US1522657A - Magnetic sound box for phonographs and the like - Google Patents

Magnetic sound box for phonographs and the like Download PDF

Info

Publication number
US1522657A
US1522657A US565766A US56576622A US1522657A US 1522657 A US1522657 A US 1522657A US 565766 A US565766 A US 565766A US 56576622 A US56576622 A US 56576622A US 1522657 A US1522657 A US 1522657A
Authority
US
United States
Prior art keywords
phonographs
box
magnetic
sound
sound box
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
US565766A
Inventor
Stille Curt
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.)
TELEGRAPHIEGESELLSCHAFT SYSTEM STILLE mbH
TELEGRAPHIEGMBH SYSTEM STILLE
Original Assignee
TELEGRAPHIEGMBH SYSTEM STILLE
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 TELEGRAPHIEGMBH SYSTEM STILLE filed Critical TELEGRAPHIEGMBH SYSTEM STILLE
Application granted granted Critical
Publication of US1522657A publication Critical patent/US1522657A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/001Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor with vibrating mechanical coupling means between pick-up element and sound producing element
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00Transducers of moving-armature or moving-core type
    • H04R11/08Gramophone pick-ups using a stylus; Recorders using a stylus

Definitions

  • Patented Jan. is, 1925.
  • the present invention relates to a soundbox for phonographs and the like and of the kind in which the sound vibrations are transmitted by electro-magnetic means as in a telephone transmitter, and consists in the provision of a disc supported at the mouth of the sound-box and supporting a box magnet as well as a diaphragm which is connected to the stylus bar and whlch carries an armature, the disc, which, together with the armature completes the magnetic circuit of the magnet, being larger than the latter and the diaphragm.
  • the small dlaphragm will have a high natural fr equency
  • Fig. l represents a sectional view of the improved sound-box
  • i Fig. 2 a diagram of the electric clrcuits for the use with direct currents.
  • Fig. 3 is a similar diagram of the arrangement for use with alternatlng current.
  • a disc 4 Supported between two rubber rings 16 at-the mouth of a sound-box casing 1, is a disc 4 made of highly permeable material such as iron or the like, which carries, inside the sound-box, a box magnet 2 of smaller diameter than the disc.
  • the magnet has a central and a circumferential pole and is connected to the disc by means of the latter.
  • On the outside of the disc is mounted a small mica diaphragm 6, which is connected to the stylus bar 7 and which carries at the inside and opposite the bar connection, an armature '5, the latter'being held, with suflicient free play, in an aperture in the disc 4 and close to the central Together with the armature 5, the disc 4 completes the mag-' netic circuit of the magnet.
  • the magnet has a coil 3 associated therewith.
  • the rubber rings 16 insulate the disc electrically and prevent a transmission of extraneous vibrations.
  • the stylus bar 7 is placed on the record 17 in the usual manner and transmits the vibrations picked up from the latter to the diaphragm 6.
  • the vibrations of the dia-' .phragm and of the armature 5 By the vibrations of the dia-' .phragm and of the armature 5, the number of magnetic lines in the field will be subjected to alterations, and equivalent induction currents will be set up in the coil 3.
  • the primary, coil .11 of a transformer is ineluded in the electric circuit of the coil 3, and the secondary coil 12 of the transformer is in circuit with the receiver 13 of a condenser telephone; The latter reproduces themriginal sound without distortion and without extraneous noises.
  • an inductance coil 14 and a capacity 15' are arranged in the secondary circuit to produce syntony or tuning.
  • the box magnet may in addition be pro vided with afield winding for separate excitation.
  • a magnetic sound-box for phonographs and the like comprising a casing, a member made of permeable material and located in said casing, magnetic means having an inner part and peripheral part and adapted to be supported from said perme able member by the attraction produced by the force of ma etic induction, a re-. silient diaphragm ai ig acent said member, said permeable member being of greater a diameter than said diaphragm and said magnetic means, an armature made of permeable materlal and pr0 ect1ng throu h an opening 1n said permeable member an having its end lecated adj acent said inner part,

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Description

C. STILLE MAGNETIC SOUND BOX FOR PHONOGRAPHS AND THE LIKE Filed June 5, 1922 Receiver Receiver Reef/f; caf/on Cell pole of the magnet.
Patented Jan. is, 1925.
UNITED STATES PATENT OFFICE.
cum: STILLE, or BEBLIN-ZEHLENDORF, GERMANY, AssIGNon r0 'rnnnonarnmensmnscmn'r m nmcnninxrrm nan-rune srsrnmsrrnnn, on BERLIN, enn- MANY.
M A GNETIGSOUND BOX FOR PHONOGRAPHS AND THE LIKE.
Application filed June 3, 1922. Serial No. 565,786.
To all whom it may cmwem:
Be it known that I, OURT STILLE, a citizen of the German Republic, residing at Berlin- Zehlendorf, Germany, have invented certain Improvements in Magnetic Sound Boxes for Phonographs and the like, of which the following 1s a specification.
The present invention relates to a soundbox for phonographs and the like and of the kind in which the sound vibrations are transmitted by electro-magnetic means as in a telephone transmitter, and consists in the provision of a disc supported at the mouth of the sound-box and supporting a box magnet as well as a diaphragm which is connected to the stylus bar and whlch carries an armature, the disc, which, together with the armature completes the magnetic circuit of the magnet, being larger than the latter and the diaphragm.
By this arrangement, the small dlaphragm will have a high natural fr equency,
and the magnet will have. a great capacity in converting the diaphragm vibrations 1nto electrical energy, with the result that .a greatly amplified and pure sound will be obtained. A
In the accompanying drawings,
Fig. l'represents a sectional view of the improved sound-box, and i Fig. 2, a diagram of the electric clrcuits for the use with direct currents.
Fig. 3 is a similar diagram of the arrangement for use with alternatlng current.
Supported between two rubber rings 16 at-the mouth of a sound-box casing 1, is a disc 4 made of highly permeable material such as iron or the like, which carries, inside the sound-box, a box magnet 2 of smaller diameter than the disc. The magnet has a central and a circumferential pole and is connected to the disc by means of the latter. On the outside of the disc is mounted a small mica diaphragm 6, which is connected to the stylus bar 7 and which carries at the inside and opposite the bar connection, an armature '5, the latter'being held, with suflicient free play, in an aperture in the disc 4 and close to the central Together with the armature 5, the disc 4 completes the mag-' netic circuit of the magnet. The magnet has a coil 3 associated therewith. The rubber rings 16 insulate the disc electrically and prevent a transmission of extraneous vibrations.
The stylus bar 7 is placed on the record 17 in the usual manner and transmits the vibrations picked up from the latter to the diaphragm 6. By the vibrations of the dia-' .phragm and of the armature 5, the number of magnetic lines in the field will be subjected to alterations, and equivalent induction currents will be set up in the coil 3. The primary, coil .11 of a transformer is ineluded in the electric circuit of the coil 3, and the secondary coil 12 of the transformer is in circuit with the receiver 13 of a condenser telephone; The latter reproduces themriginal sound without distortion and without extraneous noises.
When direct current is employed in the condenser telephone, an inductance coil 14 and a capacity 15' are arranged in the secondary circuit to produce syntony or tuning.
If an alternating current is used in the condensertelephone, a rectification of the current is effected by means of a rectification .cell 18, as shown in Fig. 3.
The box magnet may in addition be pro vided with afield winding for separate excitation.
I claim:-
1. A magnetic sound-box for phonographs, and the like, comprising a casing, a member made of permeable material and located in said casing, magnetic means having an inner part and a peripheral part and adapted to be supported from said permeable member by the attraction produced by the force of magnetic induction, a resilient diaphragm adjacent said member, an armature made of permeable material and projecting through an opening in said permeable member and having its end located adjacent said inner part, and a movable bar connected to said diaphragm.
2. A magnetic sound-box for phonographs and the like, comprising a casing, a member made of permeable material and located in said casing, magnetic means having an inner part and peripheral part and adapted to be supported from said perme able member by the attraction produced by the force of ma etic induction, a re-. silient diaphragm ai ig acent said member, said permeable member being of greater a diameter than said diaphragm and said magnetic means, an armature made of permeable materlal and pr0 ect1ng throu h an opening 1n said permeable member an having its end lecated adj acent said inner part,
phragm.
DOKTOR CURT STILLE.
Witnesses:
E..NOLT DERMAN,
R. Y. ALLSPACE.
US565766A 1922-05-06 1922-06-03 Magnetic sound box for phonographs and the like Expired - Lifetime US1522657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12847/22A GB195879A (en) 1922-05-06 1922-05-06 Improvements in electro-magnetic sound-boxes for phonographs and the like

Publications (1)

Publication Number Publication Date
US1522657A true US1522657A (en) 1925-01-13

Family

ID=10012210

Family Applications (1)

Application Number Title Priority Date Filing Date
US565766A Expired - Lifetime US1522657A (en) 1922-05-06 1922-06-03 Magnetic sound box for phonographs and the like

Country Status (5)

Country Link
US (1) US1522657A (en)
CH (1) CH100986A (en)
FR (1) FR550978A (en)
GB (1) GB195879A (en)
NL (1) NL11072C (en)

Also Published As

Publication number Publication date
NL11072C (en)
CH100986A (en) 1923-08-16
GB195879A (en) 1923-04-12
FR550978A (en) 1923-03-24

Similar Documents

Publication Publication Date Title
US1522657A (en) Magnetic sound box for phonographs and the like
GB227391A (en) Improvements in or relating to electric apparatus for the reproduction of recorded sounds
US1795948A (en) Reproducing device
GB445935A (en) An improved sound reproducing device
US2073561A (en) Sound reproducing means
US873083A (en) Telegraphone.
US1238439A (en) Telephone for transmitting and reproducing sounds.
US1632332A (en) Electromagnetic sound reproducer
US2285079A (en) Electromagnetic sound-reproducing device
US1414105A (en) Telephone receiver
US1774855A (en) Driving unit for loud-speakers
US2031678A (en) Dynamic microphone
GB261698A (en) Improvements in sound reproducing apparatus
US1630380A (en) Loud-speaker unit
US1735113A (en) Combined electric phonograph recorder and reproducer
US1596045A (en) Sound reproducer
US1655283A (en) Sound-reproduction apparatus
US497649A (en) James p
US2555365A (en) Loud-speaker having auxiliary equipment disposed therein
US227736A (en) Electric telephone
US1030872A (en) Telephone-receiver.
US1739228A (en) Electrical reproducer for phonograph records
US400325A (en) ginochio
US1878232A (en) Sound reproducing device
GB416574A (en) Improvements in and relating to electromagnetic vibratory devices for use in the electrical reproduction of sound