[go: up one dir, main page]

GB263480A - Loud speakers - Google Patents

Loud speakers

Info

Publication number
GB263480A
GB263480A GB9735/26A GB973526A GB263480A GB 263480 A GB263480 A GB 263480A GB 9735/26 A GB9735/26 A GB 9735/26A GB 973526 A GB973526 A GB 973526A GB 263480 A GB263480 A GB 263480A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
wood
paper
hopkins
impedance
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
GB9735/26A
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.)
HOPKINS CORP
Original Assignee
HOPKINS CORP
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 HOPKINS CORP filed Critical HOPKINS CORP
Publication of GB263480A publication Critical patent/GB263480A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

263,480. Hopkins Corporation, (Assignees of Hopkins, M. C.). Dec. 22, 1925, [Convention date]. Void [Published under Sect. 91 of the Acts]. Diaphragms. - A large diaphragm for a loud-speaker increases substantially uniformly in thickness from the point of application of the force to the periphery, so that the vibratory impedance of concentric zones increases towards the periphery. Fig. 1a shows a diaphragm having one of plane face 2, and Fig. 2a shows a conical diaphragm. The diaphragm may be made of paper or wood or of the combination of paper and wood. Three-ply fir or balsa wood are suitable materials. The diaphragm may be reinforced by ribs or layers of paper, wood, or the like. The diaphragm may be so designed that imperfections in the electromagnetic movement are corrected, the impedance of zones corresponding to frequencies at which the movement is more, or less, efficient being correspondingly modified.
GB9735/26A 1925-12-22 1926-04-13 Loud speakers Expired GB263480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US263480XA 1925-12-22 1925-12-22

Publications (1)

Publication Number Publication Date
GB263480A true GB263480A (en) 1927-09-13

Family

ID=21831303

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9735/26A Expired GB263480A (en) 1925-12-22 1926-04-13 Loud speakers

Country Status (2)

Country Link
GB (1) GB263480A (en)
NL (1) NL21086C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2127650A (en) * 1982-08-07 1984-04-11 Univ Liverpool Moving coil loudspeaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2127650A (en) * 1982-08-07 1984-04-11 Univ Liverpool Moving coil loudspeaker

Also Published As

Publication number Publication date
NL21086C (en)

Similar Documents

Publication Publication Date Title
GB263480A (en) Loud speakers
GB876426A (en) Improvements in or relating to loudspeaker diaphragms
GB308801A (en) Improvements in sound reproducing apparatus, such as loud-speaking telephonic receivers
GB284343A (en) Improvements in or connected with souud reproducing devices
GB263479A (en) Loud speakers
GB268338A (en) Loud speaker
US1845210A (en) Loud speaker diaphragm
GB265538A (en) Improvements in loud speakers
US1773605A (en) Loud-speaker
GB255582A (en) Vibratory diaphragms for acoustical instruments
GB611179A (en) Improvements in and relating to acoustic instruments, such as loud speakers and directional microphones
JPS5268408A (en) Edge of diaphragm
US1727651A (en) Sound amplifier
GB248845A (en) Improvements in and relating to loud speakers for wireless telephony, and the like
GB276310A (en)
US1896073A (en) Acoustic diaphragm
GB271207A (en) Improvements in loud speakers, and like sound-reproducing devices
US1665284A (en) Acoustic diaphragm
JPS5388721A (en) Dynamic electroacoustic converter
US1355552A (en) Diaphragm and process of making same
GB315578A (en) Improvements in and relating to diaphragms for acoustic devices
GB302459A (en) Improvements in cone type loud speakers
GB263481A (en) Loud speakers
GB259535A (en) Sound reproducer and method of manufacturing the same
GB311044A (en) Improvements in diaphragms for gramophones, telephonic loud speakers and the like