Electrolytic Rectifier by Fischer

Radiant Energy System

The present invention relates to apparatus for receiving and transmitting radiant energy within a wide range of frequencies and has for an object the provision of apparatus of this kind that is operative without the necessity of source of local energy such as commercial current or batteries.

Another object of the invention is to provide in a radiant wave receiver a means including a rectifier and a magnetic pulsating generator whereby the incoming wave of low strength is instrumental in energizing said magnetic pulsating generator to produce a desired E. M. F.

A further object of the invention is to provide a chemical rectifier and a magnetic pulsating generator in a tuning circuit for accomplishing the foregoing mentioned objects.

A further object of the invention is to provide an improved magnetic pulsating generator that is susceptible to comparatively weak electrical impulses.

Another object of the invention is to provide apparatus useful variously, and including radio signal receiving whereby the incoming wave is rectified and amplified without the use of vacuum tubes or commercial local power until it attains the desired E. M. F. to actuate a utilizing instrumentality such as a loud speaker.

These and other objects are attained by the means described herein and disclosed in the accompanying drawings, in which: Fig. 1 is a wiring diagram of a radio receiving circuit showing schematically the chemical rectifiers and the magnetic pulsating generators of the invention.

Fig. 2 is an elevational view of the improved magnetic pulsating generator of the invention.

Figs. 3 and 4 are elevational and cross sectional views, respectively, of the chemical rectifier of the invention.

Fig. 5 is a circuit diagram for a transmitter of radiant energy shown specifically for radio transmission.

Fig. 6 is a circuit diagram showing a radio receiver hook-up adapted for full wave rectification and amplification up to audio signal strength.

Figs. 7 and 8 are respectively vertical section and top plan views of a magnetic microphone usable with the present invention.

Fig. 9 is a diagrammatic view of a modified form of magnetic pulsating generator of the Invention.

This application is a continuation in part of my copending application Serial No. 719,363, filed April 6, 1934.

The present invention makes use of either a full radiant energy wave or half of such waves from whatever source and is adapted for use without local commercial electricity or batteries.

Circuits made up with the devices of the invention are also adaptable in other devices that utilize commercial or battery current.

In each of the operative embodiments of the present invention there is included essentially an antenna or other means for wave reception from broadcast or other source as the case may be in a suitable hook-up as suggested in the several drawings and the chemical rectifier or rectifiers and magnetic pulsating generator or generators. The vital elements of the invention in whatever embodiment it may be used are constituted by the chemical rectifier and the magnetic pulsating generator. The chemical rectifier may be made in several forms but consists essentially of an insulating container 10 having an outer grounded metallic coating II extending at least partly over the exterior and a top closure member 12 from which are suspended in insulated relation three electrodes of similar metals having low resistance to flow of electrical energy. These electrodes 13 and 14 are plate elements and 15 is a screen or reticulated element which is interposed between elements 13 and 14. Contained within the member 10 is a solution of mercuric salts, Rochelle salts, and water, in the proportion of about five parts mercuric salts, 5 parts zinc sulphate, 5 parts copper sulphate, ten parts Rochelle salts, and the balance water to make one hundred parts. It is understood that some variation in the proportions of the salts may be made. Proportions given are productive of good results.

The plates and screen electrodes in the electrolyte serve the purpose of the conventional thermionic tube without need for a filament and its energizing current.

The electrodes are preferably of copper, but with a different chemical solution other conductive material of as low resistance to the flow of electrical energy as possible may be used. In .15 operation the chemical rectifier has the screen or grid element 15 connected to one side of an input source of alternating current and the plate 14 connected to the opposite side of the A. C. circuit. The incoming impulse passes from the screen 15 through the solution 16 to plate 14, but does not allow a reverse flow to the screen.

The plate 13 thereby becomes a positive electrode and plate 14 a negative electrode which receives current flow from both screen 15 and plate 13. .5 Alternatively stated, screen 15 and plate 14 may c be made the input terminals for the alternating c current and plates 13 and 14 the output termi- c nals for the rectified or direct current. 2 The chemical rectifiers may be made of an a overall size comparable with present day thermionic tubes, the metallic coating 11 being con- t ductively connected with a metallic mounting base if desired. In practice the plate 14 constituting one side of the input to the rectifier is somewhat closer to the screen or grid 15 than the plate 13 which forms one side of the output.

The output is more favorably intensified under these circumstances. Input and output connections to the chemical rectifier may be interchanged so long as screen or grid 15 has no output connection.

The magnetic pulsating generator of the present invention consists essentially of an electromagnetic coil 17 having a suitable laminated core 18 and adapted to have its opposite ends connected to an input source in such manner as to produce a north magnetic pole at the top of core 18. This is suitably mounted in insulated relation upon a non-magnetic base 19 which also supports electromagnet coil 20 having a core 21 collecting a south pole magnetic force at its top 22 which extends somewhat above the level of the top of core 18 of the electromagnet coil I7. An electromagnet coil 23 has a core 24 magnetically connected as at 25 to form a U-shaped core with the core 21 of coil 20, and the top end 26 of core 24 will, upon energization of the coils, become a north magnetic pole. Coils 20 and 23 are connected in parallel by conductors 21 and 28, the continuation of which forms the output portion of the device.

Mounted for oscillation above the aligned cores 18, 21 and 24 is a permanent magnet comprising an arcuate portion 29 having a normaly substantially horizontal leg 30 that extends from the top of core 18 substantially to the top of core 21. The permanent magnet has its north pole at 31 which is directly above the top of core 24 and has south 41 magnetic polarity at points 32 and 33 which are adjacent the top of cores 18 and 21, respectively.

The permanent magnet assembly is pivotally mounted at 34 in magnetically insulated relation and is adapted to oscillate on its pivot in response Sto the polarities set up in the several electromagnet coils. It is to be understood that the pivotal mounting 34 is to be of anti-friction variety so as to allow the permanent magnet to be readily responsive to attraction and repulsion of the elec5 tromagnet cores. To this end, and to avoid oscillation due to physical vibrations, light sustaining springs 35 of non-magnetic material may be employed at the opposite ends of the arcuate portion of the permanent magnet or any other readily yieldable stabilizing means may be employed. The operation of the magnetic pulsating generator per se is as follows: alternating impulses received in coil IT set up north and south magnetic polarity alternately at the top of core 18. When the polarity at the top of core 18 is of a north variety the adjacent portion 32 of the permanent magnet which is south pole variety is attracted thereto, rocking the permanent magnetic structure on its axis and causing the end 33 to move relative to the end 22 of core 21 and thereby inducing an E. M. F. in the coil 20. The induced current from coil 20 passes through coil 23 setting up north magnetic polarity in the end 26 of core 24 and increasing the 7. magnetic repulsion between it and the point 31 If the permanent magnet. When the other half f the input alternating current impulse is reeived in coil I7 the induction of current in coil 0, the passage of current therefrom to coil 24 nd the sum total output is repeated in reversed polarity. Thus, the magnetic pulsating generaor is susceptible of receiving in the input coil 17 a very weak alternating impulse, as low, for example, as the order of thirty thousandths of a volt and will deliver from the output coils an alternating current of materially augmented strength, e. g., five to ten times greater than that of the input impulse. The arrangement of these magnetic pulsating generators in electrical succession with the chemical rectifiers of the inven- 1. tion inserted in circuit therewith as hereinafter explained enables the progressive building up of the E. M. F. to the desired voltage. When the input to coil 17 is of weak pulsating D. C. variety, the output from coils 20 and 24 will be of like variety but of increased voltage.

Fig. 1 shows a conventional radio hook-up containing two stages of radio frequency amplification, a push-pull detector, and one stage of pushpull output amplification. When a hook-up such as shown in Fig. 1 is tuned and is receiving a frequency of several hundred kilocycles at a strength of about thirty thousandths of a volt, the ultimate output voltage will be approximately twenty volts under favorable conditions. The magnetic pulsating generator serves to materially if not completely suppress static or stray impulses impressed upon the circuit due to the fact that the incoming signal representing the sound wave is of higher E. M. F. value than the back- 3:, ground or static imposed impulse. This is true because the stray impulses or static disturbances are of a generally much lower wave length and E. M. F. value and therefore do not carry through in proportional values to those of the sound waves. When a plurality of the magnetic pulsating generators are used in a radio circuit, as for example in Fig. 1, the perceptible static disturbance appears to be completely eliminated under almost all circumstances. It will be under- 4; stood of course that any stray impulses of such nature as would create arcing from the antenna to ground would not be suppressed.

In this connection it is to be understood that the magnetic pulsating generators as shown in 5 Fig. 2 may be connected in the circuit of present day radio receivers as a means of suppressing static and kindred stray disturbances. To accomplish the latter, it may be explained in a general fashion that the magnetic pulsating genera- 5: tors would be connected in series in the grounding circuit of the radio frequency and audio frequency transformers.

In Fig. 1 there is shown a hook-up consisting of a tuning circuit, chemical rectifiers, and mag- 6′ netic pulsating generators of the simplified form, and an amplifying circuit, the tuning circuit being used to tune the wave received while the said magnetic pulsating generators serve to charge the chemical rectifiers and to discharge the recti- 6′ fled E. M. F. to other parts of the set. The simplified form of magnetic pulsating generator eliminates the element corresponding to electromagnetic coil 20 of Fig. 2. These simplified magnetic pulsating generators are indicated generally as 36, 37, and 38 in Fig. 1. The operation of the device as disclosed in Fig. 1 is as follows: assuming the antenna circuit 39 to be tuned to a given wave length by variable condensers 40, 41 and 42, the direction of current y7 through the device is as follows, the alternating wave passing from primary 43 to secondary 44 passes by way of conductors 45 and 46 through coil 47 of the pulsator 36 and through the screen and plate 48 and 49, respectively, of the pair of chemical rectifiers 50 and 51 which are connected in parallel. This induces a voltage in coil 52 of the generator 36 due to the oscillation of the magnet 53. This pulsating E. M. F. passes ]u to the top of primary winding 54 of a radio frequency transformer indicated generally at 55 from which primary the current returns through ground conductor 58. This E. M. F. also passes through the chemical rectifiers 50 and 51 and Scoil 47. This forms a valving action between plates or electrodes 49 and 56. The primary 54 and secondary 57 of transformer 55 are connected to the ground wire 58 and to the plates 49 of a second pair of rectifiers 59 and 60, thus effecting a substantial duplication of the operation of the previously described radio frequency amplification save that the magnetic pulsating generator is omitted from the circuit. Plates 56 of chemical rectifiers 59 and 60 are connected to conductor 61 which leads to the primary 62 of the radio frequency detector coils. The output of secondary detector coils 63 passes through grid leak condensers 64 and 65, respectively, to the screen elements 48 of chemical rectifiers 66 and 67, respectively, and where D. C. pulsating E. M. F. is delivered through conductors 68 and 69 of the primary winding 70 of push-pull transformer 71. The return circuit to the ground from said primary coils is through conductors 72 and 73 and electromagnet coil 74 of the magnetic pulsating generator 37 which is, during the same interval, setting up an augmented D. C. pulsating E. M. F. through conductors 73 and 76 to the primaries 77 of an output push-pull transformer 78. The ground return lines from primaries 77 of the push-pull transformer 78 is through conductors 79 and 80 which are connected to plate elements 56 of a pair of chemical rectifiers 81 and 82 connected in parallel in the manner characteristically set forth in the preceding description. The output of secondary coils 83 of the push-pull transformer 78 passes by way of conductors 84 and 85 to the screen elements 48 of a pair of chemical rectifiers 86 and 87, respectively. The flow from elements 48 is through the chemical rectifiers 86 and 87 to the plates 49 thereof which are connected together by conductor 88 which leads to the bottom of colls 89 and 90 of magnetic pulsating generator 38, and ;, sets up a D. C. pulsating E. M. F. in coil 90 from whence the E. M. F. is delivered through conductor 91 to resistance output 92 This resistance is of the order of 2000 ohms on either side of its connection with the conductor 91 and the ;u E. M. F. flowing from the ends 93 and 94 of said resistance is delivered, respectively, to the plate elements 56 of the chemical rectifiers 86 and 87 from whence it flows to the plates 49 of said rectifiers and hence to the ground at 95. The en3c ergy is collected from the ends 93 and 94 of the resistance 92 in fixed condensers 96 and 97 which may be of the order of .01 microfarad and from thence to a point of utilization which in this circuit is a low resistance magnetic type loud speaker 98.

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