Title:
Shield for welders' hood windows
United States Patent 2352417


Abstract:
This invention relates to devices adapted for use on a welder's hood and has for its object to provide a shield for the window of the hood to protect it from impaired vision by rain drops on the glass either when it is in use or when the hood has been raised from in front of the face, and to...



Inventors:
Thorson, Alvin O.
Application Number:
US48545143A
Publication Date:
06/27/1944
Filing Date:
05/03/1943
Assignee:
Thorson, Alvin O.
Primary Class:
International Classes:
A61F9/06
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Description:

This invention relates to devices adapted for use on a welder's hood and has for its object to provide a shield for the window of the hood to protect it from impaired vision by rain drops on the glass either when it is in use or when the hood has been raised from in front of the face, and to shield the wearer from glare either of the sun or of artificial lights. Further objects are to provide such a device which automatically changes its relation to the hood as the hood is moved in front of, or above the wearer's head, and which is of extreme simplicity and one which is readily adaptable to any make of hood.

I attain these and other objects by the devices, mechanisms and arrangements illustrated in the accompanying drawing, in whichFig. 1 is a side elevation of the hood equipped with my device and shown in working position on the head; Fig. 2 is a similar view, showing the hood raised to inoperative position; Fig. 3 is a vertical section of the hood window, showing my device mounted on the hood and in the position shown in Fig. 2; and Fig. 4 is a rear elevation of a part of the hood showing the connection between the head band and the shield control lever.

Similar numerals of reference refer to similar parts throughout the several views.

Welder's hoods are usually made of fiber or of some other similar light material and are supported in front of the face by means of a head band. The hood is provided with a window usually including several thicknesses of clear glass and one thickness of colored glass adapted to protect the eyes from injurious rays produced in the welding operation. The hood is pivotally mounted on the head band in such a way that it may be swung upward above the head when the operator is not actually welding and wishes to see the work unimpaired by the 4( colored glass.

Referring to the drawing, the hood is made of a continuous sheet of material, suitably cut, bent and folded to produce a substantially flat rectangular front I with two side wings 2 and 4! with top and bottom inclined portions 3 and 4, respectively, to protect the top of the head and the throat of the wearer. A rectangular window frame 5 is secured to the front I of the hood, in line with the line of sight of the eyes, said frame 5i carrying a plurality of sheets of glass 6, one of which is composed of colored glass.

A hood support, comprising a head band 7 and a top band 8 are adapted to fit the upper part of the wearer's head. The side wings 2 of 5 the hood are pivotally attached to the head band 7, whereby the hood is supported. A chin rest 9 is mounted in the hood, on the inner side of the front I and is adapted to engage the chin of the wearer when the front I is substantially parallel with his frontal face line.

The head band 7 is usually adjustable to make it fit comfortably around the head. All the above parts refer to welders' hoods as at present made.

My appliance comprises a shield 10, of metal or other suitable material, having its edges 11 turned down all around, and slightly larger than the window of the hood. This shield 10 is pivotally mounted between two standards 13 which are secured to the front I of the hood at a suitable position above the window frame 5. The short bolts 12 may be used as pivots for the shield 10 on the standards 13. The bolts 12 pass through the vertical side edges 11 of the shield 10. The position of the standards 13 is well illustrated in Fig. 3 of the drawing, and they are adapted to hold the shield in such position as to completely cover the window frame 5, when it is folded down thereon as shown in Figs. 2 and 3, and to stand extended over the said frame when it is turned outward on the pivots 12, as seen in Fig. 1.

The motion of the shield 10 in relation to the front I and its window frame 5, is automatically accomplished by the following described mechanism. One of the normal pivots between the head band 7 and the side wing 2 is replaced by a bolt 14 (Fig. 4). This bolt 14 is clamped to the head band 7 by means of the nut 15 and lock Snut 16 so that it is not permitted to turn in relation to the head band 7.

The bolt 14 then passes loosely through a pivot hole in the adjacent side wing 2, thus forming one of the pair of pivots between the head 0 band and the hood. A short lever 17 is clamped on the bolt 14 between the nuts 18 and 19 and these nuts are locked by the two lock nuts 20.

Thus it will be seen that the lever 17 has a fixed, though adjustable, position in relation to 5 the head band 7. A link 21 connects the lever 17 with the shield 10.

The lever 7I has a plurality of holes 22 therein, through one of which I pass the crank bolt 23 and clamp it to the lever 17 by a suitable 0 nut 24. A pair of nuts 25 are screwed and locked on the end of the bolt 23, leaving a space between them and the said nut 24. The link 21 is provided with an eye 26, at one end, through which said bolt 23 passes and said eye is posi5 tioned in the said space on the bolt 23. The side edge II of the shield 10 is provided with a series of spaced holes 27 into one of which the other end of the link 21 is hooked.

Thus it will be seen that when the hood is turned on its pivots on the head band 7 to its .noperative position (Fig. 2) the positions of the lever 17 and of the eye 26 of the link 21 are not altered, but the relative position of the pivot 12 is changed with the result that the link 2 1 swings the shield 10 down, relatively to the front of the hood, thus bringing it into the position shown in Figs. 2 and 3; while if the hood is swung down into operative position the said movement of the pivot 12 and link 21 lift the shield 10 from off the window frame 5 and hold it in extended position above the window frame 5 to protect the window from rain or glare, as seen in Fig. 1.

When the hood is in the position shown in Figs. 2 and 3 the shield 10 lies over the glass and keeps it dry and clean so that it is unnecessary for the welder to waste time in wiping the rain off the window or otherwise cleaning it.

It is, of course, to be understood that many details of my invention as may be found convenient for the manufacturer or for practical reasons, may be changed from those above described without departing from the spirit thereof as outlined in the appended claims.

Having described my invention, what I claim and desire to secure by Letters Patent is: 1. In a welder's hood, the combination of a head band; a hood pivotally supported thereby and adapted to lie in front of the face or over the head, and having a window; a shield pivotally supported by said hood and adapted to extend from the hood, over the window, when the hood is in front of the face or to lie on the window when the hood is over the head; and means connecting said head band and said shield whereby said shield is automatically swung on its pivot in relation to the window as the hood is moved in relation to the wearer's head.

2. In apparatus as set forth in claim 1, wherein said means comprises a lever connected to said head band at the pivot of the hood thereon, and a link connecting the end of said lever with said shield.

3. In apparatus as set forth in claim 1, wherein said means comprises a pivot bolt attached to said head band in non-rotary relation thereto and forming a pivot for said hood; a lever attached to said pivot bolt, outside of said hood, and in non-rotary relation to said pivot bolt; and a link connecting the end of said lever with said shield.

4. In a welding hood having a headband and a window, a closure pivotally attached above said window and movable with respect thereto, means pivoting said hood to the headband including a pivot member fixed with respect to said headband and carrying an arm fixedly attached thereto, means interconnecting said arm and said closure for operation of the closure upon raising and lowering movements of said hood.

5. In a welding hood having a headband and a window, a closure pivotally attached above said window and movable with respect thereto, means pivoting said hood to the headband including a pivot member fixed with respect to said headband and carrying an arm fixedly attached thereto, means interconnecting said arm and said closure for operation of the closure upon raising and lowering movements of said hood, and means for adjusting said closure with respect to said headband.

ALVIN O. THORSON.