US1760527A - Electrical device - Google Patents

Electrical device Download PDF

Info

Publication number
US1760527A
US1760527A US174355A US17435527A US1760527A US 1760527 A US1760527 A US 1760527A US 174355 A US174355 A US 174355A US 17435527 A US17435527 A US 17435527A US 1760527 A US1760527 A US 1760527A
Authority
US
United States
Prior art keywords
armature
casing
damping
vane
liquid
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
US174355A
Other languages
English (en)
Inventor
Lewis T Robinson
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.)
General Electric Co
Original Assignee
General Electric Co
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 to NL29665D priority Critical patent/NL29665C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US174355A priority patent/US1760527A/en
Priority to GB6884/28A priority patent/GB286719A/en
Priority to FR651366D priority patent/FR651366A/fr
Priority to DEA53496D priority patent/DE546861C/de
Priority to BE349551A priority patent/BE349551A/fr
Application granted granted Critical
Publication of US1760527A publication Critical patent/US1760527A/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
    • 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

Definitions

  • My invention relates to speech current devices producing phonograph records such as those used reproducing sounds from suchl records or for convertingsound impulses into electrical impules or vice versa.
  • An object of my invention is the provision of an improved device of this character, the moving element of which follows accurately the complex wave form peculiar to sound.
  • Fig.' 1 is a side elevation partly in section of a device illustrating one embodiment of my invention
  • Fig. 2 is a cross sectional view of the same at right angles to that of Fig. 1
  • Fig. 3 is a detail view of an alternative construction.
  • Inasmuc-h as the device herein disclosed is -very small, it has been illustrated on a greatly enlarged scale.
  • rllhe device is shown comprising a built-up frame 1, having a projecting handle portion 2 by which it is supported and having right and left castings 3.
  • the frame l has end plates 4, a top plate 5 and a bottom plate 6 forming therewith a hollow member or casing containing the moving system and the damping liquid 7, preferably oil.
  • Permanent magnet 8 spans the casin and has its poles engaging pole pieces 9 w ich are set into the castings 3. rIhe pole pieces tending polar projections between which lie the coils 10 forming the winding.
  • the 1aminated soft iron armature 12 is supported in a vertical position between the polar projections by the ligament 13, the-ends of which are secured to the tensioning screws 14 having nuts 14 and being supported by the plates 415 attached to the castings 3.
  • Secured to and extending downwardly from the armature is the rod 16 which carries the stylus 17.
  • the stylus will have a suitable cutting point while if the device is to be used as a pick-up in the reproduction of the recorded sound the stylus will have a point adapted to follow in the record groove.
  • the sylphon diaphram 18 secured at opposite ends to the rod and the plate. The diaphram 18 is very light and flexible so as to offer a minimum resistance to the movements of the rod 16 yet effectively to retain the damping liquid.
  • Member 24 is shown supported on the screw stud 25 extending through the top plate 5 and through the strap 26 between which and the top plate is the nut 27. By rotating the nut, the position of the member 24: may be varied from without .the casing. It will be noted that the lower edges of member 24 are rounded off to conform to the curved edges of the armature and the polar projections when the member is in its extreme lowermost position.
  • a phonograph device of the character described comprising a magnet, an armature mounted to vibrate adjacent thereto, a stylus, a connection between the stylus and the armature, and a casing containing a ⁇ damping liquid enclosing the armature, said casing having a flexible wall portion through which said connection extends.
  • a phonograph device of the character comprising a magnet, an armature mounted for pivotal movement adjacent thereto, a stylus connected with the armature, a casing containing a damping liquid enclosing the armature and a damping vane carried by the armature in said liquid.
  • a phonograph device comprising a magnet, an armature pivotally mounted adto be moved from without the casing to cover said vane in varying amounts.
  • a phonograph device comprising a permanent magnet, a winding associated with the poles thereof, an armature pivotally mounted adjacent said poles, a vane carried by the armature, a stylus, a connection between the armature and the stylus, a casing forming a chamber enclosing the armature and the vane, an adjustable hollow member adapted to be moved to enclose varying amounts of the vane and means exterior of' the casing for moving the member.
  • a speech current apparatus including means for producing a magnetic field, a casing provided with a flexible wall portion, a damping fiuid in said casing, an armature immersed in said fluid and arranged to move in said field, and a movable member connected to said armature through said fiexi-ble wall portion.
  • a speech current apparatus including means for producing a magnetic field, a casing, a fluid enclosed in said casing, an armature immersed in said fluid and arranged to move in said field, and a member arranged to extend through said casing for moving said armature.
  • a casing containing a damping liquid enclosing the armature, a vane carried by the armature in the liquid, and means for varying the damping effect of the liquid on the vane.
  • a phonograph device comprising a magnet, an armature pivotally m'ounted adjacent thereto, a stylus connected therewith, a casing containing a damping liquid enclosing the armature, a vane carried by the armature in the liquid, and a member associated with the vane for adjusting the damping effect of the liquid on the vane.
  • a phonograph device comprising a magnet, an armature pivotally mounted adjacent thereto, a stylus connected therewith, a casing containing a damping liquid enclosing the armature, a vane carried by the armaturev in the liquid, and a hollow member arranged

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Combined Devices Of Dampers And Springs (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Moving Of Heads (AREA)
  • Fluid-Damping Devices (AREA)
US174355A 1927-03-10 1927-03-10 Electrical device Expired - Lifetime US1760527A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL29665D NL29665C (enrdf_load_stackoverflow) 1927-03-10
US174355A US1760527A (en) 1927-03-10 1927-03-10 Electrical device
GB6884/28A GB286719A (en) 1927-03-10 1928-03-05 Improvements relating to electro-magnetic sound recorders and reproducers
FR651366D FR651366A (fr) 1927-03-10 1928-03-09 Perfectionnements apportés aux dispositifs servant à enregistrer et à reproduire des variations électriques correspondant à des ondes sonores
DEA53496D DE546861C (de) 1927-03-10 1928-03-09 Elektrische Schalldose mit Fluessigkeitsdaempfung fuer Sprechmaschinen
BE349551A BE349551A (fr) 1927-03-10 1928-03-10 Perfectionnements apportés aux dispositifs servant à enrégistrer et à reproduire des variations électriques correspondant à des ondes sonores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US174355A US1760527A (en) 1927-03-10 1927-03-10 Electrical device

Publications (1)

Publication Number Publication Date
US1760527A true US1760527A (en) 1930-05-27

Family

ID=22635864

Family Applications (1)

Application Number Title Priority Date Filing Date
US174355A Expired - Lifetime US1760527A (en) 1927-03-10 1927-03-10 Electrical device

Country Status (5)

Country Link
US (1) US1760527A (enrdf_load_stackoverflow)
DE (1) DE546861C (enrdf_load_stackoverflow)
FR (1) FR651366A (enrdf_load_stackoverflow)
GB (1) GB286719A (enrdf_load_stackoverflow)
NL (1) NL29665C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514379A (en) * 1947-08-25 1950-07-11 Jr Charles R Douglass Electrodynamic recording head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514379A (en) * 1947-08-25 1950-07-11 Jr Charles R Douglass Electrodynamic recording head

Also Published As

Publication number Publication date
GB286719A (en) 1928-11-22
DE546861C (de) 1932-03-21
FR651366A (fr) 1929-02-18
NL29665C (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US2437445A (en) Sound reverberating device
US1760527A (en) Electrical device
US2037255A (en) Electromagnetic translating device
US2441651A (en) Phonograph recording head
US2471542A (en) Phonograph pickup unit using magnetostrictive wire
US2130174A (en) Stringed musical instrument
US1728278A (en) Electromagnetic translating device
US1760647A (en) Electrical pick-up
US2538164A (en) Electromagnetic sound reproducer
US2238863A (en) Translation device for phonographs
US1656781A (en) Production or conversion of sound by or into electric currents
US2110092A (en) Commercial phonograph
US2213936A (en) Electrodynamic pickup
US1733013A (en) Sound-reproducing device
US1905723A (en) Vibration damping device
US1799799A (en) Sound reproducer
US2711322A (en) Phonograph stylus support
US3026429A (en) Low frequency inertia-type pickup
US2543655A (en) Recording pickup having torsion rods
US1773601A (en) Electrical recording apparatus
US1822841A (en) Magnetic pick up
US1787579A (en) Translating device
GB252228A (en) Improved electro-magnetic sound recording apparatus and record produced thereby
US2066133A (en) Wave translating device
US1739228A (en) Electrical reproducer for phonograph records