Priority date (The priority date 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 date listed.)
Publication of BE625621ApublicationCriticalpatent/BE625621A/xx
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
H04R11/00—Transducers of moving-armature or moving-core type
H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
H04R11/12—Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
Landscapes
Physics & Mathematics
(AREA)
Electromagnetism
(AREA)
Engineering & Computer Science
(AREA)
Acoustics & Sound
(AREA)
Signal Processing
(AREA)
Knitting Machines
(AREA)
Magnetic Treatment Devices
(AREA)
Toys
(AREA)
Cookers
(AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups
(AREA)
Reciprocating, Oscillating Or Vibrating Motors
(AREA)
Magnetic Heads
(AREA)
Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers
(AREA)