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
GB9664/36A
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.)
Individual
Original Assignee
Individual
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 IndividualfiledCriticalIndividual
Publication of GB477967ApublicationCriticalpatent/GB477967A/en
H04M9/00—Arrangements for interconnection not involving centralised switching
H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Amplifiers
(AREA)
Abstract
477,967. Circuits for loud-speakers. EPPLER, J. April 1, 1936, No. 9664. Void. Convention date, April 1, 1935. Drawings to Specification. [Class 40 (iv)] In a radio-receiver or gramophone-reproducing circuit comprising an audio-frequency amplifier and two or more loud-speakers, the latter are associated with a commutating device whereby any one may be connected to the input circuit of the amplifier for use as a transmitter.
GB9664/36A1936-03-231936-04-01Improvements in telephonic arrangements applicable to acoustic frequency amplifiers
ExpiredGB477967A
(en)