GB504232A - Improvements in or relating to rubber gas masks - Google Patents

Improvements in or relating to rubber gas masks

Info

Publication number
GB504232A
GB504232A GB16356/38A GB1635638A GB504232A GB 504232 A GB504232 A GB 504232A GB 16356/38 A GB16356/38 A GB 16356/38A GB 1635638 A GB1635638 A GB 1635638A GB 504232 A GB504232 A GB 504232A
Authority
GB
United Kingdom
Prior art keywords
apertures
pocket
relating
mask
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
GB16356/38A
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.)
International Latex Processes Ltd
Original Assignee
International Latex Processes 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 International Latex Processes Ltd filed Critical International Latex Processes Ltd
Publication of GB504232A publication Critical patent/GB504232A/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
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/10—Valves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/22—Switches without multi-position wipers
    • H01H67/26—Co-ordinate-type selector switches not having relays at cross-points but involving mechanical movement, e.g. cross-bar switch, code-bar switch

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)
  • Check Valves (AREA)

Abstract

504,232. Non-return valves. INTERNATIONAL LATEX PROCESSES, Ltd. June 1, 1938, No. 16356. Convention date, July 17, 1937. [Class 135] [Also in Group VI] The wall of a gas-mask 1, Fig. 3, is formed with a pocket 11 having a single aperture 10 on the side; and apertures 7 out of line therewith on the other. The pocket contains a metal or other disc 10 with a perforation registering with aperture 9, the construction thereby acting as a non-return valve opening towards the upper side. In another construction a cylindrical pocket 5, Fig. 2, formed on the wall 1 of a mask and communicating therewith by a restricted opening 6, has a diametrical slit at 7 and contains a disc 8 formed with apertures 9, e.g. a pair of segmental apertures, out of register with the slit.
GB16356/38A 1937-07-17 1938-06-01 Improvements in or relating to rubber gas masks Expired GB504232A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT504232X 1937-07-17

Publications (1)

Publication Number Publication Date
GB504232A true GB504232A (en) 1939-04-21

Family

ID=11272937

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16356/38A Expired GB504232A (en) 1937-07-17 1938-06-01 Improvements in or relating to rubber gas masks

Country Status (1)

Country Link
GB (1) GB504232A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003045503A1 (en) * 2001-11-21 2003-06-05 3M Innovative Properties Company Filtering face mask that uses an exhalation valve that has a multilayered flexible flap
WO2005061054A1 (en) * 2003-11-28 2005-07-07 Drägerwerk AG Respiratory mask
CN103403414A (en) * 2010-12-29 2013-11-20 3M创新有限公司 Valve having an ablated flap
US11877604B2 (en) 2007-05-03 2024-01-23 3M Innovative Properties Company Maintenance-free respirator that has concave portions on opposing sides of mask top section
US11904191B2 (en) 2007-05-03 2024-02-20 3M Innovative Properties Company Anti-fog respirator
US12005277B2 (en) 2013-07-15 2024-06-11 3M Innovative Properties Company Respirator having optically active exhalation valve

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003045503A1 (en) * 2001-11-21 2003-06-05 3M Innovative Properties Company Filtering face mask that uses an exhalation valve that has a multilayered flexible flap
US7013895B2 (en) 2001-11-21 2006-03-21 3M Innovative Properties Company Exhalation and inhalation valves that have a multi-layered flexible flap
AU2002340081B2 (en) * 2001-11-21 2008-04-10 3M Innovative Properties Company Filtering face mask that uses an exhalation valve that has a multilayered flexible flap
CN100522288C (en) * 2001-11-21 2009-08-05 3M创新有限公司 Filtering face mask that uses an exhalation valve that has a multilayered flexible flap
WO2005061054A1 (en) * 2003-11-28 2005-07-07 Drägerwerk AG Respiratory mask
US11877604B2 (en) 2007-05-03 2024-01-23 3M Innovative Properties Company Maintenance-free respirator that has concave portions on opposing sides of mask top section
US11904191B2 (en) 2007-05-03 2024-02-20 3M Innovative Properties Company Anti-fog respirator
CN103403414A (en) * 2010-12-29 2013-11-20 3M创新有限公司 Valve having an ablated flap
US12005277B2 (en) 2013-07-15 2024-06-11 3M Innovative Properties Company Respirator having optically active exhalation valve

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