NL29996C - - Google Patents
Info
- Publication number
- NL29996C NL29996C NL51959A NL51959A NL29996C NL 29996 C NL29996 C NL 29996C NL 51959 A NL51959 A NL 51959A NL 51959 A NL51959 A NL 51959A NL 29996 C NL29996 C NL 29996C
- 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
- H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US370448A US1757547A (en) | 1929-06-12 | 1929-06-12 | Phonograph pick-up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL29996C true NL29996C (xx) | 1933-06-15 |
Family
ID=23459707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL51959A NL29996C (xx) | 1929-06-12 | 1930-06-03 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1757547A (xx) |
| DE (1) | DE554450C (xx) |
| FR (1) | FR696839A (xx) |
| GB (1) | GB342635A (xx) |
| NL (1) | NL29996C (xx) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE479998A (xx) * | 1944-11-28 | |||
| US2511664A (en) * | 1944-11-28 | 1950-06-13 | Gen Electric | Phonograph pickup |
| US2472770A (en) * | 1945-11-20 | 1949-06-07 | Sylvania Electric Prod | Resistance apparatus for converting mechanical movement into electrical pulses |
| US2482467A (en) * | 1946-05-10 | 1949-09-20 | Westinghouse Electric Corp | Phonograph pickup |
| US2590439A (en) * | 1948-05-12 | 1952-03-25 | Star Electronics Inc | Push-pull resistance type phonograph pickup |
| US2680786A (en) * | 1950-05-24 | 1954-06-08 | Irving Seidman | Electric phonograph |
| US2700089A (en) * | 1950-11-28 | 1955-01-18 | Pfanstiehl Chemical Corp | Strain-sensitive transducer |
-
1929
- 1929-06-12 US US370448A patent/US1757547A/en not_active Expired - Lifetime
-
1930
- 1930-06-03 NL NL51959A patent/NL29996C/xx active
- 1930-06-06 GB GB17638/30A patent/GB342635A/en not_active Expired
- 1930-06-07 FR FR696839D patent/FR696839A/fr not_active Expired
- 1930-06-13 DE DE1930554450D patent/DE554450C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE554450C (de) | 1932-07-08 |
| US1757547A (en) | 1930-05-06 |
| GB342635A (en) | 1931-02-05 |
| FR696839A (fr) | 1931-01-07 |