US1711192A - Electromagnetic reproducer for use with gramophone and the like records - Google Patents

Electromagnetic reproducer for use with gramophone and the like records Download PDF

Info

Publication number
US1711192A
US1711192A US195080A US19508027A US1711192A US 1711192 A US1711192 A US 1711192A US 195080 A US195080 A US 195080A US 19508027 A US19508027 A US 19508027A US 1711192 A US1711192 A US 1711192A
Authority
US
United States
Prior art keywords
armature
reproducer
records
gramophone
electromagnetic
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
US195080A
Other languages
English (en)
Inventor
Woodroffe John Baden
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 US1711192A publication Critical patent/US1711192A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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

Definitions

  • This invention relates to electromagnetic reprodncers fornse with gramop'hone and the like records and suitable for playing such records for example, by means of a thermionic valve, amplifier and loud speaker.
  • Electromagnetic reproducers which may be employed either for playing gramophone or the like records by means of an amplifier and loud speaker or for controlling a radio transmitter for transmission of gramophone records, or, in some cases, for cutting records, normally comprise a magnetic circuit having a moving part adapted to carry a gramophone needle or cutting device, and one or more coils mounted upon said magnetic circuit.
  • the present invention has for its object to provide an electromagnetic reproducer having damping means whereby distortion shall be reduced to aminimum.
  • an electromagnetic reproducer of the kind described is provided with a pivoted armature and damping means comprising one or more leather, rubber or the like straps, each of which is attached to the said armature and to some relatively fixed portion of the apparatus.
  • damping means 30 comprising rubber or the like tubes directly damping the movements of the armature are provided.
  • 1 is a U-shaped permanent magnet provided at or near the end of one limb with a U-shaped pole piece 2 on each limb of which is mounted a coil 3 the said coils being connected in series.
  • the limbs of the pole piece are substantially at right angles to the limbs of the permanent magnet and project towards the second limb thereof.
  • Projecting inwards from the said second limb of the magnet is an arm 4 the inward end of which carries a pivotally mounted armature 5.
  • the said armature is in close proximity to the tips of the U-shaped pole piece, and lies substantially parallel to the limbs of the permanent magnet, the pivot 6 of the said armature being situated at a point opposite the mid-point between the limbs of the pole piece and at right angles to the common plane of the magnet and the said pole piece.
  • a leather, rubber or similar strap or attenuate element 7 is attached at its centre to the upper end of the armature the ends of the said strap being fixed to the sides of cylindrical uprights 8 carried by an ebonite terminal plate 9 or the like, attached to the side of the magnet at the bend thereof.
  • the U-shaped pole piece 2 of Figures 1, 2 and 3 is dispensed with and the coils are mounted each on a pole piece 2' located on either side of the pivoted armature 5,,0ne above and the other below the pivotal point 6.
  • the armature and its pivot are carried by suitable plates 14 or by the arms of a fork formed of non-magnetic material and suitably attached to the magnet.
  • What I'claim is 1.
  • An electromagnetic reproducer suitable for playing gramophone and the like records and comprising an armature adapted to carry a stylus at one end, pivotal mounting means for said armature disposed intermediate the ends of the latter, and damping means comprising an attenuate strap attached to said armature above its pivot and adjacent its other end and to the body of the reproducer.
  • An electromagnetic reproducer suitable for playing gramophone and the like records comprising an armature adapted to carry a stylus at one'end, pivotal mounting means for said armature, and damping means com prising an attenuate strap attached intermediate its ends to said armature above its pivotal axis and adjacent the other end of the latter, and at the-ends of the strap of the reproducer.
  • An electromagnetic reproducer suitable for playing gramophone and the like records comprising an armature adapted to arry a stylus at its lower end, pivotal mounting means for said armature, and dampingmeans comprising a strap attached at its centre to said'armature above its pivotal axis and adjacent the top and at its'ends to the body of the reprodiicerf i 4:.
  • An electromagnetic reproducer suitable for playing'gramophone and the like records and comprising an armature, pivotal mounting means for said armature, damping means “comprising an attenuate strap attached to said armature above its pivotal axis and means on the reproducer to which the ends of the strap are fastened for adjusting the initial tension of said sti-ap i 6.
  • An electromagnetic .reproduc'er suitable for playing 'grainophone and the like records landcompris ng anlarmature adapted to carry a stylus atiits loiver end, pivotal mounting means' for said armature,”damping means eomprising'an attenuate strap attached at its centre to said armature above said a'rmatures pivotal axis and at its ends to the body of the I projducer, and means adjacent the ends of the strapfor adjustingtheinitial tension of said strap.
  • An electromagnetic reproducer suitable for playing gramophone and the like records comprising an armature, pivotal mounting means for said armature, damping means comprising an attenuatestrap attached at its centre to said armature adjacent its top and at its ends to the body of the reproducer, and rubber butters between said armature and said body of the reproducer.
  • An electromagnetic reproducer suitable for playing gramophone and the like records comprising an armature, pivotal mounting means for said armature, damping means comprising a strap attached at its centre to said armatureand at its ends to the body of the reproducer, adjustable pillars mounted in thesaid body of the reproducer for adjusting the initial tension of said strap, and rubber buil'ers between said armature and said body of the reproducer.
  • An electromagnetic reproducer suitable for playing gramophone and the like records comprising an armature, pivotal mountin g means for said arn'iature, damping means comprising a strap attached at its centre to said armature and at its ends to the body of the reproducer, and tubular rubber butiers between said armature and said body of the reproducer.
  • An electromagnetic reproducer suitablefor playing gramophone and the like records and comprising an armature, pivotal mounting means for said armature, dampingmeans comprising-a strap attached at its centre to said armature andat its ends to the body of the reproducer, adjustable pillars mounted in the said body of the reproducer for. ad

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnets (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
US195080A 1927-01-22 1927-05-28 Electromagnetic reproducer for use with gramophone and the like records Expired - Lifetime US1711192A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1961/27A GB289161A (en) 1927-01-22 1927-01-22 Improvements in or relating to electromagnetic reproducers for use with gramophone and the like records

Publications (1)

Publication Number Publication Date
US1711192A true US1711192A (en) 1929-04-30

Family

ID=9731093

Family Applications (1)

Application Number Title Priority Date Filing Date
US195080A Expired - Lifetime US1711192A (en) 1927-01-22 1927-05-28 Electromagnetic reproducer for use with gramophone and the like records

Country Status (4)

Country Link
US (1) US1711192A (enrdf_load_stackoverflow)
BE (1) BE342551A (enrdf_load_stackoverflow)
FR (1) FR634147A (enrdf_load_stackoverflow)
GB (1) GB289161A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE342551A (enrdf_load_stackoverflow)
FR634147A (fr) 1928-02-09
GB289161A (en) 1928-04-23

Similar Documents

Publication Publication Date Title
US1699127A (en) Ear phones
US2049784A (en) Telephone instrument
US1573739A (en) Telephonic device
US1711192A (en) Electromagnetic reproducer for use with gramophone and the like records
US1830801A (en) Magnetic pick-up device
US1689564A (en) Means for the radio-translation of phonographically-recorded sound waves
US1944583A (en) Electrical pick-up
US1792300A (en) Electrodynamic microphone
USRE17186E (en) Poration
US1944258A (en) Sound reproducing instrument
US2501233A (en) Phonograph pickup having permanent magnet armature
US1822841A (en) Magnetic pick up
US1663884A (en) Device for the transmission of vibratory energy
US1731905A (en) Sound-reproducing device
US2030573A (en) Electric control
US2024271A (en) Moving coil electromechanical device
US1547772A (en) Telephone receiver
US1630641A (en) Electric sound reproducer
US1604149A (en) Electrical apparatus
US1682144A (en) Electrical reproducer
US1792554A (en) Electromagnetic instrument
US1622950A (en) Telephone receiver
US1771127A (en) Telephone magnet system
US1688804A (en) Sound-producing apparatus
US1780409A (en) Electromagnetic transmitter