US1591660A - Radioreception - Google Patents
Radioreception Download PDFInfo
- Publication number
- US1591660A US1591660A US745276A US74527624A US1591660A US 1591660 A US1591660 A US 1591660A US 745276 A US745276 A US 745276A US 74527624 A US74527624 A US 74527624A US 1591660 A US1591660 A US 1591660A
- Authority
- US
- United States
- Prior art keywords
- wound
- tho
- coil
- turns
- primary
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
Definitions
- Radio frequency transformers provided with this improved feature may be used in different arrangements of circuit and hook ups and in systems of simple arrangement as WGil as those which are more compiicatcd and elaborate.
- a thin shell such as a bakelite tube
- the primary consists of a smaller number of turns ofwire closely Wound into a single helix and placed Within one end of the tube on which the secondary is placed, both primary secondary being wound in the some direction, d e third coii preferably consisting of 9, single helix of Wire hav ing its turns; closely Wound in the oppositc direction, the number of turns of the third coiii being intermediate in number between cw. of the rimary and secondary, and the third coil being placed immcdiately outside of e socondory coil. and oithe opposite end tlicieof from'thc position of the primary.
Description
July 6 1926. 1,591,660
H. CORY RADIORECEI-TION Filed Oct. 25', 1 924 Eel/Fey 60m.
I 12:1 c Paitcnicc clunky I M n-049cm GE? GHIECAGQ, 11114335501 ELAIJIQRFIGEPTIGN. v
scni invcntiou lino to do with im in radio 1'. :cniion. in has to do cspccicliy iviiii imgn-o'i emenis in the IQq'jfifr iiion of vcry iiigii frcqucncy radio Waves such as arc used for ti'ci'isinission oi signal and More fcziiwurcs of the pros cni; invc opiiccoic :fiiic rcccption L i. counii and Will pol iiiculm'ly d.
tcrcii m 'cz-vicc. Tiifiofi operating con-- diiions e o. "W Go vcricizicn in tlic frco ucnc iigtli. of she radio fro quoncy on 7 so H, Wide variation. in 'iilii') load. on the radio fi ec ncncy ircnsiiorincr occasioned, by
vai-icioic ioading oi tiic vacuum. ibuiccs.
When "using: gnrcvicns foi ins of Radio frequency ti'cnsiormczg fincro is gcncrally produccd an annoying Screech oi' howl when the tuning condensci's sn'c adjusted to can tnin capaoicy miucs; ci." a diifei'cnt but equally annoying noicc in the loud speaker whcn on iiianic s curiicn't in the vacuum iubc uccd frci' ncncy a'mplificaiion incrcoscd above a ccla't'ain definite value.
Various theories have. been advanced as to iJliQ iih'iGiS reason for chose objectionable effects, but 'w izhoijic izlic'nccd of considering ino some in dc i, it may oc stated here that by using no mo :ncqucncy trains-"formers coo-- bodying inc fcciorcs of the present invention I have oco-n able to iargciy and often fully cyciccn'ic ilic c'forcsziid objectionable col-cots in many whom they previously oxis'icifi, and over of Wzwo length and radio frequency und load for inexcess of inc mmzncrcici. demands of the circuit.
1'. lm-vc discovered. that the above mon- Lioncd oio'jsctionniilc cfi ccts, as Well as others, may no ovcircomc o2" eiiminatcd by provid ing; tho i'cdic liroqncncy iamnsfcmicr itself with on odditionci third coil of proper oils-mics: 223cc catcher 533, 19%.
o large number of 50 "no toned, and iii sizc and properly rclcicd to tho primary and sccondory coils and properly arranged, the presence of which third coil has boon actuaL ly and rcpcatcdly demonstrated in practice to fully overcome the above n'lcntioned cl)- jcctionolile features and provide a. greatly impi'ovcd opcration'in oil conditions.
Radio frequency transformers provided with this improved feature may be used in different arrangements of circuit and hook ups and in systems of simple arrangement as WGil as those which are more compiicatcd and elaborate.
In cctuai practice I have discovered that by building ihc radio frequency transformer with both its primary and secondary coils Wound in tho some dircction, and then by "placing a i-l'lll'fl Winding in juxtaposition to tho aforesaid windings, said third winding being preferably Wound in the opposite dix'cciion compared to the prinmry and secondary, and. tho terminals of said third win-dingbeing left open circuitcd, very remarkable improvement in operation of the receiving circuii. is produced provided the coils of the transformers are properly relnted to each other. In izhis connection, I have obtaincd very satisfactory results if t'hc secondary coil. is composed of a singlelieiix of closely Wound who placed on the outside of a thin shell, such as a bakelite tube, and the primary consists of a smaller number of turns ofwire closely Wound into a single helix and placed Within one end of the tube on which the secondary is placed, both primary secondary being wound in the some direction, d e third coii preferably consisting of 9, single helix of Wire hav ing its turns; closely Wound in the oppositc direction, the number of turns of the third coiii being intermediate in number between cw. of the rimary and secondary, and the third coil being placed immcdiately outside of e socondory coil. and oithe opposite end tlicieof from'thc position of the primary.
In a given. instance sevcntyfive turns 0! N01 2 2 double cotton covered copper wire W .cc Wound on tho (mi/side of a Bakelite tuEc 2% inches outside diameter and 2 4 inches inside diameter and 3 inches long. Tiiis winding constiutcd doc secondary of the iui-unsi'ormcr. Eleven turns of No. 24 double cotton covered copper wire were wound on a mandril of such diameter that the finished coil wonid jus'i enter the bake-
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US745276A US1591660A (en) | 1924-10-28 | 1924-10-28 | Radioreception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US745276A US1591660A (en) | 1924-10-28 | 1924-10-28 | Radioreception |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1591660A true US1591660A (en) | 1926-07-06 |
Family
ID=24996003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US745276A Expired - Lifetime US1591660A (en) | 1924-10-28 | 1924-10-28 | Radioreception |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1591660A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2619588A (en) * | 1948-05-07 | 1952-11-25 | Nowak Karl | Highly selective receiver circuit |
| US2788495A (en) * | 1953-07-09 | 1957-04-09 | Du Mont Allen B Lab Inc | Coupling circuit |
| US5331271A (en) * | 1991-02-13 | 1994-07-19 | U.S. Philips Corporation | Compensation scheme for reducing effective transformer leakage inductance |
-
1924
- 1924-10-28 US US745276A patent/US1591660A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2619588A (en) * | 1948-05-07 | 1952-11-25 | Nowak Karl | Highly selective receiver circuit |
| US2788495A (en) * | 1953-07-09 | 1957-04-09 | Du Mont Allen B Lab Inc | Coupling circuit |
| US5331271A (en) * | 1991-02-13 | 1994-07-19 | U.S. Philips Corporation | Compensation scheme for reducing effective transformer leakage inductance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1591660A (en) | Radioreception | |
| US2051012A (en) | Permeability tuning means | |
| US3609613A (en) | Low loss transmission-line transformer | |
| US2562654A (en) | Circuit for coupling an antenna of a television receiver to a pair of power line wires and balancing out unwanted signal reflections present in the wires | |
| US2860312A (en) | Antenna input transformer | |
| US2452679A (en) | Radio-frequency transformer | |
| US4074210A (en) | Distribution type delay line | |
| US2213328A (en) | Permeability tuning | |
| US1690228A (en) | High-frequency transformer | |
| US2258147A (en) | Coupling circuit | |
| US1718255A (en) | Apparatus for wireless telephony and telegraphy | |
| GB207649A (en) | Improvements in electrical condensers and the like | |
| US2261778A (en) | Radio tuning | |
| US1642488A (en) | Electrical coil | |
| US1781776A (en) | Radio frequency transformer | |
| US1887470A (en) | Electromagnetic coupling device or electrical transformer | |
| US2727149A (en) | Balanced multisection inductance units for high frequency signal systems and the like | |
| US2027861A (en) | Coupling coil | |
| US3222623A (en) | Coaxial line tuner having two spaced adjustable shunt inductors | |
| US1931737A (en) | Electron tube with electromagnetic grid control | |
| US1933402A (en) | Double band receiver | |
| US1792375A (en) | Inductance coil | |
| US1978599A (en) | Variable inductance device | |
| US1980713A (en) | Radio receiving system | |
| JPH07161533A (en) | Pulse transformer |