GB464504A - Improvements in respiratory appliances for personal use - Google Patents

Improvements in respiratory appliances for personal use

Info

Publication number
GB464504A
GB464504A GB2036035A GB2036035A GB464504A GB 464504 A GB464504 A GB 464504A GB 2036035 A GB2036035 A GB 2036035A GB 2036035 A GB2036035 A GB 2036035A GB 464504 A GB464504 A GB 464504A
Authority
GB
United Kingdom
Prior art keywords
valve
canister
mask
bolt
secured
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
GB2036035A
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.)
PHILLIP WEIN
SIMON NYMAN
Original Assignee
PHILLIP WEIN
SIMON NYMAN
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 PHILLIP WEIN, SIMON NYMAN filed Critical PHILLIP WEIN
Priority to GB2036035A priority Critical patent/GB464504A/en
Publication of GB464504A publication Critical patent/GB464504A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

464,504. Respiratory appliances. NYMAN, S., and WEIN, P. July 17, 1935, No: 20360. [Class 81 (ii)] A protective respiratory appliance comprises a windowed flexible mask 1 having opposite the mouth an exhalation valve 16, and an inhalation opening connected by a tube 7 with a filter canister 5 secured to the mask immediately in front of the exhalation valve casing. The valve 16 comprises a centrally apertured disc, preferably corrugated, and clamped around its periphery between two apertured dished plates 13, 14, by a central bolt 21. A plate 17, also held by the bolt, forms a seating for the valve. The tube 7 is clamped to the mask by screw rings 8, 9, and may be flexible or, as shown, rigid and formed integral with the canister 5. The canister has a perforated cover 10 supporting a disc-form inhaling valve 11, and is secured to the exhaling valve casing by a band 19 contractible by a screw 20 and attached to the bolt 21. Gauze 12 within the canister may support a layer of flannel, cotton wool or like fibrous material l surmounted by a chemical purifying material l<1>, and a second filtering layer l<2> comprising cotton wool and metal gauze or fabric netting.
GB2036035A 1935-07-17 1935-07-17 Improvements in respiratory appliances for personal use Expired GB464504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2036035A GB464504A (en) 1935-07-17 1935-07-17 Improvements in respiratory appliances for personal use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2036035A GB464504A (en) 1935-07-17 1935-07-17 Improvements in respiratory appliances for personal use

Publications (1)

Publication Number Publication Date
GB464504A true GB464504A (en) 1937-04-19

Family

ID=10144643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2036035A Expired GB464504A (en) 1935-07-17 1935-07-17 Improvements in respiratory appliances for personal use

Country Status (1)

Country Link
GB (1) GB464504A (en)

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