US1718337A - Loud-speaker motor - Google Patents

Loud-speaker motor Download PDF

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Publication number
US1718337A
US1718337A US64596A US6459625A US1718337A US 1718337 A US1718337 A US 1718337A US 64596 A US64596 A US 64596A US 6459625 A US6459625 A US 6459625A US 1718337 A US1718337 A US 1718337A
Authority
US
United States
Prior art keywords
armature
cap
pole pieces
magnet
pole
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
US64596A
Other languages
English (en)
Inventor
Forest Lee De
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.)
UTAH RADIO PRODUCTS Co IN
UTAH RADIO PRODUCTS COMPANY Inc
Original Assignee
UTAH RADIO PRODUCTS Co IN
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 FR623585D priority Critical patent/FR623585A/fr
Application filed by UTAH RADIO PRODUCTS Co IN filed Critical UTAH RADIO PRODUCTS Co IN
Priority to US64596A priority patent/US1718337A/en
Priority to GB26347/26A priority patent/GB260286A/en
Application granted granted Critical
Publication of US1718337A publication Critical patent/US1718337A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • This invention relates in general to loud speaker motors or units of the balanced armature type, for use in vibrating the diaphragm of sound reproducing devices. More partic of such devices. Itis the purpose of my in-.
  • Fig. 1 is a top plan view of a loud speaker unit.
  • Fig. 2 is a bottom plan view of the same device with some of the parts broken away.
  • Fig. 3 is an end elevational view of the device.
  • Fig. 4 is a cross-sectional view taken on the line 44, Fig. 1, looking in the direction of the arrows.
  • Fig. 5 is a view partly in section taken on the line 55 of Fig. 1, and partly in elevation. s
  • Fig. 6 is a cross-sectional view through the pole pieces showing the armature mounting.
  • Fig. 7 is a plan view of the armature mount- Iteferring to Fig. 1, reference numeral 1 indicates a permanent magnet of the wellknown horse-shoe type. Attached transversely across the poles of the magnet 1 are two pole pieces or shoes 2, upon which is mounted cap piece 3. The pole pieces and cap piece are rigidly secured to the poles of the magnet by means of bolts 4.
  • the cap 3 is provided with a. projection 5 on which is se 1 cured an anchor casting 6 by means of a threaded bolt. This anchor casting when mounted on theprojection 5 of the cap piece 3 forms a U-shaped support across the open end of which extends a two-piece resilient reed 7, 7.
  • the armature 8 which extends between the pole pieces 2. Attached atone end of the armature 8 is a non-magnetic rod 9, which is secured at its free end to a nonmagnetic spring member 10 upon which is secured a short arm 11. The spring member 10 is rigidly attached by means of a bolt to the pole piece. Mounted within the pole piece 2 surrounding the armature 8 are two solenoids, 12, 12 which are electrically connected in series by a lead 13, and the free ends of which terminate in connecting leads 14 and 15.
  • a particularly novel feature of my invention consists of the method of mounting the armature on the cap 3.
  • I have provided a simple single casting of non magnetic material 6, which is easily attached to the cap 3 so that in case it is necessary to remove the coils or the armature from the motor unit, it is only necessary to remove one screw and ac cess may then be had to the interior of the device.
  • a permanent magnet In a loud speaker unit, a permanent magnet, transverse pole pieces on said magnet, a cap extending along and secured to the corresponding faces of said pole pieces and spanning the gap therebetween, an armature mounted between said pole pieces, a support mounted on said cap, and a reed mounted on said support and serving as a fulcrum for said armature.
  • a permanent magnet transverse pole pieces on said magnet, a cap extending along and secured to the corresponding faces of said pole pieces and spanning the gap therebetween, an armature mounted betweensaid pole pieces, a nonmagnetic support mounted on said cap extending transversely of it, a resilient reed on said support in which said armature is mounted.
  • a permanent magnet In a loud speaker unit, a permanent magnet, transverse pole pieces on said magnet, a cap extending along and secured to the corresponding faces of said pole pieces and spanning the gap therebetween, an armature mounted between said pole pieces, a
  • a balanced armature motor for sound reproducing devices, the combination of a magnet, pole shoes and cap mounted on said magnet and pole shoes, an armature pivoted between said pole shoes, an anchor casting mounted on said cap, said cap and anchor casting forming a U-shaped support, and a reed mounted across the open end of the U- shaped support forming a support for said armature.
  • a balanced armature motor for sound reproducing devices, the combination of a magnet, pole shoes and cap mounted on said magnet and pole shoes, an armature pivoted between said pole shoes, an anchor casting mounted on said cap, said cap and anchor castmg forming a U-shaped support, a i'AVO'PlGCB resilient reed mounted across the open end of and on said U-shaped support and forming a resilient fulcrum for said armature.
  • a horseshoe type per-' 30 posite the gap between said pole pieces, an L shaped anchor member secured to said projection and extending therefrom across said pole pieces in a direction transverse of said cap, said projection and a leg of said anchor member providing oppositely positioned supbridging the gap-therebetween, a cap resting 45 upon said pole shoes, means to secure the magnet, pole shoes and cap together, a projection upon said cap opposite the gap between said pole shoes, an L-shaped anchor member secured to said projection by readily detachable means, and extending therefrom across said pole pieces in a direction transverse of said cap, said projection and a leg of said anchor member providing at their ends supporting surfaces, a reed supported on said surfaces, and an armature fulcrumed on said reed.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
US64596A 1925-10-24 1925-10-24 Loud-speaker motor Expired - Lifetime US1718337A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR623585D FR623585A (enrdf_load_html_response) 1925-10-24
US64596A US1718337A (en) 1925-10-24 1925-10-24 Loud-speaker motor
GB26347/26A GB260286A (en) 1925-10-24 1926-10-21 Improvements in electro-magnetic units for operating the diaphragm of sound reproducing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64596A US1718337A (en) 1925-10-24 1925-10-24 Loud-speaker motor

Publications (1)

Publication Number Publication Date
US1718337A true US1718337A (en) 1929-06-25

Family

ID=22057011

Family Applications (1)

Application Number Title Priority Date Filing Date
US64596A Expired - Lifetime US1718337A (en) 1925-10-24 1925-10-24 Loud-speaker motor

Country Status (3)

Country Link
US (1) US1718337A (enrdf_load_html_response)
FR (1) FR623585A (enrdf_load_html_response)
GB (1) GB260286A (enrdf_load_html_response)

Also Published As

Publication number Publication date
GB260286A (en) 1927-06-23
FR623585A (enrdf_load_html_response) 1927-06-27

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