US2101269A

US2101269A - Remote control system

Info

Publication number: US2101269A
Application number: US743623A
Authority: US
Inventors: Pudelko Riccard
Original assignee: Landis and Gyr AG
Current assignee: Landis and Gyr AG
Priority date: 1933-09-15
Filing date: 1934-09-11
Publication date: 1937-12-07
Anticipated expiration: 1954-12-07

Description

Dec. 7, 1937. R PUDELKO 2,101,269

REMOTE CONTROL SYSTEM Filed Sept. 11, 1954 I III ltllllll Patented Dec. 7, 1937 UNITED STATES PATENT OFFICE REMOTE CONTROL SYSTEM Riccard Pudelko, Zug, Landis & Gyr, A-G., land Switzerland, assignor to a corporation of Switzer- 5 Claims.

The present invention relates to remote control systems and more particularly to a novel and improved remote control system which is operated by means of impulses transmitted over a power distribution network.

Objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom, or may be learned by practice with the invention, the same being realized and attained by means of the instrumentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts, constructions, arrangements, combinations and im-- provements herein shown and described.

The accompanying drawing, referred to here in and constituting a part hereof, illustrates one embodiment of the invention, and together with the description, serve to explain the principles of the invention. 7

In the drawing, Figure 1 is a diagrammatic view partly in perspective showing a typical embodiment of the invention, together with the circuit employed therewith;

Figure 2 is an enlarged view, from the rear or opposite side, of a portion of the relay and coopcrating parts; and

Figure 3 is a top plan view of the relay armature and cooperating parts.

The present invention has for its object the provision of a novel and improved remote control system operating on impulses transmitted over a power distribution network and which is more reliable in its operation than the systems heretofore generally used. A further object of the invention is the provision of a remote control system which is operable only upon impulses of relative long duration, andis not affected by impulses of relatively short duration which might -be caused by extraneous disturbances or might be accidentally transmitted by the transmitter. Still another object of the invention is the provision of an electrically operated remote control system in which the receiver is provided with a motor operating during the transmission of the impulse and returning to its initial position after cessation of the impulse, the motor effecting the desired function only after it has been in operation for a predetermined period of relatively long duration.

In accordance with the present embodiment of the invention, the remote control system is operatecl by impulses transmitted over conductors, such as the conductors of a distribution system. These impulses operate a relay to close a switch supplying power to a slowly operating motor which always tends to return to its initial position. Operation of the motor for a sufficient length of time operates a switch which controls any desired apparatus. Means are also provided for preventing effective operation of the motor upon its actuation by a plurality of too short impulses, or before it has been returned to its initial position following a proper operation and other means are provided for preventing injury to the mechanism by too long operation of the motor.

It will be understood that the foregoing general description and the following detailed description as well are examplary and explanatory of the invention but are not restrictive thereof.

Referring now in detail to the illustrative embodiment of the invention as shown by the accompanying drawing, the embodiment is shown as adapted for operation by impulses transmitted over a two phase system. The impulse transmitter I is in series with the pilot wire 2, and the impulses transmitted by it actuate the registering

relays

3 and 4 which are connected to one of the other wires 2 and 5 of the transmission system.

The magnet coil '1 of a relay 8 is supplied with power from wires 2 and 5 upon closure of the transmitting key 1, moving the oscillatable armature 9 from its normal position as shown against ,stop 10, where it is normally held by spring I I, so as to cause closure of the contacts l2 and 13 in series with the windings ll of a Ferraris induction motor IS. The movable contact I2 is provided with an extension 16 cooperating with a pin I l on armature 9 by which the contacts l2 and [3 are opened and closed. Alternating current of suitable voltage and frequency may be supplied to the windings 14 from any suitable source through conductors I8 and 19.

The Ferraris motor 15 is provided with a rotatable armature 20 which is secured to pinion 21 on shaft 22 and meshes with a larger gear 23 on shaft 24. Gear 23 is coupled to its shaft 24 by means of disc 25, forming with the gear 23 a friction coupling to prevent damage which might result from too long continued operation of the motor l5.

Means are provided for operating the main switch one step at a time from a motor wound spring and for this purpose an arm 21 is mounted on shaft 24, and at one end is provided with a resilient pawl 28 adapted to engage with the teeth of the ratchet 29, which as shown has only two teeth. Ratchet 29 is mounted on the rotatable switch operating shaft 30, which shaft is co-axial with shaft 24. Shaft 30 at its other end carries a switch operating cam 3| adapted to close or permit opening of the switch formed by spring mounted

contacts

32 and 33. A holding block 35, fixed to shaft 39 and cooperating with leaf spring 36 is provided for reducing the amount by which the shaft need be turned and for definnitely positioning the cam 3|. Asembodied, ratchet 29 need be moved only slightly more than by pawl 28 to effect operation of the switching cam 3|, the remainder of the cam rotation being effected by spring 36.

Means are also provided for normally resetting the motor and pawl to their initial position and for constantly urging them towards this position, these means also furnishing the poweroperating means for the switching cam 3|. As embodied, a coil spring 40 has one of its ends fastened to a rigid support while the other end is attached to a gear 4| fast on shaft 24, the spring being coiled about shaft 24 so as to be wound by operation of the motor I5. After the supply of power to motor |5 has been discontinued, spring 40 is free to cause retrograde movement of the gear 23 and arm 21, thereby rotating arm 21 to operate cam 3| and resetting the pawl 28 to its initial position in which it is ready for a further operation.

For preventing effective operation of the motor l5 by a series of too short impulses or until after the motor and pawl 28 have been returned to their initial position, means are provided for preventing locking of the motor control switch |2, 3 in circuit closing position. As embodied, a stop pin 45 is mounted on the armature 9 of relay 8 and is adapted to cooperate with a stop lever 46 pivoted at 4'! and normally held out of engagement with the stop pin 45 by means of cam 49 against the tension of spring 59. Cam 49 is mounted on shaft 5| on which is also secured the gear 52 meshing with gear 4|, so that continued operation of the motor for anybut an extremely short period of time moves cam 49 out of its normal position, permitting the stop lever 46 to be lifted by spring 59 until it is stopped by pin 53. In this position the end of lever 46 will engage stop pin 45 preventing closure of the contacts l2, l3, and thereby further operation of the motor |5 for the time being.

The operation of the apparatus is as follows:

When a short impulse occurs on the transmission line, the magnet 8 is energized and the armature 9 assumes a vertical position, thereby closing the circuit at l2, l3 through the motor [5, starting the shaft 24 counterclockwise and the shaft 5| clockwise. This would result in a very slight upward movement of the cam 49, not enough to have any appreciable effect on the locking lever 46. Immediately upon cessation of the impulse, magnet 8 is deenergized and the spring pulls the armature back to its original position against the stop l0, breaking the circuit at |2, I3, and stopping the motor 20, spring 40 returning the parts to their original position. This movement is so slight as to have no appreciable effect on member 21.

When a, succession of short impulses occurs, armature 9 would be moved at each impulse to the vertical position and would tend to return to the inoperative position of Fig. 2 as soon as the impulse ceases. However, every impulse would move cam 49 clockwise slightly and every successive impulse would move it a little more, so that the effect of the several successive impulses would be cumulative to raise cam 49, so that spring 50 would raise the long arm of locking lever 46, causing the nose 46' of lever 46 to engage with the lug 45 and hold it, so that further short,

successive impulses would have no eflect on the motor because the locking lever would thereby hold the armature 9 in the circuit-breaking position.

When, however, a long impulse comes over the line, an impulse of the type produced by 8.051181% tion of the impulse transmitter that is intended to reverse the position of member 3| and open or close the

switch

32, 33, the armature 9 instantly assumes a vertical position as before, closing the circuit l2, l3 through the'motor; the motor turns the shaft 24 counterclockwise and the shaft 5| clockwise, raising the cam 49, whereupon the nose 46' of lever 46 is positioned in the path of l-ug 45. This occurs after armature 9 has reached the circuit closing position. The motor continues its .operation, the arm 21 rotating in the neighborhood of until pawl 28 snaps over and'engages the lower tooth on member 29. After the lower tooth on member 29 has been thus engaged, any further movement of member 21 is prevented by member 21 engaging against a stop 55. If, at this time, the current is still on, and therefore the motor 2| still operating, this movement is taken care of by slipp e of the

clutch

23, 25. If the resistance oifered by the clutch is high, it may stop the motor. As soon as the long impulse ceases, magnet 8 is deenergized and the spring ll pulls the armature 9 back to the position of Fig. 2, abutment 45 pushing or camming its way past the end 46' of lever 46, against the slight tension of spring 50, thereby breaking the circuit. The circuit at l2, l3 now being broken, spring 40 turns the shaft 24 clockwise and the shaft 5| counterclockwise, causing cam 49 to depress the outer end of lever 46 and restore it to its original position. As the arm 21' is moved clockwise, pawl 28, in engagement with the lower tooth on 29, moves 29 clockwise, until 35- is past dead center, whereupon spring 36 completes the 180 reversal of cam 3|. Arm 2] contigiues its movement until stopped by abutment 5

Contacts

32 and 33 may control any desired apparatus 56 which may be supplied with power from the mains 5 and 6. Inasmuch as the apparatus 56 does not form a part of the present invention, and may be any form of signal, switch,

motor or other device, the details of its conspecification is intended to apply to impulses of the usual duration and such as might otherwise be described as momentary, while relatively long duration is intended to describe an impulse the duration of which might be measured in seconds.

The invention in its broader aspects is not limited to the specific mechanisms shown anddescribed but departures may be made therefrom within the scope of the accompanying claims without departing from the principles of the invention and without sacrificing its chief advantages.

What I claim is:

1. A remote control impulse receiving device including in combination a relay, an armature therefore, a motop-supplied with power under control of the relay, a spring for returning the motor to its normal, initial position, a main switch, a cam for controlling the main switch, a pawl and ratchet drive operated by the motor for moving the cam whereby the cam is moved only after the motor has operated for a predetermined period, and means engageable with said armature and controlled by operation of the motor, for preventing operation of the motor except from a position 01 rest.

2. In a remote control device, a device to be,

the motor switch; and a latching device for said armature, operatively connected with the motor, for holding the motor circuit open when short impulses are impressed on the relay.

3. A remote control device comprising an impulse receiving relay including an armature, a motor and motor switch controlled by the relay, spring means for moving the armature to a position (or breaking the circuit to the motor, a second switch, means for actuating said second switch, means operatively connecting the motor to said actuating means for the second switch for moving said actuating means a predetermined amount in one direction, spring means ior moving said actuating means for the second switch in the opposite direction upon breaking of the motor circuit, and a latching device, cooperating with the relay and operativeiy connected with the motor, for holding the armature in position to break the motor circuit when short impulses are impressed on the relay.

4. In a remote control device, in combination, a relay, an armature therefor, a motor, a motor switch controlled by said armature, spring means for moving the armature to a position for opening the motor circuit when the relay is deenergized; a spring operated latching lever cooperating with the armature; a spring device; tumabie means, movable in one direction by the motor and in the opposite direction by said spring device, for controlling said latching device; and switch actuating means, connected to the device to be remotely controlled, and connected to said turnabie means, for actuation thereby.

5. In a remote control device, in combination, a relay, an armature therefor, a motor, a motor switch controlled by said armature, spring means for moving the armature to a position for opening the motor circuit when the relay is deenergized; a spring operated latching lever cooperating with said armature, a switch, a spring device, means rotatable in one direction by the motor and in the opposite direction by said spring device, for actuating said switch, a friction clutch associated with said rotatable means, and means independent of the motor, for

quickly moving a portion oi the switch operating means past certain positions.

RICCARD PUDELKO.