GB217289A - Improvements relating to wooden tubular structures - Google Patents

Improvements relating to wooden tubular structures

Info

Publication number
GB217289A
GB217289A GB663323A GB663323A GB217289A GB 217289 A GB217289 A GB 217289A GB 663323 A GB663323 A GB 663323A GB 663323 A GB663323 A GB 663323A GB 217289 A GB217289 A GB 217289A
Authority
GB
United Kingdom
Prior art keywords
bends
edges
improvements relating
tubular structures
shaped
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
GB663323A
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 Individual filed Critical Individual
Priority to GB663323A priority Critical patent/GB217289A/en
Publication of GB217289A publication Critical patent/GB217289A/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 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

217,289. Green, J. March 7, 1923. Wood tubes.-Wooden tubes of the type formed from continuous strips ot veneer or thin wood wound spirally with abutting or overlapping edges are shaped with bends in the walls in the direction of the axis of the tube so as to be suitable for tone arms and " loud speaker " horns. For simple bends of unvarying diameter, the strip a may be shaped as shown in Fig. 2, and the edges abutting, but for the bends of varying diameter or flared portions, the edges of the strip overlap, and are cemented together.
GB663323A 1923-03-07 1923-03-07 Improvements relating to wooden tubular structures Expired GB217289A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB663323A GB217289A (en) 1923-03-07 1923-03-07 Improvements relating to wooden tubular structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB663323A GB217289A (en) 1923-03-07 1923-03-07 Improvements relating to wooden tubular structures

Publications (1)

Publication Number Publication Date
GB217289A true GB217289A (en) 1924-06-10

Family

ID=9818000

Family Applications (1)

Application Number Title Priority Date Filing Date
GB663323A Expired GB217289A (en) 1923-03-07 1923-03-07 Improvements relating to wooden tubular structures

Country Status (1)

Country Link
GB (1) GB217289A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000042355A1 (en) * 1999-01-14 2000-07-20 Olga Panteleimonovna Skrotskaya Furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000042355A1 (en) * 1999-01-14 2000-07-20 Olga Panteleimonovna Skrotskaya Furnace

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