GB259714A - Apparatus for retaining and improving the power of hearing - Google Patents

Apparatus for retaining and improving the power of hearing

Info

Publication number
GB259714A
GB259714A GB2066925A GB2066925A GB259714A GB 259714 A GB259714 A GB 259714A GB 2066925 A GB2066925 A GB 2066925A GB 2066925 A GB2066925 A GB 2066925A GB 259714 A GB259714 A GB 259714A
Authority
GB
United Kingdom
Prior art keywords
receiver
hearing
improving
power
retaining
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
GB2066925A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2066925A priority Critical patent/GB259714A/en
Publication of GB259714A publication Critical patent/GB259714A/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

259,714. Munro, H. Aug. 18, 1925. Hearing - appliances. - Means for controlling the intensity of sound in either of two telephone receivers for improving the power of hearing, comprises for each receiver 1, a variable resistance 11, a resistance 15 equal to that of the receiver, a member 17 for shortcircuiting the receiver, and switches for controlling the insertion in circuit of the receiver and resistances. The receivers may be connected in parallel, and each resistance 11 may be in series or parallel with its receiver. According to the Provisional Specification a graduated scale may be provided on a panel for the regulating apparatus.
GB2066925A 1925-08-18 1925-08-18 Apparatus for retaining and improving the power of hearing Expired GB259714A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2066925A GB259714A (en) 1925-08-18 1925-08-18 Apparatus for retaining and improving the power of hearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2066925A GB259714A (en) 1925-08-18 1925-08-18 Apparatus for retaining and improving the power of hearing

Publications (1)

Publication Number Publication Date
GB259714A true GB259714A (en) 1926-10-21

Family

ID=10149696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2066925A Expired GB259714A (en) 1925-08-18 1925-08-18 Apparatus for retaining and improving the power of hearing

Country Status (1)

Country Link
GB (1) GB259714A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6325867B1 (en) 1993-05-31 2001-12-04 Nsk Ltd. Rolling bearing and heat treatment method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6325867B1 (en) 1993-05-31 2001-12-04 Nsk Ltd. Rolling bearing and heat treatment method therefor

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