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
GB1316527A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIDNEY TREDWAY BUER
STC PLC
Original Assignee
SIDNEY TREDWAY BUER
Standard Telephone and Cables PLC
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.)
Filing date
Publication date
Application filed by SIDNEY TREDWAY BUER, Standard Telephone and Cables PLCfiledCriticalSIDNEY TREDWAY BUER
Priority to GB1316527ApriorityCriticalpatent/GB295668A/en
Publication of GB295668ApublicationCriticalpatent/GB295668A/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
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Abstract
295,668. Standard Telephones & Cables, Ltd., and Buer, S. T., May 17, 1927. Receivers.-In a telephone receiver the polepieces are composed of an alloy of nickel and iron, or of nickel, iron and chromium and are welded to the permanent magnet. Specifications 2507/13, and 188,688, [Class 72, Iron &c.], are referred to.