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Electro-optic light shutter and frame assembly with integrated switching mechanism
| Details |
Inventors: Fergason, Jeffrey K.; Fergason, John D.;
Assignee: OSD Envizion Company (Menlo Park, CA)
Primary Examiner: LaRoche; Eugene R.
Assistant Examiner: Mai; Son
Attorney, Agent or Firm: Renner, Otto, Boisselle & Sklar
A frame assembly for a light shutter including a frame structure for enclosing an electro-optic shutter assembly, the frame structure having a front surface which can be positioned opposite a cover lens, and a switch for controlling an operation mode of the electro-optic shutter assembly, the switch being mounted on the front surface whereby pressure applied to the cover lens activates the switch. The frame assembly can be inserted and used in a welding helmet or other protective eyewear having a standard sized lens aperture. |
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DETAILED DESCRIPTION The present invention overcomes the above-mentioned shortcomings associated with existing light shutters used for eye protection.
The various objects, features, aspects and advantages of the present invention will become more apparent as the following description proceeds.
It will be appreciated that while a preferred embodiment of the invention is described herein, the scope of the invention is to be determined by the claims and equivalents thereof.
The present invention is particularly useful for eye protection wherein the light shutter is to be used with other components having standard dimensions such as a helmet or goggle assembly or in another device, if desired.
The light shutter of the present invention provides a self contained unit which can be inserted in a standard sized lens aperture in a helmet or goggle assembly.
Moreover, the switching mechanism for powering the light shutter on and off is an integral part of the light shutter frame assembly.
The light shutter can be easily activated, as a result, from the outside of the helmet or goggle assembly.
The present invention need not be used with other custom components and does not require alteration or modification of the helmet, goggles, or the like, or the alteration of other standard components or parts.
Exemplary uses of the present invention include welding helmets, spectacles, goggles, and the like, as well as satiety goggles for nuclear flash protection, for protection from hazards experienced by electric utility workers and for workers at furnace and electrical plant areas and at other places where bright light that could present a risk of injury may occur.
The light shutter of the present invention may be used in a variety of embodiments and applications.
The shutter is adjustable to control light, i.
e.
, to increase or to decrease the amount of the incident light which is transmitted through the shutter.
When welding is not occurring, for example, the shutter in a welding helmet may be substantially optically clear or transmissive or at least minimizes its attenuation of light
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Optical Systems 
