GB806844A - Improvements in or relating to ear defenders - Google Patents

Improvements in or relating to ear defenders

Info

Publication number
GB806844A
GB806844A GB2116856A GB2116856A GB806844A GB 806844 A GB806844 A GB 806844A GB 2116856 A GB2116856 A GB 2116856A GB 2116856 A GB2116856 A GB 2116856A GB 806844 A GB806844 A GB 806844A
Authority
GB
United Kingdom
Prior art keywords
ear
july
relating
rotatable
disc
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
GB2116856A
Inventor
John Stuart Pepys Rawlins
William O'connor
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB2116856A priority Critical patent/GB806844A/en
Publication of GB806844A publication Critical patent/GB806844A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/16—Ear protection devices
    • A42B3/166—Integral hearing protection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Otolaryngology (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Psychology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

806,844. Ear protectors. NATIONAL RESEARCH DEVELOPMENT CORPORATION. July 2, 1957 [July 9, 1956], No. 21168/56. Class 81 (2). An ear protector comprises a manuallyoperable obturator for closing a sound passage into the ear. A base-plate 11, with a sealing cushion 10 around its periphery, has holes adjacent the ear orifice which may be closed by a rotatable apertured disc 16. The disc is rotatable by a collar 18 and pressure is maintained by a coil spring, as shown, or by a dished, starspring. A detachable cover 13 may be provided.
GB2116856A 1956-07-09 1956-07-09 Improvements in or relating to ear defenders Expired GB806844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2116856A GB806844A (en) 1956-07-09 1956-07-09 Improvements in or relating to ear defenders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2116856A GB806844A (en) 1956-07-09 1956-07-09 Improvements in or relating to ear defenders

Publications (1)

Publication Number Publication Date
GB806844A true GB806844A (en) 1958-12-31

Family

ID=10158306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2116856A Expired GB806844A (en) 1956-07-09 1956-07-09 Improvements in or relating to ear defenders

Country Status (1)

Country Link
GB (1) GB806844A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002080830A1 (en) * 2001-04-09 2002-10-17 Cabot Safety Intermediate Corporation Earmuff with controlled leak

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002080830A1 (en) * 2001-04-09 2002-10-17 Cabot Safety Intermediate Corporation Earmuff with controlled leak
US6826287B2 (en) 2001-04-09 2004-11-30 Cabot Safety Intermediate Corporation Earmuff with controlled leak

Similar Documents

Publication Publication Date Title
GB806844A (en) Improvements in or relating to ear defenders
ES226654U (en) High-reliability valve
GB578613A (en) Device for protecting the ear drum
CA528540A (en) Diaphragm valve
CA528424A (en) Fluid-controlling valves
CA531243A (en) Valve assembly
CA533935A (en) Resilient seal valve
AU209393B2 (en) An improved needle valve
CA533436A (en) Valve stem seal
CA526359A (en) Combined sealing medium and cuff for an artificial respirator housing opening
GB782376A (en) Improvements in or relating to loud-speakers
CA528751A (en) Valve and fluid control conduit
CA524803A (en) Self throttling valves
AU1724156A (en) An improved needle valve
CA526567A (en) Pressure control valve
CA522406A (en) Pressure control valve
AU1959156A (en) Pressure regulating valve
AU209320B2 (en) Improved butterfly valve
GB777357A (en) Improvements in safety helmets
CA522409A (en) Flow control valve
CA531723A (en) Flow control valve
GB460759A (en) Improvements in and relating to caps, head suspension devices or the like having telephone ear pieces or the like mounted therein
CA528309A (en) Poppet valve mounting assembly
CA534596A (en) Crankcase ventilation valve incorporating flame arrester
ES48533U (en) Closing device perfected (Machine-translation by Google Translate, not legally binding)