DE138793C - - Google Patents
Info
- Publication number
- DE138793C DE138793C DENDAT138793D DE138793DA DE138793C DE 138793 C DE138793 C DE 138793C DE NDAT138793 D DENDAT138793 D DE NDAT138793D DE 138793D A DE138793D A DE 138793DA DE 138793 C DE138793 C DE 138793C
- Authority
- DE
- Germany
- Prior art keywords
- microphone
- capacitor
- polarization
- cells
- switched
- 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.)
- Active
Links
- 230000010287 polarization Effects 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE138793T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE138793C true DE138793C (https=) |
Family
ID=5667470
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT126002D Active DE126002C (https=) | |||
| DENDAT138793D Active DE138793C (https=) | |||
| DENDAT137936D Active DE137936C (https=) | |||
| DE1905168606D Expired - Lifetime DE168606C (https=) | 1901-01-07 | 1905-01-31 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT126002D Active DE126002C (https=) |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT137936D Active DE137936C (https=) | |||
| DE1905168606D Expired - Lifetime DE168606C (https=) | 1901-01-07 | 1905-01-31 |
Country Status (1)
| Country | Link |
|---|---|
| DE (4) | DE168606C (https=) |
-
0
- DE DENDAT126002D patent/DE126002C/de active Active
- DE DENDAT138793D patent/DE138793C/de active Active
- DE DENDAT137936D patent/DE137936C/de active Active
-
1905
- 1905-01-31 DE DE1905168606D patent/DE168606C/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE137936C (https=) | |
| DE168606C (https=) | |
| DE126002C (https=) |
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