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
GB1838728A
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Individual
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Individual
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Priority to GB1838728ApriorityCriticalpatent/GB319080A/en
Publication of GB319080ApublicationCriticalpatent/GB319080A/en
G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
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Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Acoustics & Sound
(AREA)
Multimedia
(AREA)
Percussion Or Vibration Massage
(AREA)
Abstract
319,080. Durham, J. June 25, 1928. Sound-magnifying appliances. -A " sound impeding and resonating device " for fitting in the amplifier and sound passages of a sound reproducer consists of two concentric metal tubes 8, 9 perforated and mounted as shown. Several such dervices are used each having a different natural period of vibration.
GB1838728A1928-06-251928-06-25Improvements connected with amplifiers of sound reproducing instruments
ExpiredGB319080A
(en)
Support and centering member of the coil of an electrodynamic device, making it possible to transform electrical oscillations into acoustic oscillations or vice versa