US1380663A - Wireless control device - Google Patents

Description

' J. LINDGREN.

WIRELESS CONTROL DEVICE.

APPLICATION FILED MAY is, 1918.

Patented June 7, 1921.

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J. LINDGREN.

' WIRELESS CONTROL DEVICE.

APPLICATIO N FILED MAYI6,.I9I8.

Patented June 7, 1921.

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5% WM m \m I w. m M f i \k Q N m R I \m N. m M. K M mm A NW J. LINDGREN.

WIRELESS CONTROL DEVICE.

APPLICATION FILED MAY 16. 1918.

Patented J 11110 7, 1921.

3 SHEETSSHEET 3.

' rated by comparativel PATENT OFFICE.

JOHN LINDG'REN, 0F LEMONT, ILLINOISI WIRELESS CONTROL nnvron.

Application filed May, 16,

-tion.

The object ofv my invention is to provide electric means for synchronizing the movement of an armature located at a distance with the movement of an engine located at a control station. Another object of my invention is to provide wireless means for energizing at will, separately or collectively, one or several magnets at a receiving station through the operation of switches at a send-. ing station.

In the drawings Figure 1 is a side-elevation of the novel instrument used by me at the sending station, with connections and other accessories indicated by diagram; Fig. 2 is an end-elevation of the novel instrument shown in Fig. 1; Fig. 3 is a side-elevation of the novel instrument used by me at the receiving station, with connections and other accessories indicated by diagram; Fig. 4 is an end-elevation of the novel instrument shown in Fig. 3; and Fig. 5 is a dia grammatic view illustrating how some of the elements shown in Figs.- 1 to 4 may be used in connection with a wire connection between the sending or control station and the receiving station, for the purpose of synchronizing the movement of an armature at the receiving station with the movement of an engine at the sending or control station. 7

Referring to the drawings, at the send-- ing station'there is located a commutator 10, supported bybracket 11. Around this commutator travels a brush 12 which is carried by an arm 13, attached to the end of a shaft 14. This shaft is mounted in a bearing 15 and revolved, at a uniform speed, by any suitable means (not shown). Arm 13 is made integral with a c0llar'16', and together with collar 16, is thoroughly insulated from shaft 14 bysuitable means. Commutator 10 has, say, five metallic sections, 17, 18, 19, 20 and 21, preferably sepalarge sections 22 of insulating material. ections 17, 18, 19, 20 and'21 are connected, by wires 23, 24, 25, 26 and 27, respectively, with a terminal 28 of a radio sending coil 29, the other terminal 30 of which is connected to one of the poles Specification of Letters Patent.

1918. Serial No. 234,876.

of batteries 32. The other poleof these batteries is connected to insulated brush 34 which is in contact -with collar 16. On wires 24, 25, 26 and 27 are located switches 35, 36, 37 and 38 which are normally open, but are adapted to be closed by the hand of the the operator at the sending station.

At the receiving station there is located a commutator 39, supported by bracket 40, which is practically a duplicate of commutator 10. With this commutator there is held in contact a brush 41 by an arm 42 which is attached to the end of a shaft 43, and which, together with collar 44, integral with arm 42, 1s insulated from shaft 43 by suitable means.

Shaft 43 is mounted in suitable bearings 45 and 46, and carries, thoroughly insulated from it, rings 47 48 and 49, and two pole armature 50. With wings 47, 48 and 49 are held in contact, by a suitable support 51, brushes 52, 53 and 54,

respectively, all thoroughly insulated from support 51. One end 55 of the winding 56 on armature 50 is connected to ring 47, while the other end 57 of winding 56 is connected to both of rings 48 and 49. Rings 47 and 48 are metallic throughout; but ring 49 has a considerable portion 58 of its outer rim composed of insulating material, while the larger portion 59 is metallic. A magnet 60 is arranged so that armature 50 is located between its poles 61 and 62, and is provided with a winding 63 through which a suitable constant electric current (from a source not shown) is directed so as to hold armature 50, and consequently rings 47,-48 and 49, in the position shown in Fig. 4 when a current passes through winding 56 from end 57 to end 55 thereof. Brush 52 is connectedto a hammer 64 which is normally in contact with a terminal 65, but is adapted to be drawn awayfrom such terminal, and to be brought in contact with a similar terminal 66, by amagnet 67 the winding of whichis at one end connected with brush 54, and also with the positive pole of a battery 69, while at the other end it is connected with a terminal 70, and also with the, negative pole of a battery 71, the positive pole of which is connected to terminal 66. Brush 53 is connected to the positive ole of a battery 72, the negative pole of w ich is connected to terminal 65. -The negative pole of battery 69 is connected to a hammer 73, located opposite to terminal 70, and adapted to be brought in' contact with it by magnet 7 4 the Patented .June 7, 1921.

- and 81, respectively, of commutator 39 (which sections correspond to sections 18, 19, 20 and 21, respectively of commutator 10). The positive pole of battery is connected to a hammer 76 which is adapted to be brought by'a magnet 82, in contact with a terminal. 83,"which is connected to a brush 97 held in contact with collar 44 by a bracket 85. The winding on magnet 82 at one end is connected with one terminal 86 of coherer87 while at the other end it is connected with the negative pole of a battery 92 the positive pole of which is connected to the other terminal 93 of coherer 87. Terminal 93 is also connected to aerial 94 while to terminal 86 there is also connected grounding wire 95.

The operation of my devices} is as fol- All connections having been properly made, all batteries having been properly charged, shaft 14.with arm 13 and brush 12 having been set in motion at a speed of, say, one revolution in every second, and switches 35, 36, 37 and 38 being open, a current is sent through coil 29 from batteries 32 everytime brush 12 passes over section 17 of commutator 10, or once every second. Whenever this happens coherer 87 v is affected by means of jigacurrents from aerial 94 passing through it to grounded wire 95, thereby making it possible for the current from battery 92 likewise to pass through coherer 87 and to energize magnet 82. Whenever this happens hammer 76 is brought into contact with terminal 83, thereby closing the circuit from battery 7 5 over magnet 74 byyway of brush 97, arm 42, and

ntil thisoccurs hammer 64 is.

section 77. in contact with terminal 65, and a current flows from battery '72, by way of brush 53 and ring 48 from end 57 toward end 55 through coil .56, and throughring 47 and brush 52 back to battery 72, thereb holdin armature 50, and with it rings 4 48 an 49 in the position shown in Fig. 4. As soon however as magnet 74 is energized by the current from battery 75, hammer 73 is brought into contact with terminal 70, and thereby the circuit from battery 69 over magnet 67 is closed, and hammer. 64 is pulled away from terminal 65 and brou ht into contact with terminal 66, thereby isconnecting the circuit from battery 72 through coil 56, with the current running from end57 to end 55, but causing a current from battery 71 by way of hammer 64,

brush 52, ring 47, ring 49, brush 54 and the windin of magnet 67 to pass from end 55 to end 5? through coil 56. This reversal of the current through coil 56 will cause instantly a reversal of the poles of armature 50, and hence a'half revolution of it. Assuming for the present that this revolution will take place in the-direction indicated by arrow 96, it will be seen that at the moment when the half revolution of armature '50 is completed, brush 54 has lost contact with the metallic portion 59 of ring 49, and come in contact with non-conducting portion 58 of that ring. This breaks the circuit from battery 71 both through winding 56 and the winding of magnet 67, with the result that the normal contact between hammer 64 and terminal 65, and thereby the current from battery 72 through coil 56, flowing from end 57 to end 55, is reestablished, causing in connection with the momentum acquired by the first half-turn, ar-

mature 50 to complete its revolution and to assume again its normal position shown in Fig. 4. The apparatus will thereupon be ready to respond again to an impulse from sending coil 29; and since such an impulse will occur every time when brush. 12 passes over section 17, armature 50 will make a revolution coincident with every revolution of arm 13. If by any chance on the drawing down of hammer 73 by magnet 74, armature 50 should start to turn in the direction opposite to that indicated by arrow 96, the current from battery 71 would be interrupted, immediately after the starting of the turn, by brush 54 coming in contact with portion 58. This not only would de-' prive armature 50 of all further impulse to complete the half turn which it started to make, ,but would instantly release hammer 64, thereby reestablishing contact of it with terminal 65, and again causing the current from battery 72 to flow through coil '56 from end 57 toward end 55, and hence armature 50 to swing back, in the'direct'ion indicated by arrow 96, toward its original position and beyond it, thence to be turned by the continuously repeated impulses from sending coil 29 in continuous rotation in the manner hereinabove described, in the direction indicated by arrow 96.

When after this continuous rotation of armature 50, in practical unison with the rotation of arm 13, is established, any one of switches 35, 36, 37 or 38- is closed, then while such switch remains closed, there is on each turn of arm 13, when brush 12 passes over the segment 18, 19, 20 or 21, connected to such switch, a current sent through coil 29 which instantly affects coof section 77 and the winding on magnet 74, but is closed by way of the segment 7 8, 79, 80 or 81-which corresponds to the segment 18, 19, 20 or 21 through which the current over the closed switch: or switches 35, 36, 37 or 38 passes, and by way ofthe winding on the magnet 88, 89, 90 or 91 thus resulting in single or successive impulses to any one or more of these magnets at the will of the operator manipulating switches 35, 36, 37 and 38. These impulses may be utilized for the control of various devices by means of magnets 88, 89, 90 or 91, such for instance as the setting and releasing of signals, as will be readily understood by anyone familiar with the many uses to which such magnets may be put.

In the modified construction illustrated by Fig. 5, magnets 88, 89, 90 and 91, and the wire connections, leading to them; also magnet 82, terminal 83, hammer 76, aerial 94, coherer 87, and their wire connections; also sending coil 29, batteries 32, wires 24, 25, 26 and 27, and the switches thereon;

also sections 18, 19, 20, 21 and 78, 79, 80.

and 81 are omitted; commutators 10 and 39 are made entirely of non-conducting. material, with the sole exceptions of sections 17 and 77; and the windmg of magnet 74 is at one end connected with an insulated brush 34 which is in contact with collar 16, while the other end is connected to one of the poles of battery 75 the other pole of which in this case is connected with section 17. I

With this modified construction the circuit of battery 75 over the winding of magnet 74 is closed every time brush 12 comes in contact with section 17, and opened every time such contact ceases As a result armature 50 will be caused, in the manner above described, to makea rotation every time shaft 14 makes a rotation, and syn-' chronous movement of armature 50 with the engine driving shaft 14 will beestablished. Such movement may probably be used for many different purposes, such for instance as the timing of a phonograph to the motion of a 'moving picture machine. It is however not the purpose of this application to set forth the manner of any specific use b of my inve tion.

.to cover- I cla1m: 1. In a wireless control device, the combination of means at the sending station forgenerating jig-currents at regular intervals, with an armature rotatable in an' electric field at the receiving station; means for utilizing the jig-currents to cause a partial rotation of the armature; and automatic means at the receiving station for completing the rotation of the armature during each interval.

2. In a wireless control device, the combination of means at the sending station for generating jig-currents at regular intervals, with an armature rotatable in an electric field at the receiving station; means generating jig-currents at regular intervals,

w1th anarmature rotatable in an electric field at the receiving station; means for,

utilizing such jig-currents to cause a partial rotation of the armature; automatic means at the receiving station for completing the rotation of the armature during each such interval; means at the sending station for sending additional jig-currents during any such intervals at regular specific momerits-of such intervals; and means for utilizing the rotation of the armature at the receiving station in connection with such additional jig-currents, sent at such regular specific moments of such intervals for temporarily energizing s ecific corresponding magnets, substantial y as and for the purpose described.

4. In a wireless control device, the combination of means at the sending station for generating jig-currents at regular intervals, with an armature rotatable in an electric field at the receivingv station; means for utilizing the jig-currents to cause a reversal,

of thepolarity of such armature; and automatic means at the receiving station for restoring the original polarity of such arma-' ture during each interval.

5. In a wireless control device, thecombination of means at the sending station for generating jig-currents at re lar intervals, with an armature rotatab e in an electric field at'the receiving station; means forutilizing the jig-currents to cause a par tial rotation of the armature; automatic means at the receiving station for completing the rotation of the' armature durlng each interval; and automatic means for preventing the armature from' turmng 1n the wrong direction.

6. In an electric control device, the combination of means at the control station for transmitting impulses at regular intervals, With an armature rotatable in an electric field at the controlled station; means at the controlled station for utilizing the impulses from the control station to cause partial rotation of the armature; and automatic means at the controlled station for completing the rotation of the armature during each interval. 7

7 In an electric control device, the combination of means at the control station for transmitting impulses at regular intervals, with an armature rotatable in an electric field at the controlled station; means at the controlled station for utilizing the impulses from the control station to cause partial rotation of the armature; automatic means at the controlled station for completing the rotation of the armature during each interval; and automatic means at the controlled station for preventing the armature from turning in the wrong direction.

8. In electric control devices, the com bination of a motor operated by the alternate use of two electric batteries; a two-way switch, controlling the currents "from the batteries, normally closing the circuit of one of the batteries; an electro-magnet controlling the switch; a circuit for the current from the other battery over the winding of the-magnet; a circuit for a third current over such winding; means for sending such third current at regular intervals, thereby each time closing the switch and reversing the current over the motor; and automatic means, operated by the motor, for cutting but, on being closed, opening such circuit and. closing the circuit of the other battery; means for closing such switch at regular intervals, thereby reversing the current over the motor; and automatic means, operated by the motor, for cutting off the reversed current upon the completion of a half revolution of the motor, and for restoring the current over the winding of the magnet; a

circuit for a third current over such winding; means for sending such third current at regular intervals, thereby each time closing the switch and changing the current over the motor; and automatic means operated by the motor for cutting off the reversed current upon each half revolution of the motor, thereby releasing the switch and restoring the original current.

11. In electric control devices, the combination of a motor operated by the alternate use of two electric batteries; a two-way switch, controlling the currents from the batteries, normally closing the circuit of one of the batteries; an electro-magnet controlling the switch; a circuit for the current from the other battery over the winding of the magnet; a circuit for athird current, flowing in the same direction, over suchwinding; means for. sending such third current at regular intervals; and automatic means, operated by the motor, for reopening the switch.

JOHN LINDGREN.

Witnesses:

CARL SrRovER, Iva G. WOODEN.

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