clear said switch for any rotation of said bracket, restoring means for returning said bracket to its original position at the end of each impulse, means a'ctuated through the rotation in one direction of said bracket, for rotating said through a constant angle atleach currentimpulse,.means for preventing: rotation of said switch actuator relative. to said bracket in the opposite direction, said switch actuator after a predetermined number. of short current impulses being brought intorsuchangular position relative to. said bracket as to engage said switch when carried bodily by said bracket past said switch on the occurrence of a long current impulse, and nieansoperative on a long rotation of said bracket for returning said switch actuator to its original angular position relative to said bracket.

4. Circuit selector operated by electrical impulses of varying duration comprising, in combination, a switch controlling. a local circuit, a disc means responsive to current impulses for rotatingsaid disc through an. angle proportional tothe duration of said impulses, a bracket member located in spaced relation to said. switch and rotated by said disc towards said switch, a shaft carried by said bracket but rotatable with respect thereto, a switch actuator carried by said shaftand normally so posit-ionedrel-ative to said bracket as to clear said switch as said bracket is rotated, a toothed wheel fixedly mounted on said shaft, and means adapted to engage with said toothed wheel as said shaft is displaced with said bracket and to rotate said wheel through one tooth at each current impulse, whereby said switch actuator is moved step by step into such angular position relative to said bracket after a predetermined number ofmined angular short current impulses as to be'carried by said bracket into engagement with said switch on the next long current impulse.

5 Circuit selector operated by electrical impulses of varying duration comprising, in combination, a switch controlling a local circuit, a disc, means responsive to current impulses for rotating said disc through an angle proportional to the duration of said impulses, a bracket member located in spaced relation to said switch and rotated by said disc towards said switch, a shaft carried by said bracket but rotatable with respect thereto, a switch actuator carried bysaid shaft and normally so positioned relative to said bracket as to clear said switch as said bracket is rotated, a ratchet wheel fixedly mounted on said shaft, a pawl pivoted to said bracket and engaging with said ratchet wheel, means adapted to engage with said ratchet wheel as said shaft is swung with said bracket for rotating said wheel through one tooth at each current impulse whereby said switch actuator is moved step by step into such angular position relative to said bracket after a predetermined number of short current impulses as to be carried. by said bracket into engagement with said switch on the nextlong current impulse, means with which said pawl is brought into engagement on the occurrence of a long swing of said bracket for releasing said pawl from said ratchet wheel, and a spring, operative on. the release of said pawl, for rotating said shaft and switch actuator back to a predeterposition relative to said bracket. i

6. Circuit selector operated by electrical impulses of varying duration comprising, in combination, a switch controlling a local circuit, a disc, means'responsive to current impulses for rotating said disc through an an gle proportional to the durations of said impulses, restoring means for returning said disc to its original position at the end of each current impulse, a shaft rotated from said disc, a bracket member fixedly mount-edon said shaft for rotating therewith past said switch, a second shaft supported by said bracket, but rotatable with respect thereto, a switch actuator mounted on said shaft and so set with respect to said bracket as normally. to. clear'said switch as said bracket is rotated past the same, a ratchet wheel fixedly mounted on said second shaft, a retaining pawl pivoted to said bracket and engaging with said ratchet wheel, a-third shaft on which said disc-is mounted, a sleeve carried by said third shaft, flexible coupling means between said third shaft and sleeve, a pin carried by and rotating with said sleeve, said pin engaging with said ratchet wheel as said second shaft is swung. with said bracket and rotating said ratchet wheel through one teeth at each current impulse whereby said'switch actuator is steppedinto such angular position relative to said bracket after a predetermined number of short current impulses as to be carried by said bracket into engagement with said switch on the next succeeding long current impulse, a fixed abutment member with which said pawl is brought into engagement on a long swing of said bracket and is released thereby from said ratchet wheel, and a s ring, operative on the release of said pawl, or rotating said second shaft and switch actuator back to a predetermined angular position relative to said bracket.

ANDRE DESIRE GEORGES DELALANDE.

Images