GB191310154A - An Improved Telephone Relay. - Google Patents

An Improved Telephone Relay.

Info

Publication number
GB191310154A
GB191310154A GB191310154DA GB191310154A GB 191310154 A GB191310154 A GB 191310154A GB 191310154D A GB191310154D A GB 191310154DA GB 191310154 A GB191310154 A GB 191310154A
Authority
GB
United Kingdom
Prior art keywords
resistance
liquid
currents
jet
telephone relay
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
Inventor
Fabio Majorana
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB191310154A publication Critical patent/GB191310154A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

10,154. Majorana, F. April 30. Telephonic relays.-The currents to be amplified are passed through a wire 1, stretched in a magnetic field N S, and adapted (1) to vary the resistance of a microphonic contact, or (2) to produce varying contractions in a liquid jet and consequent variations in the resistance of a circuit closed through the jet, or (3) to produce changes in the cross-sectional area of a tube 5 through which a liquid flows and consequent variations in the resistance of the circuit 9, 10 including that part of the liquid. The secondary of the induction coil 2, traversed by the currents from the microphone 4, is of low resistance.
GB191310154D 1913-04-30 1913-04-30 An Improved Telephone Relay. Expired GB191310154A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191310154T 1913-04-30

Publications (1)

Publication Number Publication Date
GB191310154A true GB191310154A (en) 1913-08-14

Family

ID=32644577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191310154D Expired GB191310154A (en) 1913-04-30 1913-04-30 An Improved Telephone Relay.

Country Status (2)

Country Link
FR (1) FR476943A (en)
GB (1) GB191310154A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990013171A1 (en) * 1989-04-15 1990-11-01 William Henry Woodward Linear actuator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990013171A1 (en) * 1989-04-15 1990-11-01 William Henry Woodward Linear actuator

Also Published As

Publication number Publication date
FR476943A (en) 1915-09-09

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