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.)
Expired
Application number
GB2210622A
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Individual
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Individual
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Publication date
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Priority to GB2210622ApriorityCriticalpatent/GB206910A/en
Publication of GB206910ApublicationCriticalpatent/GB206910A/en
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
Abstract
206,910. McLachlan, N. W. Aug. 14, 1922. Telephones.-In a telephone instrument of the type wherein a soft iron reed F connected to a diaphragm A is mounted between magnet poles H which contain a coil M, the reed is mounted on a torsion wire or spindle G.
GB2210622A1922-08-141922-08-14Improvements in telephones
ExpiredGB206910A
(en)