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
GB1490521A
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
Priority to GB1490521ApriorityCriticalpatent/GB185479A/en
Publication of GB185479ApublicationCriticalpatent/GB185479A/en
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
Landscapes
Toys
(AREA)
Chair Legs, Seat Parts, And Backrests
(AREA)
Abstract
185,479. Miles, H. B. May 28, 1921. Sound magnifying and directing appliances.- A sound-amplifier 11 in a gramophone is fitted with internal partitions 12 that extend rearwardly to a sound-modulating valve. This consists of a pivoted member 13 that can be moved so as to close successively the passages formed by the partitions 12.
GB1490521A1921-05-281921-05-28Improvements relating to sound reproducing machines
ExpiredGB185479A
(en)