US2641768A

US2641768A - Protective hood

Info

Publication number: US2641768A
Application number: US246731A
Authority: US
Inventors: George J Pipher
Original assignee: Willson Products Inc
Current assignee: Willson Products Inc
Priority date: 1951-09-15
Filing date: 1951-09-15
Publication date: 1953-06-16
Anticipated expiration: 1970-06-16

Description

June 1953 G. J. PIPHER I PROTECTIVE HOOD Filed Sept. 15, 1951 INVENTOR.

m M H r P r H 7% E A G R 0 E e G j Patented June 16,1953

PROTECTIVE HOOD George J. Pipher, Reading, Pa., asslgnor to Willson Products, Inc., Reading, Pa., a corporation of Pennsylvania Application September 15 1951, Serial No. 246,731

2 Claims. (Cl. 2205) The present invention relates to a protective hood for industrial purposes for protecting the wearer against dust and, more particularly, chemicals and chemical fumes or mists which might otherwise be harmful'to the wearer and to his clothing.

An outstanding objection of conventional hoods of the type having a window is that the window is not readily replaceable with a liquid or vaportight fit so as toprevent the entrance of sprays or splashes of chemicals through the joint between the window and hood. Still another disadvantage of industrial hoods having replaceable windows is that they are usually complicated in construction and do not lend themselves to quick and easy replacement of the window, nor are they adaptable for the use of curved windows follow- 7 ing substantially the contour of the hood about the face of the wearer to increase visibility in a invention will become apparent from a study of the following description taken with the accompanying drawing wherein:

Figure 1 is a front elevational view of a hood, shown partly broken away, and including a removable window and supporting frame embodying the principles of the present invention;

Figure 2 is a side or perspective view of the hood structure shown in Figure 1, and

Figure 3 is an enlarged, fragmentary view of a portion of the structure shown in Figure 2.

Referring more particularly to the drawing, numeral I denotes a hood of any suitable pliant material, preferably treated cloth or plastic, such as, for example, vinyl chloride acetate, known in the trade as Vinylite. The latter is especially suitable since it is resistant to chemicals in liquid or vapor form and is readily washable as well as being durable. Vinylite is also transparent or translucent which may be desirable for certain purposes although this quality is not essential for a chemical-protective hood. Of course, other materials, preferably plastic materials, may be substituted. Hood I has pleats, such as la through which a curved, metal supporting strip lb is introduced for attachment to the inner surface of the hood and onto the exposed portion of which a window frame portion 3 is attached. The window frame comprises a pair of substantially U-shaped, window'frame portions 2 and 3, preferably of aluminum or perhaps rigid fibrous or plastic material, each frame portion having two superimposed and slightly spaced pieces of substantially the same shape, such as 2--2a and 3 -311, between which is sandwiched a marginal portion of the hood I which marginal portion is securely fastened between the two spaced pieces by rivets, such as 4, or other suitable fastening means. The spaced pieces constituting window frame portions 2 and 3 are more clearly shown in Figure 3, it. being noted that'the inner pieces 2a and 3a have margins which extend laterally inwardly of the margins of the outer frame pieces. Thus there is a groove 8 provided between the spaced pieces 2 and 2a as well as between

pieces

3 and 3a having a width substantially equal to or greater than the thickness of the material forming hood 1, depending upon whetherthe marginal portion is folded or not along the periphery defined byrivets A. It will be noted that the groove between pieces 2 and 201, as well as between pieces 3 and 350 extends to a depth almost up to the rivets 4, that is, up to the inner marginal edge portions of the window forming cutout in hood I. The window frame portions 2 and 3 are substantally ushaped and are outwardly curved so as to increase the view of the wearer in a sidewise direction. The windowframe portions 2 and 3 are pivotally con' nected together at the extremities of the Us by means of threaded studs 6 onto which are screwed thumb nuts 5 which when tightened clamp the extremities of portions 2 and 3 together. The extreme end portions of

pieces

3 and 3a are laterally ofiset, forming forks which closely surround the end portions of pieces 2 and 2a.

In operation, when it is desired to insert into the window frame a window I, such as one of flexible, transparent plastic material, both nuts 5 are unscrewed and window frame portion 3 is pivotally moved about studs 6 as a pivot until it assumes the position shown in Figure 2.

moved downwardly onto the top marginal portion of the curved window '1 by loosening nuts and pivotally moving frame portion 3 downwardly about an axis extending through the studs 6. The upper marginal portion of window 1 will extend into the groove formed between the outer and inner pieces of the top window frame portion 3. Also, the top side portion of window 1 will extend into a continuation of the same groove formed in the legs of the upper substan tially U-shaped frame portion 3, as shown more clearly in Figure 3. Thus there will be provided a continuous groove formed between the outer and inner pieces of the window frame portions 2 and 3 throughout the entire perimeter'of the window frame. After the portion 3 has been pivotally moved downwardly as far as possible so that the perimetrical edge of'the'window I will contact the window forming edge of the hood material I sandwiched between the outer and inner pieces of frame portions 2 and 3, the nuts 5 are tightened so as to securely clamp the extremities of the substantially U-sha oed frame portions 2 and 3 into position, thereby forming a dust-tight as well as vapor-tight joint between the margin of the udndow I and the window frame portions 2 and 3. Of course, when it is desirable to remove the window 1, nuts 5 are unscrewed and window frame portion 3 is tilted upwardly and rearwardly about the pivots 8 and the window 1 is lifted from the groove 8 formed in the lowermost window frame portion 2.

It will be understood that if it is desired to mount a respirator on the window I, a suitable cut out may be made through the window 1 through which such respirator may be projected and mounted.

Thus it will be seen that I have provided an efficient, protective hood which is particularly suitable for the chemical industry in that it protects the wearer against chemical fumes or sprays and which embodies a quickly and easily replaceable window which will maintain a liquid-tight as well as vapor-tight fit at the connection between the window frame and window and thereby offers maximum protection to the wearer against infiltration of vapors or even gases through said connection; furthermore, there is provided an outwardly curved window for increasing the visibility in a sidewise direction of the wearer.

While I have illustrated and described a certain specific embodiment of my invention, it will be understood that this is by Way of illustration only, and that various changes and modifications may be made within the contemplation of my 4 invention and within the scope of the following claims.

I claim:

1. An industrial, protective hood having a cutout portion, a window supporting frame attached to the margin of said cutout portion, said frame comprising a pair of substantially U-shaped members with their extremities pivotally connected together so as to form a continuous substantially rectangular window frame, the bases of said U-shaped members being outwardly curved, a continuous groove formed along the entire inner marginal portions of said U-shaped members, a replaceable, outwardly curved window having a marginal portion which is shaped so as to fit into'said groove and a threaded stud and nut for selectively clamping each pivotal connection between the extremities of said U- shaped members.

2. An industrial hood for providing protection against chemicals and chemical mist and vapors, comprising a hood of chemically resistant plastic material having a cutout portion defining a window, a pair of substantially U-shaped window frame portions, one being inverted with its extremities slightly overlapping the extremities of the other U-shaped window frame portion, each of said portions being outwardly curved and comprising a pair of slightly spaced pieces of substantially the same shape having sandwiched therebetween a marginal portion of said hood forming the base of a groove defined by said pieces, fastening means for clamping said marginal portion between said pieces, a pair of pivotal connections, each extending through one of said overlapped extremities of said U-shaped window frame portions, and an outwardly curved window of flexible, transparent plastic material shaped so that its marginal portion will extend into the inner marginal groove defined by the space between said outer and inner pieces, each of said pivotal connections including a nut for detachably clamping said extremitie of said window frame portions together so as to provide a substantially vapor-tight fit between the outer marginal portionof the window and the window frame portions.

GEORGE J. PIPHER.

References Cited in the file Of this patent UNITED STATES PATENTS Number