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GB1255926A - Magnetic loop induction arrangements - Google Patents

Magnetic loop induction arrangements

Info

Publication number
GB1255926A
GB1255926A GB53383/67A GB5338367A GB1255926A GB 1255926 A GB1255926 A GB 1255926A GB 53383/67 A GB53383/67 A GB 53383/67A GB 5338367 A GB5338367 A GB 5338367A GB 1255926 A GB1255926 A GB 1255926A
Authority
GB
United Kingdom
Prior art keywords
wires
loop
def
abc
proportional
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
Application number
GB53383/67A
Inventor
Frederick John Pearson
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.)
CORP OF CITY OF COVENTRY
Original Assignee
CORP OF CITY OF COVENTRY
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 CORP OF CITY OF COVENTRY filed Critical CORP OF CITY OF COVENTRY
Priority to GB53383/67A priority Critical patent/GB1255926A/en
Publication of GB1255926A publication Critical patent/GB1255926A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

1,255,926. Inductive signalling. COVENTRY, CORPORATION OF. 11 Feb., 1969 [23 Nov., 1967], No. 53383/67. Heading H4U. In an inductive signalling system wherein a loop ABCDEF extends around a classroom or the like, Fig. 1, the wires ABC and DEF are of higher specific resistance than the cross-wires AF, CD and the connection BE to a microphone amplifier, the resistance per unit length of the cross-wires being about one tenth of that of the wires ABC, DEF. The current in loop BAFE is proportional to the distance BC = ED and the current in loop BCDE is proportional to the distance AB = FE. It is stated that this reduces interference with adjacent loops in the direction XX and to some extent perpendicular to XX. The position of the connections B, E is adjusted to suit working conditions. Two complementary loop arrangements of the type described may be placed together as shown in Fig. 2, to provide a further reduction in interference and may be connected so that points E and B<SP>1</SP> are connected to one amplifier terminal and points E<SP>1</SP> and B to the other.
GB53383/67A 1967-11-23 1967-11-23 Magnetic loop induction arrangements Expired GB1255926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB53383/67A GB1255926A (en) 1967-11-23 1967-11-23 Magnetic loop induction arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB53383/67A GB1255926A (en) 1967-11-23 1967-11-23 Magnetic loop induction arrangements

Publications (1)

Publication Number Publication Date
GB1255926A true GB1255926A (en) 1971-12-01

Family

ID=10467609

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53383/67A Expired GB1255926A (en) 1967-11-23 1967-11-23 Magnetic loop induction arrangements

Country Status (1)

Country Link
GB (1) GB1255926A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2185364A (en) * 1985-12-13 1987-07-15 Terence Henry Leather Communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2185364A (en) * 1985-12-13 1987-07-15 Terence Henry Leather Communication system
GB2185364B (en) * 1985-12-13 1990-05-16 Terence Henry Leather Communication system

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