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
GB31385/27A
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 GB292571ApublicationCriticalpatent/GB292571A/en
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
H04R7/00—Diaphragms for electromechanical transducers; Cones
Abstract
292,571. Brinkmann, F. June 24, 1927, [Convention date]. Loud - speakers. - The two perforated bellied dishes 1, 2 constituting the housing of a hornless loudspeaker are held together by a strip 3 of more or less channel formation. The strip 3 is secured to a pedestal 4, which is arranged to cover the ends of the strip by means of a plate 9, bolt 10 and nut 12, Fig. 3. The dishes are preferably covered with cloth, the material of the dish 1 being flanged over the cloth at the opening 7 for the adjusting device 8.
GB31385/27A1927-06-241927-11-22Improvements in or relating to hornless loud speakers
ExpiredGB292571A
(en)
Improvements in amplifiers and acoustic radiation devices designed for use with telephone receivers, loudspeakers and other sound producing or reproducing devices