GB329493A - Improvements in and relating to loud speakers - Google Patents

Improvements in and relating to loud speakers

Info

Publication number
GB329493A
GB329493A GB1393429A GB1393429A GB329493A GB 329493 A GB329493 A GB 329493A GB 1393429 A GB1393429 A GB 1393429A GB 1393429 A GB1393429 A GB 1393429A GB 329493 A GB329493 A GB 329493A
Authority
GB
United Kingdom
Prior art keywords
armature
spring
opposed
coils
aperture
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
GB1393429A
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.)
CHARLES PERCIVAL HALL
Original Assignee
CHARLES PERCIVAL HALL
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 CHARLES PERCIVAL HALL filed Critical CHARLES PERCIVAL HALL
Priority to GB1393429A priority Critical patent/GB329493A/en
Publication of GB329493A publication Critical patent/GB329493A/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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

329,493. Hall, C. P., and Hough, T. May 4, 1929. Magnetic instruments.-Relates to an electromagnetic driving unit for a loud-speaker of the kind in which an elongated or strip-like armature 11 embraced by a coil or coils 5 and resiliently supported at its ends, has each end disposed in a gap between a pair of opposed pole shoes 18 on a permanent magnet or magnets 7, 8, each opposed pair of pole shoes being of opposed polarity, while the polarity of those diagonally situated is the same, the armature being adapted to vibrate bodily in the direction of length of the rod 9 connecting it with the diaphragm. According to the invention, the armature is supported by transverse blade or plate springs 13 carried by brackets 14 which can be adjusted to centre the armature in the air gaps either by a common adjusting means or separately by the spring controlled screws 15 carried by the base plate 6. In order to enable the tension of the springs 13 to he adjusted, one end of each spring is fixed on the end of a pillar 16 mounted in a hole in its respective bracket with sufficient clearance to allow it to be moved sideways by an adjusting screw 17, the other end of each spring being fixed to its bracket14. The coils 5 are mounted in grooves 2 in a frame 1 comprising a central portion 8 and flanges 4, the armature extending through an aperture in the frame as shown in Fig. 2 and the rod 9 passing through an aperture 10 in the portion 3.
GB1393429A 1929-05-04 1929-05-04 Improvements in and relating to loud speakers Expired GB329493A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1393429A GB329493A (en) 1929-05-04 1929-05-04 Improvements in and relating to loud speakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1393429A GB329493A (en) 1929-05-04 1929-05-04 Improvements in and relating to loud speakers

Publications (1)

Publication Number Publication Date
GB329493A true GB329493A (en) 1930-05-22

Family

ID=10032022

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1393429A Expired GB329493A (en) 1929-05-04 1929-05-04 Improvements in and relating to loud speakers

Country Status (1)

Country Link
GB (1) GB329493A (en)

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