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
GB1413421A
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.)
FREDERICK WILLIAM HODGKINSON
J W Hodgkinson & Son
Original Assignee
FREDERICK WILLIAM HODGKINSON
J W Hodgkinson & Son
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 FREDERICK WILLIAM HODGKINSON, J W Hodgkinson & SonfiledCriticalFREDERICK WILLIAM HODGKINSON
Priority to GB1413421ApriorityCriticalpatent/GB183958A/en
Publication of GB183958ApublicationCriticalpatent/GB183958A/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)
Laminated Bodies
(AREA)
Abstract
183,958. Hodgrkinson & Son, J. W., and Hodgkinson, F. W. May 20, 1921. Sound magnifying and directing appliances.- The horns of gramophones and like instruments are constructed of, or covered with, lead or other non-resonant metallic substance of a soft nature and low elasticity.
GB1413421A1921-05-201921-05-20Improvements in and relating to gramophones and the like instruments
ExpiredGB183958A
(en)