GB839937A - Oxygen mask assembly and adjustable suspension means therefor - Google Patents

Oxygen mask assembly and adjustable suspension means therefor

Info

Publication number
GB839937A
GB839937A GB1457058A GB1457058A GB839937A GB 839937 A GB839937 A GB 839937A GB 1457058 A GB1457058 A GB 1457058A GB 1457058 A GB1457058 A GB 1457058A GB 839937 A GB839937 A GB 839937A
Authority
GB
United Kingdom
Prior art keywords
mask
spool
plate
pressure
strap
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
GB1457058A
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.)
WILLIAM GODFREY PATE
Original Assignee
WILLIAM GODFREY PATE
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
Priority to CA839937X priority Critical
Application filed by WILLIAM GODFREY PATE filed Critical WILLIAM GODFREY PATE
Publication of GB839937A publication Critical patent/GB839937A/en
Application status is Expired legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00Breathing 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
    • A62B18/08Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/084Means for fastening gas-masks to heads or helmets
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00Breathing 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
    • A62B18/08Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/10Valves

Abstract

839,937. Respiratory masks. PATE, W. G. May 7, 1958 [March 18, 1958], No. 14570/58. Class 81 12). A respiratory face-mask has a pressure-plate 15 on which adjustment means 17 is mounted and suspension means 12 having a flexible portion engaging the adjustment means. A mask 11 having an oxygen inlet 18 is suspended from a helmet 10 by a flexible strap 12. A pressure-plate 15 of aluminium alloy, nylon or fibre-glass which may be perforated, fits over the mask and around the gas inlet. The strap passes through guides 16 on the pressure-plate and through slots 29 in the adjustment means 17 mounted on the pressure-plate 15. Loops 22 on the mask pass through holes 23 in the pressureplate and over tabs 21 to secure the pressureplate and the mask together. A microphone housing 25 projects through or is covered by the pressure-plate. Inside the adjustment means 17, the strap passes through a slot 30 in a nylon spool 31 having at its lower end a bore 38. Fig. 5 (not shown). A worm-gear 35 is secured on the lower part of the spool by the head 43 of a T-bar which engages the spool slot 30 and the worm gear hub 36. The rod 42 of the T-bar passes through the spool bore and is attached to a cap 45 engaging a push-button 55 which may be depressed against a spring 44 to disengage the T-bar head from the worm-gear hub, thus releasing the spool to be rotated by a helical spring 46 made of phosphor-bronze or beryllium copper, so that the strap is wound on the spool to press the mask against the wearer's face. The helical spring is energized before using the mask by rotating knobs 62, 63 which rotate the spool through a worm 57 meshing with the wormgear 35. When the mask is in position, further adjustment is effected by rotating the spool by the knobs. To release the mask from the face the button 55 is pressed and the mask pulled away, the helical spring being re-energized as the strap leaves the spool. The gears may be made of cadmium steel.
GB1457058A 1958-03-18 1958-05-07 Oxygen mask assembly and adjustable suspension means therefor Expired GB839937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA839937X 1958-03-18

Publications (1)

Publication Number Publication Date
GB839937A true GB839937A (en) 1960-06-29

Family

ID=4172649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1457058A Expired GB839937A (en) 1958-03-18 1958-05-07 Oxygen mask assembly and adjustable suspension means therefor

Country Status (1)

Country Link
GB (1) GB839937A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2478305A (en) * 2010-03-02 2011-09-07 Joseph Anthony Griffiths Breathing mask tensioning mechanism
US9381316B2 (en) 2005-10-25 2016-07-05 Resmed Limited Interchangeable mask assembly

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10183138B2 (en) 2005-10-25 2019-01-22 Resmed Limited Interchangeable mask assembly
US9381316B2 (en) 2005-10-25 2016-07-05 Resmed Limited Interchangeable mask assembly
US9962510B2 (en) 2005-10-25 2018-05-08 Resmed Limited Respiratory mask assembly
GB2478305B (en) * 2010-03-02 2015-08-26 Joseph Anthony Griffiths Mask tensioning mechanism
GB2524679A (en) * 2010-03-02 2015-09-30 Joseph Anthony Griffiths Mask tensioning mechanism
GB2524679B (en) * 2010-03-02 2016-02-17 Joseph Anthony Griffiths Mask tensioning mechanism
GB2478305A (en) * 2010-03-02 2011-09-07 Joseph Anthony Griffiths Breathing mask tensioning mechanism

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