Dac., 24, 1946. E, 5_ PURINGTQN 2,413,066 TORPEDO CONTROL BY MULTIPLE CHANNEL SELECTOR Filed NOV. 6, 1935 T INVENTOR ELUSO'N S. PURlNGTON BY /ßwif ¿i MMM@ ATTORNEY Patented Dec. 24, 1946 ` 2,413,066 UNITED STATES' PATENT OFFICE 2,413,066 TORPEDO CONTROL BY MULTIPLE CHANNEL SELECTOR Ellison S. Purington, Gloucester,l Mass., assigner ‘ to United States of America, as represented by the Secretary of the Navy Application November 6, 19375, Serial No. 48,582 4 claims. (Cl. 172--282) 1 2 This invention relates to the control of mov and 24, and two condensers 25 and 26. The sec ondaries of the transformers 23 and 24 are con nected in the filament circuits of two space dis ing bodies from a distance, and more particularly to a new and improved means for preventing re spOnse in this control from other than the de charge devices 21 and 28, and also by wires 50, Si sired source. to two resistances 28 and 30 and by wires t2, it to the grids of two space discharge devices 3i and 32. The output circuits of these devices include a double solenoid consisting of two windings 33 and 34 connected to the anodes of tubes 3i and 32 by wires 84 and 65, respectively, and two bat teries 35 and 36. The point between these bat teries is connected to the plates and grids of the devices 21 and 28 by wire 86. The double solenoid 23 and 34 is provided with a central magnetic core 38, one end of which is secured to the stem of a valve 4I which is mount ed for reciprocation in a valve casing 42. SeM cured to the stem of the valve 4I are two collars 43 and 44, between which and the casing 42 are two spiral springs 45 and 46. The valve casing 42 is provided with three ports 41, 48, and 49 which communicate with a source of fluid under pressure 5I, and the two ends of a cylinder 52 re~spectively. The cylinder 52 is provided with a piston 53 which is normally held in a central po sition by means of two spiral springs 54 and 55. The piston 53 is connected by a piston rod 56 to , 'I'he invention relates particularly to a selective receiving system for radiant energy which is adapted to control the movement of a torpedo after it has been launched. The steering means of the torpedo is rendered operative in response 10 to radiant impulses transmitted from a distance and selectively effects the deviation of the tor pedo to port or starboard or maintains the steer ing means in a central position. The invention further provides a selective sys 15 tem of radio control which is dependent in its operation upon the use of two high frequency sig nais or a single high frequency modulated at two low frequencies. These signals operate the system so that when one is received the torpedo will be 20 caused to steer to the left, and when the other is received it will be steered to the right. The invention also consists in certain new and original features of construction and combina tions of parts hereinafter set forth and claimed. 25 Although the novel features which are believed to be characteristic of this invention will be par ticularly pointed out in the claims appended here a link 51, the other end of which is connected to to, the invention itself, as to its objects and ad~ an arm 58 for operating the rudder 59. vantages, the mode of its operation and the man Sii This system may be operated in either one of ner of its organization may be better understood two ways. First, by the use of two high fre by referring to the following description taken in quency waves, such for example as 203,500 cycles connection with the accompanying drawing form and 205,000 cycles. In this case, the oscillator lâ ing a part thereof, in which the single figure of could be used to produce oscillations of a third the drawing illustrates diagramma-tically the in 35 frequency, such for example as 200,000 cycles. vention as applied to the control of moving bodies. ' The switch I5 would then be closed, and when one Referring more particularly to the accompany wave, such for example as the 205,000 cycle came ing drawing, a radio receiver I0 is provided which in, it would be heterodyned with 200,000 cycles of may be of any suitable construction but is here the oscillator I6, to produce 5,000 cycles which shown as consisting of a space discharge ampli 40 would be impressed upon the input circuit of the iler II, the input circuit of which includes an in amplifierI II. The output from this amplifier ductance I2, and the secondary of a transformer would then pass through the transformer i1, and I3. The inductance I2 is adjustably connected to be amplified by the amplifier I8. The output of an antenna I4. The primary of the transformer this amplifier then causes oscillations ci’ 5,000 I3 is connected through a switch I5 to a source 45 cycle frequency to be produced in the tuned cir of oscillations IB. The receiver I0 may include cuit 22, which is tuned to this frequency. The any desired number of stages of radio and audio energy from this circuit then passes through the frequency amplification. transformer 24 to the filament of the device 28 The output circuit of the amplifier II includes which is thereby heated sufilciently to cause cur the primary of a transformer I1, the secondary 50 rent to flow from the battery 36, through wire of which is connected to the input circuit of the 66 and the anode and grid of tube 2S to the nia» space discharge amplifier I8. The output cir ment of this device and thence through wir, , cuit of the amplifier I8 includes a resistance and the resistance 30, battery 61 and battery to condenser I9, and two tuned circuits 2l and 22, battery 36. The iiow through resistance 30 is in comprising the primaries of two transformers 23 55 the direction of the arrow, thus producing a pm asiaocc f 3 tential difference across this resistance, which opposes the biasing voltage on the grid of the de vice 32, thus making this grid positive, which a1 lows current to ñow through the device 32, bat teries 68, 36 and 35, solenoid 34 and wire 65, thus so that the ñlaments of the devices 25 and 28 will not become overloaded due to excessive current. Although only a single form in which this in vention may be embodied has been shown here in, it is to be understood that the invention is not limited to any speciñc construction, but might energizing the solenoid winding 34. This causes be embodied in various forms without departing the core 3B to be moved downwardly, thus mov from thespirit of the invention or the scope of ing the valve 4I in a like direction, so that the the appended claims. supply port 41 is connected to the port 49, which What is claimed is: allows fluid under pressure to pass from the source 10 1. A system for controlling the operation of 5I to the lower end of the cylinder 52, which dirigible bodies at a distance by -radiant energy, causes the piston 53 to be moved upwardly, thus comprising the combination with a steering mech rotating the rudder 59 in a clockwise direction, which causes the torpedo to be steered to portk When the signal ceases, the ñlament of the device 28 will cool down, thereby stopping the ñow of current through the resistance 30, so that the anism, of a means responsive to radiant energy at a distance, two circuits tuned to different fre quencies and connected to be energized by re sponse of said means to received energy, two pri mary space discharge devices, the heating ele normal bias will be again produced on the grid ments of which are coupled to be energized by of the device 32, thereby stopping the ilow of the outputs of said tuned circuits, two resistances current through the solenoid winding 34. The 20 through which pass in opposite directions cur valve 4I will then be returned to its central posi ' rents controlled by 'said two primary space dis tion, under the action of the springs 45 and 45, charge devices, two secondary space discharge thus connecting both ends of the cylinders 52 devices, each secondary device having a grid con to the atmosphere. The piston 53, together with nected to be controlled by the potentials built up 25 the rudder 59, will then be brought back to a across said resistances, and a control device op central position under the action of the springs erated by the outputs of said secondary space dis 54 and 55. , charge devices connected to actuate said steering If a wave of 203,500 cycles is received, it will mechanism. be heterodyned'with the 200,000 cycles of the 0s 2. In a remote control system, a means for re ciilator I6, to produce 3,500 cycles in the input 30 ceiving and amplifying radiant energy of more circuit of the ampliñer II. This will then be am than one frequency, a plurality of circuits tuned plifled by this device and the ampliñer I8. The to said frequencies and connected to be energized output of the latter will then cause oscillations in response to received energy, a plurality of pri of 3,500 cycles to be produced in the tuned cir mary space discharge devices, the heating ele 35 cuit 2I which is tuned to this frequency. This ments of which are energized from said tuned will cause current to flow through the resistance circuits, a plurality of resistances through which 29 in the direction of the arrow which will give ilow currents controlled by said primary space rise to a positive potential that is impressed upon discharge devices, -a plurality of secondary space the grid of tube 3I, which will cause tube 3I to discharge devices having control elements, the 40 pass current and so energize the solenoid wind potentials on which are determined by the cur ing 33 in a manner similar to that already de rents flowing through said resistances, a control scribed. This will cause the valve 4I to be moved device operated by the outputs of said secondary upwardly, thus allowing iluid under pressure to. space discharge devices, and a steering mecha enter the upper end of the cylinder 52, causing 45 nism operated by said control device. the rudder 59 to be moved in a counterclockwise direction, thus steering the torpedo to starboard. It is thus seen that when a 205,000 cycle wave is sent, the torpedo will be steered to port and will continue to turn in this direction as long as this signal is transmitted. At the termination of this signal, the torpedo will then proceed on the course on which it is headed at that time. If a 203,500 cycle Wave is sent, the torpedo will be steered to starboard and will continue to so turn until the termination of this impulse. The other method of operation is by the use of a carrier wave, such for example as one of 3. In a remote control for a mobile body, ap paratus carried by said body comprising receiv ing means responsive to radiant energy and in cluding a vacuum tube and an input circuit there for, >means to impress a modulating voltage on said input, an amplifying vacuum tube and input and output circuits connected thereto, said output circuit including two circuits tuned to diñ’erent frequencies, means coupling the output of said receiving means to the input of said amplifying tube, two control vacuum tubes each having a fila ment respectively connected to be energized by one of said tuned circuits and an anode, a com 200,000 cycles modulated at 3,500 or 5,000 cycles. mon supply to the anodes of said control vacuum When this system is used, the switch I5 is open. v60 tubes, two operating vacuum tubes each having a The modulated waves are received by the an filament, a grid and an anode, two resistances tenna I4 and are amplified by the amplifiers II each having an end respectively connected to the and I8, producing oscillations of 3,500 or 5,000 iilament of a control vacuum tube and to the grid cycles in the output circuit of the latter device. oi’ an operating vacuum tube and having their When the wave modulated at 5,000 cycles is re 85 other ends connected in common to the filaments ceived, currents of this frequency will be set up of said operating tubes, a coil, means connecting in the tuned circuit 22, thereby causing the en each end of said coil to the anode of one operat ergization of the solenoid 34, which in turn will ing vacuum tube, means connecting the midpoint cause the rudder 59 to be moved in a clockwise of said coil to the filaments of said operating vac direction, in a manner already described. When 70 uum tubes, a core movable in said coil and steer the wave modulated at 3,500 cycles is received it ing mechanism control means operatively con will cause currents to ñow in the tuned circuit nected to said core. 2 I, thereby energizing the solenoid 33, and causing 4. In a remote control for a mobile body, ap- . the rudder 59 to be turned in a counterclockwise direction. The resistance and condenser lunit I 9 75 paratus carried by said body comprising receiv ing means responsive to radiant energy and in is used to limit the output of the ampliñer I8 5 cludins a. vacuum tube and an input circuit there ior, an amplifying vacuum tube and input and output circuits connected thereto, said output cir cuit including two circuits tuned to different frequencies, means coupling the output of said re ceiving means to the input of said amplifying tube, two control vacuum tubes each having a iilament respectively connected to be energized by filament, s. grid and an anode, two resistances each having an end respectively connected to the ñlament of a control vacuum tube and to the grid of an operating vacuum tube and having their other ends connected in common to the moments of said operating tubes, s coil, means connecting each end of said coil to the anode of one operat ing vacuum tube. means connecting the midpoint one of said tuned circuits and an anode, s com of said coil to the filaments of said operating vac mon supply to the anodes‘ot said control vacuum iI uum tubes, and a. core movable in said coil. tubes, two operating vacuum tubes each having l ELLISON 8. PURINGTON.