BE562223A - - Google Patents
Info
- Publication number
- BE562223A BE562223A BE562223DA BE562223A BE 562223 A BE562223 A BE 562223A BE 562223D A BE562223D A BE 562223DA BE 562223 A BE562223 A BE 562223A
- Authority
- BE
- Belgium
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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB34296/56A GB803284A (en) | 1956-11-09 | 1956-11-09 | Improvements in or relating to telephone transmitters |
Publications (1)
Publication Number | Publication Date |
---|---|
BE562223A true BE562223A (en) |
Family
ID=10363849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE562223D BE562223A (en) | 1956-11-09 |
Country Status (5)
Country | Link |
---|---|
US (1) | US2960579A (en) |
BE (1) | BE562223A (en) |
FR (1) | FR1185908A (en) |
GB (1) | GB803284A (en) |
NL (1) | NL222241A (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US841035A (en) * | 1905-07-28 | 1907-01-08 | Edward Glaze | Electrical switch. |
US2481368A (en) * | 1947-10-04 | 1949-09-06 | Gen Electric | Starting switch for fluorescent lamps |
GB778726A (en) * | 1954-07-05 | 1957-07-10 | Hoover Ltd | Improvements relating to electric switches having two "on" and one "off" positions |
US2960580A (en) * | 1959-04-10 | 1960-11-15 | Ark Les Switch Corp | Rotary switch |
-
0
- NL NL222241D patent/NL222241A/xx unknown
- BE BE562223D patent/BE562223A/xx unknown
-
1956
- 1956-11-09 GB GB34296/56A patent/GB803284A/en not_active Expired
-
1957
- 1957-10-28 US US692806A patent/US2960579A/en not_active Expired - Lifetime
- 1957-11-08 FR FR1185908D patent/FR1185908A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2960579A (en) | 1960-11-15 |
FR1185908A (en) | 1959-08-10 |
NL222241A (en) | |
GB803284A (en) | 1958-10-22 |