GB2132377A

GB2132377A - Improved welding mask

Info

Publication number: GB2132377A
Application number: GB08236451A
Authority: GB
Inventors: Pin-Shen Chen
Original assignee: CHEN PIN SHEN
Current assignee: CHEN PIN SHEN
Priority date: 1982-12-22
Filing date: 1982-12-22
Publication date: 1984-07-04

Abstract

An improved welding mask having a mask body (1), a protruding frame (10) provided in the body (1) with an overlapping transparent sheet and filter sheet, and a strap (2) for the user to wear the mask, wherein the overlap provides a slot (1) above the eye level of the user. A shielding member (42) may protrude for protecting the user against the spewing of hot slag as well as from infra-red and ultra-violet rays during welding. A slidable plate (43) may be moulded on the opposing side walls of the frame 10 for movement forming an angle at the outer end of the shielding member for enabling the user to perform welding at a higher position under safety protection. <IMAGE>

Description

SPECIFICATION Improved welding mask This invention relates to an improved mask, which is designed to facilitate utilization, promote welding efficiency and eliminate the hazardous condition when welding is performed at a higher position.

Conventionally, the welding mask is divided into two kinds - a hand holding type and a helmet type. The hand-holding mask has a filter lens provided in the mask body. During welding, the operator grasps the holder of the gas torch with one hand and put the mask to his face with another hand for looking through the filter lens thereof. At this time, owing to the blurred vision of the filter lens, the operator usually has to blaze the torch on the workpiece first for producing the bright sparks for enabling him to clearly see the related position between the holder and the workpiece so as to align the welding spot and perform welding. For this reason, the workpiece is usually stained with at least a blazed speck thereon, leaving an undesirable appearance to the workpiece.On the other hand, as the operator has to use his both hands for performing the welding, he has no any alternative to handle the workpiece (such as in performing angular welding or under the condition of lacking ground clamp, the workpiece must be held by hand for operation), a defective welding is often incurred thereat such as deflected welding position, which affects the precision of welding to a high degree.

As for the helmet-type mask, a movable filter lens is usually provided on the mask body, and a strap available for the user to wear the mask at the head. During welding, the operator lifts up the movable filter lens first so as to see the related position of the workpiece and the holder of the torch thereof, and then, covers up the movable filter lens, and starts to perform welding operation therewith. Although the operator can spare one of his hands to handle the workpiece, he has often to open and close the movable filter lens in order to check the welding spot and align the position for ensuring the precision of welding. Therefore, the problem still not completely solved for effectively performing welding operations.

Furthermore, when performing welding operation at a higher position, no matter whether the operator uses a hand-holding mask or a helmet mask, he cannot always spare one of his hands to handle the workpiece thereat, so that, safety is not ensured, and accident often occurs.

It is accordingly a primary object of this invention to provide an improved welding mask with a perspective window located on the filter lens above the eye level of the user so as to enable him to clearly see the workpiece through the perspective window.

It is another object of this invention to provide an improved welding mask with a fixed shielding member disposed below the perspective window for protecting the user against the spewing of the hot slag as well as the projection of the infra-red and ultraviolet rays thereof.

It is still another object of this invention to provide an improved welding mask with a slidable damper movably disposed over the fixed shielding member so as to facilitate welding operation at a higher position under safety protection.

These and other objects are achieved by providing an improved welding mask, which comprises a perspective window provided in the upper portion of the filter lens over the eye level of the user with a perspective lens installed therein for facilitating the user to look through the window by way of moving up his head or lifting his eyes so as to align the precise location of the welding spot at the workpiece, and a protruding shielding member provided below the perspective window for protecting the user against the spewing of the hot slag as well as the projection of the infra-red and ultra-violet rays thereof.

Moreover, a slidable damper is movably arranged thereto for making telescopic movement over the fixed shielding member for enabling the user to perform welding at a higher position under safety protection against the spewing of the hot slag and the projection of the infra-red and ultra-violet rays.

These objects and advantages of the present invention will become clear from the following description of preferred embodiments when read in conjunction with the, in which accompanying drawings, in which: Figure 1 is a front view of a first preferred embodiment of an improved welding mask according to this invention; Figure 2 is a side sectional view of the embodiment shown in Fig. 1; Figure 3 is a side sectional view of a second preferred embodiment of an improved welding mask according to this invention; Figure 4 is a partial sectional side view of a third preferred embodiment of an improved welding mask according to this invention; Figure 5 is a partial sectional top view of the embodiment shown in Fig. 4; and Figure 6 is a side sectional view of a fourth preferred embodiment of an improved welding mask according to this invention.

Referring to Figs. 1 and 2, a first preferred embodiment of an improved welding mask according to this invention includes the combination of a welding mask by having a mask body 1, a protruding frame 10 provided in the body 1 with a perspective lens 3 and a filter lens 4 disposed therein, and a strap 2 for the user to wear the mask body 1 at his head, which are all similar to the prior art, wherein, the improvement of this invention resides in a horizontal perspective window 41 provided at the upper portion of the filter lens 4 and over the eye level of the user. The window 41 has a proper thickness, and a perspective lens can be installed therein for the user to look through.Since the above-said thickness is that of the filter lens 4 or the equivalent, before starting to weld, just bowing down his head a little and making the welding mask decline an angle thereat, the user can easily look through the window 41 and clearly see the workpiece and the holder in his hand so as to be precisely aligned to the working point of welding.

When starting to weld, just lift up his head a little and let the welding mask raise an angle, the user's eyes are again behind the filter lens 4 for being protected against the projection of the infra-red and ulta-violet rays thereof.

As shown in Fig. 3, the improvement of this invention further resides in a fixed shielding member 42 provided under window 41 in a slightly upward inclination so as to protect the user against the spewing of the hot slag as well as the projection of the infra-red and ultra-violet rays during welding.

Referring to Fig. 4, the improvement of this invention still further resides in a slidable damper 43 movably provided in overlapping with the fixed shielding member 42. The structure of the slidable damper 43 includes a pair of protruding axle rods 431 separately disposed at the opposing side walls of the damper 43. Each one of the axle rods 431 has a threaded portion for being secured by a nut thereof, and movably arranged in a horizontal groove 432 formed along the opposing side walls of the fixed shielding member 42 so as to enable the slidable damper 43 to flatly make a telescopic movement along the fixed shielding member 42.Besides, when the slidable damper 43 moves to the outer end of the fixed shielding member 42, the slidable damper 43 can be inclined upward in an angle around the axle center of axle rods 431, which when being placed in an upward angle thereat, the slidable damper 43 will not fall therefrom. In this way, when the user performs welding at an uprised position, the slidable damper 43 can effectively protect him against the spewing of the hot slag as well as the projection of the infra-red and ultraviolet rays thereof. It should be appreciated that the way of arranging both the fixed shielding member 42 and the slidable damper 43 can be made in any suitable known technique. As this is not a silient feature of the invention, explanation is hereinafter omitted.

Referring to Fig. 6, the improvement of this invention further resides in a perspective window 11 horizontally provided above the protruding frame 10, and a perspective lens can also be installed therein for clearly looking through. The location of the window 11 is also above the user's eye level for enabling the user to look through it in similar way as that described for the first embodiment shown in Figs. 1 and 2. In addition, a shielding member 12 is also provided on the upper portion of the filter lens 4 for effecting the same functions as hereinbefore described in the second embodiment shown in Fig. 3.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims which scope is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures.

Claims

1. An improved welding mask having a mask body, a protruding frame provided in the body with a perspective lens and filter lens overlappingly disposed therein, and a strap for the user to wear the mask at head, wherein, the improvement is characterized by: a looking through means having perspective lens disposed therein provided in said mask body over the eye level of the user for enabling the user to clearly see the workpiece and the holder of his torch therefrom before starting to weld; and protruding shielding means installed below said looking through means for protecting the user against the spewing of hot slag as well as the projection of the infra-violet rays thereof.

2. An improved welding mask according to Claim 1 wherein said looking through means is characterized by a perspective window horizontally provided in the upper portion of the filter lens thereof.

3. An improved welding mask according to Claim 1 wherein said looking through means is characterized by a perspective window horizontally provided above the protruding frame thereof.

4. An improved welding mask according to Claim 1 or 2 wherein said protruding shielding means is characterized by a fixed protruding shielding member disposed on the filter lens below said perspective window.

5. An improved welding mask according to Claim 1 or 4 wherein said protruding shielding means is characterized by a slidable damper movably disposed on the opposing side walls of said fixed shielding member for making telescopic movement therefrom and forming an uprised incling angle at the outer end of said shielding member.

6. An improved welding mask substantially hereinbefore described with reference to the accompanying drawings.