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Патент USA US2127218

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Aug. 16, 1938.
Filed Jan. l2, 193'?
Patented Aug. 16, 1938
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
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
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;
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
(Cl. 175-363)
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.
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`
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.
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
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 _
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
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
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