GB313778A - Improvements in or relating to sound reproducing apparatus - Google Patents

Improvements in or relating to sound reproducing apparatus

Info

Publication number
GB313778A
GB313778A GB1994728A GB1994728A GB313778A GB 313778 A GB313778 A GB 313778A GB 1994728 A GB1994728 A GB 1994728A GB 1994728 A GB1994728 A GB 1994728A GB 313778 A GB313778 A GB 313778A
Authority
GB
United Kingdom
Prior art keywords
bar
pivots
line
stylus
diaphragm
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
GB1994728A
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.)
WOLTER HENDRIK HOFSTEDE CRULL
Original Assignee
WOLTER HENDRIK HOFSTEDE CRULL
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 WOLTER HENDRIK HOFSTEDE CRULL filed Critical WOLTER HENDRIK HOFSTEDE CRULL
Priority to GB1994728A priority Critical patent/GB313778A/en
Publication of GB313778A publication Critical patent/GB313778A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Recording Measured Values (AREA)

Abstract

313,778. Crull, W. H. H. July 9, 1928. Tool-arm mountings.-The stylus-bar is held against knife-edge pivots by a spring acting at a line or point in the line passing through the pivots or in a line parallel thereto but more distant from the diaphragm, the mounting being thus in balanced or unstable equilibrium respectively with the diaphragm at rest and opposing no resistance to its movement by the record. Figs. 1 and 3 show the stylus-bar 2 held against knifeedge pivots 3 by a tension spring 12 extending between a cross-bar 11 bearing on internal lugs on the sound-box casing 6 and a cross-bar 10 bearing on the stylus-bar either in the line of the pivots 3 or more distant from the diaphragm 8.
GB1994728A 1928-07-09 1928-07-09 Improvements in or relating to sound reproducing apparatus Expired GB313778A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1994728A GB313778A (en) 1928-07-09 1928-07-09 Improvements in or relating to sound reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1994728A GB313778A (en) 1928-07-09 1928-07-09 Improvements in or relating to sound reproducing apparatus

Publications (1)

Publication Number Publication Date
GB313778A true GB313778A (en) 1929-06-20

Family

ID=10137776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1994728A Expired GB313778A (en) 1928-07-09 1928-07-09 Improvements in or relating to sound reproducing apparatus

Country Status (1)

Country Link
GB (1) GB313778A (en)

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