NL222241A - - Google Patents
Info
- Publication number
- NL222241A NL222241A NL222241DA NL222241A NL 222241 A NL222241 A NL 222241A NL 222241D A NL222241D A NL 222241DA NL 222241 A NL222241 A NL 222241A
- Authority
- NL
- Netherlands
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 |
|---|---|
| NL222241A true NL222241A (fr) |
Family
ID=10363849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL222241D NL222241A (fr) | 1956-11-09 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2960579A (fr) |
| BE (1) | BE562223A (fr) |
| FR (1) | FR1185908A (fr) |
| GB (1) | GB803284A (fr) |
| NL (1) | NL222241A (fr) |
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
- BE BE562223D patent/BE562223A/xx unknown
- NL NL222241D patent/NL222241A/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/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE562223A (fr) | |
| US2960579A (en) | 1960-11-15 |
| FR1185908A (fr) | 1959-08-10 |
| GB803284A (en) | 1958-10-22 |