DE213607A - - Google Patents

Info

Publication number

DE213607A

DE213607A DE213607A DE 213607 A DE213607 A DE 213607A DE 213607 A DE213607 A DE 213607A

Authority

DE

Germany

Prior art keywords

coil

microphone

current

amplified

telegraphy

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.)

Pending

Links

• Espacenet
• Global Dossier
• DPMA
• Discuss

• 239000012528 membrane Substances 0.000 claims description 3
• OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
• 229910052799 carbon Inorganic materials 0.000 claims description 2
• 238000010521 absorption reaction Methods 0.000 claims 1
• 239000003245 coal Substances 0.000 claims 1
• 230000000694 effects Effects 0.000 description 3
• 230000005284 excitation Effects 0.000 description 2
• XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
• 239000000696 magnetic material Substances 0.000 description 1
• 238000004519 manufacturing process Methods 0.000 description 1
• 230000002787 reinforcement Effects 0.000 description 1
• 238000004804 winding Methods 0.000 description 1