US1730390A - Welder s hood - Google Patents

Description

Oct. 8, 1929, M, STEIN 1,730,390

WELDERS noon Filed May 16, 1927 2 Sheets-Sheet l Oct. 8, 1929. s E 1,730,390

WELDER S HOOD Filed May 16, 1927 2 Sheets-Sheet 2 welding rods.

Patented 9i,

[UhllTEll @Fl lQE AS STGNUR, BY IVEESNE ASSIGNMENTS, TO CHTCAG-O, ILLINUIS, A CORPORATION OF "WELDERS H001) Application filed May 16,

This invention relates to welders hood, and more particularly to means for permitting ready viewing of the work.

In weld-crs hoods it is the common practice to provide a sight opening which is normally closed by a window carrying a pane or sheet of dark glass or other suitable translucent material to protect the weldefs eyes from the eflect of the intense light or glare during the welding operation. This dark glass permits the Work to be viewed in a general way during the welding operation but, necessarily, does not give a clear view of the details of the work. For this reason it has been proposed to provide hingedly mounted windows for welders hoods, this window being capable of being raised by hand to permit the welder to view the work more clearly. This arrangement is objectionable in that it necessitates the use of the hand for opening the window and holding it open briefly, which is not at all times practicable. This is particularly true as regards the welders helper who usually has both hands occupied holding the work and the It is the present practice for the welders helper to work wi hout a hood due to the necessity of his watching the work closely and the fact that as a general. rule, both of his hands are occupied. One of the main objects of my invention is to provide a welders hood having means whereby the window can be opened and closed without necessitating the use of the hand, this hood being, therefore, adapted to be used by both the welder and his assistant. A further object is to pro vide simple and efficient means for holding the window in raised or open position and for releasing the window to permit closing thereof, such means being also operated witnout the necessity of using the hand. Another object is to provide simple means of the character stated which can be readily applied to hoods of standard construction at small cost. Further objects and advantages will appear from the detail description.

In the drawings:

Fig. 1 is a front view of a welders hood of standard construction to which my invention is applied;

Fig. 2 is a side View;

1827. Serial N0. 191,664.

Fig. 8 is a rear view of the hood? showing my invention applied thereto;

Fig. 4c is a fragmentary section, on an enlarged scale, taken substantially on line l4l of Fig. 3;

Figs. 5 to 8, inclusive, are fragmentary sectional views similar to Fig. l showing the relative positions of the various parts of the device i" successive steps of opening and closing the window;

l? i g. 9 is a detail of the latch member;

Fig. 10 is a detail of the releasing finger; and

Fig. 11 is a section taken substantially on line ll-11 of Fig. 6.

The hood 1 is of known construction, being usually formed of fibre or other suitable material. A head gear 2 is mounted within the hood for supporting the same upon the wearers head with the sight opening 3 in substan tial alignment with the eyes. The head gear 2 is mounted in the hood for relative turning movement to facilitate placing of the hoodupon the head and its removal. The manner of constructing the hood and the head gear, and of mounting the same is well known in this art and need not be described or illustrated in detail, it being understood that the hood and the associated head gear illustrated are of standard construction which are well known in the welding art.

I provide a suitable rectangular frame 4: of sheet metal which is secured about the sight opening 3 in any suitable manner as by means of screws 5 and nuts 6 threaded thereon. A holding frame 7 is secured to the base flange of frame 4; in any suitable manner, as by soldering, in spaced relation to flange 8 of the frame. A sealing and cushion strip 9 of felt or other suitable material is secured between the frame 7 and flange 8 and projects beyond the same to contact with the inner face of a sheet metal window frame 10. Frame 10 is provided adjacent each corner of its upper end with a sleeve 11 which receives the end portion of a pintle rod 12 mounted through sleeves 13 at the top of frame 4t. A coiled wire spring 14 is mounted about the rod 12 with one end bearing against the upper portion of hood 1., the other end of this spring bearing against the outer face of Window frame 10 and acting to normally hold the window closed. Frame 10 is provided with an inwardly projecting flange forming a housing 15 for reception of a pane of glass 16 disposed in rear of opening 1? through frame 10, this housing being of slightly less size than the sight opening 3. The glass pane 16 is retained in housing 15, therefore, by a resilient bowed retaining member 18 the ends of which engage beneath flanges 19 provided on housing 15 for this purpose. Obviously, any other suitable means may be employed for securing the glass in its housing. The glas. 16 is very dark and substantially opaque in ordinary light so as to protect the welders eyes from the injurious effect of the intense glare produced during welding. It is de sirable, for this reason, to provide means whereby the window can be raised, when desired, to permit the welder or his helper to inspect the work closely. For this purpose 1 have provided means which can be readily operated by the chin for opening the window as desired.

The window frame 10 is provided, at each end thereof, with an arcuate arm 20 Wl'llCll is rigidly secured to the frame and extends rear- Wardly and upwardly therefrom. A stirrup 21 is mounted within hood 1 by means of links 22 of fiber or other suitable material, the upper ends of these links being pivoted to the hood and the lower ends of the links being pivoted to the stirrup. The upper end of each arm of the stirrup is pivotally connected to the upper end of the corresponding arm 20 by means of a screw 23 and a nut 24 threaded thereon, suitable spacers 25 being interposed between the arms 20 and the upper ends of the arms of the stirrup. A chin strap 26 is adjustably secured in the lower portion of the stirrup by means of headed pins 27 secured in the arms of the stirrup, these pins being adapted for cooperation with any one, selectively, of a plurality of keyhole slots 28 provided in the upper end portion of each arm of the chin strap. Preferably, though not necessarily, the central portion of the chin strap is secured to the central portion of the stirrup by a screw 29 and a nut threaded thereon, or in any other suitable or preferred manner. 1 also preferably provide an adjustable connection between the arms of the stirrup and the arm 20 of the window frame 10. For this purpose the arms of stirrup 21 are provided at their upper end portions with a vertical series of openings 30 through any selected one of which the securing screw 28 can be passed. Chin strap 26 is also preferably provided with a front strap 27 secured thereto and disposed to pass about the front portion of the chin for holding the main chin strap 26 properly positioned, in conjunction w1th the links 22. l fhen the parts are properly ad usted, the chm strap 26 is disposed immediately beneath the wearers chin so that by lowering the chin the window can be readily moved into open position so as to permit the worlc to be viewed clearly through the sight opening 3. Raising the chin permits raising of the stirrup and closing of window 10 by the ring 1 1.

To facilitate retaining of the window in open position I provide means controlled by the operation of the stirrup for securing the window open and for releasing it to permit closing, thereof when desired. Referring more particularly to Figs. l to 8, inclusive, a supporting bracket 31 of substantially L- shape in plan View is rigidly secured to the front of hood 1 above the sight opening 3 and adjacent one end thereof. The outer depending arm of this bracket has i s lower end shaped to provide a tapered or pointed element which extends into a conical recess in the upper end of a bearing ferrule E l provided at its upper end witn an outer an-- nular shoulder 35. An expansion coil spring 36 is moimi'ed about the body portion of ferrule 31-, at its upper end, the lower end portion of this spring being mounted about a similar ferrule 37 which receives a pointed or taoered element 38 projecting upwardly from the lower portion 39 of a latch member 39 which is rockably and slidably mounted upon the arm 81. This member is provided with an arcuate slot e0 through which passes a screw 4:1, this screw passing through an opening in the arm 31, and a nut d2 being threaded upon the inner end of the screw. The hook portion 39 of the latch member 39 is disposed at an angle to the lower portion 39, the bill 4-1 being extended in substantial parallelism with portion 39" to provide a slot 12 for reception of a detent d3 extending inwardly from the adjacent arm 20 substantially at right angles thereto. Movement of the member about the pin or screw il is limited by a pin l4: secured in portion 39" adjacent the upper end thereof, this pin projecting through a rectangular opening 45 which extends through the arm 31. A. trip or release finger -4516 is pivoted on the screw l-l at the outer face of member 39. This linger is provided at its lower end with a slot l? which receives a pin .48 secured to member 39 below slot 40 and projecting from the outer face of this member. in inoperative position (Fig. 8) the finger l6 projects forwardly beyond arm 20 in position to be struck by a trip pin 48 carried by arm 20. This serves to return the latch member to operative position for engagement with detent 43 when the stirrupis again operated for opening the window.

'llhe operation of the latch mechanism will be clearly understood by reference to Figs. 5 to 8, inclusive. In Fig. 5 the parts are shown in their normal positions, i. e., the po sitions which they occupy when the window lVhen the latch member 39 is is closed. Upon downward movement of the stirrup for opening the window, the window is raised and as it approaches its uppermost position the detent 43 contacts with the inner rounded edge of the hook portion of latch member 39 rocking this member about the screw 41 and moving it into the position illustrated in Fig. 6. The detent then passes beyond the end of the hook bill 4L1 so as to permit the detent to enter the slot 12. At this time the spring 36, which is not moved beyond center position, acts to swing the latch member about the screw 41 so as to cause the hook portion to move towr rd the de tent and upon release of the stirrup the detent 43 enters slot 42 and causes the latch member to be moved upwardly and inwardly about screw 41 due to movement of arm 20 caused by slight downward movement of the window upon release 01 the stirrup. This swings the lower portion of latch member inwardly so as to dispose the spring 36 with its lower end inwardly beyond center as I have illustrated. This upward antx inward movement of the latch. member w'th the detent is limited by contact of pin 44 with the top edge of the opening 45. This movement of the latch member also serves to swing the releasing finger lG outwardly and tt'orwardly into the position illustrated in Fig. 7. The detent and the latch member sci to hold the window in open position until the stirrup is again depressed. Upon the succeeding downward movement ot the stirrup the detent is moved downwardly out of slot 42 and the spring 36', being beyond center as above stated, acts to swing the member 39 about the screw 41, the lower end of this member moving inwardly and the upper end moving outwardly, movement of the latch member being limited by contact of the pin 44: with the forward wall of opening 45 adjacent the upper end thereof. This serves to move the hook 4L1 outwardly or forwardly beyond the path of movement of the detent 4:3 and also serves to rock the finger 4:6 into its 'tull outer position. Upon release of the stirrup the window is moved downwardly into closed position, raising the stirrup and "arising the tripping pin 48 to contact with the outer end of finger 46 so as to swing the upper end of this fingerupwardly and in wardly about the screw 41. The relative positions of the parts immediately prior to complete closing of the window is illustrated in Fig. 8. This movement of the finger 46 serves to swing the lower end ot latch mem ber 39 outwardly or forwardly of the hood so that the lower end of the spring 36 is moved past center in a forward direction as the window approaches closed position, this spring then acting to return the latch memher to its operative position illustrated in Fig. 5. It will thus be seen that I have provided simple and highly etlicient means whereby the window may be opened and held in open position upon operation of the stirrup, the window being released and permitted to close upon a succeeding operation or depression of the stirrup, the latch member being held out of the path of movement of the detent upon the return upward travel of the stirrup and all parts being returned to their normal operative positions.

While I have illustrated the lower portion 39 of the latch member 39 as cut out to provide an opening or frame within which the spring 36 is disposed, this particular arrangement is not essential as it will be obvious that the tapered member-s33 and 33 can be secured to the arm 31 and portion 39, respectively, and offset therefrom. As above indicated, and as will be understood, changes in construction and arrangement of parts of the invention may be resorted to without departing from the field and scope of the same, and I intend to include all such variations, as fall within the scope of the appended claims, in this application in which the preferred form only of my invention is disclosed.

l Vliat I claim is 1. In combination, a hood having a sight opening, a window hingedly mounted at its upper edge adjacent the upper edge 0]": the opening for closing the same, arms extending rearwar lly and upwardly from said window, a stirrup connected at its ends to the arms, a detent carried by one of the arms, a latch member disposed for engagement with the detent and cooperating therewith to hold the window raised upon operation of the stirrup, means for yieldingly urging the latch memher into operative position and for moving it into inoperative position upon subsequent operation of the stirrup, and means for causing said member to be returned to operative position by said yielding means as the window is returned to closed position.

2. In combination, a hood having a sight opening, a window normally closing said opening and hingedly mounted adjacent the top thereof, yielding means urging the window in closing direction, arms extending upwardly and rearwardly from the window, a stirrup connected at its ends to the upper ends of the arms, a supporting bracket adja cent one end ot, the sight opening, a latch member slidably and rockably mounted on the bracket, means limiting rocking and sliding movement of the latch member in either direction, yielding means for completing the throw of the latch member beyond center in either direction, a detent on one of the arms cooperating with the latch member for holding the window open when the stirrup is operated, the detent acting upon release of the stirrup to move the latch member beyond center in releasing direction, said latch member being thrown beyond center upon the succeeding operation of the stirrup, and means for moving the latch member beyond center in holding direction as the window is lowered into closed position.

3. In holding and releasing latch means, a supporting bracket, a latch member rockably and slida-bly mounted on the bracket, means limiting rocking and sliding movement of the latch member in either direction, yielding means for completing the throw of the latch member in either direction beyond center, and a trip finger mounted on the bracket and connected to the latch member for moving it beyond center in one direction when said trip finger is actuated by a cooperating member.

4:. In combination, a hood having a sight opening, a window movable into and out of position to close said opening, latch and de tent means for positively holding the window open, and chin operated means for opening the Window and for releasing it from said holding means for closing the window.

5. In combination, a hood having a sight opening, a window movable into and out of position to close said opening, an operating arm secured to the window, latch and detent means ccacting with the arm for positively holding the window open, and a chin operated member connected to the arm, said holding means being released by movement of the arm in window opening direction succeeding opening of the window.

In witness whereof, I hereunto subscribe my name this 9th day of May, 1927.

MICHAEL STEIN.

Images