GB815498A - Improvements relating to pressure helmets breathing masks and the like - Google Patents
Improvements relating to pressure helmets breathing masks and the likeInfo
- Publication number
- GB815498A GB815498A GB728054A GB728054A GB815498A GB 815498 A GB815498 A GB 815498A GB 728054 A GB728054 A GB 728054A GB 728054 A GB728054 A GB 728054A GB 815498 A GB815498 A GB 815498A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vizor
- movement
- seal
- bar
- pressure
- 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
Links
- 230000029058 respiratory gaseous exchange Effects 0.000 title 1
- ZTMKADLOSYKWCA-UHFFFAOYSA-N lenacil Chemical compound O=C1NC=2CCCC=2C(=O)N1C1CCCCC1 ZTMKADLOSYKWCA-UHFFFAOYSA-N 0.000 abstract 11
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 3
- 229910052760 oxygen Inorganic materials 0.000 abstract 3
- 239000001301 oxygen Substances 0.000 abstract 3
- 210000003128 Head Anatomy 0.000 abstract 2
- 238000007789 sealing Methods 0.000 abstract 2
- 210000001331 Nose Anatomy 0.000 abstract 1
- 239000004744 fabric Substances 0.000 abstract 1
- 239000000789 fastener Substances 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000000241 respiratory Effects 0.000 abstract 1
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
- A62B18/04—Gas helmets
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
815,498. Respiratory appliances. TAYLOR, E. H., and BAXTER WOODHOUSE & TAYLOR Ltd. June 1, 1955 [March 12, 1954], No. 7280/54. Class 81 (2). In a pressure helmet a vizor is mounted for movement into and out of sealing engagement with an aperture opposite the eyes. In opening, the first movement of the vizor is forwardly away from the helmet to break the seal and the second movement is upwardly away from the opening. As shown, Fig. 1, the wearer moves the vizor bar 5 up or down in order to open or close the vizor 2, which in the closed position, fills the opening 4. Sealing is effected between 2 and the shell 1 by the deflatable means 16. A sun vizor 6 is movable independently, between 2 and 5. The helmet consists of a fibre front 1 which curves toward the front and top of the head and a rear part of fabric material 12 closed by a sliding fastener. Mounted on 1 are the intercommunication lead-in 8, oxygen supply pipe 11 and the emergency oxygen inlet 15. Pressurization is effected by an inflatable envelope (not shown) between 1 and 12 which envelopes the head and part of which forms the seal 16, and which includes an oxygen mask covering the nose and mouth. When 2 is closed on to a seal 16, the space in front of the. eyes can be maintained at the required pressure. Unsealing action. Movement of the bar 5 causes the vizor 2 to move about hinges 3. In one embodiment of hinge 3, Figs. 6, 7, movement of bar 5 upwards rotates shaft 29, through gearing 40, 41 and causes cranks 29 to move outward and forward thereby moving forward the vizor frame 20 away from engagement with seal 20 with further movement upwards of 5, the rotation of 29 is stopped by the engagement of the cam and stud 33, 36, a locking mechanism is released by 33 and the upward pressure on 5 carries the hinge cover 26 round the axis of spindle 25 and raises 2 above 4, against the action of the spiral spring 47. In a second embodiment, not shown, the cam and stud 33, 36 is replaced by a cam which engages with two slots in the case and base plate. In a third embodiment, Figs. 18, 19, the support rods 61 of the vizor frame 20 are urged along the slots 62 by rotation of the eccentric 53 inside the internally threaded collar 60 by the initial unsealing movement of vizor bar 5. Subsequent raising of the vizor takes place against the action of spring 70. In all the embodiments, the vizor is held in the open position by a spring catch device (not shown). Specification 815,499 is referred to.
Publications (1)
Publication Number | Publication Date |
---|---|
GB815498A true GB815498A (en) | 1959-06-24 |
Family
ID=1628925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB728054A Expired GB815498A (en) | 1954-03-12 | Improvements relating to pressure helmets breathing masks and the like |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB815498A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3128469A (en) * | 1959-08-06 | 1964-04-14 | Ml Aviation Co Ltd | Flying helmets |
DE1190341B (en) * | 1961-03-14 | 1965-04-01 | Ml Aviation Co Ltd | Hood for pressure suits |
US3239843A (en) * | 1961-03-14 | 1966-03-15 | Ml Aviation Co Ltd | Flying helmets |
DE1226423B (en) * | 1959-08-06 | 1966-10-06 | White Waltham | Hood for pressure suits |
US3833935A (en) * | 1972-05-22 | 1974-09-10 | Sierra Eng Co | Integrated helmet and mask structure |
GB2244908A (en) * | 1990-06-12 | 1991-12-18 | Lee Shu Chin Chen | Motorcycle helmet angle-adjustable wind visor mounting structure |
CN111617396A (en) * | 2020-05-07 | 2020-09-04 | 深圳迪致科技术有限公司 | Positive pressure respirator |
CN111973902A (en) * | 2020-09-01 | 2020-11-24 | 广州益善通新材料科技有限公司 | Operation type chemical oxygen respirator |
US11213089B2 (en) | 2019-06-04 | 2022-01-04 | Msa Technology, Llc | Protective helmet with face protection shield and linkage mechanism |
CN114515398A (en) * | 2021-12-30 | 2022-05-20 | 中国人民解放军火箭军特色医学中心 | Protective mask communication device |
US20230172302A1 (en) * | 2021-12-07 | 2023-06-08 | Rugged Race Products, Inc. | Universal helmet pumper skirt |
-
1954
- 1954-03-12 GB GB728054A patent/GB815498A/en not_active Expired
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3128469A (en) * | 1959-08-06 | 1964-04-14 | Ml Aviation Co Ltd | Flying helmets |
DE1226423B (en) * | 1959-08-06 | 1966-10-06 | White Waltham | Hood for pressure suits |
DE1190341B (en) * | 1961-03-14 | 1965-04-01 | Ml Aviation Co Ltd | Hood for pressure suits |
US3239843A (en) * | 1961-03-14 | 1966-03-15 | Ml Aviation Co Ltd | Flying helmets |
US3833935A (en) * | 1972-05-22 | 1974-09-10 | Sierra Eng Co | Integrated helmet and mask structure |
GB2244908B (en) * | 1990-06-12 | 1994-01-12 | Lee Shu Chin Chen | Motorcycle helmet angle-adjustable wind visor mounting structure |
GB2244908A (en) * | 1990-06-12 | 1991-12-18 | Lee Shu Chin Chen | Motorcycle helmet angle-adjustable wind visor mounting structure |
US11213089B2 (en) | 2019-06-04 | 2022-01-04 | Msa Technology, Llc | Protective helmet with face protection shield and linkage mechanism |
CN111617396A (en) * | 2020-05-07 | 2020-09-04 | 深圳迪致科技术有限公司 | Positive pressure respirator |
CN111617396B (en) * | 2020-05-07 | 2022-02-25 | 深圳迪致科技术有限公司 | Positive pressure respirator |
CN111973902A (en) * | 2020-09-01 | 2020-11-24 | 广州益善通新材料科技有限公司 | Operation type chemical oxygen respirator |
US20230172302A1 (en) * | 2021-12-07 | 2023-06-08 | Rugged Race Products, Inc. | Universal helmet pumper skirt |
CN114515398A (en) * | 2021-12-30 | 2022-05-20 | 中国人民解放军火箭军特色医学中心 | Protective mask communication device |
CN114515398B (en) * | 2021-12-30 | 2022-10-18 | 中国人民解放军火箭军特色医学中心 | Protective mask communication device |
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