US3135963A - Face mask lens attaching means - Google Patents
Face mask lens attaching means Download PDFInfo
- Publication number
- US3135963A US3135963A US111591A US11159161A US3135963A US 3135963 A US3135963 A US 3135963A US 111591 A US111591 A US 111591A US 11159161 A US11159161 A US 11159161A US 3135963 A US3135963 A US 3135963A
- Authority
- US
- United States
- Prior art keywords
- bead
- rims
- lens
- holes
- face mask
- 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 - Lifetime
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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
- A62B18/082—Assembling eyepieces, lenses or vision-correction means in or on gas-masks
Definitions
- This invention relates to a face mask for covering the eyes, nose and mouth of the wearer, such as used in gas masks, but is also applicable to masks for covering just the eyes, or the eyes and nose of the wearer.
- An object of the present invention is to provide a novel lens attaching means for face masks which is devoid of the above named disadvantages and which comprises relatively simple and inexpensive parts which can be detached or attached easily and quickly by the ordinary workman by the use of only a screw driver.
- a further object of the invention is to provide a lens attaching means for face masks that will insure a gastight seal.
- FIG. 1 is a front, elevational view of a face mask of the type used for gas masks and including lens attaching means embodying the principles of the present invention
- FIG. 2 is a top view of the mask shown in FIG. 1;
- FIG. 3 is an enlarged, fragmentary view of a side portion of the lens attaching rims 6 and 9 shown in FIGS. 1 and 2;
- FIG. 4 is an enlarged, fragmentary, cross-sectional view taken through one of the rivet-nut combinations shown in FIG. 2;
- FIG. 5 is an enlarged, cross-sectional view, similar to FIG. 4 but showing a modified construction of the bead 1a so as to completely surround the rivet-nut combination.
- numeral 1 denotes a gas mask type of face piece of rubber or other suitable flexible material, having integrally molded thereon a seat 2 for supporting an exhalation valve (not shown) and a tube 3 to which is attached a canister (not shown) in a well known manner for filtering inhaled air before it enters the mask.
- the mask is held onto the head of the wearer by means of head straps 4.
- head straps 4 The construction described so far is well known in the art.
- the lens attaching means embodying the present invention comprises an integral bead 1a integrally molded on the mask 1 and defining the perimeter of the single lens 5 of safety glass or transparent plastic material.
- the integral bead 1a has an internal, central groove into which the perirnetrical edge of lens 5 is fitted.
- Rim 9 is provided, on opposite sides, with a pair of integral tongues 10, such as that shown in 3,135,963 Patented June 9, 1964 FIG. 3, which extend between projections 11 formed in the outer edge of rim 6, for locking together the rims 6 and 9 in properrelationship.
- a plurality of rivet-nut combination elements 8 each comprising, at one end, a rivet portion for rigidly holding the element to rim 9, and, at the other end thereof, an internally threaded well portion into which the threads of a machine screw 7 are screw threaded so that upon tightening of the screw 7, by turning thereof by means of an ordinary screw driver, rims 6 and 9 are forced to move toward each other and thereby compress bead 1a, so as to tightly grip the perimetrical edge of bead 1a to form a gas-tight seal with lens 5 until, finally, the rim 6 is stopped from further movement by abutting the mouth portion of the threaded well.
- This provides'a very rigid, but yieldable, connection between rims 6 and 9 and the bead 1a.
- the rivet-nut elements 8 may be entirely omitted and the threaded shank of machine screw 7 may be screwed directly into an internally threaded hole portion of rim 9, however, this has the outstanding disadvantage that it is often difiicult to insert screw 7, particularly if long, into such threaded hole of rim 9.
- the rivet-nut elements 8 are visible from the top of the mask (also from the sides and bottom).
- the modification shown in FIG. 5 may be employed wherein the parts are identical to those in FIG. 4, corresponding parts bearing the same numerals which are primed, the only difference being the radially outwardly extension of bead 1a so as to completely enclose the rivetnuts 8.
- spaced holes would have to be molded in the bead 1a to accommodate elements 8'.
- a slit may be provided in the plane of FIG. 5, extending from the rivet-nut element 8' radially outwardly to enable slipping of rims 6 and 9' onto bead 1a merely by moving it through such slits, downwardly between the rims, as viewed in FIG. 5.
- screws 7 are shown with single kerfs, they may each have, instead, a pair of intersecting kerfs at right angles, as in the well known Phillips Head type screw.
- the only tool needed by the operator is an ordinary screw driver for unscrewing the various screws 7 to remove rim 6 and thereby obtain access to enable removal of the lens 5, when broken or scratched, and replacement thereof by a new lens, after which rim 6 is again held by rim 9 by screwing the screws 7 into the threads of the well portions of elements 8.
- a face mask assembly comprising a face mask having a lens opening, a bead integrally formed on said mask and defining said opening, a groove formed in the opening-defining surface of said bead, a lens having a perimetrical portion closely fitted in said groove, a pair of lens retaining rims disposed on opposite edges of said bead in spaced, parallel relationship with each other and with said lens, a plurality of uniformly spaced, registering holes formed in said rims throughout their entire perimeters, a plurality of machine screws extending through said holes of one of said rims, a plurality of rivet elements firmly secured within said holes of the other of said rims, said rivet elements each including an internally threaded shank portion of equal length projecting towards the registering hole of the other rim, into which threaded shank portion one of said machine screws is threaded, said shank portion being of smaller length than the width of said bead and larger in diameter than the holes in the rims so that its free end will serve as a limit
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- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US111591A US3135963A (en) | 1961-05-22 | 1961-05-22 | Face mask lens attaching means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US111591A US3135963A (en) | 1961-05-22 | 1961-05-22 | Face mask lens attaching means |
Publications (1)
Publication Number | Publication Date |
---|---|
US3135963A true US3135963A (en) | 1964-06-09 |
Family
ID=22339365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US111591A Expired - Lifetime US3135963A (en) | 1961-05-22 | 1961-05-22 | Face mask lens attaching means |
Country Status (1)
Country | Link |
---|---|
US (1) | US3135963A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050273900A1 (en) * | 2004-06-10 | 2005-12-15 | Deyoung Roger L | Welding shield |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2303155A (en) * | 1941-03-04 | 1942-11-24 | Berge Victor | Diving mask and apparatus |
GB637413A (en) * | 1947-11-11 | 1950-05-17 | Guest Keen & Nettlefolds Ltd | Improvements in blind hole fasteners |
US2648843A (en) * | 1951-01-10 | 1953-08-18 | Jack B Hirschmann | Goggles |
US2952853A (en) * | 1956-06-26 | 1960-09-20 | Scott Aviation Corp | Means for detachably attaching a lens to a face mask |
-
1961
- 1961-05-22 US US111591A patent/US3135963A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2303155A (en) * | 1941-03-04 | 1942-11-24 | Berge Victor | Diving mask and apparatus |
GB637413A (en) * | 1947-11-11 | 1950-05-17 | Guest Keen & Nettlefolds Ltd | Improvements in blind hole fasteners |
US2648843A (en) * | 1951-01-10 | 1953-08-18 | Jack B Hirschmann | Goggles |
US2952853A (en) * | 1956-06-26 | 1960-09-20 | Scott Aviation Corp | Means for detachably attaching a lens to a face mask |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050273900A1 (en) * | 2004-06-10 | 2005-12-15 | Deyoung Roger L | Welding shield |
US7000251B2 (en) * | 2004-06-10 | 2006-02-21 | Campbell Hausfeld/Scott Fetzer Company | Welding shield |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: C & D ACQUISITION CORP., 280 PARK AVE., NEW YORK, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INCO SAFETY PRODUCTS COMPANY;REEL/FRAME:003955/0259 Effective date: 19810730 Owner name: MANUFACTURERS HANOVER COMMERICIAL CORPORATION, 121 Free format text: SECURITY INTEREST;ASSIGNOR:C & D ACQUISITION CORP.;REEL/FRAME:003955/0272 Effective date: 19810730 Owner name: C & D ACQUISITION CORP., A CORP. OF DE., NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INCO SAFETY PRODUCTS COMPANY;REEL/FRAME:003955/0259 Effective date: 19810730 Owner name: MANUFACTURERS HANOVER COMMERICIAL CORPORATION, A C Free format text: SECURITY INTEREST;ASSIGNOR:C & D ACQUISITION CORP.;REEL/FRAME:003955/0272 Effective date: 19810730 |