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Aug. 16, 1938. S. HIRSCIH TRANSFORMER Filed Jan. l2, 193'? 2,127,218 Patented Aug. 16, 1938 2,127,218; UNITED STATES PATENT GFFlCE 2,127,218 TRANSFORMER. Samuel Hirsch, New York, N. Y., assigner to Arthur Mutscheller, New York, N. li'. Application January 12, >193'7, Serial No. 120,171 7 Claims. This, in part, is a divisional application of my into the period when cores were fashioned fol application, I have shown and described, in com bination withkan X-ray tube, a novel kind of transformer which can be employed with gaining of valuable advantages in combination with other lowing the example of Gramme. All these de vices, comparatively speaking, are low Voltage 5 devices and not constructed under the guidance of the discovery herein described. comparatively high voltages. More particularly stated, I have discovered, that this type of transformer lends itself highly `advantageously to construct a high voltage trans former having a very short magnetic core and for that reason it has a very high efiiciency; but l5 more in particular, this form of transformer is in the art. Also, the core part surrounded by windings may be either straight or it may be bent so as to better fit into the lumen of the coils when they are tilted as described. The bent core construction may, in certain cases, be preferable 15 because of closer spacing, but the straight core ings and for combining therewith as one compact and small unit any such devices which can be actuated by high tension currents or which are suitable for rectifying or transforming it. Thus, in itself or upon a spacer collar so that the inner lbut, in the same fashion, any other electron dis~ 25 charge device, or in fact, any other electrical de vice operable with high voltage current may be similarly located or placed either entirely or in part, between the secondary coils of this trans former. Thereby the advantages of a smaller size trans former having especially a shorter magnetic core and of a much more compact combination of the transformer with such devices to be actuated by the secondary current generated by this trans 35 former are obtained. Such a transformer hav ing the features that make the obtaining of these advantages possible is shown in Fig. l, as a side View, showing one coil cut away and in cross-section and one in full, in i() Fig. 2, as a View at right angle to that of Fig; 1 and along the dotted line marked ¿1f-n, in Fig. 3, as another construction having a straight core leg, in Fig. 4, with a novel type valve tube for full cycle 5 rectiñcation connected to a transformer of my new design, and in Fig. 5, as with an electron discharge rectiiying tube connected to one terminal of the new trans en o The core of a transformer of my discovery may be either of the somcalled c-ore or of the shell type, in fact, it may be of any of the variations known 10 especially suitable for placing between the coils of the high tension generating secondary wind in the above identified application, I have shown, located in part between the coils, an X-ray tube; S0 secondary windings. These constructions are mostly accidental and almost exclusively, they fall pending application for X-ray apparatus, iiled January 12, 1933, Serial No. 651,316. In that devices, in particular such which operate with l0 (Cl. 175-363) former. The old art contains descriptions of induc tances and low voltage transformers in ring form i. e. wound on an annular core, but no attempt is made in any of these cases to wind spaced coils and to place into the space between the coils any 5,' device to be actuated by the current from these can be utilized if the primary coil is wound either lumen is tilted with respect of the outer cylin drical shape. Whichever method of producing 2O the tilting of the secondary coils on the core is employed, it does not outstep the scope of my in~ vention for such expedients are equivalents and well known and. understood in this art. In the transformer shown in Fig. l, I is the magnetic core made, in the usual manner of lamination; 2 is a spacer of high dielectric mate rial which in many cases can be useful to enable the bringing the coils closer together without re sulting in spark-over between the c-oils. The 30, secondary coils t and 9 are wound, in the custom ary manner, upon a tube of insulating material serving as a mandrel 4 and within this, the pri mary coils 5 are placed; usually these are wound upon a paper tube to prevent short circuiting to the core. The secondary coils are clamped into a peripherally applied metal collar il, which is clamped together with the clamp screw I0 which, however must be insulated so as not to complete a turn of metal and cause short-circuiting. 40 In Fig. 1, the coils are placed upon a bent core whereby the coils become tilted or inclined to ward one another and whereby a greater spacing between the coils on the side not occupied by the free or outer leg of the core is obtained. Into this space then, there can be placed, for in~ stance an electron discharge tube which is actu ated b-y and therefore directly connected to the outer, high voltage producing secondary windings 50 of the two coils. In fact, the electrodes of such an electron discharge tube, in many cases, can be directly fastened on to the metal band collar Il and thus be given a firm and rigid support; in a similar manner, when a rigid device is thus 55` 2 2,127,218 fastened to the two coils, it greatly decreases the danger of slipping or telescoping of the coils and thus, this construction generally is found to improve the rigidity of the entire assembly and at the same time, due to the tilt of the coils, the core and thus the length of the magnetic circuit is much decreased with a corresponding decrease of magnetic losses. Another manner of causing the desired tilting 10 of the coils is illustrated in Fig. 3. It shows a straight core passing through the coils and a do not limit myself in any particular way to the exact descriptions herein given, but I claim. l. A transformer for alternating current com prising a magnetic core, primary and secondary windings surrounding said core, said secondary windings having two coils in height at least equal to their width, spaced apart and mutually in clined whereby greater spacing for a device to be located at least in part between said secondary coils and a shorter magnetic core are obtained. 2. An alternating current transformer having spacer-collar 3 ís employed to tilt both the pri- ~ a core of magnetic material, surrounded by in mary and the secondary coils. This spacer may sulated primary and secondary windings, said secondary windings having two coils of rectangu be a block of wood or other insulating material 15 having negligible magnetic properties and a hole passing the core is bored slanting to the cylin drical outer shape upon which the coils are placed It is, however also possible to fashion the pri mary winding in the shape of this wooden 20 spacer, and then this spacer becomes unneces sary. Fig. 2, is an end view of the transformer shown in Fig. l, the View being taken long the dotted line marked a--a, looking in the direc tion of the arrows. 25 The inner windings of the secondary coils E and 9 carrying low voltage, may be grounded or they may be connected together and insulated. In that case the grounding of the secondaries or the devices actuated thereby may be in any con 30 venient place, so long as the required insulation for the opposite portion of the circuit is provided. In Fig. 4 is shown a transformer of this novel design in combinaion with an electron discharge type rectifier producing a highly compact unit. 35 The discharge tube has connected to the voltage carrying transformer secondaries both a cathode and an anode. Thereby the voltage impulses produced in the secondary windings are directed to either an additional cathode if positive, or to 40 an additional anode if negative. These addi core is obtained. 3. A transformer for currents having a period ically changing current component comprising a core of magnetic material, primary and second ary windings surrounding said core and said sec ondary windings having two coils of upright standing rectangular cross-section spaced apart and a device located in part between said second ary windings and connected to one terminal of said transformer secon-darles to be included in the circuit of said secondary windings7 and said coils being inclined so that the spacing between said coils on the side where said device is located therebetween is greater than on the side of the outer core and whereby the said core can be made shorter and the bulk and the magnetic losses of said transformer are reduced. 4. An alternating current transformer having a magnetic core, insulated primary and second ary windings on said core, said secondary wind ings having two separated coils in cross-section former are delivered to the - marked electrodes (anodes) and in this way a unidirectional pul sating current is delivered into an outside cir cuit. In the Fig. 4, the rectifier tube should be coils so as to be included in the circuit of said transformer win-dings and to be connected to an additional device completing the said circuit and respectively and in the arrangement shown all the plus impulses of the transformer are de livered to the + marked electrode (cathode) and 45 all the negative impulses produced by the trans 50 rotated so that the -l- and - marked electrodes are at right angles to the drawing and thus that these electrodes are spaced equally from the core and the coils. This rotation in the drawing is made to make the drawing less complicated and 55 clearer. In Fig. 5, also a transformer of my invention is shown, but with a rectifier or valve tube con nected to one terminal of the transformer sec ondaries only. From this arrangement results 60 a compact device producing reciñed or unidi rectional pulsating high voltage current with the suppression of every second half cycle which is stopped by the valve tube connected to coil B as shown in Fig. 5. In the case of both arrangements shown in Figs. 4 and 5, it is possible, through the addition of condensers, to produce high voltage constant potential current by the application of prin 70 greater spacing between said last mentioned part of the secondary coils with a shorer magnetic narrower than high and mutually inclined whereby increased spacing between said coils for additional devices to be located partly between said coils is obtained, and an electron discharge rectifier device located in part between said coils, connected to the outer windings of one of said tional cathodes and anodes are marked -l- and _ 65 lar upright cross-section being spaced less near the outer free leg of the said core and spaced more on the side opposite thereto whereby ciples well known in the art. Having thus described several variations of making and constructing the novel type of trans former which I have invented and having shown several methods of combining it with devices to be energized thereby and so obtaining new and 75 useful results not known or obtained before, I to be energized thereby. 5. In a transformer, a closed core of magnetic material, primary and secondary windings sur rounding said core, said secondary windings having two narrow upright coils spaced apart and tilted in opposite direction from one another that increased spacing for additional devices to be located at least in part between said coils is obtained and means for tilting and mechanically supporting said coils in said tilted arrangement. 6. An alternating current transformer having a closed magnetic core, insulated primary and secondary windings surrounding a part of said core, said secondary windings having two coils higher in cross-section than wide separated and inclined that the spacing between said coils on the side of the free part of said core is less than on the side opposite thereto and evacuated elec tron discharge rectifying means located in part between the said secondary windings, said recti~ fying means having an anode and a cathode con nected to and being supported by each of the outer high voltage developig secondary windings and having additional anodes and cathodes co operaing therewith and heating means for said n 3 2,127,218 cathodes whereby a unidirectional high voltage current is produced. 7. An electromagnetic transformer for alter resting on said coils and a shorter magnetic core is obtained and an evacuated electron discharge device located in part between said coils and said nating currents having a closed magnetic core, device having cooperating electron discharging windings for primary and secondary currents and receiving electrodes connected to and sup surrounding a part of said core and means for ported by the outer high voltage producing parts energizing said primary windings, said second ary windings having two coils separated spacial of said coils and additional electrodes for de livering at least a part of the discharged elec ly from each other and inclined mutually toward trons to an outside circuit. 10 each other that increased spacing for an addi tional device to be located in part between and SAMUEL HIRSCH.