US2475829A - High-frequency inductive coupling - Google Patents

High-frequency inductive coupling Download PDF

Info

Publication number
US2475829A
US2475829A US684087A US68408746A US2475829A US 2475829 A US2475829 A US 2475829A US 684087 A US684087 A US 684087A US 68408746 A US68408746 A US 68408746A US 2475829 A US2475829 A US 2475829A
Authority
US
United States
Prior art keywords
coils
cylinder
inductive coupling
frequency inductive
groove
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
Application number
US684087A
Inventor
Fennema Pieter Harm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2475829A publication Critical patent/US2475829A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/045—Fixed inductances of the signal type  with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core

Definitions

  • This invention relates to a combination of at least two coils arranged in a cylinder.
  • This invention relates to a combination of at least two coils arranged in a cylinder.
  • the two coils wound on frames are arranged inside the cylinder and in which the portion of the cylinder at the height of the middle between these coils comprised a depressed groove.
  • This groove constitutes somewhat of a diaphragm whereby the field coupling the coils could be reduced. It has been found that the possibility of adjustment in this construction is too small.
  • the coils are mounted displaceably within the shield can or the can consists of two parts, one of which slides with respect to the other, each part carrying one of the coils.
  • This type of construction is relatively complicated and expensive.
  • the object of this invention is to provide a simple and inexpensive coil system in which ample control oi the coupling between coils is provided by'varying the distance between the coils.
  • two coils are each secured at a different location on the wall of a cylinder with the wall separating the coils easily deformable in order to alter the distance between the cells.
  • a metal cylinder 1 In the vicinity of the ends of a metal cylinder 1 are arranged two dish-shaped insulating rings 2 which are, for example, of artificial resin.
  • the cylinder comprises two grooves 4 in the vicinity of the adjacent edges of the insulating rings, whereas at the other side of the dish-shaped rings the cylinder is flanged in 5. These rings are thus firmly secured in the cylinder.
  • Two little tubes 6, for example of pertinax, are clamped in the dish-shaped rings.
  • the coils l are wound on these little tubes, while little rods 8 of high-frequency iron are fastened in the said tubes by means of a small quantity of compound indicated by '9;
  • the lower dish-shaped ring 2 comprises a projecting part II) which is provided with screwthread and carries a nut ll pressed from sheet metal. With the aid of these parts the combination is fastened on a chassis-plate l2.
  • the distance between the two coils is determined by the shape of the cylinder between these coils.
  • This portion of the cylinder comprises not only grooves 4, by means of which the .coils are fastened, but also a third groove IS. The latter is provided when the combination is completed.
  • the groove may also be provided preliminarily in the cylinder and the electrical properties may be changed afterwards by depressing or extending the cylinder.
  • the cylinder could comprise a certain number of apertures l4, placed in a circle, in such manner that the two halves are connected by means of a certain number of narrow metal strips 15 and can be displaced relatively to each other by deforming these strips.
  • apertures are provided, however, it will generally be necessary to provide an additional shield.
  • a coil system comprising a hollow cylindrical member, a plurality of coil members each secured to a separate portion of the inner wall of said cylindrical member, and an easily permanently deformable integral wall portion of said cylindrical member separating each of said coil members for altering the distance between the said coil members.
  • a coil system comprising a hollow cylindrical member, a plurality of coil members each secured to a separation portion of the inner wall of said cylindrical member, and an easily permanently deformable integral wall portion of said cylindrical member provided with an annular groove separating each of said coil members for altering the distance between the said coil members.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

July 12, 1949. 59,, H FE 2,475,829
HIGH-FREQUENCY INDUGTIVE COUPLING Filed July 16, 1946 Patented July 12, 1949 2,475,829 HIGH-FREQUENCY INDUCTIVE COUPLING Pieter Harm Fennema, Eindhoven, Netherlands, assignor to Hartford National Bank and Trust Company,
Application July Hartford, Conn, as trustee 16, 1946, Serial No. 684,087
In the Netherlands January 28, 1943 Section 1, Public Law .690, August 8, 1946 Patent expires January 28, 1963 3 Claims. (Cl. 171-119) This invention relates to a combination of at least two coils arranged in a cylinder. When such combinations are manufactured in large quantities, it is in most cases necessary for the properties of the combinations to be made exactly equal to one another. In order to be able to adjust the relative inductance of these coils, a construction was previously suggested in which the two coils wound on frames are arranged inside the cylinder and in which the portion of the cylinder at the height of the middle between these coils comprised a depressed groove. This groove constitutes somewhat of a diaphragm whereby the field coupling the coils could be reduced. It has been found that the possibility of adjustment in this construction is too small.
In another known construction the coils are mounted displaceably within the shield can or the can consists of two parts, one of which slides with respect to the other, each part carrying one of the coils. This type of construction is relatively complicated and expensive.
The object of this invention is to provide a simple and inexpensive coil system in which ample control oi the coupling between coils is provided by'varying the distance between the coils.
According to the invention two coils are each secured at a different location on the wall of a cylinder with the wall separating the coils easily deformable in order to alter the distance between the cells.
The invention will be explained more fully by reference to the accompanying drawing showing, by way of example, a section of a combination according to the invention. a
In the vicinity of the ends of a metal cylinder 1 are arranged two dish-shaped insulating rings 2 which are, for example, of artificial resin. The cylinder comprises two grooves 4 in the vicinity of the adjacent edges of the insulating rings, whereas at the other side of the dish-shaped rings the cylinder is flanged in 5. These rings are thus firmly secured in the cylinder. Two little tubes 6, for example of pertinax, are clamped in the dish-shaped rings. The coils l are wound on these little tubes, while little rods 8 of high-frequency iron are fastened in the said tubes by means of a small quantity of compound indicated by '9; The lower dish-shaped ring 2 comprises a projecting part II) which is provided with screwthread and carries a nut ll pressed from sheet metal. With the aid of these parts the combination is fastened on a chassis-plate l2. As can be seen from the drawing, the distance between the two coils is determined by the shape of the cylinder between these coils. This portion of the cylinder comprises not only grooves 4, by means of which the .coils are fastened, but also a third groove IS. The latter is provided when the combination is completed. To this end it is placed on a device which is constituted by a combination of a lathe by means of which the groove may be provided and a measuring device by means of which the electrical properties of the combination may be ascertained. During the depression of groove l3, the changes in the electrical properties of the coils may thus be followed.
The groove may also be provided preliminarily in the cylinder and the electrical properties may be changed afterwards by depressing or extending the cylinder.
It is evident that methods of deformation of the cylinder other than by means of a depressed groove are also possible. The cylinder could comprise a certain number of apertures l4, placed in a circle, in such manner that the two halves are connected by means of a certain number of narrow metal strips 15 and can be displaced relatively to each other by deforming these strips. When such apertures are provided, however, it will generally be necessary to provide an additional shield.
What I claim is: 1. A coil system comprising a hollow cylindrical member, a plurality of coil members each secured to a separate portion of the inner wall of said cylindrical member, and an easily permanently deformable integral wall portion of said cylindrical member separating each of said coil members for altering the distance between the said coil members.
2. A coil system comprising a hollow cylindrical member, a plurality of coil members each secured to a separation portion of the inner wall of said cylindrical member, and an easily permanently deformable integral wall portion of said cylindrical member provided with an annular groove separating each of said coil members for altering the distance between the said coil members.
PIETER HARM FENNEMA.
anrmancns crrnn The following references are of record in the file of this patent:
5 UNITED STATES PATENTS Number Name Date 2,914,820 Snider Sept. 17, 1935 R0 FOREIGN PATENTS Number Country Date 139,211 Great Britain Sept. 23, 1920
US684087A 1943-01-28 1946-07-16 High-frequency inductive coupling Expired - Lifetime US2475829A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2475829X 1943-01-28

Publications (1)

Publication Number Publication Date
US2475829A true US2475829A (en) 1949-07-12

Family

ID=19874331

Family Applications (1)

Application Number Title Priority Date Filing Date
US684087A Expired - Lifetime US2475829A (en) 1943-01-28 1946-07-16 High-frequency inductive coupling

Country Status (1)

Country Link
US (1) US2475829A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2850709A (en) * 1954-04-28 1958-09-02 Int Standard Electric Corp High frequency electric transformers
US2958930A (en) * 1956-06-12 1960-11-08 Jr Vincent M Heazel Receiver input transformer and method of making the same
US3662306A (en) * 1971-03-24 1972-05-09 Gen Instrument Corp Adjustably coupled radio frequency transformer
US4523147A (en) * 1981-07-31 1985-06-11 Consiglio Nazionale Delle Ricerche Fine balancing second derivative gradiometer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB139211A (en) * 1918-07-01 1920-09-23 Siemens Ag Improvements in pressure gauges
US2014820A (en) * 1932-09-23 1935-09-17 Rca Corp Variometer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB139211A (en) * 1918-07-01 1920-09-23 Siemens Ag Improvements in pressure gauges
US2014820A (en) * 1932-09-23 1935-09-17 Rca Corp Variometer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2850709A (en) * 1954-04-28 1958-09-02 Int Standard Electric Corp High frequency electric transformers
US2958930A (en) * 1956-06-12 1960-11-08 Jr Vincent M Heazel Receiver input transformer and method of making the same
US3662306A (en) * 1971-03-24 1972-05-09 Gen Instrument Corp Adjustably coupled radio frequency transformer
US4523147A (en) * 1981-07-31 1985-06-11 Consiglio Nazionale Delle Ricerche Fine balancing second derivative gradiometer

Similar Documents

Publication Publication Date Title
US2786983A (en) High-voltage transformer
US1889398A (en) Electrical coil and a method of manufacturing it
US2865086A (en) Method of making a toroidal magnetic device
US2375309A (en) High-frequency transformer
US2475829A (en) High-frequency inductive coupling
US3430169A (en) Deflection yoke
US2051012A (en) Permeability tuning means
GB555735A (en) Improvements in or relating to signal collecting systems for radio receivers
ES407411A1 (en) Colour television display apparatus provided with a cathode-ray tube
GB994135A (en) Improvements in or relating to electromagnetic forming apparatus
US2417182A (en) Short-wave permeability tuning system
US2064772A (en) High-frequency coil with adjustable inductance value
US2485666A (en) Transformer
US2488961A (en) Method of making magnetic gores
US2646552A (en) Variable transformer
US3390364A (en) Variable reactor having coil and signal coils on toroidal core
US2544152A (en) High-frequency coil system
US1905216A (en) Radio receiving apparatus
US1550889A (en) Induction device and magnetic circuits for the same
US2438770A (en) Adjustable mutual coupling
US2837726A (en) Reluctance tuned radio frequency coil
US2895066A (en) Traveling wave tube
US1947484A (en) Means for changing the wave form of alternating currents
US2870334A (en) Plural section magnetically variable inductor with frequency tracked systems
US2567717A (en) Transformer