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
GB2224019A
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.)
THOMAS HUDGELL
Original Assignee
THOMAS HUDGELL
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 THOMAS HUDGELLfiledCriticalTHOMAS HUDGELL
Priority to GB2224019ApriorityCriticalpatent/GB154007A/en
Publication of GB154007ApublicationCriticalpatent/GB154007A/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
Landscapes
Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Acoustics & Sound
(AREA)
Multimedia
(AREA)
Abstract
154,007. Hudgell, T. Sept. 10, 1919. Drawings to Specification. No Patent granted (Sealing fee not paid). Sound magnifying and directing appliances.-A gramophone trumpet consists of a hollow wooden cone inserted in a hole in the curved surface of a wooden cylinder which contains the soundbox.
GB2224019A1919-09-101919-09-10An improved means of sound reproduction for gramoph ones
ExpiredGB154007A
(en)