GB830249A - Improvements in or relating to electrical equipments - Google Patents

Improvements in or relating to electrical equipments

Info

Publication number
GB830249A
GB830249A GB1563157A GB1563157A GB830249A GB 830249 A GB830249 A GB 830249A GB 1563157 A GB1563157 A GB 1563157A GB 1563157 A GB1563157 A GB 1563157A GB 830249 A GB830249 A GB 830249A
Authority
GB
United Kingdom
Prior art keywords
relating
box
electrical equipments
detachable
gramophone
Prior art date
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
GB1563157A
Inventor
Sydney Welldon
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1563157A priority Critical patent/GB830249A/en
Publication of GB830249A publication Critical patent/GB830249A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Structure Of Receivers (AREA)
  • Telephone Set Structure (AREA)

Abstract

830,249. Loud-speakers. GENERAL ELECTRIC CO. Ltd. May 14, 1958 [May 16, 1957], No. 15631/57. Class 13. [Also in Groups XXXIX and XL (c)] A portable radio or gramophone has detachable internal partitions 13 forming a Helmholtz resonator and supporting a transistor amplifier and other electrical equipment. An elliptical speaker 10 is flanked by apertures 11. The bottom of the box is detachable to assist servicing and the box is covered with fabric to damp resonances.
GB1563157A 1957-05-16 1957-05-16 Improvements in or relating to electrical equipments Expired GB830249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1563157A GB830249A (en) 1957-05-16 1957-05-16 Improvements in or relating to electrical equipments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1563157A GB830249A (en) 1957-05-16 1957-05-16 Improvements in or relating to electrical equipments

Publications (1)

Publication Number Publication Date
GB830249A true GB830249A (en) 1960-03-16

Family

ID=10062627

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1563157A Expired GB830249A (en) 1957-05-16 1957-05-16 Improvements in or relating to electrical equipments

Country Status (1)

Country Link
GB (1) GB830249A (en)

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