GB259298A - Improvements in loud speakers - Google Patents

Improvements in loud speakers

Info

Publication number
GB259298A
GB259298A GB1741425A GB1741425A GB259298A GB 259298 A GB259298 A GB 259298A GB 1741425 A GB1741425 A GB 1741425A GB 1741425 A GB1741425 A GB 1741425A GB 259298 A GB259298 A GB 259298A
Authority
GB
United Kingdom
Prior art keywords
block
diaphragm
casing
magnet
massive
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
GB1741425A
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 MACKENZIE RAPHAEL BALB
Original Assignee
CHARLES MACKENZIE RAPHAEL BALB
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 MACKENZIE RAPHAEL BALB filed Critical CHARLES MACKENZIE RAPHAEL BALB
Priority to GB1741425A priority Critical patent/GB259298A/en
Publication of GB259298A publication Critical patent/GB259298A/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

259,298. Balbi, C. M. R. July 7, 1925. Loud-speakers ; magnetic instruments. - The diaphragm of a telephone receiver, such as a loudspeaker, is mounted on a massive block which is adjustable, slidably and without turning, towards or away from the magnet poles. Fig. 2 shows a loud-speaker in which the diaphragm f is secured by means of an adhesive to a massive block g of brass &c. The block is adjustable within a thick-walled casing by means of a screw h. A screw k prevents rotary movement of the block by engaging in any one of a number of holes drilled in the block. The magnet a, polepieces b and terminals c are mounted on a disc of insulating material which is screwed to the casing e. In a modification. Fig. 3, the horn m is arranged differently, being fixed to the block g instead of to the casing, so that it has a slight vertical movement when the diaphragm is being adjusted. Fig. 4 shows an alternative form of mounting the magnet, polepieces and terminals, these parts being embedded in a moulded insulating base x. Space is left around the poles to allow the windings to be slipped on. The thickness of the casing, diaphragm mounting member, and base, proportionately to that of the diaphragm, is specified, a massive and rigid construction of the casing &c. being adopted to minimize energy losses.
GB1741425A 1925-07-07 1925-07-07 Improvements in loud speakers Expired GB259298A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1741425A GB259298A (en) 1925-07-07 1925-07-07 Improvements in loud speakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1741425A GB259298A (en) 1925-07-07 1925-07-07 Improvements in loud speakers

Publications (1)

Publication Number Publication Date
GB259298A true GB259298A (en) 1926-10-07

Family

ID=10094764

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1741425A Expired GB259298A (en) 1925-07-07 1925-07-07 Improvements in loud speakers

Country Status (1)

Country Link
GB (1) GB259298A (en)

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