GB307847A - Improvements in electromagnetic devices - Google Patents

Improvements in electromagnetic devices

Info

Publication number
GB307847A
GB307847A GB835029A GB835029A GB307847A GB 307847 A GB307847 A GB 307847A GB 835029 A GB835029 A GB 835029A GB 835029 A GB835029 A GB 835029A GB 307847 A GB307847 A GB 307847A
Authority
GB
United Kingdom
Prior art keywords
armature
electrical
pole
electromagnetic devices
assignees
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
GB835029A
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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
Priority claimed from US191012A external-priority patent/US1747829A/en
Priority claimed from US205562A external-priority patent/US1762991A/en
Application filed by Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB307847A publication Critical patent/GB307847A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/16—Mounting or connecting stylus to transducer with or without damping means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Dc Machiner (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electromagnets (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Moving Of Heads (AREA)

Abstract

307,847. Electrical Research Products, Inc., (Assignees of Harrison, H. C.). May 13, 1927, [Convention date]. Void [Published under Sect. 91 of the Acts]. Divided on 290,264. Drawings to Specification. Gramophone pick-ups; magnetic instruments. -An electrical reproducing or recording device has a permanent magnet, one pole of which terminates in a pivoted armature, the other terminating in two pole pieces adapted to form magnetic air.gaps with the armature, one on each side of a plane intersecting the axis of the pivot. The device described is identical with that described in Specification 290,264.
GB835029A 1927-05-13 1928-01-06 Improvements in electromagnetic devices Expired GB307847A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US191012A US1747829A (en) 1927-05-13 1927-05-13 Electrical reproducer
US205562A US1762991A (en) 1927-07-14 1927-07-14 Electromagnetic reproducer or recorder

Publications (1)

Publication Number Publication Date
GB307847A true GB307847A (en) 1930-05-22

Family

ID=26886655

Family Applications (4)

Application Number Title Priority Date Filing Date
GB1369828A Expired GB290290A (en) 1927-05-13 1928-01-06
GB49528A Expired GB290264A (en) 1927-05-13 1928-01-06 Improvements in electromagnetic devices for recording sound and reproducing sound from records
GB835029A Expired GB307847A (en) 1927-05-13 1928-01-06 Improvements in electromagnetic devices
GB49628A Expired GB293847A (en) 1927-05-13 1928-01-06 Improvements in or relating to electromagnetic devices for recording sound and reproducing sound from records

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB1369828A Expired GB290290A (en) 1927-05-13 1928-01-06
GB49528A Expired GB290264A (en) 1927-05-13 1928-01-06 Improvements in electromagnetic devices for recording sound and reproducing sound from records

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB49628A Expired GB293847A (en) 1927-05-13 1928-01-06 Improvements in or relating to electromagnetic devices for recording sound and reproducing sound from records

Country Status (3)

Country Link
DE (1) DE573753C (en)
GB (4) GB290290A (en)
NL (1) NL25222C (en)

Also Published As

Publication number Publication date
DE573753C (en) 1933-04-05
NL25222C (en)
GB290264A (en) 1929-04-08
GB290290A (en) 1929-04-08
GB293847A (en) 1929-04-08

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