US1449871A - Modulator - Google Patents
Modulator Download PDFInfo
- Publication number
- US1449871A US1449871A US528845A US52884522A US1449871A US 1449871 A US1449871 A US 1449871A US 528845 A US528845 A US 528845A US 52884522 A US52884522 A US 52884522A US 1449871 A US1449871 A US 1449871A
- Authority
- US
- United States
- Prior art keywords
- coils
- core
- winding
- magnetic
- modulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/08—Amplitude modulation by means of variable impedance element
- H03C1/10—Amplitude modulation by means of variable impedance element the element being a current-dependent inductor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
Definitions
- My present invention relates to modu lators of high frequency current, and more particularly to modulators of the type commonly known as magnetic amplifiersI Devices of this general type as used in the past, described for example in U. S. patent to Alexanderson 1,206,643, have ordinarily been. constructed with the closed magnetic core made up of thin laminations.
- the object of my invention is to provide an improved method of constructing
- FIG. 1 shows diagrammatically the application of my invention to a radio telephone transmitting system
- Fig. .2 is aview of the modulator-with; a portion of the wind- 1 and 2 surrounding the two leg's"3 and 4,
- this modulator the coils 1 and 2 are first wound upon the s ools 5 and 6, and then placed side by side.
- he core is then formed by threading a thin ribbon of the desired magnetic material continuously through the spools 5 and 6,
- This ribbon may be made of electrolytic iron ,or mild steel," rolled down to a thickness of about 1 mil and eninsulation between the'turns of the ribbon.
- the coils 1 and 2 Surrounding. the coils 1 and 2 is a winding made up of portions 7 and 8 wound in opposite directions.
- the winding 7, 8 is connected in series with a radiating antenna 9, which is supplied with high frequency current froma' source 10 through the usual coupling transformer.
- the source 10 may be ,of any'form desired; a high frequency alternator, an arc generator, or a va-cuumtube generatohwModulation of the antenna current is effected by supplying a telephone current by means of a transmitter 12, and a local battery '13 to the windings l and 2.
- vIQ The method of constructing a magnetic .device for modulating .high frequency currents which consists in Winding two similar coils, placing the'two coils side by side, and forming a continuous magneticcore for the magneticfield which may be produced by currents flowing in said 'coilsf'by threading a thin ribbon of magneticmaterial through said oils.
- the enamel furnishing the desired similar coils, placing thetwocoils side by side, and forming a continuous magnetic core for the magnetic field which may be produced by currents flowing in. said coils by threading a thin ribbon. of magnetic material through said coils, and winding a coil around, both-of said first mentioned coils either before or after the magnetic core is formed.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Description
Mar. 27, 1923.
1,449,871. J. B. PRATT. I
MODULATOR.
HLED IAN-12,1922.
Fig.1.
Inventor:
John Pratt, b5 His Attorney o i e ell whom it may concern.
Patented Mar. 27, 1823.
UNITED STATES,
JOHN B. rna r'r, E
A MODULATOR,
Baits-known that L'JOHN B; PRATT, a citizen of the United States, residing at i "Schenectady in' the county of Schenectady,
State of New York, haveinvented certain new and useful Improvements in Modulators, of which the following is a specification. v
My present invention relates to modu lators of high frequency current, and more particularly to modulators of the type commonly known as magnetic amplifiersI Devices of this general type as used in the past, described for example in U. S. patent to Alexanderson 1,206,643, have ordinarily been. constructed with the closed magnetic core made up of thin laminations.
They have been constructed either by first I assembling the lamiriations of the core and then winding the coils on this core by threading the conductor through the openinserted withinthe coils.
The object of my invention is to provide an improved method of constructing,
the magnetic core of .such a device which will be simpler than previous methods and; result in an improved product. In carrying my invention into effect I first windfthe coils which are to surround the closed mag -netic core and then form the core by thread ing a thin ribbon of magnetic material thro h the coils making enoughturns in this ribbon to provide the desired cross sec-1 tional area of the core. a I i The novelfeatures which "I believe to be characteristic of my invention'are-set forth with particularity in the appended'claims,
myinvention itself, however, both as to ings broken away.
its organization and method "of operation will best be understood by referenceto the following description taken in connection with the. accompanying drawing in which Fig. 1 shows diagrammatically the application of my invention to a radio telephone transmitting system, and Fig. .2 is aview of the modulator-with; a portion of the wind- 1 and 2 surrounding the two leg's"3 and 4,
magnetic core.
Application m January 12,1922. Serial No. 528,845.
of a closed magnetic core made up of thin laminations. In constructing this modulator the coils 1 and 2 are first wound upon the s ools 5 and 6, and then placed side by side.
he core is then formed by threading a thin ribbon of the desired magnetic material continuously through the spools 5 and 6,
enough turns of this ribbon being made to furnish the, desired cross-section of the This ribbon may be made of electrolytic iron ,or mild steel," rolled down to a thickness of about 1 mil and eninsulation between the'turns of the ribbon.
Surrounding. the coils 1 and 2 is a winding made up of portions 7 and 8 wound in opposite directions. The winding 7, 8 is connected in series with a radiating antenna 9, which is supplied with high frequency current froma' source 10 through the usual coupling transformer. 11. The source 10 may be ,of any'form desired; a high frequency alternator, an arc generator, or a va-cuumtube generatohwModulation of the antenna current is effected by supplying a telephone current by means of a transmitter 12, and a local battery '13 to the windings l and 2.
What I claim as new and desire to secure by-L'ettersPatent of the United States,
vIQThe method of constructing a magnetic .device for modulating .high frequency currents which consists in Winding two similar coils, placing the'two coils side by side, and forming a continuous magneticcore for the magneticfield which may be produced by currents flowing in said 'coilsf'by threading a thin ribbon of magneticmaterial through said oils. q
2.- The method of constructing a -magnetic device for modulating high" frequency currents which consists in, winding two .PATENT' OFFICE.
scnENEc'rAnY, NEw'Yonx, AssIGNoR To GENERAL ELECTRIC COMPANY, A CORPORATION 01- NEW YORK.
'ameled, the enamel furnishing the desired similar coils, placing thetwocoils side by side, and forming a continuous magnetic core for the magnetic field which may be produced by currents flowing in. said coils by threading a thin ribbon. of magnetic material through said coils, and winding a coil around, both-of said first mentioned coils either before or after the magnetic core is formed. 1
,3, The combination in a modulator of-a pair-of similar coils side by side, a core for the magnetic field which may be produced formed of a continuous thin ribbon. of magnetic material threaded throughsaid coils, a winding surrounding both of said coils, and means for supplying high frequency currents to said surrounding winding.
5. The combination in a signaling system of a pair of similar coils side by side, means for supplying audio frequency signaling currents to said coils, a core for the magnetic field produced by'saidsignaling currents formed of a continuous thin ribbonof magnetic material threaded through said coils, a Winding surrounding both of said coils, a transmitting circuit in Which the surrounding winding is included, and means for supplying high frequency currents to said transmitting circuit.
In witness whereof, I have hereunto set my hand this 6th dayof January, 1922..
JOHN B. PRATT.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US528845A US1449871A (en) | 1922-01-12 | 1922-01-12 | Modulator |
FR26910D FR26910E (en) | 1922-01-12 | 1922-09-30 | Improvements in means of controlling high frequency currents |
GB457/23A GB191724A (en) | 1922-01-12 | 1923-01-05 | Improvements in or relating to magnetic modulators for high-frequency currents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US528845A US1449871A (en) | 1922-01-12 | 1922-01-12 | Modulator |
Publications (1)
Publication Number | Publication Date |
---|---|
US1449871A true US1449871A (en) | 1923-03-27 |
Family
ID=24107420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US528845A Expired - Lifetime US1449871A (en) | 1922-01-12 | 1922-01-12 | Modulator |
Country Status (3)
Country | Link |
---|---|
US (1) | US1449871A (en) |
FR (1) | FR26910E (en) |
GB (1) | GB191724A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2974277A (en) * | 1958-12-16 | 1961-03-07 | Maico Electronics Inc | Magnetic field sensing device |
-
1922
- 1922-01-12 US US528845A patent/US1449871A/en not_active Expired - Lifetime
- 1922-09-30 FR FR26910D patent/FR26910E/en not_active Expired
-
1923
- 1923-01-05 GB GB457/23A patent/GB191724A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2974277A (en) * | 1958-12-16 | 1961-03-07 | Maico Electronics Inc | Magnetic field sensing device |
Also Published As
Publication number | Publication date |
---|---|
GB191724A (en) | 1924-02-21 |
FR26910E (en) | 1924-03-20 |
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