FR510941A - Heating block for thermal phones - Google Patents

Heating block for thermal phones

Info

Publication number
FR510941A
FR510941A FR510941DA FR510941A FR 510941 A FR510941 A FR 510941A FR 510941D A FR510941D A FR 510941DA FR 510941 A FR510941 A FR 510941A
Authority
FR
France
Prior art keywords
phones
thermal
heating block
heating
block
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
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR510941A publication Critical patent/FR510941A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Resistance Heating (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
FR510941D 1914-03-25 1915-03-10 Heating block for thermal phones Expired FR510941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE283703T 1914-03-25

Publications (1)

Publication Number Publication Date
FR510941A true FR510941A (en) 1920-12-14

Family

ID=32605053

Family Applications (1)

Application Number Title Priority Date Filing Date
FR510941D Expired FR510941A (en) 1914-03-25 1915-03-10 Heating block for thermal phones

Country Status (4)

Country Link
DE (1) DE283703C (en)
FR (1) FR510941A (en)
GB (1) GB191504353A (en)
NL (1) NL1925C (en)

Also Published As

Publication number Publication date
GB191504353A (en) 1915-07-29
NL1925C (en) 1917-02-22
DE283703C (en) 1915-04-23

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