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Air supply system for welders' helmets

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US2577607A
US2577607A US14449750A US2577607A US 2577607 A US2577607 A US 2577607A US 14449750 A US14449750 A US 14449750A US 2577607 A US2577607 A US 2577607A
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Prior art keywords
air
strip
material
spaced
supports
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Expired - Lifetime
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Thomas A Conley
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American Optical Corp
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American Optical Corp
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/04Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
    • A61F9/06Masks, shields or hoods for welders
    • A61F9/068Masks, shields or hoods for welders with supply or suction of gas, air or smoke inside or outside the welding hood
    • 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
    • A62B18/003Breathing 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 having means for creating a fresh air curtain

Description

1366- 1951 'r. A. CONLEY AIR SUPPLY SYSTEM FOR WELDERS HELMETS 2 SHEETS-Sl-EET 1 Filed Feb. 16, 1950 INVENT 0R THOMAS A.. CONLEY ATTORNEY Dec. 4, 1951 T. A. CONLEY 2,577,697

AIR SUPPLY SYSTEM F OR WELDERS HELMETS Filed Feb. 16, 1950 2 SHEETS-SHEET INVEN'IOR THOMAS A. CONLE-Y a gan ATTORNEY Patented Dec. 4, 7951 7 AIR SUPPLY SYSTEM FOR WELDERS I HELMETS I Thomas ArConley, HarrisvilleQR. I4. assignor t American. Optical Company, Southbridge,

"Mass avol'untaryassoeiation bf Massachusetts Application February 1c; 1950, Serial No. 144,496

9Claim's. (01. 128-1 42) 1 mg'i yn bii relates to improvements in prowe er c sg e nature of w n fhelnets iand' has particular reference to the provision of novel means of supplying filtered air to the wee eisl ahhe t Oneof the principal objects of the invention is toprovide devices of the nature of welding helmets'with novel means for supplying filtered air underpressure directly into the breathing zone of the wearerof such helmets.

other "obi "ct is to provide. a device} of the above character. wherein the volume of air necessary for efliciency 7 may be supplied at extremely low pressure and with minimum resistancetoair flotvJ w f Anotherobjeot-is to provide an arrangement of I ithe'a'bove character wherein the danger; of causinginiurious ffumes to be drawn beneath the weldinghelmetisi'greatly reduced and substantially completely obviated.

Q Another object isto provide an arrangement of theabove'charact'er which obviates the obnoxious noises andturbulences inherent with mo'st prior art devices of .the' type wherein the air is not baflled during its entry within the helmet. Another object is to provide adevice of the abcwe, character which simultaneously functions as a comfortable chi'nrest to hold the base of the helnijetfaway from the faceof the wearer."

Otherfobjects and'advantages of theinvention will become apparent'from the following description taken in connection with the accompanying drawing'sJ-*: It is apparent that many changes may be made in the details of construction'and arrangement of 'partsshown and described without departingfrom the spirit of the invention as expressedin the accompanying claims. 'Ltherefore, do not wish-to be limited to the exact details 'of construction andarrangement of parts shown and described as the preferred forms only have been given by way of illustration. Referring tothe drawings; 7 Fig; 1 is a front elevational view of the device embodying the invention; r

Fig; 2*is a fragmentary sectional view taken as on line 2 2 of Fig. l and looking in the direction indicated by the arrows;

- Fig. '3-is a frag entary sectional view taken as on lin'e 3-3 of Fig. 1' and looking in the direc-- tion indicated by the arrows Fig.4 is a view generally similar to Fig. 3 illustrating a modified form of the invention; and

Fig. 5 is a sectional view taken as on line 55 of Fig. 4 and looking in the direction indicated bythe arrows.

'iheproviding of air under pressure internally of welding helmets or similar devices is not new in the art. Most prior. art arrangements, however, were such that the air was forced under relatively high pressure into the-helmet through a direct feeder line from a compressor for the main purpose of reducing the temperature internally of the helmet and also to prevent the entry of injurious fumes, dust, or other foreignmatter.

. Such direct'air-lines introduced difliculty such as the forcing of water 'due to condensation in the linesth'roug'h the air lines. The forcing of oil or rust particles or other debris through the-air lines leading fromthe compressor, were also hazardous. Another undesirable characteristic wasthat of the inherent obnoxious noises such as whistling caused by air turbulences which were 'created'by such direct airlines. In many instancesin the past. there was also the danger of creating a Venturi action with the danger of causing injurious fumes v to be sucked internally of the helmet and into the breathing zone of the wearer.

The present invention, therefore, is directed rangement whereby the prior art obnoxious noises are eliminated and substantially all danger of drawing injuriousfumes internally of the hel met are obviatedf A further feature of the invention resides in the provision of a deviceof the above character which; requires a relatively low air pressure and which will simultaneously function as exceedingly comfortable chin-rest means for retaining the shape of the helmet in desired spaced relation and which will also function to block the entry of fumes into-the bottom of the helmet. Another feature is that of providing a device of the above character which is exceedingly simple and inexpensive in nature and light inweight. 7

' Referring more particularly to the drawings wherein like characters of reference designate like parts throughout the several views, the device embo y n the invention comprises a face shield 4 formed of relatively stiff shock and impact resisting material having a suitable window 5 therein'through which a relatively wide range of vision is afforded the wearer. The main shield portion 4 is supported on the head of the wearer by a suitable headband arrangement (not shown)' of conventional design I la man cube. sh l a d. m he v t o the chin-rest of the wearer, the device to which the invention is more particularly directed comprises a pair of strips I and 8 of material substantially the same as that used in forming the main shield portion 4 whichmaterial may be of suit able fiber, compressed "paper or; similar means. The strips 1 and 8 are'positioned in overlapping relation with each other adjacent, the free ends thereof and are pivotally connected to the main shield 4 by suitable pivot means 5, The strip! is looped forwardly about a radius which is less than that of the curvature of the front portion of the main shield 4, as shown best in Fig. 3, Y

whereby it will be slightly spaced from saidshield for relatively free pivotal movement. The strip 8, as it extends forwardly of the pivots '9, is spaced 7 with respect to the strip 1 as it progresses forwardly and is provided with an intermediate portion I0 located at a considerably spaced relation with respect to'th'e intermediate portion II of the strip 1. In between the said intermediate portions I0 and IL'th'BTG is provided a'nroval shaped strip I2 ror'med'of material similar to that of strips I and 8 and to substantially the same width as said strips having its ends I3 and I secured in overlapping relation with each other by-suitable rivets or the like I5, The longitudinal sides of the oval shaped strip I2 are shaped substantially to the same shape as the intermediate portions Ill and II. They are held in relatively intimate relation by suitable rivets or the like I6. In the -end of the oval shaped member I2 having the overlapping portions I3 and {I4, there is formed an opening through which a suitable airline I'I isextended. This maybe in the form of rubber tubing or other suitablemeans.

The assembly, comprising the intermediate speedrof air flow desired therethrough'and according to the pressure desired in the air line H. The oval shaped portion I2 and the covering of felt material I8 form a chamber I9 into which the air from the air line I! is directed. The ends 20 and 2| constitute the end walls of the chamber while the felt covering which overlies the upper and lower open sides of the oval shaped strip I2 constitute the upper and lower walls 22 and 23 respectively of the chamber. a

Theair line I! is connected with a suitable air compressor whereby air may be directed under pressure into thechamber I9 and forced through the upper and lower walls 22 and 23. This causes a clean flow of air directly to the breathing zone of the wearer while simultaneously causing a flow of air in a direction outwardly of the lower side or bottom of the helmet for preventing the formation of a Venturi action whereby injurious fumes, dust or other foreign matter may be drawn internally of the helmet. The strips 1 and 8 and the oval shaped portion I2 are formed relatively resilient and they func tio'n cooperatively with the felt covering I 8 to provide a relatively comfortable and eii icientchin rest means for retaining the front of the helmet in desired spaced relation with the face of the wearer. Suitable adjustments whereby the filter chamber I9 may be located in proper relation with the wearer is provided by the pivots 9.

The felt or other suitable material 8' is such that when air is forced therethroughunder pressure there will be little, if any, noise created 7 thereby.

While the device functions as extremely eiiicient filterin means of the above character, it

desirable degree.

It is to be understood that the felt covering I8 is so formed as to have a relatively intimate fit about the oval shaped member I2 in order to "form a suitable closed chamber I9. The felt covering may comprise a plurality of sections secured in stitched relation with each other along their meeting edges 24 or otherwise joined in sealed relation with each other, as illustrated best in Fig.2.

In Figs. 4 and 5, there is illustrated a modified form 'of the invention which comprises a single strip of material 25 pivotally connected adjacent its opposed ends'as illustrated at 26fto'th'e face shield 21; The strip 25 is formed of pressed paper, fiber or other suitable relatively stiff and yet flexible material. The said strip 25 has a strip 28 having substantially the same characteristics as said strip 25 secured thereto. The 'saidstrip28 has its ends 29 looped and turned forwardly and secured to said strip 25 by suitable rivets or the like 38. Intermediate the forwardly curving portions of said strip 25 and the strip 28, there is positioned a looped strip3l having its ends 32 secured in overlapped relation with each other and tothe intermediate "portion of the strip 25 as'by the rivet or the like 33. The said member 3I functions as spacer means for'retaining the intermediate portions of the strip'25' and the strip 28 in spaced-relation with each other. One of the looped ends 29 of the strip 28 is provided Withan opening through which a suitable air line 34 is extended. The looped strips" 28 and 3f are provided with a covering of suitable filtering material such as felt, paper or other desirable filtering means 35 whereby the said looped strip 28 and the forwardly curving portion of the strip 25 will form an air chamber 36 into which air may be directed throughto the air line 34. The strip 3|, as shown in Figs. 4 a d 5, is .of less idth than the stri s 25 amaze and the air, thereforeisiree to pass throughout the lengthfofthe chamber 36 through the spaces 37 eetween said felt filter coveringand the upper and lowerfedges of the strip 3 I. The felt covering orfiltering material 35 may be formed of a plurality of sections joined along their longitudinal edges 38by stitching or other suitable means- The said looped strip 3| functions as a chin-rest or spacer means for retaining the shield in proper spaced relation with the face while the air filter, in this instance, will function ina manner similar to the previouslydescribed filter, that is, it will not only prevent entrance of injurious fumes or the like beneath. the face shield but willalso supply filtered air directly to the breathii'ig zone of the wearer.

From the foregoing description, it will; be seen that simple, efiicient a'ndeconomical-means and methods have been provided for accomplishing all of the objectsand advantages of the invention. Having described my invention; I" claim:

1; In a device of the character described embodying a face shi ld, a pair'of spaced supports connected to each other adjacent the opposed ends thereof, one'of said supports being pivotall y connectedad'jac'ent ijts'oppose'dends to the shield internally thereof, an oval shaped member fitted between .said supports, an airline extending within's'aid oval shaped member, and filtering material overlying the opposed open sides of the oval shaped member and functioning cooperatively with said member to form a chamber into which air is directed by the air line.

2. In a device of the character described embodying a face shield, a pair of supports having arcuately shaped intermediate portions joined with each other adjacent their opposed ends, one

of said supports being pivotally connected, ad-

jacent its opposed ends, internally of the shield, filtering material overlying the opposed open sides of said pair of supports throughout the major portion thereof and means for directing a flow of air within said spaced supports and the filtering material.

3. In a device of the character described comprising a face shield, a pair of relatively thin strips of resilient material joined with each other with the major portion thereof in spaced relation with each other, one of said strips being pivotally connected adjacent its opposed ends internally of the shield, means formed of resilient material positioned between said spaced strips and forming spaced wall portions extending transversely of said spaced strips, one of said wall portions having an opening therein, an air line extending through said opening, and filtering material overlying the opposed open sides of said strips and said spaced wall portions to form a chamber into which the air is directed.

4. In a device of the character described com prising a face shield, a pair of spaced supports connected to each other, one of said supports being pivotally connected adjacent its opposed ends internally of the shield, filtering material overlying the opposed open sides of the spaced supports and an air line for directing air between said supports and the filtering material.

5. In a device of the character described comprising a face shield, a pair of supports formed of relatively thin resilient material, said supports being joined with each other adjacent the opposed ends thereof in such a manner as to cause the intermediate portions of said strips to be spaced relative to each other, a relatively thin strip of resilient material having its opposed ends secured in overlapping relation with each other with said strip lying between said first mentioned strips and secured to at least one thereof, said strip having its ends secured in overlapping relation having an opening in the side wall thereof, filtering material wrapped around said strips and having its meeting ends secured together to form a casing of filtering material surrounding said strips and means for directing a flow of air through said openings and into the spaced strips beneath the filtering material.

6. In a device of the character described comprising a face shield, a pair of supports pivotally connected adjacent one end thereof to said shield and having their intermediate portions in spaced relation with each other, an oval shaped strip fitted between said supports adjacent the front of the shield and internally thereof, an air line extending within said oval shaped member and a covering of suitable filtering material extending about said supports and oval shaped member to looped end portions secured adjacent its free ends to the first ribbon-like strip at a position spaced from the respective pivots with said looped ends causing the major portion of said second strip to be spaced relative to the first strip, filtering material overlying the opposed opened sides of saidrespective strips and means for directing a flow of air between said strips beneath the filtering material.

8. In a device of the character described comprising a face shield, a pair of spaced supports secured to each other, one of said supports having connection means adjacent its opposed ends for connection internally of the shield, filtering material overlying the opposed open sides of the spaced supports and means for directing a flow of air between said supports and the filtering material.

9. In a device of the character described comprising a face shield, a pair of supports formed of relatively thin strips of resilient material secured to each other with an intermediate portion thereof in spaced relation, one of said supports having means adjacent its opposed ends for connection internally of the face shield, filtering material overlying the opposed open sides of the spaced intermediate portions of said supports, and means for directing a fiow of air between said supportsand the filtering material.

THOMAS A. CONLEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,878,464 Bulmer Sept. 20, 1932 2,062,834 Schwartz Dec. 1, 1936 2,377,122 Bakke May 29, 1945 2,507,705 Gaddini May 16, 1950

US2577607A 1950-02-16 1950-02-16 Air supply system for welders' helmets Expired - Lifetime US2577607A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896617A (en) * 1955-11-03 1959-07-28 Wesley A Gibbons Air supplied hood structure
US3112745A (en) * 1961-05-11 1963-12-03 Electric Storage Battery Co Air supply attachment for welding helmet
US3601219A (en) * 1970-06-01 1971-08-24 Bullard Co Air distribution plenum with silencer for head enclosures
US4577348A (en) * 1982-08-11 1986-03-25 Auergesellschaft Gmbh Gas-tight protective garment with hood
US4961916A (en) * 1988-06-02 1990-10-09 Irsst-Institut De Recherche En Sante Et En Securite Du Travail Du Quebec Sampling device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878464A (en) * 1929-07-24 1932-09-20 Frederick R M Bulmer Mask
US2062834A (en) * 1935-07-06 1936-12-01 Schwartz Nathan Filtering device or separator for filter type respirators or the like
US2377122A (en) * 1943-03-26 1945-05-29 Mathlas J Bakke Welding helmet
US2507705A (en) * 1947-10-27 1950-05-16 Norman E Gaddini Face mask

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878464A (en) * 1929-07-24 1932-09-20 Frederick R M Bulmer Mask
US2062834A (en) * 1935-07-06 1936-12-01 Schwartz Nathan Filtering device or separator for filter type respirators or the like
US2377122A (en) * 1943-03-26 1945-05-29 Mathlas J Bakke Welding helmet
US2507705A (en) * 1947-10-27 1950-05-16 Norman E Gaddini Face mask

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896617A (en) * 1955-11-03 1959-07-28 Wesley A Gibbons Air supplied hood structure
US3112745A (en) * 1961-05-11 1963-12-03 Electric Storage Battery Co Air supply attachment for welding helmet
US3601219A (en) * 1970-06-01 1971-08-24 Bullard Co Air distribution plenum with silencer for head enclosures
US4577348A (en) * 1982-08-11 1986-03-25 Auergesellschaft Gmbh Gas-tight protective garment with hood
US4961916A (en) * 1988-06-02 1990-10-09 Irsst-Institut De Recherche En Sante Et En Securite Du Travail Du Quebec Sampling device

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