GB1184828A - Improvements in or relating to Sound Attenuating Units - Google Patents

Improvements in or relating to Sound Attenuating Units

Info

Publication number
GB1184828A
GB1184828A GB5247767A GB5247767A GB1184828A GB 1184828 A GB1184828 A GB 1184828A GB 5247767 A GB5247767 A GB 5247767A GB 5247767 A GB5247767 A GB 5247767A GB 1184828 A GB1184828 A GB 1184828A
Authority
GB
United Kingdom
Prior art keywords
duct
edges
partitions
absorbing material
sound absorbing
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
GB5247767A
Inventor
John Harvey Ferguson
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.)
Woods of Colchester Ltd
Original Assignee
Woods of Colchester Ltd
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 Woods of Colchester Ltd filed Critical Woods of Colchester Ltd
Priority to GB5247767A priority Critical patent/GB1184828A/en
Priority to FR1591982D priority patent/FR1591982A/fr
Priority to DE19681809426 priority patent/DE1809426C3/en
Publication of GB1184828A publication Critical patent/GB1184828A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Duct Arrangements (AREA)
  • Exhaust Silencers (AREA)

Abstract

1,184,828. Silencing gaseous flow. WOODS OF COLCHESTER Ltd. Nov.15, 1968 [Nov.17, 1967], No.52477/67. Heading F1B. A sound attenuating unit comprises a length of duct having adjoining inlet and outlet portions inclined at an appreciable angle to each other to form a bend and each incorporating sound absorbing material in the form of substantially parallelsided splitters disposed parallel to each other and to the plane of the bend to provide a plurality of air paths each bounded by surfaces of the material. The air duct 1 shown in Fig. 1 comprises inlet and outlet portions 2, 3 at right angles to one another (or at some other angle preferably greater than 45 degrees), the air flow being divided by parallel partitions 4, 5 of sound absorbing material such as glass fibre mat faced with perforated metal sheet. Nose fairings 9 of triangular or bull-nosed cross-section are provided at the inlet. The inner edges of the partitions 4, 5 are chamfered as shown, the two sets of partitions' being separated by turning vanes 8. As shown in Fig. 3, the outer edges 10, 11 may also be chamfered similarly to the inner edges so as to provide a constant mean path from the edges 10 to the edges 11. In this case, the duct portions 2, 3 are made longer than in the Fig.1 construction, as indicated by lines 12, to provide the same degree of sound attenuation as before, but there is a saving in the amount of sound absorbing material needed. The duct may be of circular cross-section.
GB5247767A 1967-11-17 1967-11-17 Improvements in or relating to Sound Attenuating Units Expired GB1184828A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5247767A GB1184828A (en) 1967-11-17 1967-11-17 Improvements in or relating to Sound Attenuating Units
FR1591982D FR1591982A (en) 1967-11-17 1968-11-15
DE19681809426 DE1809426C3 (en) 1967-11-17 1968-11-16 silencer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5247767A GB1184828A (en) 1967-11-17 1967-11-17 Improvements in or relating to Sound Attenuating Units

Publications (1)

Publication Number Publication Date
GB1184828A true GB1184828A (en) 1970-03-18

Family

ID=10464068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5247767A Expired GB1184828A (en) 1967-11-17 1967-11-17 Improvements in or relating to Sound Attenuating Units

Country Status (3)

Country Link
DE (1) DE1809426C3 (en)
FR (1) FR1591982A (en)
GB (1) GB1184828A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136502A (en) * 1983-03-17 1984-09-19 Chillcotts Ltd Internal combustion engine exhaust silencer

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1329862A (en) * 1970-09-22 1973-09-12 Sound Attenuators Ltd Acoustic attenuator
DE4204189A1 (en) * 1992-02-13 1993-08-19 Schako Metallwarenfabrik Reversing sound damper in air duct
DE9216991U1 (en) * 1992-02-13 1993-04-08 "Schako" Metallwarenfabrik Ferdinand Schad KG Zweigniederlassung Kolbingen, 7201 Kolbingen Deflection silencer
FR2881512B1 (en) * 2005-02-03 2007-03-30 Aldes Aeraulique Sa HOUSING CONNECTION BETWEEN HORIZONTAL AND VERTICAL DUCTS OF A CONTROLLED MECHANICAL VENTILATION SYSTEM OF A BUILDING

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136502A (en) * 1983-03-17 1984-09-19 Chillcotts Ltd Internal combustion engine exhaust silencer

Also Published As

Publication number Publication date
FR1591982A (en) 1970-05-04
DE1809426A1 (en) 1969-07-17
DE1809426C3 (en) 1979-08-23
DE1809426B2 (en) 1978-12-21

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee